MINISTRY OF LABOUR, WAR INVALIDS AND SOCIAL AFFAIRS
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SOCIALIST REPUBLIC OF VIETNAM
Independence - Freedom - Happiness
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No.: 11/2020/TT-BLDTBXH

Hanoi, November 12, 2020

MINISTER




Dao Ngoc Dung

No.

Occupation or work

Working conditions

Class-VI working conditions

1

Drilling rock with a hand-held machine hammer in the pit

Working in a confined space lacking light and oxygen; arduous and dangerous work; working under impact of dust, noise and tremor in excess of permissible limits

2

Pit mining

Working in confined space lacking oxygen; manual and extremely arduous and dangerous work; working under impact of dust, noise and CO^2.

3

Drying, grinding, mixing and packaging explosives

Hazardous and dangerous work; working in frequent contact with high temperature, noise, dust and toxic chemicals ^{(TNT, Cl2, Licacmon...).}

4

Operator of loader or excavator with bucket capacity of at least 8m³

Arduous work; static working posture; working under impact of dust, noise and tremor in excess of permissible limits.

5

Mine rescue team member

Extremely dangerous occupation

6

Extracting non-ferrous metal ores by underground mining method

Working in confined and wet space lacking oxygen; manual and extremely arduous and dangerous work; working under impact of dust, noise and CO₂

7

Operating hydrometallurgy and pyrometallurgy equipment (copper, zinc, tin, titanium, chrome, wolfram, etc.).

Working under impact of high temperature, dust, arsenic, noxious gases and chemicals.

Class-V working conditions

1

Drilling to extract rocks by hand-held machine hammer

Working on rocky mountain sides; arduous and dangerous work; working under impact of dust, noise and violent tremor

2

Operating rotary bit drilling rigs or pluggers

Working outdoor; dangerous work; working in frequent contact with noise and dust in excess of permissible limits

3

Electrical and mechanical repairer in the pit

Working in confined space; dangerous work; static working posture; working under impact of noise and coal dust

4

Operating pneumatic fan, electrical, diesel fuel, and battery charging stations in the pit

Working in confined space lacking oxygen; dangerous work; working under impact of dust, noise and heat.

5

Iron worker or drainage worker in the pit

Manual, arduous and dangerous work; working under impact of dust, noise and ^CO2.

6

Driver or driver’s assistant of coal-carrying train

Dangerous works; working under impact of noise, tremor and dust.

7

Transporting coal in the pit.

Manual, arduous and dangerous work; working under impact of noise, dust and heat.

8

Gas measurement, wind speed measurement, air-gate watch, land survey and quality control in the pit

Arduous and dangerous work; static working posture; working under impact of noise, heat and dust.

9

 Directly providing technical guidance in the pit.

Solving multiple complex works; working at a heat, dust and dangerous workplace.

10

Keeper of blast warehouse in a pit

Hazardous and dangerous work; working under impact of noise, heat and dust

11

Sampling and performing chemical analysis of coal.

Working in frequent contact with heat, dust, CO and other toxic chemicals.

12

Building and repairing mine pathways

Manual and arduous work; working under impact of heat, dust and noise.

13

Operating super and church drilling machines at opencast mines

Arduous and dangerous work; working under impact of dust, noise and violent tremor.

14

Opencast blasting

^{Arduous and dangerous work; working under impact of dust, noise and NO2.}

15

Manual quarrying

Manual, arduous and dangerous work; working under impact of heat, dust and noise; workers are likely to suffer from occupational diseases.

16

Driver, driver’s assistant and escort of vehicles used for transporting explosives.

Arduous and dangerous work; working under impact of noise, tremor and dust.

17

Seafarer, technician, oiler of ships carrying explosives

Arduous and dangerous work; working under impact of wave, noise and tremor.

18

Maintaining, loading and unloading explosives

Manual, arduous and dangerous work; working under impact of dust and noxious gases

19

Explosive testing

^{Working outdoor; dangerous work; working under impact of noise, dust and NO}2^.

20

Blasting for extracting kaolin

Working outdoor; arduous and dangerous work; working under impact of noise and soil and rock dust with high content of ^SiO2

21

Forging machine hammer of at least 1 ton.

Working under impact of high temperature, tremor and noise in excess of permissible limits

22

Giving production guidance in the pit (foreman, vice foreman, pit captain, pit manager).

Solving multiple complex works; working in confined space lacking oxygen; working under impact of dust, noise and CO₂

23

Extracting non-ferrous metal ores by opencast or semi-opencast mining.

Manual work; working in a hot space lacking oxygen and in frequent contact with toxic dust.

24

Operating equipment for dressing of non-ferrous metal ores by flotation, gravity concentration, magnetic separation (separating, leaching, etc.)

Working under impact of noise, dust, toxic chemicals, arsenic, metal oxides, etc.

25

Operating ancillary equipment in hydrometallurgy and pyrometallurgy (copper, zinc, tin, titanium, chrome, wolfram, etc.).

Working in frequent contact with high temperature, arsenic, noxious gases and chemicals

26

Supervising safety in the pit; operating and repairing equipment in the pit; operating and assisting operator of electric and battery-powered locomotives in the pit; operating, repairing and charging batteries in the pit; performing acceptance testing of products in the pit; warehouse keeper in the pit; protecting warehouses in the pit; cleaning, dredging pit sediments; transporting materials in the pit; watching signals in the pit; service staff in the pit; installing and repairing communication systems in the pit; operating network station in the pit; guarding wind gate in the pit; measuring gas and wind speed in the pit.

Working in confined space; dangerous work; static working posture; working under impact of noise, coal dust and CO₂

27

Electrolysis workers (caring, moving anodes and cathodes, sediments, etc.), producing copper ingots

Working under impact of high temperature, dust, noxious gases; facing high risks of acid burns

28

Processing electrolytic sediments, obtaining precious metal in production of non-ferrous metals

Working in frequent contact with high temperature, arsenic, noxious gases and metal oxides, etc.

29

Repairing non-ferrous metal melting and smelting furnaces

Working in frequent contact with high temperature, arsenic, noxious gases and metal oxides, etc.

30

Keeping industrial hygiene in production of non-ferrous metals

Manual work; working in frequent contact with heat, toxic dusts, noxious gases and other solvents

31

Workers in charge of mixing and pouring concrete inside the pits.

Working in confined space lacking oxygen; static working posture; working under impact of noise, heat and dust.

32

Performing mine gas monitoring in the pit.

Frequently working in the pit, in confined and dangerous space lacking oxygen; static working posture; working under impact of noise, heat and dust.

33

Driving graders and bulldozers of a capacity of at least 180 CV

Static working posture; working under impact of dust, noise and tremor.

34

Operating shell and tube heat exchangers in silicon pretreatment, alkali tanks, silicon treatment for alumina plants

Working under impact of high temperature, alkali vapor and radioactive substances, and noise in excess of permissible limits

35

Operating shell and tube heat exchangers in separation areas; vapor separation at alumina plants

Working under impact of high temperature, alkali vapor and radioactive substances, and noise in excess of permissible limits

36

Operating the hydrate filtration and alumina melting chamber

Arduous and hazardous work; working under impact of heat radiation, CO, noise and tremor in excess of permissible limits

37

Operating coal gasification furnace

^{Working under impact of heat, noise, tremor, dust with high content of H2; CO; CO2}

Class-IV working conditions

1

Operating iron-ore dressing slurry pump in the pit

Working in deep pit, muddy and confined space lacking light, and under impact of noise.

2

Operating rotary shifters in iron ore dressing.

Working on the shifter, under impact of noise

3

Operating coarse crusher in iron ore dressing.

Working in deep pit, muddy and confined space lacking light, and under impact of noise.

4

Operating conveyor belt in dressing of underground iron ore mine

Arduous work with noise

5

Operating vibrating shifter in iron ore dressing.

Working under impact of noise and vibration

6

Operating ball mill crusher in ore dressing.

Muddy and wet working conditions; working under impact of noise

7

Operating medium-size crusher in ore dressing.

Working in frequent contact with noise Working on the floor, constantly moving

8

Operating water gun used in ore dressing

Arduous work; working in confined and wet space with noise

9

Electrical and mechanical repairing at opencast mines

Static working posture; working under impact of noise, lubricants and dust

10

Operating dewatering pump under the pit

Working under impact of noise, vibration and heat

11

Manually washing and screening, manually extracting coal at opencast mines

Arduous work; working outdoor and under impact of noise and dust

12

Operating conveyor belt, crusher, coal/rock sieve; operating coal chutes. 

Arduous work; working under impact of noise, tremor and dust in excess of permissible limits.

13

Guarding, delivering, warehouse keeper/ assistant at explosives manufacturing facility

Working at dangerous and poorly ventilated space, and under impact of toxic gases and dust

14

Testing on explosives

Working in frequent contact with chemicals and toxic dust

15

Driving explosives lifting machine

Working under impact of toxic chemicals and dust

16

Electrical and mechanical repairing of explosives manufacturing equipment

Static working posture; working under impact of petro, oil, toxic dust and chemicals

17

Industrial cleaning of explosives manufacturing facility

Manual and arduous work; working under impact of toxic dust and chemicals

18

Directly providing production guidance and inspecting quality of explosives.

Working in frequent contact with chemicals and toxic dust

19

Driving graders and bulldozers of a capacity of less than 180 CV

Working under impact of heat, noise, dust and vibration

20

Operating loader or excavator with bucket capacity of less than 4 m³.

Working under impact of heat, noise, dust and vibration

21

Operating stone crushing and screening machine

Working outdoor and under impact of noise, tremor and dust of very high content.

22

Driving coal/stone-carrying vehicle in a mining area

Arduous and dangerous work; working under impact of noise, tremor and dust in excess of permissible limits.

23

Making paper tubes for explosive packaging

Working under impact of heat and toxic chemicals during the shift

24

Manually extracting kaolin at opencast mines

Working outdoor; manual and arduous work; working under impact of hot, cold, wind at deep pit, and stone dust with high content of ^SiO2

25

Manually processing kaolin

Working outdoor; arduous, manual and monotonous work; working under impact of soil and rock dust with high content of SiO₂

26

Operating grue portique/gantry crane, coal loading/unloading machines at coal washing and screening plant.

Working at height and under impact of sunlight, heat and dust; stressful work.

27

Operating dump car at coal washing and screening plant

Working outdoor and under impact of sunlight, heat and coal dust in excess of permissible limits.

28

Electrical and mechanical repairing at coal washing and screening plant

Arduous work; static working posture; working in frequent contact with lubricants, coal dust, high temperature, tremor and noise in excess of permissible limits

29

Charging grease and pumping oil for pillow blocks of equipment at coal washing and screening plant

Arduous work; working in contact with lubricants, heat, noise, tremor and coal dust in excess of permissible limits

30

Putting vehicle lifts and stoppers at coal washing and screening plant

Arduous and dangerous work; working under impact of heat, noise, tremor and coal dust in excess of permissible limits.

31

Manually moving coal and impurities on trains, barges, conveyor belts and at coal washing and screening plant

Arduous work; working under impact of heat, noise, tremor and coal dust in excess of permissible limits.

32

Picking up coal and impurities on conveyor belts at coal washing and screening plant.

Monotonous work; working under impact of heat, noise, tremor and coal dust in excess of permissible limits.

33

Unloading coal (taking coal, pouring coal, opening coal chutes, etc.) at coal washing and screening plant

Working under impact of heat, noise, tremor and coal dust in excess of permissible limits; work with dangerous factors

34

Hooking (hooking cables and chains) at coal washing and screening plant

Arduous and monotonous work; working outdoor and under impact of environmental factors (hot, cold, wind, etc.), and coal dust in excess of permissible limits.

35

Repairing and maintaining coal mining equipment (drills, excavators, graders, bulldozers, etc.)

Arduous work; static working posture; working in contact with dust and lubricants

36

Directly providing production guidance in opencast coal mining and at coal washing and screening plant (foreman, vice foreman, team leader)

Working under impact of heat, noise, and tremor and coal dust in excess of permissible limits.

37

Operating coal washing and screening equipment by adopting flotation or magnetic separation at coal washing and screening plant

Working in frequent contact with noise, dust and chemical hazards.

38

Doing industrial cleaning job at mining equipment and vehicle repairing plants

Manual work; working under impact of noise, lubricants and industrial waste.

39

Protecting resources and boundaries of coal mines.

Working outdoor; constantly moving; dangerous work.

40

Workers in charge of charging batteries and repairing mining lamps; repairing and distributing batteries and mining lamps.

Manual work; working in frequent contact with lead and acids.

41

Workers in charge of repairing coal loading/unloading machines in coal washing and screening plant

Working at height; dangerous work; static working posture.

42

Keeping industrial explosive warehouses.

Working outside the pit; arduous and dangerous work; working in contact with toxic chemicals.

43

 Directly providing production guidance in opencast bauxite mining and bauxite ore dressing (foreman, vice foreman, team leader)

Working under impact of heat, noise, tremor and dust in excess of permissible limits.

44

Operating conveyor belts carrying bauxite ores in alumina production.

Arduous work; working under impact of noise, tremor and dust in excess of permissible limits; working in confined space

45

Operating sludge pumping system in bauxite ore dressing

Arduous work; muddy and wet workplace; working under impact of noise and tremor. Working in direct contact with acids, alkali, soda, etc.

46

 Directly providing production guidance in coal gasification and alumina production plants (foreman, vice foreman, team leader)

Working under impact of alkali vapor, noise, tremor and dust in excess of permissible limits

47

Operating the centralized control system for alumina production plant and its plants

Stressful work; working under impact of noise and tremor.

48

Operating bauxite materials unloading/tripper equipment

Constantly moving; working in confined space and under impact of noise, dust and tremor in excess of permissible limits

49

Operating equipment in red mud accumulation and washing area

Working under impact of heat, height, high temperature, alkali vapor and radioactive substances, and noise in excess of permissible limits

50

Operating equipment in hydrate crystallization area

Working under impact of high temperature, alkali vapor and radioactive substances, and noise in excess of permissible limits

51

Operating bauxite ore crusher

Arduous work; muddy and wet workplace; working under impact of noise and tremor.

52

Operating lime unloading, milk and slaking machine in alumina plant

Arduous work; working in confined space and under impact of noise, tremor and dust in excess of permissible limits, and in frequent contact with lime milk

53

Operating lifting equipment in alumina plant

Arduous and hazardous work; working under impact of noise and trust in excess of permissible limits

54

Repairing electrical equipment, C&I engineering in the ore dressing and alumina production line

Static working posture; working under impact of noise, tremor and dust; working at height

55

Repairing and maintaining electromechanic equipment, mechanical equipment, motor equipment used in bauxite mining and dressing, and alumina production.

Arduous work; static working posture; working in contact with heat, dust and noise in excess of permissible limits, and lubricants

56

Operating the conveyor belt supplying coal to coal gasification plant

Working underground and under impact of heat, noise, tremor and coal dust in excess of permissible limits; work with dangerous factors

57

Operating soda/acid dilution and condensation equipment in solution calibration

Working under impact of high temperature, alkali vapor and radioactive substances, and noise in excess of permissible limits

58

Operating and installing pipelines of red mud disposal lake

Arduous work; working outdoor and under impact of alkali vapor and red mud

59

Operating hydrate and alumina product packaging system

Arduous and hazardous work; working under impact of noise and trust in excess of permissible limits

60

Operating heavy-duty fans in coal gasification

^{Working under impact of heat, noise, tremor, dust, H2; CO; CO2 with high content}

61

Environmental monitoring at alumina plant

Arduous and hazardous work; working in direct contact with chemicals, noise and dust in excess of permissible limits; sampling at confined locations, pits, sewage sewers.

62

Doing industrial cleaning job at alumina plant

Arduous work; muddy and wet workplace; working under impact of noise, tremor and dust in excess of permissible limits

63

Healthcare in pits

Working in confined space lacking oxygen; dangerous work; working under impact of dust, noise and heat.

64

Operating washing and screening equipment; peat rotary drum drying system.

Working in frequent contact with heat, dust, CO and other toxic chemicals.

No.

Occupation or work

Working conditions

Class-VI working conditions

1

Working on the top of the coke oven

Working on the top of the oven with very high temperature; arduous and dangerous work

Class-V working conditions

1

Driving hot coke stopping cars

^{Working at height under the impact of very high temperature, CO}2^{, CO and dust; dangerous work}

2

Hot repair of coke ovens

Manual, arduous and dangerous work; working under impact of very high temperature and in direct contact with CO and dust

3

Monitoring coke oven temperature

Working near the coke oven; very hot; dangerous; working under impact of CO and dust

4

Driving coke pushing and quenching cars

^{Working in frequent contact with high temperature and under impact of CO, CO}2

5

Driving coal loading cars on the coke oven top

^{Working on the top of the coke oven with very high temperature; dangerous work; under impact of CO}2 ^{and CO, and dust with very high content.}

6

Ferrous metallurgy

^{Arduous work; working under impact of very high temperature, noise, CO, CO}2 ^{and dust with very high content}

7

Steel ingot casting

Dangerous work with high risk of fire and burn injuries; working under impact of heat, noise, CO and ^CO2

8

Wall working, building steel furnaces

Arduous work; working in confined space and under impact of dust, noise and tremor

9

Producing electric arcs;

Working in frequent contact with heat, noise, dust with high content and toxic chemicals, ^{CO, CO}2^{, Brai in excess of permissible limits}

10

Hot rolling of steel

Arduous work; working under impact of high-level heat, dust and noise

11

Steelmaking by electric arc furnaces, open-hearth furnaces (above 1 ton)

^{Arduous work; working under impact of very high temperature, dust, noise, CO and CO2}

12

Aluminum casting, hot rolling of aluminum

Arduous work; working under impact of heat and noise in excess of permissible limits

13

Arc welding in holds of ships and barges

Working in confined, wet and dirty space lacking oxygen; static working posture; working under impact of ^{CO, CO}2^{, MnO}2 ^{and noise}

14

Welding in steam boiler trucks

Working in confined space lacking light and oxygen; static working posture; working under impact of welding gas, electric arc flash, ^{CO, CO}2

15

Removing rust in holds of ships and barges

Working in confined, wet and dirty space lacking light and oxygen; static working posture; working under impact of high-content dust and violent tremor

16

Sandblasting for removing rust from ship hulls

Arduous work; working outdoor and under impact of noise, tremor and dust of very high content.

17

Removing burrs by compressed air

Arduous work; working under continuous impact of dust, noise and tremor in excess of permissible limits.

18

Smelting lead alloys, tin for casting axle box brass, and railway locomotive parts

Arduous work; working under impact of thermal radiation and lead vapor in excess of permissible limits

19

Corrosion-resistant coating in holds of ships and barges

Working in confined space lacking light and oxygen; static working posture; working under impact of ^CO2^{, toluene and other chemicals contained in paint}

20

Burning grinding stones

^{Manual and arduous work; working under impact of heat, CO, CO}2

21

Refining corundum for production of grinding stones

Arduous work; working under impact of high temperature, dust, noise and CO

22

Smelting lead alloys, tin for casting railroad car parts.

Arduous work; working under impact of thermal radiation and lead vapor in excess of permissible limits

23

Smelting and casting aluminum and copper for rolling electrical wire

Arduous work; static working posture; working under impact of heat and toxic gases or vapors

24

Smelting antimony by reverberatory furnace

^{Working under impact of high temperature, and in contact with As, CO, SiO}2^{, Sb.}

25

Smelting or refining tin containing arsenic by reverberatory furnace

^{Working in frequent contact with high temperature, As, CO, SiO2, Sb.}

26

Removing arsenic and sulfur from tin and antimony ores

^{Working in frequent contact with high temperature, As, CO, SiO2, lead and Sb.}

27

Lead ore refining

^{Working under impact of high temperature, and in contact with As, CO, SiO2, lead and Sb.}

28

Flotation of non-ferrous metal ores, hydrometallurgy (separating, leaching, etc.)

^{Working in frequent contact with toxic chemicals, including H}2^SO4^{, CuSO}4^{, ZnSO}4^{, Clo and} Sb.

29

Smelting and refining ZnO into powder by reverberatory furnace or rotary furnace

Working in frequent contact with high temperature, Pb, CO and ZnO.

30

Operating and repairing non-ferrous metal dust collectors in ZnO electrostatic precipitator.

Working in frequent contact with high temperature and lead vapor

31

Melting and pouring metal.

Arduous and dangerous work; working under impact of heat and toxic gases or vapors

32

Continuous burning and casting of steel billets or slabs

Arduous work; working under impact of heat, noise and dust

33

Opencast mining of non-ferrous metal and chromium ores

Manual and extremely arduous work; static working posture; lacking oxygen; working in frequent contact with toxic dust

34

Operating non-ferrous metal grinder and mixer

eWorking under impact of noise and toxic dust in excess of permissible limits.

35

Gravity concentration of non-ferrous metal and chromium ores

Manual work; working under impact of arsenic and metal oxides

36

Operating bridge cranes in non-ferrous metal and ore dressing and refining plants

Working under impact of high temperature, dust, toxic gases and vapors.

37

Packaging and handling ores and non-ferrous metal products

Manual and extremely arduous work; muddy workplace; working under impact of toxic substances

38

Manual processing of non-ferrous metal ores

Manual and arduous work; working in frequent contact with toxic substances such as arsenic, lead, etc.

39

Working on cast iron/steel foundry floors

Arduous and dangerous work; working under impact of high temperature and dust

40

Working in front of cast iron, steel or coke furnaces

Arduous and extremely dangerous work; working under impact of heat, dust and toxic gases and vapors

41

Operating air collection system of coking plant

Working under impact of high temperature, toxic gases and vapors, and dust in excess of permissible limits.

42

Distilling coke oil and products obtained from coking process

Working in frequent contact with heat and chemicals posing risks of occupational skin diseases.

43

Treating blast-furnace slag

Arduous and dangerous work; working under impact of heat and dust in excess of permissible limits

44

Operating and repairing cast iron melting furnaces

^{Extremely arduous work; working under impact of high temperature, dust, CO and CO}2^.

45

Drying moulds

Extremely arduous work; working under impact of high temperature, toxic gases and vapors

Class-IV working conditions

1

Driving charging cranes in steelmaking

Working at height and under impact of heat, noise, dust mixture, manganese dust and CO

2

Grinding, sieving and mixing wall materials for steel furnace

Arduous work; working in frequent contact with noise and dust with high content.

3

Building table moulds for casting steel

Working under impact of heat, noise and very high-content dust; manual and arduous work

4

Driving steel roll forming machine

^{Working in frequent contact with heat, noise, CO and CO}2

5

Operating ore crushing and screening machine

^{Arduous work; working under impact of loud noise and MnO}2

6

Driving cranes in steel roll forming chamber

Working under impact of heat, noise and tremor

7

Driving cranes in processing of materials used in ferrous metallurgy

Working in frequent contact with dust, tremor and loud noise

8

Degating when pouring molten steel into molds

Working in confined space and under impact of heat, dust and loud noise

9

Removing hot slag from steel furnace

^{Very dusty and hot workplace; working under the impact of noise, CO and CO}2

10

Technological testing of rolled steel

^{Working in frequent contact with noise, heat, CO and CO}2

11

Classifying steel scraps used as charge materials in steelmaking

Working in confined and dirty space, and under impact of noise and very high-content dust

12

Operating electrical systems of furnaces for steelmaking and ferrous metallurgy

^{Working under impact of heat, dust, noise, CO and CO2}

13

Drying steel pouring ladles

^{Manual and arduous work; working under impact of heat, noise, CO and CO2}

14

Operating coke oven gas blowers

Working in frequent contact with heat, dust, CO and loud noise

15

Feeding coking coal to conveyor belt

Arduous work; working under impact of noise and high-content  dust

16

Operating coking coal conveyor belt of coke oven

Constantly moving; working in frequent contact with noise and high-content dust

17

Operating coking coal crushers and mixers

Manual and arduous work; working under impact of noise and high-content  dust

18

Operating coke conveyor belt

^{Working in frequent contact with high temperature, dust, CO and CO2}

19

Annealing metal with use of chemicals

^{Arduous work; working under impact of very high temperature, thermal radiation, CO, CO2, SO2 and loud noise}

20

Arc welding in long barrels

^{Arduous work; working under impact of CO}2^{, Mn, welding gases and arc flash}

21

Welding ship hulls

^{Working outdoor; static working posture; working under impact of CO}2^{, welding gases and arc flash}

22

Manual welding for railroad car wheel rims

Working under impact of welding gases, arc flash and lead vapor

23

Manually removing rust from boilers, locomotives and railroad cars

Static working posture; working under impact of high-content dust and noise in excess of permissible limits.

24

Removing rust from ships

Working outdoor; static working posture; working under impact of loud noise and dust in excess of permissible limits.

25

Removing rust by hand-held machine

Working under impact of loud noise, tremor and high-content dust

26

Fitting train wheel tires

Working with magnetic fields; arduous and hazardous work; under impact of noise

27

Painting ship hulls

Working outdoor; static working posture; working under impact of toxic substances included in paint and toluene

28

Painting railroad cars

Working in frequent contact with toxic substances

29

Bending hot corrugated iron of a thickness of 4mm or more

^{Arduous work; working under impact of heat, thermal radiation, CO2, and loud noise}

30

Cold repair of locomotives and railroad cars

Arduous work; static working posture; working in contact with, loud noise, dust and lubricants

31

Galvanizing 

^{Working under impact of toxic gases such as HCl, NH}3^{, NH}4^{OH, NH}4^Cl, ZnO and lead

32

Examining and repairing railroad cars

Working outdoor; arduous work; static working posture; dirty workplace with dust and noise

33

Lathing railroad car wheel rims

Arduous work; static working posture; working under impact of loud noise

34

Manufacturing and assembling mechanical grates

Manual and arduous work; working under impact of thermal radiation, and loud noise.

35

Hot piercing and forging

Arduous work; working under impact of thermal radiation, and loud noise.

36

Forging machine hammers of 350 kg or more

Arduous work; working under heat and loud noise

37

Repairing river-going ship engines (in docks)

Arduous work; hot and wet workplace; working in frequent contact with lubricants

38

Operating electrical system of corundum furnace in production of grinding wheels

Working under heat, dust and noise

39

Crushing and sieving corundum used in production of grinding wheels

Arduous and hazardous work; working under impact of loud noise, and dust in excess of permissible limits.

40

Mixing materials for pressing grinding wheels and shims

Arduous work; working under impact of loud noise and dust in excess of permissible limits

41

Lathing grinding wheels

Arduous work; static working posture; working under impact of loud noise and high-content dust

42

Washing and drying grinding grains

Manual, arduous work; wet workplace; working under impact of dust, noise and SO3.

43

Separating iron, sieving and classifying grinding wheels

Working in frequent contact with loud noise and dust in excess of permissible limits

44

Breaking up blocks of corundum, preparing corundum furnace

Manual and arduous work; working under impact of noise and very high-content dust

45

Producing grinding wheel adhesive

Manual and arduous work; working under impact of noise and very high-content dust

46

Honing grinding wheels by machine, by hand

Arduous work; working under impact of dust, noise and tremor in excess of permissible limits.

47

Testing grinding wheel speed

Manual and arduous work; working under impact of dust and noise.

48

Manual forging

Manual and arduous work; working under impact of heat, dust and CO.

49

Manual painting

Static working posture; working in frequent contact with toxic substances in paint

50

Metal and cyanide plating

Arduous work; working in contact with lead vapor

51

Painting and drying silicon steel core

Working in contact with heat and paint thinners

52

Arc welding, gas welding

Working in contact with heat and toxic gases and vapors

53

Dry grinding of metals

Working in contact with rock dust, metal dust, tremor and noise

54

Applying mastic and spray-painting engine blocks

Arduous work; working under impact of dust, paint thinners and petrol vapor

55

Hammer cast iron by hand

Arduous work; working in direct contact with cast iron dust

56

Mixing sand and clay for making moulds

Arduous work; working in direct contact with heat and dust

57

Breaking moulds

Arduous work; working under impact of heat, dust and tremor

58

Sieving sand used for making moulds by machine

Arduous work; working under impact of dust and noise; static working posture

59

Bakelite injection molding

Working in contact with heat, dust, toxic gases and vapors

60

Drying mould and cores by coal stoves

Arduous work; working in direct contact with heat, dust, toxic gases and vapors

61

Operating metal punching machines.

Working under impact of heat, noise and tremor; optical strain.

62

Operating cranes in mechanical casting workshops

Working under impact of heat and dust; stressful work

63

Lathing cast iron and rubber rollers of rice huskers

Arduous work; working under impact of cast iron dust and rubber dust

64

Drawing copper and aluminum wires

Arduous work; working in contact with loud noise

65

Heating, pressing and shaping copper and aluminum

Arduous work; working under impact of noise and toxic gases or vapors

66

Applying insulation coating and paint to electric wires

Arduous work; working under impact of noise and toxic gases or vapors

67

Granulating PVC, PP, PE.

Arduous work; working in contact with noise, dust, toxic gases and vapors

68

Covering electric wires with PVC, PP, PE.

Working under frequent impact of heat, toxic gases and vapors.

69

Smelting and casting cast iron in mechanical workshops

Arduous and dangerous work; working under impact of heat and dust

70

Cleaning casting objects

Arduous work; working under impact of heat, dust and noise

71

Die casting of metals (aluminum, copper)

Arduous work; working under impact of heat and dust

72

Soldering pesticide tanks

working under impact of heat and pesticides; static working posture

73

Drawing and rolling steel wires

Arduous work; working under impact of heat, dust and noise

74

Sampling, assaying and analysis of metal ores and products

Working in frequent contact with heat, dust, As, CO, Mg.

75

Preserving, loading/unloading and packing non-ferrous metal ores and products

Arduous work; working in contact with As, Pb, SiO₂, ZnO, Mg and Sb.

76

Mechanical and electrical repairs of tin, ZnO and Sb processing lines; magnetic separation, flotation

Working in frequent contact with heat, dust and toxic substances; static working posture

77

Drying and bagging chromium ore

^{Arduous work; working in contact with heat, chromium and SiO}2^.

78

Manual extraction of non-ferrous metal ores

Working outdoor; manual and arduous work; working in contact with heat and dust

79

Dipping lineman’s pliers into xylene

Working in contact with heat, xylene, crude oil and petrol

80

Pressing lineman’s pliers

Working in contact with heat and toxic gases and vapors

81

Keeping, delivering and receiving non-ferrous metal ores and products

Arduous work; working under impact of toxic dust

82

Protecting ore and chromium mining sites

Constantly moving; working under impact of noise and dust

83

Directly providing production guidance in extraction, dressing and refining of non-ferrous metals and chromium ores

Working under frequent impact of noise, dust, toxic gases and vapors.

84

Repairing and maintaining equipment used in extraction, dressing and refining of non-ferrous metals

Arduous work; static working posture; working under impact of noise and dust factors

85

Doing industrial cleaning job in non-ferrous metal ore dressing and refining workshops/plants

Manual and arduous work; working under impact of dust, noise, toxic gases and vapors

86

Operating heavy-duty fans/blowers of blast furnaces and coke ovens

Working under impact of high temperature, dust and toxic gases 

87

Operating cast iron material handling cars

Working under frequent impact of dust, toxic gases.

88

Burning hot-blast furnaces

Arduous work; working under impact of high temperature and dust

89

Producing slag wool and slag granules

Arduous work; working under impact of heat and very high-content dust

90

Keeping coke oil warehouse

Working under impact of heat, toxic gases and vapors.

91

Feeding blast furnaces

^{Arduous and dangerous work; working under impact of dust, CO and CO2.}

92

Monitoring water of blast furnaces

^{Constantly moving; working under impact of high temperature, CO and CO}2

93

Operating conveyor belts to feed coke and sintering

Constantly moving; working in confined space and under impact of high-content dust

94

Monitoring coke annealing system (commutation)

Working under impact of high temperature, dust   

95

Operating and repairing flow meters

Working in contact with high temperature, dust and mercury

96

Sintering frits

Working under impact of heat and high-content dust

97

Repairing, lubricating and maintaining metallurgical equipment

Arduous work; static working posture; working in contact with heat and dust

98

Operating sintering machines and valves

^{Extremely arduous work; working in contact with high temperature, CO, CO}2^.

99

Pumping water for quenching of coke

Arduous work; working in contact with heat and very high-content dust

100

Drying and classifying ores

Arduous work; working in contact with heat and dust

101

Operating mud crushers for refining and casting cast iron and steel

Arduous work; muddy and wet workplace; working under impact of noise and tremor.

102

Operating funnels of sintered products

Working under impact of heat and high-content dust

103

Operating sintered ore dust filtering machine

Working under impact of heat and very high-content dust

104

Directly providing technical guidance in cast iron and steel refining, and steel rolling

^{Working in frequent contact with high temperature, dust, CO and CO2}

105

Working on cold roll floor, cutting and binding rolled steel

Arduous work; working under impact of heat and dust

106

Producing and repairing steel wire drawing die

Arduous work; static working posture; working in frequent contact with heat and dust

107

Repairing pipelines for coal gas, compressed air, and water pipelines of metallurgical plants

Arduous and dangerous work; static working posture; working under impact of dust and heat

108

Doing industrial cleaning job at metallurgical plants

Manual and arduous work; working under impact of heat, dust.

109

Crushing and sieving dolomite and lime

Working under impact of tremor, noise, dust

110

Discharging and collecting coal

Manual and arduous work; working under impact of very high-content dust

111

Keeping coke oil warehouse

Arduous work; working in frequent contact with hot and toxic coke oil vapors

112

Maintain metal wares

Manual and arduous work; working in frequent contact with lubricants

113

Operating building powder crushing and sieving machines

Working under impact of noise, tremor and very high-content dust

114

Operating grinding and filing machines

Static working posture; working under impact of noise, and dust

115

Annealing metal by high-frequency induction furnace

Arduous work; working under impact of heat and dust

116

Operating machines to cut workpieces and shape tips and handles of metal files

Arduous works; working under impact of noise and tremor

117

Heating metals by mid- frequency induction furnace

Arduous work; working under frequent impact of high temperature

118

Firing and operating metal annealing furnaces

Arduous work; working under frequent impact of high temperature CO ^{and CO}2^.

119

Washing and using chemicals to blacken metals and metal products

Working in frequent contact with acids, soda, etc.

120

Nickel and chrome plating

Working in frequent contact with toxic chemicals

121

Rubbing, removing rust and polishing metals

Static working posture; working in frequent impact of noise and high-content dust.

122

Operating metal forming, filing and ball-grinding machines

Working in frequent contact with tremor, noise and toxic chemicals

123

Operating metal turning machine and ball-polishing machine

Arduous work; working in frequent contact with noise and dust

124

Grinding ball grinding wheels

Arduous work; working under impact of dust and noise

125

Lead casting for assembling ball grinding wheels

Working in frequent contact with heat, and lead vapor

126

Selecting metal balls (of less than 1 cm in diameter) visually

Arduous and monotonous work; optical strain; static working posture

127

Fusion welding

Arduous work; static working posture; working under impact of heat and dust

128

High-pressure welding

Static working posture; working under impact of heat, and toxic gases

129

Cold repair of motor vehicles of at least 10 tonnes and tracked vehicles

Arduous work; static working posture; working in frequent contact with lubricants

130

Doing industrial cleaning job at mechanical plants

Manual and arduous work; working in frequent contact with dust and chemicals

131

Drilling, planning and lathing cast iron

Dust; optical strain; paying high attention

132

Lathing, milling, planning, and sawing fiber and Bakelite sheets

Working under impact of fiber and Bakelite dust, high-concentration phenol vapor

133

Electrostatic painting.

Working in frequent contact with toxic chemicals; hot workplace lacking oxygen.

134

Operating machine hammers.

Working under impact of high temperature, tremor and noise in excess of permissible limits

No.

Occupation or work

Working conditions

Class-VI working conditions

1

Making superphosphate

Working on high floor and in contact with toxic chemicals (HF, SO₃) of  high concentration posing chemical poisoning risk; dangerous work.

2

Soldering in close boxes or towers

Working in confined space; static working posture; working under impact of heat and lead vapor of very high concentration

3

Producing pesticide active ingredients and pesticides of various types

Arduous work; working in contact with highly toxic chemicals

4

Producing and packing yellow phosphorus (P₄).

Working at height, adjacent to hot kilns, in direct contact with dust (of quartzite, apatite, coke), toxic gases (CO, P₂O₅, PH₃, HF, P₄...), noise; facing high risk of poisoning and explosion. 

Class-V working conditions

1

Producing and packing Na₂SiFe

Arduous works; working in frequent contact with toxic gas (HF), noise, and high-concentration dust.   

2

Crushing apatite ore, pyrite ore; packing apatite powder

Working in frequent contact with dust and noise in excess of permissible limits

3

Operating and pyrite ore to fluidized-bed furnace for producing H₂SO₄.

Working on a high floor adjacent to the furnace, and in direct contact with dust, noise and SO₂ of high concentration

4

Operating H₂SO₄ filling and sealing machine

Working in frequent contact with toxic chemicals and noise

5

^{Filtering electric dust in production of H}2^SO4

Working in frequent contact with dust, toxic chemicals and loud noise

6

Producing batteries: regenerating lead; grinding and casting lead; mixing and coating lead; cutting, grinding and drying lead plates; welding extreme beams; making lead plates; assembling batteries.

Working in direct contact with noise, heat and lead dust of very high concentration

7

Grinding pozzolan powder

Arduous work; working under impact of loud noise and dust in excess of permissible limits.

8

Making calcium carbide

^{Manual and arduous work; working under impact of heat, noise, CO2, CO and very high-concentration dust}

9

Refining rubber

^{Arduous and hazardous work; working in contact with high temperature, dust, SO}2^{, H}2^S

10

Operating coal gasification furnace in nitrogenous fertilizer production

Working on a high floor; arduous ^{and hazardous work; working in contact with CO in excess of permissible limits}

11

Repairing coal gasification furnace in nitrogenous fertilizer production

Arduous and dangerous work; static working posture; working in contact with CO

12

Synthesizing ammonia (NH3) in nitrogenous fertilizer production

^{Hazardous and dangerous work; working in frequent contact with NH}3 ^{of high concentration}

13

Operating high-pressure compressor in nitrogenous fertilizer production

^{Arduous work; working in contact with noise and NH}3 ^{of high concentration}

14

Operating mid-pressure and high-pressure ammonia pumps and decomposing urea

^{Dangerous and stressful work; working in contact with NH}3

15

Condensing, granulating and concentrating urea

^{Working in contact with toxic chemicals}

16

^{Producing salicylic acid, HNO}3^{, H}3^PO4^.

Working in frequent contact with various types of toxic chemicals.

17

Neutralizing superphosphate

Working in frequent contact with dust and highly toxic chemicals

18

Operating wet scrubber

^{Hazardous work; working in frequent contact with SO}2^{, SO}3 ^{and H}2^SO4^.

19

^{Drying absorption of SO}2 ^{and SO}3 in production of sulfur dioxide (^SO2)^.

^{Working in frequent contact with H}2^SO4^{, SO}3^.

20

^{Operating contact equipment in production of H}2^SO4^.

^{Working in contact with SO}2^{, SO}3^.

21

Making iron oxides in superphosphate production area

^{Working in contact with heat, dust, Fe}2^SO3 ^{and toxic chemicals}

22

^{Extracting H}3^PO4 ^{from superphosphate}

Working in contact with dust and fluorine compounds

23

Operating winches for feeding raw materials to the blast furnace in production of calcium magnesium phosphate fertilizer

^{Hazardous work; working in contact with CO, CO}2^{, H}2^S.

24

Discharging raw materials from the blast furnace in production of calcium magnesium phosphate fertilizer

Working in contact with CO, fluoride and high temperature

25

Operating the tower system for collection of waste gases from the blast furnace in production of calcium magnesium phosphate fertilizer

Working in contact with toxic gases ^{HF, SiF}4^{, lime, blast furnace slag}

26

Operating hot-blast stove in production of calcium magnesium phosphate fertilizer

Arduous work; working in contact with toxic gases and high temperature

27

Producing pesticide additives

^{Working under impact of toxic dust, SiO}2 ^{and metal oxides}

28

Liquefying and bottling chlorine; producing pure HCl.

Working in contact with highly toxic HCl and chlorine

29

Handling excessive chlorine

Hazardous work; working in contact with highly toxic chlorine

30

Grinding, sieving, drying and processing electrode coating flux materials

^{Arduous work; working in contact with heat, SiO}2 ^{dust, silicon and highly toxic substance Na}2^SiF6^…

31

Weighing raw mixtures; dry mixing of electrode coating flux.

Working in contact with toxic chemicals

32

Drying, grinding and bagging manganese ores

Working in contact with heat, noise and high-concentration manganese dust

33

Operating chain conveyors and rubber conveyor belts in the basement of the apatite processing plant.

Working underground in a wet place lacking light and oxygen, and under impact of noise and high-concentration dust

34

Operating GHIT sieving machine in the apatite processing plant.

Working underground in a wet place, and under impact of noise and dust.

35

Operating jaw crusher, hammer crusher in the basement of the apatite processing plant

Working underground in a wet place, and under impact of loud noise and dust.

36

Operating mud pumps underground

Working underground in a muddy and wet space lacking light; extremely arduous work; static working posture.

37

Soldering in chemical production

Working in contact with high-concentration lead vapor

38

Repairing furnaces and towers in chemical production

Working in confined space; arduous work; static working posture; working under impact of high temperature and strong chemicals

39

Manually loading and transporting black coal

Manual and arduous work; working in contact with coal dust (respirable dusts) of very high concentration

40

Repairing and dredging underground sewers in chemical plants

Manual and extremely arduous work; static working posture; working in frequent contact with waste and toxic chemicals

41

Producing chromium compounds

Working in frequent contact with highly toxic chemicals

42

Operating sewage pumping stations (oil-contaminated waste, contaminated waste); circulating water pump and wastewater treatment station

Frequently working at a depth of -10 m to -20 m, and in contact with noise, toxic waste, disease-causing microorganisms, and water treatment chemicals.

43

Repairing and operating equipment (water treatment, desalination, operation team leader)

Working in frequent contact with dust, toxic chemicals and noise

44

^{Producing liquid and solid CO2.}

^{Working in frequent contact with noise and chemicals (liquid and solid CO2 of high concentrations; potassium; H2S) and high-pressure CO2 compressor.}

45

Recovering, filtering and regenerating lubricating oil

Manual work; working in contact with toxic chemicals and loud noise, and under direct impact of hot oil vapor and steam

46

Removing hot slag from heat boiler

Manual and arduous work; working in frequent contact with great heat, coal ash dust and toxic gases and vapors

47

^{Keeping warehouses of pressure vessels (cylinders) (containing O}2^{, N}2^{, liquid CO}2^{, liquid NH}3^).

Working in frequent contact with cylinders containing high-pressure, flammable, explosive and dangerous gas, and under impact of toxic chemical vapors

48

Manually collecting coal in slag dump of coal gasification furnace

Working outdoor; manual and arduous work; working under impact of heat, coal ash dust and mixtures of steam, CO, H2S.

49

Extraction and transporting peat.

Working outdoor on peat sedimentation basins; manual and arduous work; working under direct impact of temperature, moisture, coal ash dust and mixtures of steam, ^{CO, CO}2^{, NH}3^{, H}2^S.

50

Operating the system for capturing heat from coal gasification process

Frequently working in the environment of high temperature, loud noise; and in contact with high-pressure equipment that generates toxic gases and vapors, including ^{CO, CO}2^{, NH}3^{, H}2^S.

51

^{Producing and bagging Al(OH)}3^.

Working in frequent contact with toxic chemical NaOH, moisture and dust at high temperature

52

Operating conveyor belts to supply sulfur; operating sulfur burners to produce H₂SO₄.

^{Working in frequent contact with heat, noise and high-concentration SO}2^{, H}2^S.

53

Operating cranes to mix superphosphate

^{Working in frequent contact with dust, noise and very high-concentration fluorine and H2S.}

54

^{Producing ZnCl}2^.

^{Working in frequent contact with} high temperatures,  CO, HCl, H2S

55

^{Producing and bagging Na}2^SiF6^.

Arduous works; working in frequent contact with toxic gas (HF), noise, and high-concentration dust.   

Class-IV working conditions

1

Crushing lime and coal to make calcium carbide; packaging calcium carbide

Manual and arduous work; working in frequent contact with noise and dust in excess of permissible limits

2

Operating boilers

Arduous work; working in contact with dust, noise and heat

3

Operating drying ovens of apatite and pyrite ores.

Arduous work; working in contact with dust, noise and heat

4

Operating conveyor belts of pyrite, apatite, sulfur and coal ores, and acid products

Working in frequent contact with noise and high-concentration ore dust

5

Driving cranes to move apatite and pyrite ores

Working under impact of noise and high-concentration of ore dust

6

Grinding additives used in NPK fertilizer production

Arduous work; working under impact of noise and dust in excess of permissible limits

7

Drying, granulating/pelletizing and bagging NPK fertilizer

^{Working in frequent contact with heat, dust and NH}3

8

Bagging, bag sealing and loading superphosphate

^{Manual and arduous work; working under impact of dust, SO3, HF}

9

Rolling PVC, PP, PE thin films

Working in contact with gasoline vapor, heat and toxic plastic substances

10

Pressure pressing and forming rubber products

Arduous work; working in contact with heat, dust, noise and gasoline vapors

11

Calendaring and embossing rubber cloth

^{Working under impact of noise, gasoline and SO}2

12

Handling tire-hoop in production of tires of various types

Working in frequent contact with dust, gasoline and highly toxic substances such as xylene

13

Operating electrical system of calcium carbide furnace

Working in frequent contact with noise and high-concentration dust

14

Classifying lead plates used in battery production

Manual work; working under impact of noise and lead dust

15

Sieving and drying chemicals and rubber blends

Working in contact with high temperature, dust and toxic chemicals

16

Recycling reclaimed rubber

Arduous work; working in contact with coal dust and toxic chemicals

17

Vulcanizing rubber products

Arduous work; working in contact with toxic chemicals

18

Making industrial conveyor belts

Arduous work; working in contact with organic solvents (benzene) and toxic chemicals

19

Pressure pressing and forming tires and inner tubes of cars, airplanes and tractors

Arduous work; working in contact with high temperature, chemicals and organic solvents

20

Synthesizing alkyds used in paints

Working in contact with phenol, benzene, and xylene

21

Smelting and rolling zinc in battery production.

Working in contact with high temperature and zinc dust

22

Operating carbon rod furnaces in battery production.

Working in contact with high temperature, organic solvents and dust

23

Mixing anode powder in battery production.

Working in contact with electrolytes and dust

24

Mixing powder to press carbon rods in battery production.

Working in contact with high temperature and coal dust

25

Producing C2H2 and acetylene soot

Hazardous work; working in contact with toxic gases and coal dust

26

Operating condensate pumps in apatite processing.

Working in a wet space and in contact with acids and acid salts.

27

Operating pumps to supply acids and contact drums in apatite processing.

Working in contact with strong and very high-concentration acids

28

Regenerating solutions of copper.

Working in contact with strong inorganic acids

29

Producing ammonium carbonate.

Working in contact with strong acid (HCl) and ^Cl2^.

30

Operating wet scrubbers with solutions of copper, alkali in nitrogenous fertilizer production

Working in contact with soda and corrosive solutions of organic salts

31

Bottling materials, gaseous and liquid products in chemical industry

^{Working with toxic chemicals: C}2^H2^{, NH}3^{, CO}2^.

32

Bagging and loading urea.

^{Arduous work; working in contact with dust and NH}3^.

33

Producing activated carbon. 

^{Working in frequent contact with NH}3^.

34

Producing barium carbonate ^(BaCO3^).

^{Arduous work; working in contact with dust and H}2^SO4^.

35

Producing sulfide salts.

^{Working in contact with concentrated H}2^SO4.

36

Producing tripoly.

^{Working in contact with dust and H}3^PO4^.

37

Producing purified water for use in chemical production

Working at a wet place and in contact with chlorine and bleach.

38

Operating cranes or machines to collect semi-finished products of calcium magnesium phosphate fertilizer.

Working at a wet place and in contact with dust and highly toxic chemicals (HF)

39

Feeding blast furnaces in production of calcium magnesium phosphate fertilizer

^{Working in contact with fossil coal dust, CO, H}2^{S, CO}2 at high temperature.

40

Operating conveyor belts that carrying semi-finished products of calcium magnesium phosphate fertilizer

Constantly moving; working in contact with noise and very high-concentration dust

41

Operating high-pressure fans and blast furnaces in production of calcium magnesium phosphate fertilizer

Working under impact of tremor, noise, dust

42

Checking blast furnaces in production of calcium magnesium phosphate fertilizer

Working under impact of high temperature, and in contact with CO, chlorine, HF.

43

Operating cranes to feed dryers

Working in contact with high temperature and dust

44

Operating rotary dryers in production of phosphate fertilizer

Working in contact with high temperature and dust.

45

Operating finished phosphate fertilizer crushers

Working in contact with dust and noise

46

Operating furnaces to provide heat for dryers.

Working in contact with heat, dust, and CO.

47

Operating conveyor belts that carrying finished phosphate fertilizer products.

Working in contact with dust and noise

48

Operating phosphate fertilizer bagging machines

Arduous work; working under impact of very high-concentration dust and noise

49

Loading and transporting phosphate fertilizer bags.

Manual and extremely arduous work; working under impact of dust

50

Operating ore material crushers for producing phosphate fertilizer.

Arduous work; working under impact of dust and noise

51

Operating conveyor belts in phosphate fertilizer production line.

Working in frequent contact with dust and noise

52

Operating equipment to sieve and filter dry or wet materials in chemical production

Working at a wet place and in contact with dust and noise

53

Washing, screening and transporting coal used in production of chemical fertilizer production

Arduous work; working under impact of dust 

54

Transporting blast furnace dust in the production of calcium magnesium phosphate fertilizer

Arduous work; working in contact with dust, toxic gases from blast furnace smoke

55

Pressing fine apatite ore and coal dust used in phosphate fertilizer production

Working outdoor; arduous work; working in contact with dust

56

Electrolyzing NaCl solution to produce NaOH

Working with chlorine and saturated solutions

57

Condensing NaOH.

Working in contact with caustic soda.

58

Repairing electrolytic tanks in NaOH production.

Working in contact with NaOH and acids

59

Producing alum.

^{Working in contact with dust, H}2^SO4^{, SO}2 and ^SO3^.

60

Wet mixing and pressing electrode coating flux.

^{Working in contact with fine MnO2 and SiO2 particles.}

61

Drying welding electrodes in electric ovens

Working in contact with high temperature and fri dust.

62

Processing and cleaning surfaces of welding electrode cores.

Working in frequent contact with iron dust and acids

63

Crushing, rolling, stirring, mixing and canning paint.

Working in contact with phenol, xylene, benzene, chrome oxide, iron, and zinc

64

Melting waxes in battery production.

Working in hot, flammable and hazardous environment.

65

Washing and screening manganese by gravity method in battery production.

Arduous work; working in direct contact with manganese dust.

66

Operating manganese ore crushing and screening machines

Arduous work; working in contact with dust and noise.

67

Cutting cloth, gluing pipes, tires of airplanes, tractors, motorbikes, and cars.

Working in contact with gasoline and organic solvents

68

Producing high-pressure rubber pipes

Arduous work; working in contact with catalysts and sulfur

69

Engraving type moulds

Working under impact of metal dust and noise

70

^{Producing CaCO}3 powder

^{Working in contact with SiO}2 ^{dust and lime.}

71

Operating chain conveyors and rubber conveyor belts in apatite ore processing.

Working under impact of tremor, noise, dust

72

Operating wet-sieve shaker in apatite ore processing.

Working in a wet place and under impact of tremor and noise

73

Operating crushers in apatite ore sorting.

Working in a wet place and under impact of tremor, dust and noise

74

Operating machines for supplying reagents for apatite ore processing.

Working in frequent contact with toxic chemicals

75

Preparing reagents for flotation of apatite ore.

Working in frequent contact with toxic chemicals

76

Operating apatite ore filtration system.

Working in contact with organic solvents and acids.

77

Operating apatite ore drying system.

Working under impact of high temperature, dust and noise   

78

Producing PVC pipes

Working in contact with heat, dust, toxic gases and vapors

79

Operating PP and PE bag weaving machines

Standing throughout the shift; working under impact of noise, tremor and dust

80

Operating boilers in chemical production

Working in contact with dust and fumes from materials, oil, grease and high temperature

81

Operating air compressors in chemical production

Working under impact of noise, tremor and chemicals

82

Mechanical and electrical repairs in chemical production line.

Working with toxic chemicals; static working posture.

83

Anti-corrosion coating in chemical production line.

Static working posture; working in frequent contact with toxic chemicals

84

Repairing measuring devices in chemical production.

Working with toxic chemicals; static working posture.

85

Operating acid and base pumps in chemical production.

Working in contact with toxic acid and bases

86

Doing industrial cleaning job at chemical plants

Working with toxic chemicals; manual and arduous work.

87

Directly providing technical guidance in chemical production line.

Processing complicated works; working under impact of noise, dust and toxic chemicals.

88

Producing pure chemicals

Manual and arduous work; working with toxic chemicals.

89

Operating machines for ore flotation

Working under impact of noise and tremor

90

Operating ore flotation reagent feeding machine.

Working in contact with organic solvents and acids.

91

Producing soap cream and soap powder.

Working in frequent contact with chemicals and toxic dust.

92

Sampling, analyzing the quality of ingredients, semi-finished products, and finished products in production lines of chemicals and chemical products, etc.

Working in frequent contact with toxic chemicals, noise and dust.

93

Operating, repairing pressure gauges in chemical production line.

Constantly moving; static working posture; working under impact of dust and toxic chemicals

94

Repairing batteries 

Manual work; working in frequent contact with lead and acids.

95

Testing and checking quality of semi-finished and finished batteries.

Manual work; working in frequent contact with lead vapors and dusts, and acids.

96

Charging batteries in battery production line

Manual work; working in contact with lead vapors and dusts, and acids.

97

Loading and transporting chemicals and chemical products in chemical production.

Manual and arduous work; working in frequent contact with toxic chemicals

98

Operating coal burners in chemical production

Manual work; working in frequent contact with dust, heat and high-concentration ^CO2 ^{and SO}2

99

^{Producing Na}2^SiO3^.

^{Working in frequent contact with high temperature, silica dust and Na2CO3}

100

Producing poly-aluminum chloride (P.A.C); producing CaCl₂

Working in frequent contact with high temperature and HCl.

No.

Occupation or work

Working conditions

Class-VI working conditions

1

Mechanical officers, mechanics, electricians on sea-going vessels and inshore vessels that transport goods, gasoline, oil

Extremely arduous and hazardous work; working in confined space; static working posture; working under impact of heat, tremor and noise.

2

Drivers of specialized trucks with a load of 60 tonnes or more

Arduous and dangerous work; working under impact of dust, noise and tremor.

3

Manually loading in the holds of ships

Extremely arduous work; working in confined space lacking oxygen; static working posture.

Class-V working conditions

1

Officers, crew members, technicians, and mechanics of construction/special-purpose vessels

Regularly living on river, sea; arduous work; working under impact of waves and loud noise, etc.

2

Locomotive drivers

Working on trains; stressful work; working under impact of noise.

3

Drivers of trucks with a payload of 20 tonnes or more

Arduous and dangerous work; working under impact of dust, tremor and loud noise

4

Drivers of loaders or excavators with bucket capacity of at least 4m³

Arduous work; working under impact of loud noise and dust

5

Deck officers, electrical and radio officers, sailors, cooks, attendants, doctors, and chef stewards on sea-going vessels and inshore vessels that transport goods, gasoline, oil.

Arduous and dangerous work; working under impact of wind waves, tremor and noise.

6

Drivers of passenger vehicles with 80 seats or more.

Dangerous and stressful work; working under impact of noise and tremor.

7

Chief mechanics, mechanics of self-propelled ferries, towing boats for ferries and river ships with a power of 90 CV or higher.

Working in confined space and under impact of noise, tremor, heat and in frequent contact with gasoline, oil; static working posture.

8

Producing ship hulls and products from composite materials

Working in contact with toxic chemicals such as butanol, acetone, glass wool, etc.

9

Working on floating docks

Frequently working underground, in confined space lacking oxygen, and under impact of heat and loud noise

10

Diving to check ships, cleaning wharves, placing rollers to launch ships

Manual, dangerous and extremely arduous work; working in frequent contact with pathogenic microorganisms.

11

Train dispatchers

Very complicated and stressful work.

12

Operating gantry cranes

Working at height and under impact of violent tremor; highly unsafe.

13

Operating multi-function cranes.

Working at height and under impact of violent tremor; highly unsafe.

14

Operating wheel-mounted cranes.

Working in dusty and noisy environment with high labor intensity.

15

Operating reach stackers.

Working in dusty and noisy environment with high labor intensity.

16

Operating forklift trucks (used for cargo than containers).

Working in dusty and noisy environment with high labor intensity.

17

Driving trucks in the cargo handling line

Working in dusty and noisy environment with high labor intensity.

18

Manual handling.

Working in dusty and noisy environment with toxic gases and high labor intensity; arduous and dangerous work.

19

Working in Hai Van tunnel (operating machines and devices; fire safety; maintenance, cleaning; ensuring traffic safety, evacuation).

Working under impact of magnetic field due to resonance of electrical equipment; noise, petroleum gas, toxic gases and dust; extreme climate at a height of 127 m above the sea; sewage and detergents while cleaning the tunnel; lacking oxygen; facing high risk of occupational accidents and traffic accidents.

20

Operators of Vietnam Coastal Communication System.

Stressful work; working under impact of noise.

21

Technicians of Vietnam Coastal Communication System.

Stressful work; static working posture; working under impact of noise and electromagnetic field.

22

Seafarers working on ships for search and rescue, and salvage of sunken property, or salvage ships.

Extremely arduous and dangerous work; working under impact of waves, wind and bad weather; stressful work.

23

Supervisors and operators of the Vessel Traffic Service system.

Stressful work; working under impact of noise and ultra-high frequency electromagnetic field.

24

Technicians operating the Vessel Traffic Service system.

Stressful work; static working posture; frequently working on a radar tower with a height of 50m; working under impact of noise and ultra-high frequency electromagnetic field.

25

Seafarers working on public vessels or boats of port authorities.

Extremely arduous and dangerous work; working under impact of waves, wind, tremor and noise; stressful work.

26

Seafarers working on supply ships/boats, ships/boats for inspecting maritime signaling systems, lighthouses and navigational channels, or transporting pilots.

Extremely arduous and dangerous work; working under impact of waves, wind, tremor and noise.

27

Inspecting ships/vessels, hydraulic works, maritime signaling systems.

Dangerous work; working under impact of dust and toxic gases or vapors.

28

Inspecting marine works.

Working offshore, and under impact of waves and wind.

29

Installing, maintaining and repairing marker buoys, maritime marks and signals.

Working outdoor; arduous and dangerous work; working under impact of noise and tremor.

30

Managing and operating maritime signals and marks on navigational channels, estuaries, and along rivers on which waterway transport activities are performed.

Working outdoor; dangerous work; working under impact of waves, wind and tremor.

31

Workers in charge of managing and operating lighthouses.

Working outdoor; dangerous work; working under impact of waves and wind.

32

Scaffolding workers at shipyards

Working at height and in holds of ships (at a depth of 20-30m), carrying heavy loads while climbing. Tottery and dangerous workplace lacking oxygen and lighting; working under impact of dust and heat. Static working posture; confined workplace.

Class-IV working conditions

1

Train dispatchers at centers (Hanoi, Da Nang, Ho Chi Minh City)

Complicated and stressful work.

2

Patrolling workers (railway)

Constantly moving; requiring intense concentration to inspect roads; working outdoor.

3

Feeding coal to steam locomotives

Arduous work; working in contact with dust, noise and heat

4

Driving railcars and trolleys

Constantly moving; working under impact of noise and dust

5

Operating river ship engines

Regularly living on rivers; working under impact of heat and noise, and in contact with oil and grease.

6

Shunting and coupling commanders at large stations (including Ha Noi, Da Nang and Ho Chi Minh City)

Working outdoor and under impact of noise and dust; constantly moving.

7

Kitchen staff and stewards on North-South trains

Working on trains; arduous work; working in confined space and under impact of heat and noise

8

Officers and crew members of river ships with a power of 90 CV or higher

Regularly living on rivers; arduous work; working under impact of waves, wind and noise

9

Cooks on construction/special-purpose vessels

Living on rivers and at sea as seafarers; working in confined space; arduous work

10

Captains of passenger ships and cargo ships

Working on board ships and under impact of noise, tremor and dust; stressful work.

11

Escorting, protecting and delivering goods, luggage, equipment carried on ships

Working on board ships and under impact of noise, tremor and dust.

12

Train dispatchers and traffic controllers at stations

Constantly moving; complicated and stressful work

13

Shunting commanders, coupling workers and train conductors at assembly stations

Working outdoor; arduous work; constantly moving; working under impact of noise and dust

14

Turning railroad switches at assembly stations

Working outdoor; manual and arduous work; working under impact of noise and dust

15

Grade I crossing and road-rail bridge flagmen

Arduous work; working under impact of noise, coal dust and dust mixtures

16

Patrolling railway tunnels

Constantly moving in dark tunnels; requiring intense concentration to inspect tunnels

17

Cleaning stations and cleaning railway wagons at train stations.

Working outdoor and under impact of noise and dust

18

Installing and making major repairs of railway signaling equipment

Working outdoor; arduous work; working under impact of dust

19

Screening and feeding sand to locomotives

Working outdoor; manual and arduous work; working under impact of very high-concentration dust

20

Operating locomotive parts and wagons washers

Arduous work; working in contact with oil, grease and toxic chemicals

21

Assisting in craning and hooking cable

Working outdoor; arduous and dangerous work.

22

Providing meals for workers in charge of making repairs and major repairs of railway

Working outdoor; arduous work; constantly moving; working under impact of heat and dust

23

Captain, vice-captain, sailors on ferries; operating towing boats for ferries

Working under impact of waves, wind, noise, tremor, and in frequent contact with oil and gasoline.

24

Operating wheel-type heavy equipment to build roads.

Arduous work; working under impact of heat, dust and tremor.

25

Driving trucks of from 7 tonnes to under 20 tonnes.

Arduous, stressful, noisy, shaking and dangerous work

26

Driving passenger vehicles with from 40 seats to under 80 seats

A lot of travel; dangerous and stressful work; working under impact of noise and tremor.

27

Directly providing technical guidance on building and repairing of ships at ports

Arduous work; working in confined space; static working posture

28

Producing mastic for wooden hulls of ships

Arduous work; static working posture; working in frequent contact with chemicals.

29

Checking tickets, controlling movement of vehicles at bridge, road, and ferry tollbooths

^{Working under impact of dust, noise, gasoline vapor, toxic gases (CO}2^{, CO…) and seasonal changes in weather}

30

Stopping and guiding vehicles to get on weighing scales at weigh stations

Working outdoor and under impact of dust, noise, ^{gasoline vapor, toxic gases (CO}2^{, CO…)}

31

Repairing cranes, machinery and equipment used for construction at traffic works.

Working outdoor and at height, under impact of changes in weather; static working posture; dangerous work

32

Service crew members (cooking, serving and cleaning railroad cars and berths) on passenger trains

Concurrently doing different duties; hard work; working on trains during day and night. Working under impact of dust, noise, tremor and climate changes by regions in a short time.

33

Directly managing and operating Hai Van tunnel (working at Operation Control Center (OCC)); protecting the ventilation system; cleaners, arborists).

Working under impact of strong magnetic field; noise, petroleum gas, toxic gases; extreme climate at a height of 127 m above the sea; sewage and detergents while cleaning the tunnel; lacking oxygen; dusty and smoky; facing high risk of occupational accidents and traffic accidents.

34

Bridge construction workers

Involving a lot of travel; manual outdoor work; working under impact of dust, noise, toxic gases; facing high risk of occupational accidents and traffic accidents

35

Tollbooth collectors and their assistants.

^{Working under impact of dust, noise, petroleum gas, toxic gases (CO, CO2, etc.); working outdoor; facing high risk of traffic accidents}

36

Painting speed humps and median barriers

Working under impact of dust, noise, petroleum gas, toxic gases; working outdoor; facing high risk of traffic accidents

37

Driving road graders.

Arduous work; working under impact of noise, tremor and dust

38

Refueling locomotives and railroad cars

Hazardous work; working in frequent contact with gasoline, oil and petrochemical products.

39

Operating and controlling railway bridges.

Working in frequent contact with dust and noise in excess of permissible limits

40

Removing rust from metal.

Arduous work; static working posture; working under impact of noise, tremor and high-concentration dust

41

Operating rammers, shakers, punching machines, impact wrenches.

Arduous work; working under impact of noise and violent tremor

42

Producing concrete (concrete sleepers, concrete components, etc.).

Working outdoor; arduous, noisy and dusty work;

43

Repairing and cleaning Thang Long bridge.

Working outdoor and under impact of noise and dust in excess of permissible limits.

44

Flagmen at railroad crossings.

Working outdoor and under impact of noise and dust in excess of permissible limits. Arduous and stressful work; facing high risk of accidents.

45

Ship mechanics

Working in dusty and noisy environment with toxic gases and high labor intensity; arduous and dangerous work.

46

Officers, sailors, and crewmembers on ships.

Working in dusty and noisy environment with toxic gases and high labor intensity; arduous and dangerous work.

47

Repairing chassis and engines of cars and reach stackers.

Working under impact of dust, noise and toxic gases; arduous work.

48

Bottling and producing industrial gases.

Working under impact of dust and noise; static working posture; dangerous work.

49

Checking and repairing pressure vessels.

Working under impact of dust and noise; dangerous work.

50

Workers in charge of managing inland waterways.

Working outdoor; arduous work; working under impact of waves and wind.

51

Workers in charge of surveying, repairing and maintaining inland waterways.

Working outdoor; arduous work; working under impact of waves and wind.

52

Workers in charge of installing inland navigation aids

Working outdoor and under impact of waves and wind.

53

Captain, chief mechanic working on ships in charge of managing inland waterway.

Working outdoor; arduous work; working under impact of waves and wind.

54

Information service staff of Vietnam Coastal Communication System.

Working under impact of noise and electromagnetic field.

55

Operating, maintaining and repairing radars at radar stations of maritime navigation systems on navigational channels.

Working under impact of electromagnetic field; frequently working at height.

56

Workers in charge of managing and operating navigational channels.

Working at shifts, and under impact of electromagnetic field; stressful work

57

Receiving, transmitting and processing maritime security and safety information.

Stressful work; working under impact of electromagnetic field.

58

Operating railway construction equipment (stone graders, tie inserting machines, rail welding machines, rail grinding machines, excavators, multi-purpose machines)

Arduous work; muddy and wet workplace; working under impact of noise and tremor. Working in direct contact with acids, alkali, soda, etc.

59

Woodwork, bricklaying, metal work, mechanical repairing at sites (railway)

Working under impact of alkali vapor, noise, tremor and dust in excess of permissible limits

60

Dispatching ships, machines, equipment and personnel at ports

Always working in hazardous and dangerous environment with very high-concentration dust, bad weather and danger to other equipment.

61

Manufacturing ships’ hulls

Static working posture; arduous work; working in frequent contact with noise and dust

62

Operating corrugated iron cleaning line.

Working in confined space lacking oxygen and light, and in frequent contact with noise and dust.

63

Weighing cargo at electronic weigh stations at ports

Working in frequent contact with noise and dust; stressful work.

64

Repairing and maintaining mechanical equipment at ports

Arduous work; static working posture; working in contact with oil, grease, noise and dust

65

NDT technicians

Static working posture; working in confined space and in contact with chemicals and radioactive substances

No.

Occupation or work

Working conditions

Class-VI working conditions

1

Semi-automated immersion and maintenance of sleepers for anti-corrosion purposes

Arduous, dangerous and hazardous work; working in direct contact with strong chemicals (phenol) with very high concentration.

2

Civil engineering divers.

Extremely arduous and dangerous work; static working posture; working under impact of high pressure.

3

Managing and operating lighthouses Truong Sa Archipelago. 

Working under frequent impact of waves, wind, noise and extreme climate.

Class-V working conditions

1

Operating tamping machines.

Arduous work; working under impact of noise and violent tremor

2

Manually handling cargo at ports.

Manual, outdoor and extremely arduous work

3

Manually handling cargo at train stations, warehouses and terminals.

Manual, outdoor and extremely arduous work.

4

Pulling up and installing steel girders

Arduous and dangerous work; working under impact of noise and tremor.

5

Pouring concrete, building bridge abutments and piers. 

Arduous and dangerous work; working under impact of noise and tremor.

6

Processing steel planks and piles; raising and lowering bridge beams.

Extremely arduous and dangerous work; working under impact of noise and tremor.

7

Removing rust by sandblasting

Arduous work; working outdoor and under impact of noise, tremor and dust of very high concentration.

8

Operating pile drivers in construction

Outdoor, arduous and dangerous work; working in contact with oil, grease, noise; static working posture.

9

Operating floating cranes in bridge construction and installation of bridge beams

Working outdoor; arduous and dangerous work; working under impact of loud noise.

10

Fastening rivets on steel structures.

Working outdoor; arduous and dangerous work; working under impact of noise, tremor, heat, CO and CO₂

11

Boring into concrete to make pier foundation piles; bentonite grouting for boreholes

Outdoor, manual and arduous work; static working posture; working under impact of chemicals and noise

12

Working with pier foundation among steel piles and planks.

Working outdoor; arduous and dangerous work; working under impact of noise.

13

Mixing paint and painting bridge beams.

Working in contact with toxic chemicals; static working posture.

14

Welding steel beams.

Arduous, dangerous and stressful work; working in frequent contact with toxic gases.

15

Using X-ray machine to photograph the welding joints of steel beams and deck.

Working outdoor; static working posture; working under direct impact of X-ray.

16

Manual shaft digging and sinking.

Manual, arduous and dangerous work; working under impact of dust and noise

17

Destroying rock, piers, and beams underwater

Arduous and dangerous work.

18

Operating hot asphalt mixer (without control room).

Working under impact of high temperature, noise, violent tremor, toxic gases and thick dust. 

19

Manually feeding asphalt melting machine.

Extremely arduous and hazardous work; working under impact of heat.

20

Manually melting, pouring hot asphalt, and mending road surface

Arduous work; working in frequent contact with toxic gases, vapors and dust, and thermal radiation.

21

Building, assembling and repairing lighthouses.

Manual, arduous and dangerous work; working under impact of waves and wind.

22

Managing and operating lighthouses on islands and at estuaries.

Working under impact of waves, wind, and extreme climate.

23

Sweeping coal and fertilizers in the holds of ships or barges.

Working in confined space lacking oxygen; manual and arduous work; static working posture.

24

Chocking divers.

Arduous and dangerous works; static working posture.

25

Painting and removing rust from ship bottoms

Arduous work; static working posture; working at a smelly workplace lacking oxygen.

26

Surveying, checking and announcing navigable channels at river mouths and estuaries.

Frequently working outdoor, on rivers, in smelly and dirty environment.

27

Turning on lights on buoys on navigable channels, river mouths, lakes, and along navigable rivers.

Working outdoor; dangerous work; working under impact of waves, wind and tremor; static working posture.

28

Ironworkers, iron welders at bridge construction and repair works

Working outdoor; arduous and dangerous work; working under impact of dust, noise, tremor, CO and CO2, etc.

29

Making railway refurbishment and major repairs

Working outdoor; manual and arduous work.

Class-IV working conditions

1

Repairing and maintaining railways and bridges

Working outdoor; manual, arduous and dusty work.

2

Cleaning train stations, cleaning railroad cars at train stations (Ha Noi, Da Nang, Ho Chi Minh City)

Working outdoor and under impact of noise and dust

3

Driving cranes of 20 tons or more

Arduous work; hot workplace.

4

Driving bulldozers

Arduous work; working under impact of noise, tremor and dust

5

Performing watch duties at management stations of roads running along rivers, coastal roads and lake beds

Working on rivers; arduous work.

6

Driving electric cranes and diesel-powered cranes at ports

Working under impact of noise, dust and heat

7

Operating multi-function cranes at ports

Working in frequent contact with dust and loud noise

8

Casting prestressed concrete bridge beams, centrifugal pipes

Arduous work; working under impact of loud noise, heat and dust.

9

Welding steel pipes serving bored piles.

Working outdoor; static working posture; working under impact of toxic gases (welding gas).

10

Making formworks to cast bride beams, abutments and piers; building suspension bridges.

Outdoor, arduous and dangerous work.

11

Operating concrete and concrete component rammers

Arduous work; working under impact of noise, tremor and dust

12

Casting prestressed concrete

Working outdoor; arduous, noisy and dusty work.

13

Operating automated hot asphalt mixing station (with control room).

Working under impact of noise; stressful work.

14

Operating plastic boilers, stone driers, insulating boilers at hot asphalt mixing stations.

Working outdoor and under impact of toxic gases and thick dust.

15

Working at hot asphalt mixing stations (transporting materials, fuel, feeding rock flour to the conveyor belt; shoveling rock flour discharged by the drier; cleaning oil, coal, etc.; spraying oil on the tank of the hot asphalt truck).

Working outdoor; manual and arduous work; working in contact with toxic gases and dust

16

Repairing mechanical equipment at hot asphalt mixing stations

Working outdoor; static working posture; working under impact of toxic gases, vapors and dust

17

Driving road rollers.

Arduous work; working under impact of noise, tremor, heat, and thick dust

18

Remote-controlling road dust cleaners with compressed-air blowers or hot asphalt sprayers or pavers

Working outdoor and under impact of noise, tremor, dust, toxic gases and heat

19

Digging, shoveling, leveling road surface behind the hot asphalt paver.

Working outdoor; manual and arduous work; working under impact of heat and toxic gases and vapors.

20

Producing concrete, asphalt, emulsion.

Working in frequent contact with heat, rock dust, toxic gases (hydrocarbide acid and other additives).

21

Maintaining and repairing roads and bridges

Working outdoor; manual and arduous work; working under impact of dust

22

Maritime pilots

Standing in the bridge of the ship throughout the journey; requiring intense concentration; stressful work.

23

Bagging phosphate, apatite, phosphate fertilizer, urea, etc. in depots, inland ports, seaports and train stations

Manual and arduous work; static working posture; working under impact of toxic dust

24

Performing topography and geological survey on land, on rivers, and at sea

Arduous work; a lot of travel; working under impact of dust and bad weather.

25

Repairing, installing electrical systems and pipelines in the holds of ships

Arduous work; working in confined space; static working posture.

26

Working in the holds of ships or barges

Working under impact of heat, noise, and at a workplace lacking oxygen.

No.

Occupation or work

Working conditions

Class-V working conditions

1

Operating coal conveyor belts in basements and thermal power plants

Constantly moving; consuming a large amount of energy; dirty workplace with very high-concentration dust.

2

Operating electrical systems and machines in caverns/tunnels of hydroelectric power plants

Complicated works; a lot of travel; working at a poorly ventilated place and under impact of noise and tremor during the shift.

3

Repairing communication cables and electric cables in caverns/tunnels

Arduous work; working in frequent contact with grease and oil, at a place lacking oxygen, and under impact of tremor and noise

4

Removing rust and paint in closed containers in caverns/tunnels

Working in confined place lacking light and oxygen; static working posture; working under impact of chemicals contained in paint and ^CO2

5

Removing rust and paint in caverns/tunnels by sandblasting

Arduous work; working under impact of noise, tremor, high-concentration  dust and chemicals contained in paint and ^CO2

6

Drilling and spray concrete in caverns/tunnels

Arduous work; consuming a large amount of energy; working under impact of dust, loud noise and tremor in excess of permissible limits.

7

Performing spectrum analysis and ultrasonic testing of metals in power plants

Working under impact of radioactive substances; with heat, noise and dust; sometimes working at the place lacking oxygen

8

Operating steam drums at thermal power plants.

Dangerous work; working under impact of high temperature and thick dust

9

Repairing mechanical and hydraulic equipment at intake and spillway gates

Arduous and dangerous work (working at a height of more than 30 m); working at confined, slippery and dangerous space.

10

Repairing water pumps of hydroelectric power plants.

Arduous work; working in confined, slippery and wet place, and under impact of heat, noise, petrol and oil vapors.

11

Operating and repairing bridge cranes in electrical generator basements.

Arduous work; working in frequent contact with dust, grease, oil and loud noise

12

Operating and repairing air ventilation systems in caverns/basements/tunnels of hydroelectric power plants

Arduous work; working in contact with dust, grease, oil and loud noise

13

Managing and operating 500KV transmission lines and substations.

Arduous work; travelling through regions with complex terrain and climate; working in frequent contact with high and dangerous electromagnetic field

14

Live-line repairing transmission lines and substations with a voltage above 01 kV

Arduous work; frequently working at height; stressful work.

Class-IV working conditions

1

Operating furnaces of thermal power plants.

Dangerous work; working under impact of high temperature and thick dust

2

Repairing and maintaining furnaces of thermal power plants

Arduous work; working under impact of heat and very high-concentration dust, and in frequent contact with glass wool that may cause skin irritations and allergy.

3

Repairing hydraulic equipment, main machines and main electrical equipment of power plants

Working in contact with grease, oil, dust and noise; static working posture

4

Operating machinery and electrical systems of power plants

Complicated work; constantly moving; working under impact of noise and very high-concentration dust

5

Leaders of heat control and operation teams of thermal power plants

Constantly moving; working under impact of heat, noise and dust in excess of permissible limits

6

Operating circulating pumps of thermal power plants

Working underground in a wet place, and under continuous impact of loud noise.

7

Leaders of coal transport teams of thermal power plants

Working under impact of noise and high-concentration of dust

8

Operating turbines of power plants

Working in frequent contact with tremor and loud noise

9

Operating high-pressure air compressors of 8kg/cm² or higher

Working under impact of tremor and loud noise 

10

Repairing steam valves of thermal power plants

Working in confined space and under impact of heat and very high-concentration dust; static working posture

11

Performing testing for electrical equipment and high voltage electricity

Working under impact of high electromagnetic field, and in frequent contact with high voltage electricity; threatening life

12

Repairing automatic equipment of power plants

Working under impact of dust, tremor and loud noise

13

Making mechanical and electrical repairs in power plants

Static working posture; working under impact of noise, tremor and dust.

14

Repairing temperature control equipment of power plants

Working in frequent contact with heat, tremor and loud noise

15

Repairing fuel systems of power plants, including: coal handling system, CSU, GSU, coal conveyor belt, bridge crane and tower crane).

Dirty and dusty workplace; static working posture

16

Doing industrial cleaning job at thermal power plants

Manual work; working under impact of heat, noise and very high-concentration dust

17

Operating the intake gate of pump station on the left bank, opening and closing device for the right gate of spillway of Hoa Binh hydropower plant

Arduous work; working at a wet place with oil and grease, and under impact of loud noise

18

Repairing and charging batteries in caverns/tunnels of power plants

^{Working at a place lacking oxygen, and in frequent contact with H}2^SO4^{, CO}2

19

Repairing air compressors and equipment of transformer stations

Working in confined space with grease and oil, and under impact of loud noise

20

Performing chemical experiments

Working in frequent contact with grease, oil, toxic chemicals, noise and dust

21

Transformer oil filtering in caverns/tunnels

Working in confined space and in frequent contact with grease and oil, and under impact of loud noise

22

Making minor mechanical and electrical repairs in caverns/tunnels of power plants

Poorly-ventilated workplace; static working posture; working under impact of loud noise.

23

Spraying concrete with portable air compressor

Arduous work; working at a dirty place under impact of dust, noise and tremor in excess of permissible limits

24

Driving 350-ton bridge cranes in caverns/tunnels of hydroelectric power plants

Working at height and under impact of tremor and loud noise

25

Doing industrial cleaning job in caverns/tunnels of hydroelectric power plants

Manual work; working at a place lacking oxygen and under impact of dust, tremor and loud noise

26

Workers operating transformer stations of 110 KV or higher

Stressful work; working under impact of high electromagnetic field which adversely affects health

27

Geological workers performing topography surveys.

Working outdoor; a lot of walking; consuming a large amount of energy

28

Adjusting boilers of thermal power plants

Working next to devices with temperature from 160⁰C to 540⁰C, and under impact of noise and dust.

29

Operating coal crushers in thermal power plants

Working under impact of heat, noise, and very high-concentration coal dust

30

Operating conveyor belts, shoveling and collecting coal in thermal power plants

Manual and arduous work; working under impact of heat, noise and very high-concentration coal dust

31

Operating oil pumps for furnaces of thermal power plants (operating the oil house).

Working in frequent contact with oil, grease, noise and high temperature

32

Operating slag discharge system of the thermal power plant (slag pump, dust removal, irrigation disposal, etc.)

Working in frequent contact with heat, loud noise and dust in excess of permissible limits

33

Checking heat (major, assistant duty) in thermal power plants.

Working in frequent contact with heat, tremor, loud noise and dust in excess of permissible limits

34

Repairing electrical equipment in power plants

Static working posture; working under impact of noise, tremor and dust.

35

Driving coal cars

Working in frequent contact with heat, dust and noise in excess of permissible limits

36

Hooking coal cars in thermal power plants

Working outdoor and under impact of bad weather (hot, cold, wind, etc.), noise and high-concentration coal dust.

37

Shoveling slag discharged from the tail of furnace of the thermal power plant

Arduous and monotonous work; working in frequent contact with heat and dust

38

Operating gas turbines.

Working under impact of tremor, heat and noise in excess of permissible limits.

39

Welding and grinding towards-water wings, turbine wings of hydroelectric power plants.

Working underground at a place lacking oxygen; in frequent contact with noise, high temperature, toxic gases and steel dust

40

Managing and operating transmission lines of from 110KV to under 500KV.

Travelling through regions with complex terrain and climate; working in contact with high electromagnetic field that may adversely affect health.

41

Doing industrial cleaning of electrical substations of 500 KVA.

Monotonous work; working in contact with dust and high electromagnetic field that is dangerous and may adversely affect health.

42

Producing composite meter boxes.

Working in contact with heat, high-concentration toxic chemicals that may cause dyspnea and prostration.

43

Repairing and drying transformers with a capacity of 200 KVA or more.

Arduous work; working in frequent contact with oil, grease and high temperature

44

Operating aluminum cable braiding machine

Working under direct impact of aluminum dust and loud noise

45

Operating centrifugal concrete pole casting machine

Working under impact of tremor, noise, dust

46

Producing electrical insulating materials.

Arduous work; working in contact with high temperature and toxic chemicals (Phenol, Formalin, Amoniac…) with high concentrations

47

Operating and repairing cranes in turbine and generator chambers of thermal power plants

Working at height; stressful work; working under impact of dust, loud noise and violent tremor

48

Operating cranes in coal depots of thermal power plants

Working at height; static working posture; working under impact of dust, loud noise and tremor.

49

Operating coal crushers of thermal power plants

Working at height; constantly moving up and down; working under impact of heat, dust and loud noise

50

Operating and repairing desulfurization equipment in thermal power plants

Working at various heights and depths (from 25 m in height to 10 m in depth); working in contact with closed radiation sources, and under impact dust and noise

51

Repairing refrigeration equipment in thermal power plants

Working at height; static working posture; working in frequent contact with refrigerants, and under impact of dust, heat, and noise.

52

Operating and repairing measuring equipment and controlling equipment in thermal power plants

Working at various heights and depths (from 50 m in height to 10 m in depth); stressful work; static working posture; working under impact of dust, heat, noise and radiation

53

Operating and repairing circulating pumping stations for slag reservoirs of coal-fired thermal power plants.

Arduous work; working under impact of noise, tremor, and in frequent contact with HCl vapor.

54

Testing and calibrating steam turbines of thermal power plants.

Dangerous work; static working posture; working under impact of violent tremor and noise.

55

Leaders of teams in charge of testing and calibrating boilers and turbines of thermal power plants

Dangerous work; static working posture; working under impact of violent tremor and noise.

56

Operating and repairing hydrogen electrolysis equipment in thermal power plants

^{Working in frequent contact with KOH vapor and H2, and under impact of loud noise}

57

Operating and repairing circulating water channels and discharging equipment at slag reservoirs in thermal power plants

Frequently working outdoor; a lot of travel (more than 15km per day); arduous work; working under impact of dust

58

Repairing communications equipment (communications cables, telephones, speakers, walkie-talkies, surveillance cameras) in thermal power plants

Constantly moving up and down (from 10 m in depth to 50 m in height); static working posture; working under impact of dust, noise, and electromagnetic field.

59

Driving slag trucks in thermal power plants

Working in areas where electrical devices are installed, narrow paths; stressful work; working under impact of noise, tremor, and heat.

60

Measuring, checking, transferring coal and oil at thermal power plants.

Frequently working outdoor; checking in caverns and tunnels; static working posture; working under impact of heat, dust, and oil vapor.

61

Sampling coal and oil in thermal power plants.

Frequently working outdoor; checking in caverns and tunnels; static working posture; working under impact of heat, dust, and oil vapor.

62

Operating ash and slag separating equipment and systems in thermal power plants

Frequently working outdoor; working under impact of heat, dust.

63

Operating coal-unloading stations in thermal power plants.

Frequently working outdoor on the water; working under impact of heat, dust.

64

Driving self-propelled cranes in thermal power plants.

Stressful work; working under impact of heat and dust.

65

Managing and operating electrical substations from 110 KV to below 500 KV.

Arduous work; a lot of travel; working in contact with high electromagnetic field

66

Repairing and cleaning condensing chambers and cooling pumps of steam turbines.

Working in confined space lacking light and oxygen, and under impact of heat.

67

Replacing filters of steam turbines.

Working at height and under impact of glass dust and noise.

68

Working with industrial radiography machines; performing penetrant testing (PT) or magnetic particle testing (MT).

Working in contact with toxic chemicals and under impact of UV ray and radiation

69

Repairing and maintaining equipment of stations from 110 KV to below 500 KV.

Dangerous work; working under impact of high electromagnetic field.

70

Repairing, maintaining gas turbines, steam turbines, heat recovery units, and generators in thermal power plants

Stressful work; requiring great precision; working under impact of heat, dust, and noise.

71

Blasting and coating metal on turbines in thermal power plants.

Working in contact with silica dust, toxic chemicals, and under impact of radiation.

72

Managing and operating medium-voltage and low-voltage grids.

Working outdoor at height, and in direct contact with power sources.

73

Operating and maintaining diesel generating stations.

Working in frequent contact with oil and grease, and under impact of noise

74

Operating and maintaining mid-voltage substations.

Stressful work; working in contact with high magnetic field.

75

Testing, inspecting and calibrating electrical metering devices

Working in direct contact with lead and high electromagnetic field.

76

Hanging, removing, checking and maintaining electrical metering devices

Working outdoor at height, and in direct contact with power sources.

77

Driving cranes serving electrical repairs

Working outdoor and under impact of heat, dust, noise; stressful work.

78

Performing transformer oil testing

Working in frequent contact with grease, oil, toxic chemicals, noise and dust