Profession Electric and gas welder (6th category) in the Unified Tariff Qualification Directory

04.12.2019

APPROVE:

________________________

[Job title]

________________________

[Name of company]

________________/[FULL NAME.]/

"____" ____________ 20__

JOB DESCRIPTION

Electric and gas welder of the 6th category

1. General Provisions

1.1. Real job description determines the job duties, rights and responsibilities of an electric and gas welder of the 6th category [Name of organization in the genitive case] (hereinafter referred to as the Company).

1.2. The electric and gas welder of the 6th category is appointed to the position and dismissed from the position in the established current labor law by order of the head of the Company.

1.3. A person with an average professional education and relevant professional training.

1.4. An electric and gas welder of the 6th category belongs to the category of workers, reports directly to [name of the position of the immediate supervisor in the dative case] of the Company.

1.6. AT practical activities electric and gas welder of the 6th category should be guided by:

local acts and organizational and administrative documents of the Company;
internal work schedule;
rules of labor protection and safety, ensuring industrial sanitation and fire protection;
instructions, orders, decisions and instructions of the immediate supervisor;
this job description.

1.6. An electric and gas welder of the 6th category must know:

variety of titanium alloys, their welding and mechanical properties;
kinematic diagrams automatic and semiautomatic devices, basic device electronic circuits management;
rules for training robots and rules for working with robotic systems;
types of corrosion and factors causing it;
methods of special tests of welded products and the purpose of each of them;
main types of heat treatment welded joints;
bases on metallography of welded seams.

1.7. Electric and gas welder of the 6th category is responsible for:

timely and high-quality performance of tasks for their intended purpose;
compliance with performance and labor discipline;
compliance with labor safety measures, maintenance of order, compliance with the rules fire safety in the area of work assigned to him (workplace).

1.8. During the period of temporary absence of an electric and gas welder of the 6th category, his duties are assigned to [name of the position of the deputy].

2. Job responsibilities

An electric and gas welder of the 6th category performs the following labor functions:

2.1. Manual arc, plasma and gas welding of particularly complex devices, parts, assemblies, structures and pipelines made of various steels, cast iron, non-ferrous metals and alloys, designed to work under dynamic and vibration loads and under high pressure.

2.2. Manual arc and gas-electric welding of building and technological structures operating under dynamic and vibration loads, and structures of complex configuration.

2.3. Automatic welding of various structures from alloyed special steels, titanium and other alloys on automatic machines of a special design, multi-arc, multi-electrode automatic machines and automatic machines equipped with television, photoelectronic and other special devices, on automatic manipulators (robots).

2.4. Mechanized welding of apparatuses, assemblies, pipeline structures, building and technological structures operating under dynamic and vibration loads, when performing welds in the overhead position and on a vertical plane.

2.5. Welding of experimental structures from metals and alloys with limited weldability, as well as from titanium and titanium alloys.

2.6. Welding of complex structures in block design in all spatial positions of the weld.

In case of official necessity, an electric and gas welder of the 6th category may be involved in the performance of his duties. official duties overtime, in the manner prescribed by law.

3. Rights

An electric and gas welder of the 6th category has the right to:

3.1. Get acquainted with the draft decisions of the management of the enterprise relating to its activities.

3.2. Submit proposals for the management to improve the work related to the responsibilities provided for in this job description.

3.3. Notify the immediate supervisor of any deficiencies identified in the course of the performance of their duties in production activities enterprise (its structural subdivisions) and make proposals for their elimination.

3.4. Request personally or on behalf of the immediate supervisor from the heads of enterprise departments and specialists information and documents necessary for the performance of their duties.

3.5. Involve specialists from all (separate) structural divisions of the Company in solving the tasks assigned to him (if this is provided for by the provisions on structural divisions if not, with the permission of the head of the Company).

3.6. Require the management of the enterprise to assist in the performance of their duties and rights.

3.7. Use information materials and legal documents necessary for the performance of their duties.

3.8. Pass certification in accordance with the established procedure with the right to receive the appropriate qualification category.

3.4. Improve your skills.

4. Responsibility and performance evaluation

4.1. An electric and gas welder of the 6th category bears administrative, disciplinary and material (and in some cases provided for by the legislation of the Russian Federation, and criminal) responsibility for:

4.1.1. Non-fulfillment or improper fulfillment of official instructions of the immediate supervisor.

4.1.2. Failure or improper performance of labor functions and the tasks assigned to him.

4.1.3. Unlawful use of the granted official powers, as well as their use for personal purposes.

4.1.4. Inaccurate information about the status of the work entrusted to him.

4.1.5. Failure to take measures to suppress the identified violations of safety regulations, fire and other rules that pose a threat to the activities of the enterprise and its employees.

4.1.6. Failure to enforce labor discipline.

4.2. Evaluation of the work of an electric and gas welder of the 6th category is carried out:

4.2.1. Direct supervisor - regularly, in the course of the daily implementation by the employee of his labor functions.

4.2.2. Certification Commission enterprises - periodically, but at least once every two years, based on the documented results of work for the evaluation period.

4.3. The main criterion for evaluating the work of an electric and gas welder of the 6th category is the quality, completeness and timeliness of his performance of the tasks provided for by this instruction.

5. Working conditions

5.1. The mode of operation of an electric and gas welder of the 6th category is determined in accordance with the internal labor regulations established by the Company.

5.2. In connection with production necessity an electric and gas welder of the 6th category is obliged to go on business trips (including local ones).

Acquainted with the instruction ___________ / ____________ / "__" _______ 20__

Characteristics of works.

Manual arc, plasma and gas welding of particularly complex devices, parts, assemblies, structures and pipelines made of various steels, cast iron, non-ferrous metals and alloys, designed to work under dynamic and vibration loads and under high pressure. Manual arc and gas-electric welding of building and technological structures operating under dynamic and vibration loads, and structures of complex configuration. Automatic welding of various structures from alloyed special steels, titanium and other alloys on automatic machines of a special design, multi-arc, multi-electrode automatic machines and automatic machines equipped with television, photoelectronic and other special devices, on automatic manipulators (robots). Mechanized welding of apparatuses, assemblies, pipeline structures, building and technological structures operating under dynamic and vibration loads, when performing welds in the overhead position and on a vertical plane. Welding of experimental structures from metals and alloys with limited weldability, as well as from titanium and titanium alloys. Welding of complex structures in block design in all spatial positions of the weld.

What should know:

variety of titanium alloys, their welding and mechanical properties
kinematic diagrams of automata and semi-automatic devices, principal arrangement of electronic control circuits
rules for training robots and rules for working with robotic systems
types of corrosion and factors that cause it
methods of special tests of welded products and the purpose of each of them
main types of heat treatment of welded joints
bases on metallography of welded seams.

Work examples

Beams for working platforms of open-hearth shops, structures of bunker and unloading racks of metallurgical enterprises, crane beams for heavy-duty cranes, booms of walking excavators - welding.
Span beams of overhead cranes with a lifting capacity of 30 tons and more - welding.
Boiler drums with pressure over 4.0 MPa (38.7 atm.) - welding.
Air separation units of oxygen workshops - welding of non-ferrous metal parts.
Gas holders and tanks for oil products with a volume of 5000 cubic meters. m and more - welding during installation.
Main gas pipelines - welding at installation.
Parts and assemblies made of non-ferrous metals operating under pressure over 4.0 MPa (38.7 atm.) - welding.
Capacities and coatings spherical and drop-shaped - welding.
Tanks, caps, spheres and vacuum pipelines - welding.
Drill pipe locks and couplings - double seam welding.
Wheels working gas turbine compressors, steam turbines, powerful blowers - welding of blades and blades.
Ammonia synthesis columns - welding.
Structures made of light aluminum-magnesium alloys - welding.
The design of radio masts, TV towers and power transmission line supports - welding during installation.
Structures made of low-magnetic steels - welding.
Steam turbine boxes - welding and welding of shells.
Stator housings of large hydrogen- and hydrogen-water-cooled turbogenerators - welding.
Cases of heavy laser engines and presses - welding.
Steam boilers - bottom dressing, welding of critical units with a one-sided butt weld.
Paws and flutes of drilling bits, drilling steam conductors - welding.
Blades of rotors and stators of turbines - soldering.
Oil and gas pipelines - welding during the elimination of gaps.
Piping of oil and gas wells and wells of contour filling - welding.
Wiring of impulse turbines and boilers - welding.
Tanks and structures made of two-layer steel and other bimetals - welding.
Reinforcing bars of reinforced concrete structures of detachable forms - welding.
Span structures of metal and reinforced concrete bridges - welding.
Pipe elements of steam boilers with pressure over 4.0 MPa (38.7 atm.) - welding.
Pressure pipelines, spiral chambers and impeller chambers of hydroelectric turbines - welding.
Pipelines of external gas supply networks of medium and high pressure - welding during installation.
Technological pipelines of categories I and II (groups), as well as steam and water pipelines of categories I and II - welding.

Unified Tariff and Qualification Directory of Works and Professions of Workers (ETKS), 2019
Part No. 1 of issue No. 2 ETKS
The issue is approved by the Decree of the Ministry of Labor of the Russian Federation of November 15, 1999 N 45
(as amended by the Order of the Ministry of Health and Social Development of the Russian Federation of November 13, 2008 N 645)

Electric and gas welder

§ 45. Electric and gas welder of the 2nd category

Job Description. Manual oxygen cutting and cutting with petrol-cutting and kerosene-cutting machines of light-weight and heavy steel scrap. Manual arc, plasma, gas, automatic and semi-automatic welding of simple parts, assemblies and structures made of carbon steels. Oxygen and plasma rectilinear and curvilinear cutting in the lower and vertical position of the welded seam with metal, as well as simple and medium complexity parts from carbon steels by marking manually, on portable stationary and plasma cutting machines. Tacking parts, products, structures in all spatial positions. Preparation of products, assemblies and connections for welding. Cleaning seams after welding and cutting. Ensuring protection of the reverse side of the weld during welding in shielding gases. Surfacing of simple details. Elimination of shells and cracks in simple parts, assemblies, castings. Heating of structures and parts during straightening. Reading simple drawings. Preparation of gas cylinders for work. Maintenance of portable gas generators.

Must know: device and principle of operation of serviced electric welding machines and apparatus for arc welding of alternating and direct current, gas welding and gas cutting equipment, gas generators, automatic and semi-automatic electric welding machines, oxygen and acetylene cylinders, reducing devices and welding torches; rules for using the applied burners, reducers, cylinders; methods and basic techniques of tacking; forms of seam cutting for welding; rules for ensuring protection when welding in shielding gas; types of welded joints and types of seams; rules for preparing the edges of products for welding; types of grooves and designation of welds in the drawings; basic properties of electrodes used in welding, welding metal and alloys, gases and liquids; permissible residual gas pressure in cylinders; purpose and brand of fluxes used in welding; purpose and conditions for the use of instrumentation; causes of defects in welding and ways to prevent them; characteristics of the gas flame; scrap dimensions according to the state standard.

Work examples

1. Tanks of transformers - eyeliner for automatic welding.

2. Cradle beams, sprung beams and bolsters of all-metal cars and electric section cars - welding of reinforcing squares, guides and centering rings.

3. Shoes of lifeline racks - cutting on the ship.

4. Rolling beams - welding of points, capturing strips along the marking.

5. Strikers and patterns of steam hammers - welding.

6. Box bolts, column bolts and center bolts - surfacing of working places.

7. Details of side awning frames - tacking and welding.

8. Details of metal containers - hot straightening.

9. Diaphragms of frames of platforms and metal gondola cars - welding of ribs.

10. Foals - welding.

11. Rivets - cutting heads.

12. Frames and details of brake pads of freight cars and window frames passenger cars- welding.

13. Casings and fences, lightly loaded units of agricultural machines - welding.

14. Casings of oil pumps and filters of automobiles - surfacing of shells in castings.

15. Header brackets, brake control rollers - welding.

16. Brackets for attaching the muffler to the car frame - surfacing of cracks.

17. Mounting brackets for mining equipment - welding.

18. Arms of subframes of dump trucks - welding.

19. Gutter covers for undercar lighting - welding.

20. Corner sheets of the inner and outer sheathing of the tram - welding of cuts.

21. Steel scrap for charge - cutting.

22. Linings and linings spring - welding.

23. Small flasks - welding of ears.

24. Steel flasks of small sizes - welding of ears.

25. Small steel and cast iron castings - elimination of shells in unworked places by melting.

26. Pallets for machines - welding.

27. Profits and letniki on steel castings up to 300 mm thick - cutting.

28. Frames of transformer tanks - welding.

29. Frames of bed mattresses, armored and rhombic nets - welding.

30. Receiving pipes - fusing of safety nets.

31. Car fender reinforcements - welding.

32. Hydraulic clamps for dump truck mechanisms - welding.

33. Non-critical foundations, small units made of low-carbon and low-alloy steels - semi-automatic welding on a rack.

§ 46. Electric and gas welder of the 3rd category

Job Description. Manual arc, plasma, gas welding, automatic and semi-automatic welding of simple parts, assemblies and structures made of structural steels, non-ferrous metals and alloys and of medium complexity of parts, assemblies, structures and pipelines made of carbon steels in all positions of the seam, except for the ceiling. Oxy-plasma straight and curved cutting in various positions of metals, simple and medium complexity parts made of carbon and alloy steels, non-ferrous metals and alloys according to manual marking on portable, stationary and plasma cutting machines in all positions of the weld. Manual oxygen cutting and cutting with petrol-cutting and kerosene-cutting devices to the specified dimensions with the release of non-ferrous metal waste and with the preservation or cutting out of machine components and parts. Manual arc air planing of simple and medium complexity parts from various steels, cast iron, non-ferrous metals and alloys in various positions. Surfacing of shells and cracks in parts, assemblies and castings of medium complexity. Preliminary and concomitant heating when welding parts in compliance with the specified mode. Reading drawings of varying complexity of parts, assemblies and structures.

Must know: installation of serviced electric welding and plasma cutting machines, gas welding equipment, automatic machines, semi-automatic devices and a plasma torch; requirements for welding seam and surfaces after air planing; methods for selecting electrode grades depending on steel grades; properties and significance of electrode coatings; the structure of the weld; methods of their testing and types of control; rules for preparing parts and assemblies for welding and welding; rules for selecting the metal heating mode depending on the brand of metal and its thickness; causes of internal stresses and deformations in welded products and measures to prevent them; basic technological methods of welding and surfacing of parts made of various steels, cast iron, non-ferrous metals and alloys; cutting mode and gas consumption during oxygen and gas-electric cutting.

Work examples

1. Fittings made of tin bronze and silicon brass under test pressure up to 1.6 MPa (15.5 atm.) - defects are deposited.

2. Beater and cutting drums, front and rear axles of a tractor trailer, drawbar and frames of a combine and header, harvester augers, rakes and reels - welding.

3. Sidewalls, transition platforms, footboards, frames and sheathing of railway cars - welding.

4. Balancers for spring suspension of the rolling stock - manual cutting according to the marking.

5. Road buoys and barrels, artillery shields and pontoons - welding.

6. Crankshafts of engines and camshafts of automobiles - welding of defective semi-finished forgings with special steels.

7. Shafts of electrical machines - fusing necks.

8. Silencers - welding.

9. Internal combustion engines (fuel and air systems) - welding.

10. Car parts (oil heater neck, box crankcase, crankcase cover) - defect deposits.

11. Parts made of sheet steel up to 60 mm thick - manually cut according to the marking.

12. Freight car body frame parts - welding.

13. Details of the rocker mechanism - welding of holes.

14. Bronze brake discs - shell fusing.

15. Blanks for manual or automatic arc welding - cutting without bevel.

16. Frames for panels and control panels - welding.

17. Track rollers - welding.

18. Complete casings, heating boilers - welding.

19. Casings of elastic couplings - welding.

20. Brake shoes trucks, casings, axle shafts of the rear axle - welding.

21. Structures, components, parts for gun mounts - welding.

22. Cases of electrical explosive equipment - welding.

23. Load-lifting cranes - surfacing of slopes.

24. Bodies of dump trucks - welding.

25. Rear axles of cars - surfacing of shells in castings.

26. Facing of a car radiator - welding of cracks.

27. Level regulator floats (fittings) - welding.

28. Projectors - welding to the ship's hull.

29. Profits, sprues for castings of complex configuration with a thickness of more than 300 mm - cutting.

30. The frames of the drawbars of a steam locomotive - surfacing.

31. Frame profile windows of the driver's cab - welding.

32. Pantograph frames - welding.

33. Locomotive frames - welding of conductors, flooring sheets, parts.

34. Reservoirs for non-flammable liquids and brake systems of rolling stock - welding.

35. Shaped cutters and simple dies - welding.

36. Bulkhead shaft seals - fusing of the body and pressure sleeve.

37. Machine beds of small sizes - welding.

38. Racks, bunker grates, transition platforms, stairs, railings, decking, boiler lining - welding.

39. Rear wheel hubs, rear axle and other car parts - malleable iron soldering.

40. Joints and grooves of sections, deck partitions, partitions - automatic welding on the rack.

41. Ventilation pipes - welding.

42. Copper exhaust pipes - welding.

43. Chimneys up to 30 m high and ventilation pipes made of carbon steel sheet - welding.

44. Connected fire tubes in boilers and superheater tubes - welding.

45. Pipes of general purpose - cutting bevel edges.

46. Pipes of the brake line - welding.

47. Non-pressure pipelines for water (except for main ones) - welding.

48. Pipelines of external and internal networks water supply and heat supply - welding in workshop conditions.

49. Automobile tanks - automatic welding.

50. Brass (open) gasifier balls - welding.

51. Gears - welding of teeth.

§ 47. Electric and gas welder of the 4th category

Job Description. Manual arc, plasma and gas welding of medium complexity of parts, assemblies, structures and pipelines made of structural steels, cast iron, non-ferrous metals and alloys and complex parts of assemblies, structures and pipelines made of carbon steels in all spatial positions of the weld. Manual oxygen, plasma and gas straight and shaped cutting and cutting with petrol and kerosene cutting machines on portable, stationary and plasma cutting machines, in various positions of complex parts from various steels, non-ferrous metals and alloys according to marking. Oxygen flux cutting of parts made of high-chromium and chromium-nickel steels and cast iron. Oxygen cutting of ship objects afloat. Automatic and mechanical welding of medium complexity and complex devices, assemblies, pipeline structures made of various steels, cast iron, non-ferrous metals and alloys. Automatic welding of critical complex building and technological structures operating in difficult conditions. Manual electric arc air planing of complex parts from various steels, cast iron, non-ferrous metals and alloys in various positions. Welding of cast iron structures. Surfacing of defects in complex parts of machines, mechanisms, structures and castings under machining and test pressure. Hot straightening of complex structures. Reading drawings of various complex welded metal structures.

Must know: the device of various electric welding and gas cutting equipment, automatic and semi-automatic devices, features of welding and electric arc planing on alternating and direct current; the basics of electrical engineering within the scope of the work performed; types of defects in welds and methods for their prevention and elimination; basics of metal welding; mechanical properties of welded metals; principles of selection of the mode of welding by instruments; brands and types of electrodes; methods for obtaining and storing the most common gases: acetylene, hydrogen, oxygen, propane-butane, used in gas welding; gas cutting process of alloy steel.

Work examples

1. Equipment, vessels and containers made of carbon steel, operating without pressure - welding.

2. Equipment and vessels for chemical and petrochemical industries: tanks, separators, vessels, etc. - cutting holes with beveled edges.

3. Pipeline shut-off valves made of non-ferrous metals and alloys under test pressure over 1.6 to 5.0 MPa (over 15.5 to 48.4 atm) - deposition of defects.

4. Transformer tanks - welding of branch pipes, welding of boxes for terminals, cooler boxes, current settings and tank covers.

5. Rudder stocks, propeller shaft brackets - hardfacing.

6. Cylinder blocks of car engines - surfacing of shells in castings.

7. Crankshafts - surfacing of necks.

8. Bronze and brass inserts - surfacing on steel bearings.

9. Headset and bodies of burners of boilers - welding.

10. Details from sheet stainless steel, aluminum or copper alloys - gas-electric cutting with beveled edges.

11. Parts made of cast iron - welding, surfacing with and without heating.

12. Parts made of sheet steel with a thickness of more than 60 mm - manual cutting according to the markup.

13. Parts and assemblies made of non-ferrous metals - welding followed by pressure testing.

14. Carriage retarders - welding and welding of units under operating conditions.

15. Cast iron gear teeth - hardfacing.

16. Products from non-ferrous alloys thin-walled (covers of air coolers, bearing shields, fans of turbogenerators) - welding with brass or silumin.

17. Large cast iron products: frames, pulleys, flywheels, gears - fusing of shells and cracks.

18. Chambers of impellers of hydraulic turbines - welding and surfacing.

19. Structures of blast furnaces (casings, air heaters, gas pipelines) - cutting with beveled edges.

20. Frames of industrial furnaces and boilers - welding.

21. Crankcases of large motors and housings of mechanical transmission of diesel locomotives - welding.

22. Lower crankcases - welding.

23. Coils of poles of electrical machines from strip copper - welding and welding of jumpers.

24. Gas exhaust manifolds and pipes - welding.

25. Rings regulating hydraulic turbines - welding and surfacing.

26. Housings and bridges of the drive wheels of the harvester - welding.

27. Cases of compressors, low and high pressure cylinders of air compressors - cracking.

28. Rotor housings up to 3500 mm in diameter - welding.

29. Cases of stop valves for turbines up to 25,000 kW - welding.

30. Cases of brush holders, segments of reversers, rotors of electric motors - hardfacing.

31. Fastening and supports for pipelines - welding.

32. Brackets and fastenings for locomotive pivot bogies - welding.

33. Sheets of large thicknesses (armor) - welding.

34. Masts, drilling and operational towers - welding in workshop conditions.

35. Aluminum furniture - welding.

36. Fundamental plates of large electrical machines - welding.

37. Struts, axle shafts of aircraft landing gear - welding.

38. Heaters - welding of a holder, a hot-water pipe with a holder, a cone, rings and flanges.

39. Bearings and bushings, axle boxes, drawbars - fusing along the frame and fusing cracks.

40. Pistons of pneumatic hammers - build-up of shells and cracks.

41. Dust and gas pipelines, fuel supply units and electrostatic precipitators - welding.

42. Spool frames, pendulums - welding.

43. Porthole frames from aluminum alloys- welding.

44. Frames of conveyors - welding.

45. Air trolleybus tanks - welding.

46. Reservoirs for petroleum products with a capacity of less than 1000 cubic meters. m - welding.

47. Rail butt joints - welding in operational conditions.

48. Rails and prefabricated crosses - welding ends.

49. Single and twisted metal meshes for pulp and paper production - soldering the ends with silver solder.

50. Crusher beds - welding.

51. Beds and housings of electric machines welded-cast - welding.

52. Cast iron beds of large machine tools - welding.

53. Beds of working stands of rolling mills - welding.

54. Air-cooled turbogenerator stators - welding.

55. Tubes for sensors with a radioactive isotope - welding.

56. Pipe elements of boilers, armor plates, etc. - hot editing.

57. Pipelines of external and internal water supply and heating networks - welding at installation.

58. Pipelines of external and internal low-pressure gas supply networks - welding in workshop conditions.

59. Drill pipes - welding of couplings.

60. Technological pipelines of the 5th category - welding.

61. Half-timbered houses, communications, lanterns, runs, monorails - welding.

62. Milling cutters and complex dies - welding and surfacing of a quick cut and hard alloy.

63. Brass refrigerators - welding seams for hydrotesting at pressures up to 2.5 MPa (24.2 atm.).

64. Cylinders of car blocks - shell fusing.

65. Automobile tanks - welding.

66. Balls, floats and tanks made of special aluminum alloys - welding.

§ 48. Electric and gas welder of the 5th category

Job Description. Manual arc, plasma and gas welding of various complexity of devices, parts, assemblies, structures and pipelines made of various steels, cast iron, non-ferrous metals and alloys, designed to work under dynamic and vibration loads and under pressure. Manual arc and plasma welding of complex building and technological structures operating in difficult conditions. Oxygen and plasma straight and horizontal cutting of complex parts from various steels, non-ferrous metals and alloys according to manual marking with cutting edges for welding, including the use of special fluxes from various steels and alloys. Oxygen cutting of metals under water. Automatic and mechanical welding of complex devices, assemblies, structures and pipelines made of various steels, non-ferrous metals and alloys. Automatic welding of building and technological structures operating under dynamic and vibration loads. Mechanized welding of complex building and technological structures operating in difficult conditions. Manual electric arc air planing of complex parts from various steels, cast iron, non-ferrous metals and alloys in various positions. Welding of structures in block design in all spatial positions of the weld. Welding and surfacing of cracks and cavities in thin-walled products and in products with hard-to-reach places for welding. Heat treatment with a gas burner of welded joints after welding. Reading drawings of varying complexity of welded spatial metal structures.

Must know: electrical circuits and designs of various welding machines, automatic, semi-automatic and power supplies; technological properties of welded metals, including high-alloy steels, as well as deposited metal and metal subjected to planing; selection of the technological sequence for applying welds; the influence of heat treatment on the properties of the weld, the rules for cutting metals under water.

Work examples

1. Blast furnace embrasures - surfacing of shells and cracks.

2. Equipment and vessels made of carbon steels working under pressure and alloy steels working without pressure - welding.

3. Fittings of open-hearth furnaces - welding during the repair of existing equipment.

4. Armature of load-bearing reinforced concrete structures (foundations, columns, ceilings, etc.) - welding.

5. Pipeline shut-off valves made of tin bronze and silicon brass - surfacing under test pressure over 5.0 MPa (48.4 atm.).

6. Tanks of unique powerful transformers - welding, including welding of lifting hooks, jacking brackets, stainless plates operating under dynamic loads.

7. Beams and traverses of crane trucks and balancers - welding.

8. Span beams of overhead cranes with a lifting capacity of less than 30 tons - welding.

9. Center beams, buffer beams, pivot beams, bogie frames of locomotives and wagons - welding.

10. Cylinders, caps, spheres operating in vacuum - welding.

11. Drums of boilers with pressure up to 4.0 MPa (38.7 atm.) - welding.

12. Blocks of building and technological structures made of sheet metal (air heaters, scrubbers, casings of blast furnaces, separators, reactors, gas ducts of blast furnaces, etc.) - welding.

13. Cylinder blocks and water collectors of products - welding.

14. Large crankshafts - welding.

15. Lead baths - welding.

16. Gas holders and tanks for oil products with a volume of 5000 cubic meters. m and more - welding in workshop conditions.

17. Gas and oil pipelines - welding on the rack.

18. Details of gas welding equipment - soldering with silver solders.

19. Parts of especially critical machines and mechanisms (charging apparatus for blast furnaces, propellers, turbine blades, rolls of rolling mills, etc.) - surfacing with special, hard, wear-resistant and corrosion-resistant materials.

20. Details of complex configuration of critical structures - cutting with cutting edges for welding without additional machining.

21. Spherical and spherical bottoms - cutting oblique holes without subsequent machining.

22. Parts of critical machines, mechanisms and structures, forged, stamped and cast (propellers, turbine blades, engine cylinder blocks, etc.) - defect build-up.

23. Red copper coils - welding.

24. Caissons for open-hearth furnaces operating at high temperatures - welding.

25. Caissons of open-hearth furnaces (hot repair) - internal welding.

26. Manifolds of complex configuration of 20 or more parts made of stainless and heat-resistant steel with a check for macrostructure and radiography - welding.

27. Columns, bunkers, truss and truss trusses, beams, flyovers, etc. - welding.

28. Stainless steel bellows expansion joints - soldering.

29. Designs of radio masts, TV towers and power transmission line supports - welding in stationary conditions.

30. Cases of cutting, loading machines, coal combines and mine electric locomotives - welding.

31. Head bodies, traverses, bases and other complex assemblies of presses and hammers - welding.

32. Cases, covers, tees, knees, cast iron cylinders - surfacing of defects.

33. Rotor housings with a diameter of more than 3500 mm - welding.

34. Stop valve housings for turbines with power over 25,000 kW - welding.

35. Covers, stators and lining of hydraulic turbine blades - welding.

36. Masts, drilling and operating towers - welding during installation.

37. Bases from high-alloyed drill pipes for drilling rigs and three-diesel drives - welding.

38. Castings of aluminum and bronze, complex and large - fusing of shells and cracks.

39. Support plates for walking excavators - welding.

40. Complex molds - welding in hard-to-reach places.

41. Frames and components of cars and diesel engines - welding.

42. Pivot and diesel locomotive frames - welding.

43. Reservoirs for petroleum products with a capacity of 1000 and less than 5000 cubic meters. m - welding on installation.

44. Rotors of electrical machines - welding of short-circuited rings, rods, welding.

45. Complex beds, aprons of large lathes - welding, cracking.

46. Joints of reinforcement releases of elements of load-bearing prefabricated reinforced concrete structures - welding.

47. Tubes for impulse control and automation systems - welding.

48. Pipe elements of steam boilers with pressure up to 4.0 MPa (38.7 atm.) - welding.

49. Pipelines of external and internal low-pressure gas supply networks - welding at installation.

50. Pipelines of external and internal gas supply networks of medium and low pressure - welding during installation and in workshop conditions.

51. Technological pipelines of III and IV categories (groups), as well as pipelines of steam and water of III and IV categories - welding.

52. Lead pipes - welding.

53. Units of under-engine frames and cylinders of shock absorbers of aircraft landing gear - welding.

54. Brass refrigerators - welding of seams for hydrotesting under pressure over 2.5 MPa (24.2 atm.).

55. Engine cylinders - fusing of inner and outer jackets.

56. Tires, tapes, compensators for them from non-ferrous metals - welding.

§ 49. Electric and gas welder of the 6th category

Job Description. Manual arc, plasma and gas welding of particularly complex devices, parts, assemblies, structures and pipelines made of various steels, cast iron, non-ferrous metals and alloys, designed to work under dynamic and vibration loads and under high pressure. Manual arc and gas-electric welding of building and technological structures operating under dynamic and vibration loads, and structures of complex configuration. Automatic welding of various structures from alloyed special steels, titanium and other alloys on automatic machines of a special design, multi-arc, multi-electrode automatic machines and automatic machines equipped with television, photoelectronic and other special devices, on automatic manipulators (robots). Mechanized welding of apparatuses, assemblies, pipeline structures, building and technological structures operating under dynamic and vibration loads, when performing welds in the overhead position and on a vertical plane. Welding of experimental structures from metals and alloys with limited weldability, as well as from titanium and titanium alloys. Welding of complex structures in block design in all spatial positions of the weld.

Must know: variety of titanium alloys, their welding and mechanical properties; kinematic diagrams of automata and semi-automatic devices, principal arrangement of electronic control circuits; rules for training robots and rules for working with robotic systems; types of corrosion and factors causing it; methods of special tests of welded products and the purpose of each of them; main types of heat treatment of welded joints; bases on metallography of welded seams.

Work examples

1. Beams of working platforms of open-hearth shops, structures of bunker and unloading racks of metallurgical enterprises, crane beams for heavy-duty cranes, booms of walking excavators - welding.

2. Span beams of overhead cranes with a lifting capacity of 30 tons and more - welding.

3. Boiler drums with pressure over 4.0 MPa (38.7 atm.) - welding.

4. Air separation units of oxygen workshops - welding of non-ferrous metal parts.

5. Gas holders and tanks for oil products with a volume of 5000 cubic meters. m and more - welding during installation.

6. Main gas and product pipelines - welding at installation.

7. Parts and assemblies made of non-ferrous metals operating under pressure over 4.0 MPa (38.7 atm.) - welding.

8. Capacities and coatings spherical and drop-shaped - welding.

9. Vacuum containers, caps, spheres and pipelines - welding.

10. Locks for drill pipes and couplings - double seam welding.

11. Working wheels of gas turbine compressors, steam turbines, powerful blowers - welding of blades and blades.

12. Ammonia synthesis columns - welding.

13. Structures made of light aluminum-magnesium alloys - welding.

14. The design of radio masts, TV towers and power transmission line supports - welding during installation.

15. Structures made of low-magnetic steels - welding.

16. Boxes of steam turbines - welding and welding of shells.

17. Stator housings of large hydrogen- and hydrogen-water-cooled turbogenerators - welding.

18. Cases of heavy laser engines and presses - welding.

19. Steam boilers - straightening of bottoms, welding of critical units with a one-sided butt weld.

20. Paws and flutes of drilling bits, drilling steam conductors - welding.

21. Rotor blades and turbine stators - soldering.

22. Oil and gas pipelines - welding during the elimination of gaps.

23. Piping of oil and gas wells and wells of contour filling - welding.

24. Wiring of impulse turbines and boilers - welding.

25. Tanks and structures made of two-layer steel and other bimetals - welding.

26. Reinforcing bars of reinforced concrete structures of detachable forms - welding.

27. Span structures of metal and reinforced concrete bridges - welding.

28. Pipe elements of steam boilers with pressure over 4.0 MPa (38.7 atm.) - welding.

29. Pressure pipelines, spiral chambers and impeller chambers of hydroelectric turbines - welding.

30. Pipelines of external gas supply networks of medium and high pressure - welding during installation.

31. Technological pipelines of I and II categories (groups), as well as pipelines of steam and water of categories I and II - welding.

Characteristics of works. Manual arc, plasma and gas welding of particularly complex devices, parts, assemblies, structures and pipelines made of various steels, cast iron, non-ferrous metals and alloys, designed to work under dynamic and vibration loads and under high pressure. Manual arc and gas-electric welding of building and technological structures operating under dynamic and vibration loads, and structures of complex configuration. Automatic welding of various structures from alloyed special steels, titanium and other alloys on automatic machines of a special design, multi-arc, multi-electrode automatic machines and automatic machines equipped with television, photoelectronic and other special devices, on automatic manipulators (robots). Mechanized welding of apparatuses, assemblies, pipeline structures, building and technological structures operating under dynamic and vibration loads, when performing welds in the overhead position and on a vertical plane. Welding of experimental structures from metals and alloys with limited weldability, as well as from titanium and titanium alloys. Welding of complex structures in block design in all spatial positions of the weld.

Must know: a variety of titanium alloys, their welding and mechanical properties; kinematic diagrams of automata and semi-automatic devices, principal arrangement of electronic control circuits; rules for training robots and rules for working with robotic systems; types of corrosion and factors causing it; methods of special tests of welded products and the purpose of each of them; main types of heat treatment of welded joints; bases on metallography of welded seams.