Advantages of argon electric pipeline welding compared with traditional welding

Release Time :

2022-10-27 13:24

Inrecent years, ITU argon pipeline welding method has been widely usedin petrochemical industry, power construction and energy system.Different from the common arc extinguishing and priming process ofmanual arc welding, manual arc welding fills the cover surface.

ITUargon pipeline welding is an efficient and high-quality weldingtechnology using manual tungsten argon arc welding, continuous arcbacking, internal and external wire feeding process and argonprotection.
Itis easy to complete the single-sided welding and double-sided formingprocess of some important pipelines such as high-pressure, flammableand explosive. Therefore, it is first used in energy industries suchas petrochemical and electric power.

Generally,argon ITU welding is argon arc welding for backing and manual arcwelding for covering. After argon arc welding, pipes with a diameterless than 80mm can be filled and covered with argon arc welding,which is technically called all argon welding. If all 80mm largediameter pipes use all argon, the time cycle is long, which willcause high material cost, so it will not highlight the advantages ofhigh efficiency of argon arc welding. Therefore, in general, largeand medium diameter pipelines are filled and covered with smalldiameter electrodes after argon arc welding.

Toolsand equipment for argon ITU: argon arc hand arc welder, argon arcwelder, or DC welder plus argon arc welding handle. This gas usuallyrequires industrial argon with purity greater than 99.9%. The argonpressure reducing gauge is installed on the argon cylinder, and theshielding gas can be opened to about 15L. Welding wires withdiameters of 2.0, 2.5, 3.2, etc. Usually 2.0 and 2.5 are used.Tungsten electrode is also called tungsten needle. Cerium tungsten isgenerally selected, with diameters of 2.0 and 2.4 respectively.Select the appropriate tungsten electrode according to the pipe size.In addition, the ends shall be ground to a 30 degree cone. If thereis no sharp tungsten electrode, the heat will not be concentrated, sothe tungsten electrode should be ground well. Put the tungstenelectrode into the welding handle and extend it to the nozzle for 3 ~4mm. The current is selected according to the pipe wall, generallybetween 70A ~ 130a. DC positive connection is selected.

Advantages of argon electric pipeline welding compared with traditional welding

The welding process used for submerged arc welded straight seam steel pipe is submerged arc welding technology, which adopts filler welding and particle protection flux submerged arc. The diameter of production can reach 1500mm. LSAW is the English abbreviation of submerged arc welded straight seam steel pipe. The production process of submerged arc welded straight seam steel pipe includes JCOE forming technology and coil forming submerged arc welding technology. When the diameter is large, two steel plates may be used for rolling, which will form the phenomenon of double welds.

2022-10-27

Advantages of argon electric pipeline welding compared with traditional welding

Reducing high-pressure boiler pipe eddy current testing misjudgment several key factors: (1) Coil eddy current testing and inspection center roller consistency in relation to the accuracy inspection rate high pressure boiler tube inspection system of the entire product, the coil center alignment requirements than the sample through holes circumferentially poor sensitivity ≤2dB, signal to noise ratio ≥ 8dB.

2022-10-27

Advantages of argon electric pipeline welding compared with traditional welding

Argon reduces the burning loss of alloy elements and obtains denseand high-quality welded joints; The protection can isolate the adverse effects of oxygen, nitrogen and hydrogen in the air on arcand molten pool.

2022-10-27

Advantages of argon electric pipeline welding compared with traditional welding

Submerged arc welding technology is ideal for important applications such as pipelines, pressure vessels and tanks, rail manufacturing and large buildings. There are the simplest form of monofilament, double-filament structure, tandem double-filament structure, and multi-filament structure.

2022-10-27

Advantages of argon electric pipeline welding compared with traditional welding

1.What is welding power supply? Weldingpower supply refers to the equipment with electrical characteristicssuitable for welding in the electric welding machine and provides theelectric energy required for welding, which is called welding powersupply.

2022-10-27

Advantages of argon electric pipeline welding compared with traditional welding

Gas welding is a welding method that uses the flame generated by themixed combustion of combustible gas and combustion supporting gas asthe heat source to melt the weldment and welding material and realizeatomic bonding. Electric welding uses electric energy to pressurize,heat, or both, with or without filler material to achieve atomicbonding of weldments.

Shandong Xinghan Aluminum Industry Group Co., Ltd.

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Email : cnxh005@xhsteelgroup.com
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