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Welding precautions of the stainless steel pipe

Welding precautions of the stainless steel pipe shared by Weld Steel Pipe Supplier China.

It started with the rise of bicycle manufacturing. The development of petroleum in the early 19th century, the manufacture of ships, boilers and airplanes during the two world wars, the manufacture of thermal electric boilers after the second world war, the development of chemical industry and the drilling, extraction and transportation of stone, oil and natural gas all strongly promoted the development of steel tube industry in variety, output and quality.

1. Adopt the power source with vertical external characteristics, and adopt the positive polarity (welding wire to negative electrode) for dc.

2. Generally suitable for the welding of thin plates under 6mm, with the characteristics of beautiful welding seam formation and small welding deformation.

3. The shielding gas is argon with a purity of 99.99%. When the welding current is 50~50A, the argon flow is 8~0L/min, and when the current is 50~250A, the argon flow is 2~5L/min.

4. The length of the tungsten electrode protruding from the gas nozzle is 4~5mm, which is better. It is 2~3mm in areas with poor shielding such as fillet welding, and 5~6mm in places with deep grooves.

Galvanized Welded Steel Pipe

5. In order to prevent the appearance of welding holes, rust and oil stains must be cleaned on the welding parts.

6. The arc length of welding is 2~4mm for common steel, and 3mm for stainless steel, but too long is not good for protection.

7. Gas protection shall be implemented on the back of the bottom pass to prevent oxidation of the back of the bottom pass during butt laying.

8. In order to protect the welding pool with argon gas and facilitate welding operation, the Angle between the center line of tungsten pole and the workpiece at the welding place should be maintained at 80~85°, and the included Angle between the filler wire and the surface of the workpiece should be as small as possible, usually around 0°.

9. Windbreak and ventilation. In windy areas, take precautions to block the net, and take proper ventilation measures indoors.

We supply Welded Steel fluid pipe, Galvanized Welded Steel Pipe, etc., welcome to purchase our steel pipes.

Welding precautions of the stainless steel pipe

Welding precautions of the stainless steel pipe shared by Weld Steel Pipe Supplier China.

It started with the rise of bicycle manufacturing. The development of petroleum in the early 19th century, the manufacture of ships, boilers and airplanes during the two world wars, the manufacture of thermal electric boilers after the second world war, the development of chemical industry and the drilling, extraction and transportation of stone, oil and natural gas all strongly promoted the development of steel tube industry in variety, output and quality.

1. Adopt the power source with vertical external characteristics, and adopt the positive polarity (welding wire to negative electrode) for dc.

2. Generally suitable for the welding of thin plates under 6mm, with the characteristics of beautiful welding seam formation and small welding deformation.

3. The shielding gas is argon with a purity of 99.99%. When the welding current is 50~50A, the argon flow is 8~0L/min, and when the current is 50~250A, the argon flow is 2~5L/min.

4. The length of the tungsten electrode protruding from the gas nozzle is 4~5mm, which is better. It is 2~3mm in areas with poor shielding such as fillet welding, and 5~6mm in places with deep grooves.

Galvanized Welded Steel Pipe

5. In order to prevent the appearance of welding holes, rust and oil stains must be cleaned on the welding parts.

6. The arc length of welding is 2~4mm for common steel, and 3mm for stainless steel, but too long is not good for protection.

7. Gas protection shall be implemented on the back of the bottom pass to prevent oxidation of the back of the bottom pass during butt laying.

8. In order to protect the welding pool with argon gas and facilitate welding operation, the Angle between the center line of tungsten pole and the workpiece at the welding place should be maintained at 80~85°, and the included Angle between the filler wire and the surface of the workpiece should be as small as possible, usually around 0°.

9. Windbreak and ventilation. In windy areas, take precautions to block the net, and take proper ventilation measures indoors.

We supply Welded Steel fluid pipe, Galvanized Welded Steel Pipe, etc., welcome to purchase our steel pipes.

SSAW pipe main application have gas and oil industry, OD range is 406-3000mm, Thickness can supply according to client’s request. Any length can supply.

Credit Hot sale various high quality API 5L ERW steel pipe, seamless steel pipe, SSAW Steel Pipe from China leading manufacturer. Our product has API 5L, API 5CT, EN10219, EN10217, etc international quality system certification.

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https://www.creditsteelpipe.com/

Classification of welded steel pipes

According to the production method, the welded steel pipes can be divided into two categories: seamless steel pipes and welded steel pipes.

1. Seamless steel pipe can be divided into: hot rolled seamless pipe, cold drawn pipe, precision steel pipe, hot expanding pipe, cold spinning pipe and extrusion pipe, etc. Seamless steel tube with high quality carbon steel or alloy steel, hot rolling, cold rolling (pull).

2. The welded steel pipes are divided into furnace welded pipes, electric welded pipes (resistance welded pipes) and automatic arc welded pipes due to different welding processes. The welded pipes are divided into straight welded pipes and spiral welded pipes due to different welding forms. Welded steel pipe is made of tubular steel plate welded to seam or spiral seam. In terms of manufacturing method, it is divided into welded steel pipe for low-pressure fluid transportation, spiral welded steel pipe, direct welded steel pipe and electric welded pipe. Seamless steel pipe can be used for all kinds of liquid and gas pipelines. Welding pipes can be used for water pipes, gas pipes, heating pipes, etc.

According to the material classification: steel pipe according to the material (that is, steel) can be divided into: carbon pipe and alloy pipe, stainless steel pipe. Carbon pipe can be divided into ordinary carbon steel pipe and high quality carbon structure pipe. Alloy pipe can be divided into: low alloy pipe, alloy structure pipe, high alloy pipe, high strength pipe. Bearing pipe, heat and acid resistant pipe, precision alloy (such as cutting alloy) pipe and high temperature alloy pipe.

According to the type of connection: steel pipe according to the type of pipe end connection can be divided into: light pipe (pipe end without thread) and thread (pipe end with thread). Car silk tube is divided into: ordinary car silk tube and tube end thickening car silk tube. Thickening thread can also be divided into: outside the thickening (with external thread), inside the thickening (with internal thread) and inside and outside the thickening (with internal and external thread) and so on. If the thread type can also be divided into: ordinary cylindrical or conical thread and special thread, etc. In addition, according to customer needs, the car wire tube is generally equipped with pipe connector delivery.

According to the coating characteristics classification: steel tube according to the surface coating characteristics can be divided into: clarinet (not coated) and coated pipe. The coating tube has Galvanized Steel Pipe, aluminum tube, chrome tube, aluminized tube and other alloy layer pipe. Coating tube has outer coating tube, internal coating tube, internal and external coating tube. Commonly used coatings are plastics, epoxy resin, coal tar epoxy resin and various glass - based coatings.

Galvanized Steel Pipe

By use:

1. Use pipes. Such as: water, gas pipe, steam pipe seamless pipe, oil transport pipe, oil and gas trunk pipe. Agricultural irrigation faucet with pipe and sprinkler irrigation pipe.

2. Pipes for thermal equipment. Such as the general boiler with the boiling water pipe, superheated steam pipe, locomotive boiler with the heat pipe, large smoke pipe, small smoke pipe, arch brick pipe and high temperature and high pressure boiler pipe.

3. Pipe for mechanical industry. If aviation structure tube (round tube, elliptic tube, flat elliptic tube), automobile half axle tube, axle tube, automobile tractor structure tube, tractor oil cooler with tube, agricultural machinery with Square & Rectangular Pipe, transformer with tube and bearing with tube.

4. Petroleum geological drilling pipe. Such as: oil drilling pipe, oil drill pipe (kelly and hexagonal drill pipe), drilling straight, oil tubing, oil casing and various pipe joints, geological drilling pipe (core pipe, casing, active drill pipe, drilling straight, press hoop and pin joint, etc.).

5. Pipe for chemical industry. Such as: petroleum cracking pipe, chemical equipment heat exchangers and pipelines for pipe, rust and acid resistance pipe, chemical fertilizer with high pressure pipe and transport chemical medium pipe.

6. Other departments use pipes. Such as: container tube (high pressure gas cylinder tube and general container tube), instrument tube, hand case tube, needle and medical equipment tube. Classification by section shape, etc.