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3 types of welded pipe

Welded steel pipe

Welded steel pipe: Also called welded pipe, it is made of steel strip cut into narrow steel strips, and then wrapped into a tube by cold working mold. A special welder then welds a seam of pipe. Polish the outer weld. Generally, the inner burr of welded pipe is not played. Only the precision welded pipe will burr inside.

Corrosion prevention: Welded steel pipe refers to the steel strip or steel plate bent into a round, square shape and then welded into the surface of the joint of the steel pipe. According to different welding methods, it can be divided into arc welding pipe, high frequency or low frequency resistance welding pipe, gas welding pipe, furnace welding pipe, Bondi pipe, etc. According to the shape of the weld, it can be divided into straight welded pipe and spiral welded pipe. Electric welded steel pipe is used in oil drilling, machinery, manufacturing and so on. Furnace welded pipe can be used as water and gas pipe, big mouth straight seam welded pipe for high pressure oil and gas transmission, etc. Spiral welded pipe is used for oil and gas transmission, pipe pile, bridge pier, etc. Welded steel pipe has lower cost and higher production efficiency than seamless steel pipe.

Straight seam pipe

It is made of steel plate or steel strip which is bent and then welded. According to the weld form is divided into straight seam welded pipe and spiral welded pipe. According to its use, it is divided into general welded pipe, galvanized welded pipe, oxygen blown welded pipe, wire casing, metric welded pipe, roller pipe, deep well pump pipe, automobile pipe, transformer pipe, electric welded thin-wall pipe, electric welded special-shaped pipe and spiral welded pipe.

Ordinary welded pipe

Common welding pipe to transfer low pressure fluid. Made of Q195A, Q215A, Q235A steel. It can also be made of other mild steels which are easy to weld. Water pressure, bending, flattening and other experiments should be carried out on the steel pipe, which has certain requirements on the surface quality. Usually, the delivery length is 4-10m, and the delivery length is usually fixed (or multiple) feet. Specifications of welded pipes are expressed in nominal diameters (mm or inches). The nominal diameters differ from the actual ones. According to the specified wall thickness of welded pipes, there are ordinary steel pipes and thickened steel pipes.

No welding machine and wire sleeve high frequency resistance straight seam welding pipe, no need to do grounding wire, no need to brush paint, save the traditional fusion welding and wire and other complex construction procedures. Just connect the straight pipe joint to the pipe, and the threaded pipe joint to the theoretical weight of the round steel pipe and the junction box. After positioning, use a special tool to tighten (break) the screw, and use a lock to tighten the joint welding with the high-frequency resistance of the junction box. The pipe bender can be used to bend the corresponding radian on site.


Zhishang Steel Co., Ltd

ABOUT USOverviewThe company mainly deals in color-coated, galvanized, stainless steel pipes, stainless steel coils, stainless steel plates of various materials; hot-rolled series of rebar, medium and heavy plates, coils, I-beams, angle steels, channel steels, H-beams and other steel products and deep processing Service. (The company’s annual invent···

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