Welded steel pipe knowledge: Welded steel pipe large diameter welded steel pipe Welded steel pipe refers to the use of steel or steel plate bending deformation into a round, square and other shapes and then welded into the surface of the seam steel pipe. Welded steel pipe blanks are steel or strip steel.
Welded steel pipes can be divided into arc welded pipes, high-frequency or low-frequency resistance welded pipes, gas welded pipes, furnace welded pipes, and Bondi pipes according to different welding methods. Welded steel pipe: used for oil drilling and machinery manufacturing. Furnace welded pipe: used as water gas pipe, large-diameter straight seam welded pipe for high pressure oil and gas transmission, spiral welded pipe for oil and gas transmission, pipe piles, bridge piers, etc.
Can be divided into straight seam welded pipe and spiral welded pipe
Straight seam welded pipe: simple production process, high production efficiency, low cost and rapid development. Spiral welded pipe: The strength is generally higher than that of a straight seam welded pipe. A narrower blank can be used to produce a larger diameter pipe. It is also possible to use a blank of the same width to produce a different diameter pipe. However, compared with the straight seam pipe of the same length, the length of the weld seam increases by 30 to 100%, and the production speed is low. Therefore, the smaller diameter welded pipe mostly adopts the straight seam welding, and the large diameter welded pipe adopts the spiral welding.
According to the purpose, it can be divided into general welded pipe, galvanized welded pipe, oxygen welded pipe, wire bushing, metric welded pipe, idler pipe, deep well pump pipe, automotive pipe, transformer pipe, welded thin-walled pipe, welded special-shaped pipe and spiral welded pipe.
(Zinc-coated welded steel pipe for low pressure fluid delivery). Mainly used to transport water, gas, air, oil and heating water or steam and other general low pressure fluids and other uses of the pipe (low pressure fluid transport galvanized welded steel pipe). Mainly used to transport water, gas, air, oil and heating water or steam and other general low pressure fluids and other uses.
Mine fluid transport welded steel pipe). Mainly used for mine pressure wind, drainage, axial gas welding with straight seam welded steel pipe
Since the 1930s, with the rapid development of the production of high-quality strip continuous rolling and the advancement of welding and inspection technologies, the quality of welds has been continuously increasing, and the variety and specifications of welded steel pipes have been increasing, and they have been replaced in more and more fields. Steel pipe. Welded steel pipe has lower cost and higher production efficiency than seamless steel pipe.
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