Welded Pipe And Spiral Welded Knowledge

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Pipe, straight seam welded pipe, spiral welded knowledge
Welded steel pipe, said pipe is made ​​of steel pipe welded plate or strip is curled forming. Welded steel pipe production process is simple, high production efficiency, and many varieties of different specifications, equipment owned, but the general strength is less than seamless steel pipe. Since the 1930s, with the progress of the rapid development of quality steel rolling production, welding and inspection techniques, weld quality improved, increasing number of varieties and specifications of welded steel pipe, and more and more areas instead of pipe joints. Welded steel pipe according to the form of a weld is divided into a straight seam welded pipe and spiral welded pipe.

Welded steel blank plate or strip, the welding process is divided into the stove pipe, welding (resistance welding) pipe and automatic arc welded pipe. Because of its divided into Longitudinal and spiral welded pipe two. Because of the shape of the end into the pipe of circular welded pipe and shaped (square, flat, etc.). Pipe because of its material and use different number ...
... of species divided into the following:

GB/T3091-1993 (low pressure fluid galvanized welded steel pipe). Mainly used for conveying water, gas, air, oil, and heating hot water or steam and other generally low pressure fluid, and other uses tube. The representative of material Q235A grade steel.

GB/T3092-1993 (low pressure fluid galvanized welded steel pipe). Mainly used for conveying water, gas, air, oil, and heating hot water or steam and other generally low pressure fluid, and other uses tube. The representative of material: Q235A grade steel.

GB/T14291-1992 (mine liquid welded steel pipe). Mainly used for mine air pressure, drainage, and the shaft to put gas straight seam welded steel pipe. Representative of material Q235A, B grade steel. GB/T14980-1994 (low pressure fluid with a large diameter welded steel pipe). Low-pressure fluid for conveying water, sewage, gas, air, heating steam and other purposes. The representative of material Q235A grade steel.

GB/T12770-1991 (mechanical structure of stainless steel welded pipe). Mainly used for machinery, automobiles, bicycles, furniture, hotels and hotel decoration, and other mechanical components and structural parts. Its representative material 0Cr13 1Cr17, 00Cr19Ni11 1Cr18Ni9, 0Cr18Ni11Nb etc.. www.mkplum.com