Product Standards of Welded Steel Pipe

The blanks used for welded steel pipes are steel plates or strip steels. According to different welding processes, they are divided into furnace welded pipes, electric welded (resistance welded) pipes and automatic arc welded pipes. According to different welding forms, they are divided into straight seam welded pipes and spiral welded pipes. According to different end shapes, they are divided into round welded pipes and special-shaped (square, flat, etc.) welded pipes. Due to different materials and uses, welded pipes are divided into the following several varieties:

GB/T3091-2008 (Welded steel pipes for low pressure fluid transportation): It is mainly used for transporting water, gas, air, oil and heating hot water or steam and other general low-pressure fluids and pipes for other uses. The representative material is: Q235A grade steel.

GB/T14291-2006 (Welded steel pipe for mine fluid transportation): It is mainly used for straight seam welded pipes for mine compressed air, drainage and axial gas drainage. The representative materials are Q235A and B grade steels.

GB/T12770-2002 (Stainless steel welded pipe for mechanical structure): It is mainly used for machinery, automobiles, bicycles, furniture, hotels and restaurants decoration and other mechanical parts and structural parts. The representative materials are 0Cr13, 1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb, etc.

GB/T12771-1991 (Stainless steel welded pipe for fluid transportation): It is mainly used for transporting low-pressure corrosive media. The representative materials are 0Cr13, 0Cr19Ni9, 00Cr19Ni11, 00Cr17, 0Cr18Ni11Nb, 0017Cr17Ni14Mo2, etc.

In addition, there are welded stainless steel pipes for decoration (GB/T 18705-2002), welded stainless steel pipes for building decoration (JG/T 3030-1995), and welded steel pipes for heat exchangers (YB4103-2000).

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