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New steel pipe knowledge
Welded pipe commonly used materials: Q235A, Q235C
Q235B, 16Mn, 20#, Q345, L245, L290, X42, X46, X60, X80, 0Cr13, 1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb, and the like.
The blanks used for welded steel tubes are steel plates or strips, which are classified into furnaces, electric (resistance) tubes and automatic arc tubes because of their different welding processes. Because of its different welding methods, it is divided into two types: straight seam welded pipe and spiral welded pipe. Because of the shape of its end is divided into round welded pipe and shaped (square, flat, etc.) welded pipe. Welded pipes are divided into the following categories due to their different materials and uses:
GB/T3091-2001 (galvanized 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. Its representative material is: Q235A grade steel.
GB/T14291-2006 (mine fluid transport welded steel pipe). It is mainly used in mine pressure air, drainage, axial gas pipelines and straight seam welded steel pipes. Its representative material Q235A, B grade steel. GB/T14980-1994 (large diameter welded steel pipe for low pressure fluid delivery). Mainly used for conveying water, sewage, gas, air, heating steam and other low-pressure fluids and other uses. It stands for Q235A grade steel.
GB/T12770-2002 (stainless steel welded pipe for mechanical structures). Mainly used for machinery, automobiles, bicycles, furniture, hotel and restaurant decoration and other mechanical parts and structural parts. Its representative material 0Cr13, 1Cr17, 00Cr19Ni11, 1Cr18Ni9, 0Cr18Ni11Nb and so on.
GB/T12771-1991 (stainless steel welded pipe for fluid transport). It is mainly used for conveying low-pressure corrosive media. Representative materials are 0Cr13, 0Cr19Ni9, 00Cr19Ni11, 00Cr17, 0Cr18Ni11Nb, 0017Cr17Ni14Mo2 and so on.
In addition, welded stainless steel tubes for decoration (GB/T), stainless steel welded tubes for building decoration (JG/T 3030-1995), large-diameter electric-welded steel tubes for low-pressure fluid transportation (GB/T 3091-2001), and Heat exchanger welded steel pipe (YB4103-2000).
The above standard information for welded steel pipe products is provided.