There are so many kinds of seamless steel pipe for different purposes.
GB/T8163-1999 (ASTM A53 GR.B Seamless Steel Pipe for conveying fluid). It is mainly used for conveying fluid pipelines on engineering and large-scale equipment. Represents material (brand) 20, Q345, etc.
GB3087-1999 (Seamless Steel Pipe for Low and Medium Pressure Boilers). Mainly used in industrial boilers and domestic boilers to transport low and medium pressure fluid pipelines. The representative material is steel No. 10 and No. 20.
GB5310-1995 (Seamless Steel Pipe for High Pressure Boiler). It is mainly used for high temperature and high pressure conveying fluid headers and pipes on boilers of power plants and nuclear power plants. The representative materials are 20G, 12Cr1MoVG, 15CrMoG, etc.
GB5312-1999 (Seamless Carbon and Manganese Steel Pipe for Ships). It is mainly used for class I and II pressure-resistant pipes for marine boilers and superheaters. The representative materials are 360, 410, 460 grade steel, etc.
GB1479-2000 (Seamless Steel Pipe for High Pressure Chemical Fertilizer Equipment). It is mainly used for conveying high temperature and high pressure fluid pipeline on fertilizer equipment. The representative materials are 20, 16Mn, 12CrMo, 12Cr2Mo, etc.
GB9948-1988 (Seamless Steel Pipe for Petroleum Cracking). It is mainly used in boilers, heat exchangers and fluid pipelines of petroleum smelters. Its representative materials are 20, 12CrMo, 1Cr5Mo, 1Cr19Ni11Nb, etc.
GB18248-2000 (Seamless Steel Pipe for Gas Cylinders). It is mainly used for making various gas and hydraulic cylinders. Its representative materials are 37Mn, 34Mn2V, 35CrMo, etc.
GB/T 17396-1998 (Hot-rolled Seamless Steel Pipe for Hydraulic Pillars). Mainly used to make coal mine hydraulic support and cylinders, columns, and other hydraulic cylinders, columns. Its representative materials are 20, 45, 27SiMn, etc.
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