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Seamless tube knowledge

Published:

2022-10-13

Seamless steel pipe is divided into two types: hot rolled (extruded) seamless steel pipe and cold drawn (rolled) seamless steel pipe due to its different manufacturing processes. Cold-drawn (rolled) tubes are also divided into two types of round tubes and shaped tubes. Seamless steel pipe, and because of its different uses and is divided into a number of varieties as follows.

　　Classification of seamless pipes

　　1.GB/T8162-2008 (seamless steel pipe for structural use). Mainly used for general structure and mechanical structure. Its representative materials (grades): carbon steel 20, 45 steel; alloy steel Q345, 20Cr, 40Cr, 20CrMo, 30-35CrMo, 42CrMo, etc.

　　2.GB/T8163-2008 (seamless steel pipe for conveying fluids). Mainly used in engineering and large equipment on the transport of fluid pipeline. The representative material (grade) is 20, Q345, etc.

　　3.GB3087-2008(seamless steel pipe for low and medium pressure boiler). Mainly used for industrial boilers and living boilers to transport low and medium pressure fluid piping. The representative material is 10, 20 steel.

　　4.GB5310-2008(Seamless steel pipe for high pressure boiler). Mainly used in power station and nuclear power station boiler high temperature, high pressure fluid transfer container and pipeline. The representative materials are 20G, 12Cr1MoVG, 15CrMoG, etc.

　　5.GB5312-2009 (carbon steel and carbon manganese steel seamless steel pipe for ships). Mainly used for ship boilers and superheaters with class I, II pressure-resistant tubes, etc.. The representative material is 360, 410, 460 steel grade, etc.

　　6.GB6479-2013 (seamless steel pipe for high pressure fertilizer equipment). Mainly used for fertilizer equipment on the transport of high temperature and high pressure fluid pipeline. The representative materials are 20, 16Mn, 12CrMo, 12Cr2Mo, etc.

　　7.GB9948-2013(Seamless steel pipe for petroleum cracking). Mainly used in petroleum refinery boilers, heat exchangers and their transport fluid pipelines. Its representative materials are 20, 12CrMo, 1Cr5Mo, 1Cr19Ni11Nb, etc.

　　8.GB18248-2008 (seamless steel pipe for gas cylinder). Mainly used for the production of various gas, hydraulic cylinders. Its representative material is 37Mn, 34Mn2V, 35CrMo, etc..

　　In addition, there are GB/T17396-1998 (hot-rolled seamless steel tubes for hydraulic pillars), GB3093-1986 (high-pressure seamless steel tubes for diesel engines), GB/T3639-1983 (cold-drawn or cold-rolled precision seamless steel tubes), GB/T3094-1986 (cold-drawn seamless steel tubes shaped steel tubes), GB/T8713-1988 (hydraulic and pneumatic cylinders GB/T8713-1988(Precision seamless steel pipe with inner diameter for hydraulic and pneumatic cylinder), GB13296-1991(Stainless steel seamless steel pipe for boiler and heat exchanger), GB/T14975-1994(Stainless steel seamless steel pipe for structure), GB/T14976-1994(Stainless steel seamless steel pipe for fluid transportation), GB/T5035-1993(Seamless steel pipe for automobile semi-axial casing), API SPEC5CT-2012 (casing and oil pipe specification), etc.

关键词：

Introduction to the characteristics of steel with good properties

Introduction to metal material process properties terminology

Introduction to the characteristics of steel with good properties

Introduction to metal material process properties terminology