GB/T (Seamless) Chinese Standard

 

●Structural pipe GB/T8162 10#, 20#, 35#, 45#, Q345, 20Mn3, 40Mn3, 20Cr, 30Cr, 25CrMo, 35CrMo are mainly used for machining mechanical parts, pipe fittings, etc.

 

● Fluid steel pipe gb/t8163 20#, q295, q345 are mainly used to transport general liquids, gases, dry powder, etc.

 

●Low and medium pressure boiler tubes gb3087 10#, 20# are mainly used for low and medium pressure boiler headers, steam pipes, etc.

 

●High-pressure boiler tubes GB 5310 20G, P11, P12, P91 are mainly used for heated pipes, steam pipes, etc. with working pressure higher than 9.8MPa and working temperature 540~650 degrees Celsius.

 

●Petrochemical cracking tube GB9948 ASME AS21320#, 16Mn, 12CrMo, 12Cr1MoVG, 15CrMo, 15CrMoG are mainly used in petroleum refining cracking furnaces, etc.