The pressure grade and material of the socket pipe.

The pressure grade is divided according to the pressure level: 3000LB, 6000LB, 9000LB or SCH80, SCH160, XXS commonly used to make the material for the common raw materials of carbon steel, stainless steel, alloy steel and so on. Carbon steel is commonly used with Q235, 20#, A105, etc. There are 304, 304L, 316, 316L, 321, 00Cr17Ni14Mo2, etc. The commonly used alloy materials are 15CrMo, 1Cr5Mo, 16Mn, 12Cr1MoV, F11, F22, 10CrMo910 and other materials: copper alloy, nickel alloy, etc.