Drawing cold rolled precision seamless steel pipe

GB Standard for seamless steel pipe:

Seamless steel pipe for structural purposes:GB8162-2008;Seamless steel tubes for liquid services: GB8163-20083; Boiler seamless steel pipe: GB3087-2008; High-pressure boiler seamless steel pipe: GB5310-2008 (ST45.8-r type); Fertilizer equipment, high pressure stainless steel shower sliding bar set seamless steel pipe: GB6479-1999; Geological drilling seamless steel pipe: YB235-70; Oil drilling seamless steel pipe: YB528-65; Petroleum cracking seamless steel pipe: GB9948-88; Oil drill collar special seamless: YB691-70; Automobile axle seamless steel pipes: GB3088-1999; Seamless steel pipe for ships: GB5312-1999.

Drawing cold rolled precision seamless steel pipe: GB3639-1999; various alloy seamless steel pipe 16Mn, 27SiMn, 15CrMo, 35CrMo, 12CrMov, 20G, 40Cr, 12Cr1MoV, 15CrMo. Compared with the hot-rolled seamless steel pipe, the cold-rolled one is with higher dimensional accuracy.25mm.GB seamless steel pipe is divided into two types: hot rolled seamless steel pipe and cold rolled seamless steel pipe. Cold-rolled seamless steel pipe: the diameter be up to 6mm, wall thickness can be 0.25mm, outer diameter thin-walled tube to 5mm, wall thickness less than 0.Hot-rolled seamless steel pipe: the diameter is generally greater than 32mm, wall thickness 2.5-75mm. In addition, there are also GB / T17396-1998 (hot rolled seamless steel hydraulic prop), GB3093-1986 (diesel engine with high pressure seamless steel pipe), GB / T3639-1983 (cold drawn or cold rolled precision seamless steel tubes), GB / T3094-1986 (cold drawn special shaped seamless steel tubes), GB / T8713-1988 (hydraulic and pneumatic cylinder with precision internal diameter seamless steel pipe), GB13296-1991 (boiler, heat exchanger with stainless steel seamless pipe), GB / T14975-1994 (structure seamless steel pipe stainless steel), GB / T14976-1994 (fluid transport stainless steel seamless pipe) GB / T5035-1993 (automobile axle casing seamless steel pipe), API SPEC5CT-1999 (casing and tubing specifications) and so on. And for cold-rolled steel pipe, besides the types mentioned above in the hot rolled seamless steel pipe, it also concludes carbon thin-walled steel pipe, alloy thin-walled pipe, walled stainless steel pipe and special shaped steel pipe.

Hot-rolled seamless steel pipe generally contains low, medium pressure boiler pipe, high pressure boiler pipe, alloy steel pipe, stainless steel pipe, oil cracking pipe, geological steel pipe and other steel pipe.