Seamless steel tubes for 1, structure: GB8162-2008 2, the transmission fluid with seam steel pipe: seamless steel tubes for boiler: GB8163-20083, high pressure seamless tube with GB3087-2008 4, boiler: GB5310-2008 (ST45.8- III) high pressure seamless steel tubes for 5, chemical fertilizer equipment: seamless steel tube with GB6479-1999 6, geological drilling: seamless steel tube with YB235-70 7, oil drilling: seamless steel pipe for petroleum cracking, YB528-65 8: GB9948-88 9, petroleum drill collar special seamless pipe: YB691-70 10, half shaft with seamless steel pipe seamless steel tubes with GB3088-1999 11, GB5312-1999 12, pulling the ship: cold rolled precision seamless steel tubes: GB3639-1999 13, 16Mn, 27SiMn, 15CrMo alloy, 35CrMo, 12CrMov 20G, 40Cr, 12Cr1MoV, 15CrMo

In addition, there are GB/T17396-1998 (hydraulic prop hot rolling seamless steel pipe), GB3093-1986 (diesel engine high pressure seamless steel pipe), GB/T3639-1983 (cold drawn or cold rolled precision seamless steel tubes), GB/T3094-1986 (cold drawn seamless steel tube shaped steel pipe), GB/T8713-1988 (hydraulic and pneumatic cylinder with diameter precision seamless steel tube), GB13296-1991 (seamless stainless steel tubes for boiler and heat exchanger), GB / T14975-1994 (structure of stainless steel seamless steel pipe), GB / t14976-1994 (fluid conveying stainless steel seamless pipe) GB/T5035-1993 (automobile half shaft sleeve pipe seamless steel pipe), API SPEC5CT-1999 (casing and Tubing Standard) and other.