Descripción
Structure seamless steel pipe: GB8162-2008
Transmission fluid with a seamless steel pipe: GB8163-20083, boiler seamless steel pipe: GB3087-2008
High pressure seamless tubes for boilers: GB5310-2008 (ST45.8- type III)
High pressure seamless steel tubes for chemical fertilizer equipment: GB6479-1999
Seamless steel pipe for geological drilling: YB235-70
Seamless steel tubes for petroleum drilling: YB528-65
Seamless steel tubes for petroleum cracking: GB9948-88
Petroleum drill collar special seamless pipe: YB691-70
Seamless steel tube for automobile semi axle: GB3088-1999
Seamless steel tubes for ships: GB5312-1999
Cold rolled precision seamless steel tubes: GB3639-1999
Various alloy tubes 16Mn, 27SiMn, 15CrMo, 35CrMo, 12CrMov, 20G, 40Cr, 12Cr1MoV, 15CrMoc,