... -97, MSS-SP-79,JIS B2316 material Carbon steel(ASTM A105, Q235,A350LF2,A350LF3,) Stainless steel(ASTM A182 F304, F304L,F316,F316L,F321 ... , A182, F43, A276 S32750,A705 631,632,A961, A484, Alloy steel(ASTM A694 F42,F46,F52,F56,F60,F65,F70, A182 ... :2008 ,ISO 14001 OHSAS18001 acquired the license for manufacturing special pressure Pipline equipments from AQSIQ , API and became a member of ...