... Standard:ASME,BS,GOST,etc API,ISO,CE,etc pipe fittingsSize -- Seamless:from 1/2" to 24" ... JISB2312 JISB2313, BS, GB, ISOMaterial --Carbon steel --ASTM A234WPB,,A234WPC,A420WPL6. 20#,Q235,10#,20#,A3, Q235A ... Cr5Mo, 12Cr1MoV, 10CrMo910,15CrMo, 12Cr2Mo1; ASTM A335 P5, P9, P11, P12, P22, P91 ASTM A860 WPHY 70, WPHY 65, WPHY 60 ... available as the requirement of customer] seamless pipe fittings SCH40