... to 72 From 1/2 to 30 (Seamless Pipe Fittings),Form16 to 72(Seam Pipe Fittings)ScheduleSCH STD, XS, XXS, SCH 10 ~ SCH 160 ... A234 WPB, WPC; ASTM A420 WPL9, WPL3, WPL6, WPHY-42WPHY-46, WPHY-52, WPHY-60, WPHY-65, WPHY-70,2 ALLOY STEELASTM A234 WP1, WP11, WP12 ... ,GB, SH, HG,QOST,ETC.CE and certification:ISO9001:2000 , API , BV , SGS, LOIYDApplications range: Petroleum, chemical, power, gas, metallurgy, ...