... up to 72” From 1/2 to 30 (Seamless Pipe Fittings),Form16to 72(Seam Pipe Fittings)ScheduleSCH STD, XS, XXS, SCH 10 ~ ... ,GB, SH, HG,QOST,ETC.CE and certification:ISO9001:2000 , API , BV , SGS, LOIYDApplications range: Petroleum, chemical, power, gas, metallurgy ... ,GB, SH, HG,QOST,ETC.CE and certification:ISO9001:2000 , API , BV , SGS, LOIYDApplications range: Petroleum, chemical, power, gas, metallurgy ...