... 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, ... NACE & HIC Fittings. FLANGESProduction NameSlip-on welding flange;welding nece flange;socket welding flange;threaded flange;lapped flange;blind ;spectacle ...