welding neck steel flange 1.OD: 1/4''-48'' 2.WT : CL150-CL3000 3.Standard : ASME, GB, DIN, JIS 4.Material :A182 F5 ... , GB, DIN, JIS MaterialA105, A182F5,F9,P11,F12,F22,F91, A182 F304(H),F304L,F316(H), F316L, F321(H)PackagingCustomized packing available ...