... 1/2"-100",SCH5-160 3.Grade:310S,309S,316,316L321,304,317,317L,201,904L,Duplex 4.Low ... UNI 2277/2278, DIN 4504Material 310S,310,309,309S,316,316L,316Ti,317,317L,321,321H,347,347H,304, ... Welding Neck Flange, Long Welding Neck Flange, Blind Flange, Socket Welding Flange, Thread Flange, Screwed Flange, Lap Joint FlangeConnection ... 4.Package:5.Certificates:6.Cooperation: stainless steel socket welding flange