... .36, MSS SP44, API6A, BS 4504, EN1092,UNI 2277/2278, DIN 4504Material 310S,310,309,309S,316,316L,316Ti,317,317L ... ,etcTypePlate Flange, Flat Flange, Slip on Flange, Welding Neck Flange, Long Welding Neck Flange, Blind Flange, Socket Welding Flange, Thread Flange, Screwed Flange, Lap Joint ... :3.Photoes:4.Package:5.Certificates:6.Cooperation: stainless steel Welding Neck Flanges