... B16.5, B16.47, MSS, SP-44, AWWA, API, DIN, JIS, HG, GB, JG Specifications 1)welding neck , slip - on ,socket welding ... , blind. 2)ASTM A105,DIN ST37.2,ASTM A182-F304 F304L 3)ANSI B16.5,BA105,DIN ST37 ... designavailable as the requirements of customer6)Standard: ANSI B16.5, B16.47, MSS, SP-44, AWWA, API, DIN, JIS ... , JIS, EN, GB and customer's request. socket welding stainless flanges