... .47, MSS, SP-44, AWWA, API, DIN, JIS, HG, GB, JG Specifications 1)welding neck , slip - on ,socket welding , blind. 2)ASTM A105 ... .47, MSS, SP-44, AWWA, API, DIN, JIS, HG, GB, JG, BS.7)All the flanges are according to the ASTM, BS ... , DIN, JIS, EN, GB and customer's request. slip-on stainless flanges