... ) Standard: ANSI B16.5, B16.47, MSS, SP-44, AWWA, API, DIN, JIS, HG, GB, JG Specifications 1)welding neck , slip - on ,socket ... customer6)Standard: ANSI B16.5, B16.47, 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