... stainless/alloy steel 4.ISO9001 ISO14001 CE 5.competitive price GB/T12459 carbon steel SO flanges1)welding neck , slip ... F304L, F316,F316L,F321 ,ASTM A350 ,ASTM A181, Q235, 20#, 20Mn ,16Mn, CH2.8, C22.83)Rating : ANSI 150LBS ... , SP-44, AWWA, API, DIN, JIS, HG, GB, JG, BS.8)All the flanges are according to the ... ASTM, BS, DIN, JIS, EN, GB and customer's request.Ding Xiang county Wan Tong Pressure ...