... /alloy steel 4.ISO9001 ISO14001 CE 5.competitive price GB/T12459 carbon steel SO flanges1)welding neck , slip ... , 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 ... disk ,and unconventional parts, our forging flanges consist of 30 specifications derived from 7 standards, i.e. ANSI ,API ...