... 1/2" to 80" (DN15 to DN20005)Special designavailable as the requirements of customer6)Certificates: the TUV CERT ,ISO9001 - 2000, WO , PED.7)Standard ... the ASTM, BS, DIN, JIS, EN, GB and customer's request.Ding Xiang county Wan Tong Pressure & Forging company LTD . engaged inforging of varieties of ... , i.e. ANSI ,API ,MSS ,AWWA , DIN ,JIS ,BS as well as GB ,which size 1/2"(DN15) to 80"(DN2000),And ...