... 80" (DN15 to DN20005)Special designavailable as the requirements of customer6)Certificates: the TUV CERT ,ISO9001 - 2000, ... Tong Pressure & Forging company LTD . engaged inforging of varieties of flange, axis , disk ,and unconventional parts, ... , DIN ,JIS ,BS as well as GB ,which size 1/2"(DN15) to 80"(DN2000),And we have ... and PED. We have approved the audit of ISO9001-2000 . We have exported flanges to ...