... .Certification:ISO9001:2008,TUV 2010, PED20 Weld Neck Carbon Steel Flange:1.Type:Carbon Steel Flange2.Material:Carbon steel3.Certification:ISO9001 ... -2278,UNI6084,UNI6089-6093,UNI2281-2284,ASAS2129 TABLE D TABLE H TABLE EEN1092TYPE01,TYPE02,TYPE05, TYPE11,TYPE12,TYPE13GBGB9112~9125-88 GB ... 5. Heat Treatment 6.Cutting7. Inspection Weld Neck Carbon Steel Flange