... 2.Stainless steel 3.Certification:ISO9001:2008,TUV 2010 PED2010 ANSI Stainless Steel(SS)304 LB1501. Type: WN, SO ... carbon steel, stainless steel and alloy steel flange3. Standard: ANSI, JIS, BS, DIN, UNI, EN, GB, AWWA, ... API, MSS,4. Size: DN15 to DN2000 5. Pressure: PN6-1606. ... 1.Material 2.Material Sectioning 3. Heating 4. Forging 5. Heat Treatment 6.Cutting7. Inspection