... 2.Stainless steel 3.Certification:ISO9001:2008,TUV 2010 PED2010 ANSI Stainless Steel(SS)304 LB1501. Type: WN, SO, SW, LJ ... . Material: carbon steel, stainless steel and alloy steel flange3. Standard: ANSI, JIS, BS, DIN, UNI, EN, GB, AWWA, API, MSS,4 ...