... :Carbon steel 3.Cert:ISO9001:2008,TUV2010,PED2010 ANSI Carbon steel PL LB25001. Type: WN, SO, SW, LJ, BL, TH, PL,LWN, Orifice Flanges and ... Non-Standard flanges 2. Material: carbon steel, stainless steel and alloy steel flange3. Standard: ANSI, JIS, BS, DIN ...