ANSI Carbon steel PL LB2500 1Type:Carbon steel flange 2Material:Carbon steel 3.Cert:ISO9001:2008,TUV2010,PED2010 ANSI Carbon steel PL LB25001. Type: WN, SO, SW, LJ, BL ... ,LWN, Orifice Flanges and Non-Standard flanges 2. Material: carbon steel, stainless steel and alloy steel flange3. Standard: ANSI, JIS, BS, DIN, UNI, EN ...