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