ANSI class 150 to 2500 Anchor Flange 1)Standards: API, ANSI, BS, JIS, UNI, etc 2)Pressure: Class 150 to 2, 500 3)Size: 1/2"-56" Key Specifications/Special Features: Materials: ASTM A105 A350 LF1, LF2 CL1/CL2, and LF3 CL1/CL2 A516.60 A694 (F42, F46, F48, F50, F52, F56, F60, F65, and F70) A182 F304/304L, F316/316L, F316H, F310, and F321 A182 F11 and F22 Manufacturing standards: API, ANSI, BS, JIS, UNI, MSS, and SP Pressure: ANSI class 150 to 2, 500 Size range: 1/2 to 56 inches (DN15 to DN1, 400mm).