... -1/2, EN10253-2 (3) Material: Carbon steel flanges ASTM A105, ASTM A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2ASTM A694 F42, F46 ... , F48, F50, F52, F56, F60, F65, F70 Stainless steel flanges ASTM ... , F316/316L, F316H, F310, F321F44 (UNS S31254) Alloy Steel flanges ASTM A182 F1, F5a, F9, F11, F12, F22, F91(4) Connection ...