LOOSE FLANGE 1.Size:15-1200(1/ ... Flange, Flat Flange, Slip on Flange, Welding Neck Flange, Long Welding Neck Flange, Blind Flange, Socket Welding Flange, Thread Flange, Screwed Flange, Lap Joint Flange( ... Material: Carbon steel flanges ASTM A105, ASTM A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2ASTM A694 F42, F46, F48, ... F316H, F310, F321F44 (UNS S31254) Alloy Steel flanges ASTM A182 F1, F5a, F9, F11, F12, F22, ...