... flanges The specification is as follows:1-American Standard:ANSI B 16.5, ASTM, ASA, API-605, AWWA-C207, MSS-SP44, A105 ... , SF440, 5K, 10K, 16K, 20K, 30K, SDPFF, SOHFF, BLFF etc.5-Other standard:UNI2276, 2277, 2278, 6084, 6089, 6090, 2544, 2282 ... , Slip-on Flanges, Blind Flanges, Threaded Flanges, Lap-Joint Flanges, Socket Welding Flanges;OD Size: 1/2 inch -40 inches;Material ...