ASME/ANSI B16.5, ASME/ANSI B16.36, ASME/ANSI B16. 47 SERIES A (MSS SP-44), SERIES B (API 605), BS4504, EN1092-01, AWWA C207, UNI 2276-67, DIN, JIS, BS 10:1962, IS:6392-1971, API 6A etc.
ASA (150#, 300#, 400#, 600#, 900#, 1500#, 2500#), BS 4504/EN 1092-01- (PN2.5, PN6, PN10, PN16, PN25, PN40, PN63/64, PN100, PN160, PN250, PN320, PN400), (JIS B2220, B2210), (UNI 2276-67, 2278-67, 2278-67), (IS TABLE 5, 11, 17), BS 10 (TABLE D,E,F,H,J,K,R), DIN (2576, 2527, 2641, 2642, 2638, 2628, 2629, 2630, 2631, 2632, 2633, 2634, 2635, 2627, 28115) AWWA (C207 Class B, D, E ), API 6A (2000PSI, 3000PSI, 5000PSI, 10000PSI), SAE Flanges 3000PSI, 6000PSI etc.