... 0, 1.6, 2.5, 4.0, 6.4, 10.0, 16.0, 25.0, 32.0, 40.0, Mpa ... 2) American Flange System: U.S. ANSI B16.5 ANSI B16. ... etc.. a,Nominal pressure: 150psi (2.0Mpa), 300psi (5.0Mpa), 400psi (6.8Mpa), 600psi (10.0Mpa), 900psi ( ... ~GB9123?4-2000) American Standard:ANSI B16.5 Class150\300\600\900\1500(WN\SO\BL ... JB4707-2000 B16.47A/B B16.39 B16.48 slip on welding neck flanges