ANSI B16.5 Flange-Q 1.Flange Mode:W.N,S.O,S.W, B.L,P. ... .5 3.24Iinch-48inch ANSI B16.11 ANSI B16.5 Flange-QFlange Mode:W.N,S.O,S.W, B.L ... ,P.L,Th1 carbon steel flange 2 Standard: ISO ASME,ANSI.API,JIS,JPI .DIN .UNI ... : high-temperature and high-pressure ressistant Special and irregular steel flange available as your customization.