Flange Mode:W.N,S.O,S.W, B.L,P. ... .5 24Iinch-48inch ANSI B16.11 CL150,CL300,CL600,CL900 Flange 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.