Our thirty years in the forging industry, production standards and materials of the flange States and forgings StandardsizePressureTypeFACEANSI B16.51/2"--24"150#,300#,400#,600#,900#,1500#, 2500#SO,WN,LJ,BL,SW,THRD,PLFF,RF,RTJASME B16.47A\B26"--60"150#,300#,4003,600#,900#SO,WN,LJ,BL,SW,THRD,PLFF,RF,RTJLONG WN1/2"--24"150#,300#,400#,600#,900#,1500#, 2500#WNFF,RFDINDN15-DN2000PN6,PN10,PN16,PN25, ...