... Type : WNF, SO, SWF, BL, OF,LF,PL a105 gr b flange size 1/2" to 24" ASME B16.526"to ... , 1500Lbs, 2500Lbs, /PN6,PN10,PN16,PN20,PN25,PN40/ Class A, B, C, D, EstandardASME B16.5, ASME B16.47, ASME B16 ... , etcSpecial design available as the requirement of customer a105 gr b flange