... class600 3.Material:ASTM A694 F65 4.Standard:ASME B16.5 5.Certificate:API,ISO,CE,eg astm a105n carbon ... flange size 1/2" to 24" ASME B16.5 24"to 80" ASME B16.47TypeWNF, SO, SWF, BL, OF,LF, ... Class A, B, C, D, EstandardASME B16.5, ASME B16.47, ASME B16.36,DIN2505,EtcMaterialCarbon steel(ASTM A105,Q235,A350LF2, ... Flange Blind FlangeWelding Neck Flange ISO certificate ansi standard flange(supplier)