... .5 SO, WN, bland flange(class150-1500). Size:1/2"-80" WT:150-2500lbs ClassA-E Material:cs,alloy steel, ss ... ,CE size 1/2" to 24" ASME B16.526"to 80" ASME B16.47TypeWNF, SO, SWF, BL, OF,LF,PLFaceRF, FF ... .GOST FLANGESTYPES:Plate Flanges(GOST12820-80); Blind Flanges(GOST12836-67); Wedling neck Flanges(GOST12821-80); Steel Butt-Welded Flanges GOST12821-80Pressure Class:PN=0 ...