... , 600Lbs, 900Lbs, 1500Lbs, 2500Lbs, /PN6,PN10,PN16,PN20,PN25,PN40/ Class A, B, C, D, EstandardASME B16.5, ASME B16.47 ... , A182 F12,F11,F22,F5,F9,F91,F1ECT)qualificationISO9001:2008 Quality Mangement System Certificate,ISO 14001 Environment Mangement System Certificate,OHSAS18001 ... ); Steel Butt-Welded Flanges GOST12821-80Pressure Class:PN=0.6--PN10,0 (100 /2)SIZE: 1/2" TO 48 Class 400 14" SO flange