... 600Lbs, 900Lbs, 1500Lbs, 2500Lbs, /PN6,PN10,PN16,PN20,PN25,PN40/ Class A, B, C, D, EstandardASME B16.5, ASME B16.47 ... Flanges For Welding); TYPE13(Hubbed Threaded Flanges)Pressure ClassPN2.5PN6PN10PN16PN25PN40PN63PN100SIZE: 1/2" TO 48"6.UNI FLANGESTYPES: (PLSOWNBLTH) FLANGESPressure ClassPN0 ... Butt-Welded Flanges GOST12821-80Pressure Class:PN=0.6--PN10,0 (100 /2)SIZE: 1/2" TO 48 Class 400 14" SO flange ...