... DIN.ANSI/ASTM /API,NF,GOST,EN,ISO and Non standardSize1/2"-48"TypeSlip-on flanges, Blind flanges, Lap joint flanges, Welding neck flanges, Spectacle flanges,TG flanges ... 2545 welding neck falnge DIN2631, 2632,2633,2634,2635 blind flange DIN 2527 PN6, PN10, PN16, PN25, PN40 threaded falnge ... DIN2565,2566,2567,2567 loose flange DIN 2641,2642,2656, ...