... 4.API6A Type B Flange Size1/2"-72"TypeWeld Neck, Slip-On, Blind, Socket Weld, Lap Joint, ... customers require. Din FlangeSizeDN10-DN2000TypeBlind flangesDin2527Flat flangesDin2573,2576Welding neck flangesDin2631,2632,2633,2634,2635,2636,2637,2638Lapped ... ,2653,2655,2656Threaded flangesDin2565,2566,2567,2568,2569Long neck welding flangesDin28115MaterialsCarbon SteelA105/RST37.2/C22.8Stainless Steel ...