... C22.8/P250GH, A105/SS400. Size: DN15-DN2500. ASTM a105 blind flange The specification is as follows:1-American Standard:ANSI B ... DIN2576, DIN2631, DIN2632, DIN2633, DIN2502, DIN2543, DIN2544, DIN2566, DIN2634, DIN2545, PN6, PN10, PN16, RST37.2, CC22.8 etc.;3-British Standard ... 2277, 2278, 6084, 6089, 6090, 2544, 2282, 6091-6093;EN1092, PN6, PN10, PN16, PN25, PN40, TYPE1, TYPE2, TYPE5, TYPE12, TYPE13, ...