... . Size: DN15-DN2500. ASTM a266 gr.4 flangeThe specification is as follows:1-American Standard:ANSI B 16.5, ASTM, ASA, API-605, ... 1500LB, 2500LB, WNRN, SORF, BLRF, THRF, SWRF, LJRF, 2-German Standard:DIN2573, DIN2572, DIN2576, DIN2631, DIN2632, DIN2633, DIN2502, DIN2543, DIN2544, ... Welding Flanges;OD Size: 1/2 inch -40 inches;Material: Carbon Steel, Stainless Steel and Special Alloy Steel;Pressure:75 ...