... . Size: DN15-DN2500. ASTM a182 f316l flanges The specification is as follows:1-American Standard:ANSI B 16.5, ASTM, ASA, API ... , DIN2544, DIN2566, DIN2634, DIN2545, PN6, PN10, PN16, RST37.2, CC22.8 etc.;3-British Standard:BS4504, NP16, NP25, NP40, BS10, TABLE D ... , 6084, 6089, 6090, 2544, 2282, 6091-6093;EN1092, PN6, PN10, PN16, PN25, PN40, TYPE1, TYPE2, TYPE5, TYPE12, TYPE13, GOST12820-80, 12821 ...