... GOST 12820-80,12821-80 flanges.2. Forged DIN carbon steel threaded flangeMaterial: Rst37.2, St37.2, C22.8) DIN2573 PN6 ... , DIN2503 PN25 ,PN40, DIN2566 PN10&PN16, DIN2631 PN6, DIN2632 PN10. DIN2633 PN16, DIN2634 PN25, DIN2635 ... UNI2544, UNI2282, UNI6090, UNI6091, UNI6092, UNI6093 flanges6. EN1092 flange PN6, PN10, PN16, PN25, PN40, PN64, PN100, PN160; ... to 48(DN1200) HOT!!! Flange GOST 12821-80 PN6 DN615