Counter flange Technical characteristics Parameter Rr, MPa DN, mm D, mm Dsh, mm Dк, mm Do, mm h, mm GOST / RD Operating pressure 14 65 195 160 92 22 27 RD 26-16-40-89 65 195 149 101.6 22 37 GOST 28919-91 21 65 195 160 90 22 40 RD 26-16-40-89 65 245 190.5 107.9 28 50 GOST 28919-91 80 242 190.5 123.8 25 46 GOST 28919-91 100 292 235 149.2 32 53 GOST 28919-91 35 65 195 160 90 22 56 RD 26-16-40-89 65 245 190.5 107.9 28 50 GOST 28919-91