| Code | Flange designation | Nominal diameter (DN) | Diameter of the through hole [d], not more than | Outside diameter [D] | Diameter of the dividing circle of the centers of the holes for the studs [D1] | Diameter of holes for studs [d1] | Number of stud holes [n] | Gasket designation | Carving studs and nuts | The length of the studs 1 | The length of the studs 2 |
| GOST 28919-91 | |||||||||||
| Рр 21 MPa | |||||||||||
| IMZ-20.004.00 | 65х21 | 65 | 65 | 245 | 190,5 | 28 | 8 | П27 | М24 | 170 | 130 |
| Рр 35 MPa | |||||||||||
| IMZ-20.009.00 | 50х35 | 50 | 52 | 215 | 165,0 | 25 | 8 | П24 | М22 | 160 | 120 |
| IMZ-20.010.00 | 65х35 | 65 | 65 | 245 | 190,5 | 28 | 8 | П27 | М24 | 170 | 130 |
| Рр 70 MPa | |||||||||||
| IMZ-20.011.00 | 65х70 | 65 | 65 | 230 | 184,0 | 25 | 8 | БХ153 | М22 | 160 | 120 |
| IMZ-20.005.00 | 80х70 | 80 | 78 | 270 | 216,0 | 28 | 8 | БХ154 | М24 | 180 | 130 |
| IMZ-20.006.00 | 100х70 | 100 | 103 | 315 | 258,5 | 32 | 8 | БХ155 | М27 | 240 | 150 |
| Рр 105 MPa | |||||||||||
| IMZ-20.008.00 | 80х105 | 80 | 78 | 288 | 230,0 | 32 | 8 | БХ154 | М27 | 200 | 140 |
| IMZ-20.007.00 | 100х105 | 100 | 103 | 360 | 290,5 | 39 | 8 | БХ155 | М36х3 | 250 | 160 |