| Bore (in mm) | Type | Lining Thickness (in mm) min. | Cover Thickness (in mm) min. | Loss in mass on Heating | Adhesion | P. P. (in Mpa) | W. P. (in Mpa) | Bursting pressure (in Mpa) min. | Remarks |
|---|---|---|---|---|---|---|---|---|---|
| 20.0+0.75 | 1 | 1.50 | 1.00 | 4% (Μαχ.) | 1.4KN/m (Minimum) | 0.96 | 0.60 | 1.90 | I |
| 20.0+0.75 | 2 | 1.50 | 1.00 | 4% (Μαχ.) | 1.4KN/m (Minimum) | 1.60 | 1.00 | 3.15 | NI |