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There are two main types of joints, the " Locked Standard" and "Locked Triduct" joints differ only in the shape of the gasket.The other joint accessories, as well as the method of assembly, are identical for both types of joints.
These locked joints are produced by means of :
Weld bead executed at the works and located at the spigot end of the pipe.
A circular split locking ring, with a convex spherical shape on the outside, and having a roughly trapezoidal section. This ring rests against the weld bead.
A special gland which locks the split ring. This gland is equipped with bolts which grip the socket rim and lock the joint.
| Nominal Diameter (DN) | OD (mm) | P | E (mm) | Bolt | Masses | ||||||
| Standard (mm) | Triduct (mm) | Number | Diameter length (mm) | Gland (kg) | Ring (kg) | Standard Gasket (kg) | Triduct Gasket (kg) | per bolt (kg) | |||
| 80 | 98 | 90 | 84 | 234 | 4 | D2-22X70 | 3.5 | 0.55 | 0.14 | 0.140 | 0.35 |
| 100 | 118 | 92 | 88 | 255 | 4 | 4.8 | 0.48 | 0.20 | 0.165 | 0.35 | |
| 150 | 170 | 98 | 94 | 311 | 6 | 7.5 | 0.93 | 0.29 | 0.235 | 0.35 | |
| 200 | 222 | 104 | 100 | 364 | 8 | 9.5 | 1.50 | 0.38 | 0.390 | 0.35 | |
| 250 | 274 | 104 | 105 | 457 | 6 | D7-27X102 | 21.0 | 2.80 | 0.50 | 0.510 | 0.75 |
| 300 | 326 | 105 | 110 | 516 | 8 | 28.0 | 3.70 | 0.71 | 0.715 | 0.75 | |
| 350 | 378 | 108 | 110 | 570 | 8 | 28.5 | 4.50 | 0.90 | 0.830 | 0.75 | |
| 400 | 429 | 110 | 110 | 618 | 10 | 36.0 | 4.50 | 1.10 | 1.150 | 0.75 | |
| 500 | 532 | 115 | 120 | 734 | 16 | 58.0 | 6.70 | 1.54 | 1.700 | 0.75 | |
| 600 | 635 | 120 | 120 | 840 | 20 | 63.5 | 9.60 | 2.16 | 2.400 | 0.75 | |
