Lateral Displacement
Lateral displacement between two pipes to be joined cannot be accommodated by a single Coupling. Two Couplings must be used and a small centre piece of pipe may be allowed to articulate the take up displacement.
Method of calculating length of the centre pipe.
| Pipe nominal diameter (mm) | Minimum Length (mm) |
|---|---|
| Up to 457 OD | Displacement Y x 10 |
| Over 457 to 610 OD | Displacement Y x 12 |
| Over 610 to 762 OD | Displacement Y x 15 |
| Over 762 to 1219 OD | Displacement Y x 20 |
| Over 1219 to 1829 OD | Displacement Y x 30 |
| Over 1829 OD | Displacement Y x 60 |
EXAMPLE
Pipe OD=762mm
Lateral displacement to be accommodated = 180mm
Minimum closing length = 180 x 15 = 2700mm
N.B. For KLAMFLEX Flange Adaptors these lengths must be doubled.
