Installation Manual - Future Pipe Industries

8. Mechanical couplers
Before starting the assembly of a mechanical coupler check if all safety precautions have been taken and all necessary
tools and materials are available. See chapter 12 and 8.1.
8.1. Tools for mechanical couplers
For Straub and Taylor Kerr: - Allen key and torque wrench.
For Dresser, Viking Johnson and Inland couplers: - ring spanner.
Wavistrong pipes have lower torques than steel pipes, depending on the wall thickness.
Contact FPI for more information.
8.2. Mechanical couplers
Mechanical couplers, normally used for steel pipes, can also be used: e.g. Straub, Viking Johnson, Dresser,
Taylor Kerr. However, restraining couplers should not be used as these may damage the Wavistrong pipes.
Fig. 8.2.a.
With these couplers connections between R.T.R.P. and other materials can be made. Reducing couplers are available
for pipes with different outside diameters. When using these type of couplers, the cut R.T.R.P. pipe ends must be sealed
with a resin coating. See lamination instructions. These couplers may also be used for quick repairs of underground
pressure systems.
As these couplers do no provide axial restraint, they must not be used within a specific distance of a change of
direction as this can cause separation of the joint. One of the factors determining this length is the friction value
of the surrounding soil. Adequate fixing of above ground pipe systems is required.
The torques given on the joints do not apply to Wavistrong. For the correct torques, contact Future Pipe Industries.
After installation of Dresser couplers the stopper bolt must be removed and replaced by a plug in order to prevent
damage of the pipe wall.
Wavistrong Installation Manual
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