Installation Guide

Inspection

Pipes and fittings should be visually checked for any damage immediately prior to installation.

• It is recommended that a pre-installation meeting between the pipe installer and a technical engineer from ASSET International Ltd should always take place.

Trench preparation

The trench should not be opened too long in advance of pipe laying and should be backfilled as soon as possible. It is essential to ensure that the sides of the trenches are adequately supported, and to minimise a possible hazard, a trench should be open for the minimum time practicable.

Bedding should be properly compacted and finished so as to provide uniform support for the pipe. It is essential that bricks or other hard materials are not placed under the pipes for permanent support.

Pipe laying

The pipes should be jointed in the trench and laid on the prepared bed so that the barrel of the pipe maintains substantially continuous contact. Small depressions should be made to accommodate the pipe sockets or couplings. Once the joint is complete, these depressions should be carefully infilled, taking care that no voids remain under or around the joint.

Traffic, including heavy construction vehicles, should not be allowed to pass over pipes without suitable protection to the pipes. Care should be taken to prevent pipes from deviating from their design level and line due to flotation prior to backfilling.

Welding of WEHOLITE pipes

• The filler rod used to weld joints on WEHOLITE pipe is manufactured by Simona UK Limited.

• Welding should be carried out using a Munsch SKR Plastotherm Hand Extruder or similar welding machine.

• The fusion weld is performed at temperatures between 180˚C and 275˚C.

Final inspection An ASSET International Ltd appointed person will make a formal inspection along with a representative of the installer after completion of welding. Providing the joints are satisfactory the welders QC sheets will be countersigned by the representative and formally handed over to ASSET International Limited's client.