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.
