THERMAL EXPANSION AND CONTRACTION :
ASTRAL DRAINMASTER piping system will undergo thermal expansion and contraction like any other thermoplastic materials. The thermal expansion & contraction depends on the co-efficient of thermal expansion (5.4 × 10¯5 mm / mm /ºC for PVC), length of piping and temperature difference encountered by the piping. Normally for drainage & sewerage system temperature difference of atmosphere will effect more to thermal movement of piping rather than effluent temperatures as full bore discharges are normally not happened for prolong time and also these discharges are periodic in nature. Still expansion & contraction issue needs to be addressed. For solvent weld systems. Change in direction, offset or expansion loops are recommended while for ring-fit joining systems specially designed rubber rings and proper joining of pipes and fittings will take care of length change. Please refer joining method section of this catalog for more details.
Take all reasonable care when handling ASTRAL DRAINMASTER uPVC pipes particularly in very cold conditions when the impact strength of the material is reduced.
- Do not throw or drop pipes, or drag them along hard surfaces.
- In case of mechanical handling, use protective slings and padded supports. Metal chains and hooks should not make direct contact with the pipe.
ON-SITE STORAGE :
Stack pipe lengths: Either on a flat base or on level groundor on 75mm × 75mm timber at 1 meter maximum centers. Provide side support with 75mm wide battens at 1mtrcenters (as show in figure)ideally, stacks should contain one diameter pipe size only. Where this is not possible, stack largest diameter pipes at base of stack. Small pipes may be nested inside larger pipes.Store all materials in well ventilated, shady conditions.If stored in the open for long periods or exposed to strong sunlight, cover the stack with opaque sheeting.Store fittings under cover. Do not remove from cartons or packaging until required.Store solvent cement and cleaning fluid in a cool place out of direct sunlight and away from any heat source.