INSTALLATION PROCEDURE FOR uPVC & CPVC PIPES

Transportation and Handling

  • Pipes shall be transported carefully without imparting any damage to it.
  • While unloading, pipes should not be dragged or dropped from height to avoid damage.

Inspection before Jointing

  • Before laying, the outside and inside surfaces of pipes and fittings have to be inspected carefully for cracks, gauges or any other damages.
  • Pipes must be cut using fine hand saw or circular saw and the cut end shall be square.
  • Blurs and chips shall be thoroughly cleaned from the cut ends.

Jointing of Pipes

  • Use uPVC solvent for uPVC pipes and CPVC solvent cement for CPVC pipes for jointing.
  • Before applying solvent cement, square the pipe ends, chamfer and remove dirt on the outer and inner surfaces of pipes and fittings.
  • Check dry fit of the pipe in the fittings. Pipe should easily go 1/3rd of the way into fittings.
  • Apply liberal coat of cement on pipe & thin coat of cement inside the fitting.
  • Excess solvent cement inside the fitting can cause weakening and premature failure of pipe or fitting.
  • Assemble parts QUICKLY. Cement must be fluid.
  • For having leak proof joints, the pipe shall enter up to half the length of the socket.
  • Push the pipe fully into the fittings and rotate the pipe ¼ turn and hold tight for 30 seconds to avoid push out and for initial setting.
  • A proper solvent cement joint shall have a uniform solvent cement bead at the joint. If no beads are found, disassemble and refit by applying sufficient quantity of solvent cement.

Laying of Pipes

  • While laying pipes externally, proper clamps shall be provided at 1.0 to 1.5 meter intervals as support. Never overtight the clamps, which will restrict the longitudinal free movement of pipes due to thermal expansion.
  • Never lay pipe in a single line for more than 3 meters. It is recommended to provide expansion loop, off set in direction or changing direction by 90 degree to avoid bending of pipes due to thermal expansion.
  • Provide proper air vent while laying pipes in hilly area to avoid negative pressure.
  • Recommended water temperature for uPVC Pipe is +1ᵒC to + 45ᵒC
  • Recommended water temperature for CPVC Pipe is +1ᵒC to + 82ᵒC

STORAGE, STACKING AND HANDLING OF UPVC PIPES

  • In tropical conditions, pipes should be stored in shades.
  • Pipes should be stored on a reasonable flat surface free from stone and sharp projections and supported throughout its length.
  • In storage, pipe racks should provide continuous support and sharp corners of metal racks should be avoided.
  • Pipes should not be stacked in large piles especially under warm temperature conditions.
  • Pipes stacked should not be more than 1.5 meter in height.
  • Socketed pipes should be stacked in layers such that, socket ends of the pipes in alternate layers are in opposite directions.
  • Pipes should not be stored one inside another pipe.
  • Pipes of different sizes and classes should be stacked separately.
  • Pipes should not be stacked in stressed or bent condition or near to source of heat.
  • Care shall be exercised in handling these pipes in wintry conditions as these become brittle in very cold weather.
  • Practice of first in first out should be adopted for dispatch of pipes to the extent possible
  • Pipe ends should be protected from abrasion.