Water Supply Networks
Solid-wall HDPE pressure mains for drinking water supply.
Overview
Trunk mains and distribution networks carrying drinking water under pressure. Made from new food-grade PE 100 material, so the bore does not scale up or rust closed the way iron does.
Specification
- Product range: QFlow Solid-Wall HDPE
- Standard: IS 4984
- Nominal Size: 20 mm to 315 mm OD
- Pressure Class: PN 6 up to PN 20 (SDR 9)
- Standard Code: IS 4984 / ISO 4427
Why HDPE here
- Joints are welded, not gasketed, so the main is one continuous pipe
- The bore stays smooth for decades, so pumping costs do not creep up
- No rust and no cement washing into the water it delivers
Typical deployments
- Urban distribution mains
- Rural Jal Jeevan Mission loops
- Pumping headers
- Secondary residential supply
Specification and site notes
Reading the pressure class
PN is the working pressure the pipe sustains at 20 °C for the design life, and it is set by SDR. Size the network on the operating pressure plus the surge allowance, then pick PN, not the other way round. PN 6 to PN 10 covers most gravity and low-lift distribution; PN 16 and PN 20 belong on pumping headers and hilly zones.
Butt fusion versus electrofusion
Butt fusion is the economical method for straight runs from about 63 mm OD upward and gives a joint as strong as the pipe wall. Electrofusion is for fittings, tie-ins, repairs and constrained trenches where a butt machine cannot be squared up. Both give a fully welded, continuous line with no gasket to age.
Potable water compliance
Specify virgin food-grade PE 100 resin, not reprocessed material. QFlow conforms to IS 4984 and ISO 4427 for potable carriage; test certificates for the despatched batch should accompany every delivery on a drinking water package.
Coils and long runs
Coils can be ordered up to 125 mm OD, though from 63 mm upward the default supply form is 6 m sticks. On rural distribution the coiled sizes are what let a service loop go in with very few joints, and fewer joints means fewer leak paths, which is the whole point on a Jal Jeevan Mission scheme judged on how much water it loses.
FAQ
Is HDPE pipe safe for drinking water?
Yes, when made from virgin food-grade PE 100 resin. QFlow conforms to IS 4984 and ISO 4427 for potable water carriage. The bore does not scale up or leach, so delivered water quality does not degrade over the life of the main the way it does in unlined iron.
What pressure class should a water distribution main use?
Size on the operating pressure plus a surge allowance, then choose PN. PN 6 to PN 10 covers most gravity and low-lift distribution; PN 16 and PN 20 are for pumping headers, rising mains and hilly supply zones.
Butt fusion or electrofusion?
Butt fusion for straight runs from about 63 mm OD upward: it is faster and cheaper and the joint is as strong as the pipe. Electrofusion for fittings, tie-ins, repairs and trenches too tight to square up a butt machine.
What sizes are supplied in coils?
Coils can be ordered up to 125 mm OD. Below 32 mm the pipe ships coiled as standard; from 63 mm upward 6 m sticks are the default and coils are made to order. Coiled supply is why rural service loops under the Jal Jeevan Mission go in with so few joints, and fewer joints is fewer leak paths.
Commonly specified sizes
Related applications
See also
For CAD drawings, compliance certificates and B2B pricing estimates, contact mktg@alom.in.
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