PVC - or uPVC 1

[BRIS]

We have a design and build contract for an irrigation project. Water is from deep ground water with a temperature of 32.5 degree Centigrade.

Supply is to farm hydrants at a pressure of 4 bar. Supply into the pipeline network is through pressure regulating valves and I am concerned that leakage through the valves will result in static pressures of up to 12 bar.

The contract calls for PVC and uPVC pipe but does not specify what is to be used where.

The pressure ratings for the pipe are not specified but for the temperatures of 32.5 the pressure will have to be derated by 40%.

I can only find data on uPVC water pipe. I am looking for advice on PVC and whether it is more suited to the conditions than u-PVC.

 

[stanier]

You will find PVC-C Chlorinated PVC used in building services
PVC-O Orientated PVC which is used in water transimission lines
PVC-M Modifed PVC used in water transmission lines

However from what you describe it is PVC-U that has been specified. Yes you will need to derate the pipe for temperature.

All have different properites and should be covered by your national or are covered by ISO standards.

Australian standards can be bought over the internet from

http://www.standards.com.au

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