Pipes and fittings for the distribution of water under pressure. The main application is the distribution of drinking water. The diameters are of medium size (generally between 75 mm and 250 mm). The main characteristic of these pipes is the long term resistance to pressure (assessed according to ISO 9080) which is expressed as the MRS (Minimum Required Stress, see also in FAQ).
The pipes for irrigation have similar geometrical and mechanical characteristics.
Main European Standard: EN-ISO 1452
PVC-O pipes (molecularly oriented PVC) are also available on the market for this application and are covered by ISO 16422.