This part of prEN 17176 specifies the characteristics of solid-wall elbows, double sockets, repair couplings and reducers fittings made from oriented unplasticized poly(vinyl chloride) (PVC-O) for piping systems intended for water supply and for buried and above-ground drainage and sewerage under pressure and irrigation under pressure.
NOTE 1 The scope of this part is restricted to fittings on the market during the preparation of this standard. Therefore tees, flange adaptors, etc., are excluded from this version of the standard.
It also specifies the test parameters for the test methods referred to this part of prEN 17176.
In conjunction with prEN 17176-1, prEN 17176-2 and prEN 17176-5, it is applicable to oriented PVC-O fittings and to joints with components of PVC-O, PVC-U (EN ISO 1452 3), other plastics and non-plastics materials such as cast iron fittings (EN 12842) intended to be used for the following:
a) water mains and services lines in the ground;
b) conveyance of water for both outside and inside buildings;
c) drainage, sewerage and treated waste water under pressure;
d) irrigation under pressure.
It is applicable to piping systems intended for the supply of water under pressure up to and including 25 °C (cold water) intended for human consumption and for general purposes as well as for waste water and water for irrigation under pressure.
This part of prEN 17176 specifies fittings for the conveyance of water intended for human consumption, waste water and water for irrigation up to and including 45 °C. For temperatures between 25 °C and 45 °C, prEN 17176-2:2017, Figure C.1 applies.
The piping system according to this European Standard is intended for the conveyance of cold water up to pressures of 25 bars and especially in those applications where special performance requirements are needed, such as impact loads and pressure fluctuations, up to pressure of 25 bar.
This part of prEN 17176 specifies a range of fittings sizes and pressure classes and gives a requirement and recommendations concerning colours.
NOTE 2 It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects, taking into account their particular requirements and any relevant national regulations and installation practices or codes.