This document specifies materials and the general aspects of polyethylene (PE) pressure piping systems (mains and service pipes) for buried or above ground applications, intended for the conveyance of water for human consumption, raw water prior to treatment, drains and sewers under pressure, vacuum sewer systems, and water for other purposes, with the exception of industrial application. NOTE 1 For PE components intended for the conveyance of water intended for human consumption and raw water prior to treatment attention is drawn to Clause 6 of this document. Components manufactured for water for other purposes, drains and sewers, and vacuum systems are possibly not suitable for water supply for human consumption. NOTE 2 Industrial application is covered by EN ISO 15494 [6]. The intended use includes sea outfalls, laid in water and pipes suspended below bridges. It also specifies the test parameters for the test methods referred to in this document. In conjunction with EN 12201-2, EN 12201 3, EN 12201 4 and EN 12201 5, this document is applicable to PE pipes, fittings and valves, their joints and joints with components of PE and other materials intended to be used under the following conditions: a) allowable operating pressure, PFA, up to 25 bar ; b) an operating temperature of 20 °C as a reference temperature. NOTE 3 For applications operating at constant temperatures greater than 20 °C and up to and including 50 °C, see Annex A. The EN 12201 series covers a range of allowable operating pressures and gives requirements concerning colours. NOTE 4 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 guidance or regulations and installation practices or codes.