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This Part of EN 13244 specifies the characteristics of pipes made from polyethylene (PE) intended for buried and above-ground pressure systems for water for general purposes, drainage and sewerage. It is also applicable for vacuum sewer systems. NOTE 1 Water for general purposes is not intended for human consumption and components conforming to this standard should not be used in systems conveying water for human consumption. For PE components intended for the conveyance of water intended for human consumption and raw water prior to treatment, see EN 12201. It also specifies the test parameters for the test methods referred to in this standard. In conjunction with other Parts of EN 13244 (see Foreword), it is applicable to PE pipes, their joints and to joints with components of PE and other materials intended to be used as follows: -- buried in the ground; -- sea outfalls; -- laid in water; -- above-ground, including pipes suspended below bridges; -- a maximum operating pressure, MOP, up to and including 25 bar; -- an operating temperature of 20 °C as a reference temperature. NOTE 2 For applications operating at constant temperatures greater than 20 °C and up to 40 °C, see annex A of EN 13244-1:2002. EN 13244 covers a range of maximum operating pressures and gives requirements concerning colours and additives. NOTE 3 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. NOTE 4 Assessment of the resistance to slow crack growth of the PE pipe compound used for the manufacture of products to this specification is required in accordance with Table 2 of EN 13244-1:2002.