21/30432487 DC

This standard 21/30432487 DC BS EN 12201-4. Plastics piping systems for water supply, and for drainage and sewerage under pressure. Polyethylene (PE) is classified in these ICS categories:

• 23.040.20 Plastics pipes
• 23.060.01 Valves in general

This document specifies the characteristics of valves or valve bodies made from polyethylene (PE) for buried and above ground applications, intended for the conveyance of water for human consumption, raw water prior to treatment, drainage and sewerage under pressure, vacuum sewer systems, and water for other purposes.

It is applicable to isolating unidirectional and bi-directional valves with spigot ends or electrofusion sockets intended to be fused with PE pipes or fittings conforming to prEN 12201‑2 and prEN 12201‑3 respectively.

Valves made from materials other than PE, designed for the supply of water, drainage and sewerage under pressure conforming to the relevant standards can be used in PE piping systems according to EN 12201, provided that they have PE connections for butt fusion or electrofusion ends, including integrated material transition joints, conforming to prEN 12201‑3.

It also specifies the test parameters for the test methods referred to in this document.

In conjunction with Parts 1, 2, 3 and 5 of EN 12201 it is applicable to PE valves, their joints and to joints with components of PE and other materials intended to be used under the following conditions:

1. allowable operating pressure, PFA, up to 25 bar¹⁾

   ¹

   ⁾ 1 bar = 0,1 MPa = 10⁵ Pa; 1 MPa = 1 N/mm².

   ;

2. an operating temperature of 20 °C as a reference temperature;

3. buried in the ground;

4. sea outfalls;

5. laid in water;

6. above ground, including pipes suspended below bridges.

EN 12201 covers a range of allowable operating pressures and gives requirements concerning colours and additives.

This Part of EN 12201 covers valves for pipes with a nominal outside diameter d_n ≤ 400 mm.