21/30432481 DC

This standard 21/30432481 DC BS EN 12201-2. 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

This document specifies the characteristics of pipes 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.

For use in contaminated soils special consideration is taken for pipes intended for the transport of water intended for human consumption or raw water prior to treatment.

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

In conjunction with Part 1 and Parts 3 to 5 of EN 12201, it is applicable to PE pipes, 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 bar ¹⁾

   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 series covers a range of allowable operating pressures and gives requirements concerning colours.

This document specifies three types of pipe:

1. PE pipes (outside diameter d_n) including any identification stripes;

2. PE pipes with co-extruded layers on either or both the outside and/or inside of the pipe (total outside diameter d_n) as specified in Annex B, where all layers have the same MRS rating. A coextruded pipe made of a combination of PE 100 and PE 100-RC layers are regarded as PE 100 and marked accordingly.

3. PE pipes (outside diameter d_n) with a peelable, contiguous thermoplastics additional layer on the outside of the pipe (‘coated pipe’) as specified in Annex C.