EN 12666-1:2005/FprA1

Plastics piping systems for non-pressure underground drainage and sewerage - Polyethylene (PE) - Part 1: Specifications for pipes, fittings and the system

This Part of EN 12666 specifies the requirements for pipes, fittings and the system of polyethylene (PE) piping systems intended to be used for  -  non-pressure underground drainage and sewerage outside the building structure (application area code "U"), and -  non-pressure underground drainage and sewerage for both buried in the ground within the building structure (application area code "D") and outside the building structure. This is reflected in the marking of products by "U" and "UD". It also specifies the test parameters for the test methods referred to in this European Standard. This European Standard covers a range of nominal sizes, a range of pipe series/stiffness classes and gives recommendations concerning colours. NOTE 1 It is the responsibility of the purchaser or specifier to make the appropriate selection from these aspects, taking into account their particular requirements and any relevant national regulations and installation practices or codes. In conjunction with CEN/TS 12666-2 [1] it is applicable to PE pipes and fittings, their joints and to joints with components of other plastics and non-plastics materials intended to be used for buried piping systems for non-pressure drainage and sewerage.This European Standard is applicable to PE pipes with or without an integral socket. The fittings can be manufactured by injection-moulding or be fabricated from pipes and/or mouldings. This European Standard is applicable to PE pipes and fittings for the following types of joints: - elastomeric ring seal joints; - butt fused joints; - electrofusion joints; - mechanical joints. NOTE 2 Requirements and limiting values for application area code "D" are given in Tables 3, 6 and Table 12. NOTE 3 Pipes, fittings and other components conforming to any of the plastics product standards listed in the bibliography may be used with pipes and fittings conforming to this European Standard, provided they conform to the requirements for joint dimensions given in Clause 6

Kunststoff-Rohrleitungssysteme für erdverlegte drucklose Abwasserkanäle und -leitungen - Polyethylen (PE) — Teil 1: Anforderungen an Rohre, Formstücke und das Rohrleitungssystem

Systèmes de canalisations en plastique pour les branchements et les collecteurs d'assainissement sans pression enterrés - Polyéthylène (PE) - Partie 1: Spécifications pour les tubes, les raccords et le système

Cevni sistemi iz polimernih materialov za odpadno vodo in kanalizacijo, ki delujejo po težnostnem principu in so položeni v zemljo - Polietilen (PE) – 1. del: Specifikacije za cevi, fitinge in sistem

General Information

• Status: Not Published
• ICS: 23.040.01 - Pipeline components and pipelines in general
• ICS: 91.140.80 - Drainage systems
• ICS: 93.030 - External sewage systems
• Technical Committee: CEN/TC 155 - Plastics piping systems and ducting systems
• Drafting Committee: CEN/TC 155/WG 10 - Systems for non-pressure drainage and sewerage - PE (solid wall)
• Current Stage: 5060 - Closure of Vote - Formal Approval
• Start Date: 14-Jun-2011
• Due Date: 23-Aug-2012
• Completion Date: 14-Jun-2011
• Ref Project: SIST EN 12666-1:2006/oprA1:2010 - Plastics piping systems for non-pressure underground drainage and sewerage - Polyethylene (PE) - Part 1: Specifications for pipes, fittings and the system

Relations

• Merged Into: EN 12666-1:2005+A1:2011 - Plastics piping systems for non-pressure underground drainage and sewerage - Polyethylene (PE) - Part 1: Specifications for pipes, fittings and the system
• Effective Date: 19-Jan-2023
• Amends: EN 12666-1:2005 - Plastics piping systems for non-pressure underground drainage and sewerage - Polyethylene (PE) - Part 1: Specifications for pipes, fittings and the system
• Effective Date: 28-Nov-2009

Overview

EN 12666-1:2005/FprA1 is a European Standard developed by CEN, focusing on plastic piping systems for non-pressure underground drainage and sewerage applications using polyethylene (PE) materials. This part of the standard specifies detailed requirements for PE pipes, fittings, and the overall system designed for buried installations either outside or within building structures. The standard addresses essential aspects such as dimensions, wall thickness, mechanical properties, joint types, and marking, ensuring reliability and compatibility in sewerage and drainage systems that operate under gravity flow without pressure.

This standard is critical for manufacturers, specifiers, engineers, and contractors involved in selecting or installing polyethylene piping systems for non-pressure sewerage applications, promoting safety, quality, and interoperability across European markets.

Key Topics

• Scope and Application Areas:
  Applicable for non-pressure underground drainage and sewerage systems, distinguishing between pipes and fittings used outside buildings ("U") and those buried within or outside buildings ("UD").

• Material Specifications:
  Defines the use of virgin and reprocessable polyethylene material compliant with specific melt mass-flow rate (MFR) requirements according to EN ISO 1133 and CEN/TS 14541, enabling material recyclability and performance consistency.

• Pipe Dimensions and Sizes:
  Covers a wide range of nominal diameters from DN 110 mm up to DN 1600 mm, including recent additions of 560 mm and 710 mm diameter pipes. Wall thickness classifications follow stiffness classes SN 2, SN 4, SN 8, and the newly introduced SN 16 for higher ring stiffness needs.

• Joint Types Covered:
  Standardizes four main types of joints:

  • Elastomeric ring seal joints
  • Butt fused joints
  • Electrofusion joints
  • Mechanical joints
    This diversity supports flexible system design and secure pipeline connections.

• Testing and Performance Requirements:
  Specifies ring stiffness, watertightness, and physical performance tests (EN ISO 9969, EN 1053) vital to long-term durability and function of PE drainage pipes and fittings.

• Marking and Identification:
  Defines minimum marking requirements for traceability and installation ease, indicating nominal size, stiffness class (SDR), and application area codes.

• Compatibility and System Integration:
  Supports interoperability with pipes and fittings made from other plastics or non-plastic materials, as long as joint dimensions conform to the standard. Annex B lists related product standards for PVC-U, PP, ABS, and other PE systems.

Applications

This standard is indispensable for designing, manufacturing, and installing polyethylene piping systems used in:

• Non-pressure sewage conveyance:
  Gravity-based underground drainage for wastewater collection located both outside of buildings and within building structures.

• Stormwater management:
  Efficient and durable piping systems for removing and managing surface water runoff.

• Infrastructure projects:
  Municipal sewer networks, residential and commercial underground drainage systems, and civil engineering works requiring standardized, reliable plastic piping solutions.

• System specification and procurement:
  Enables purchasers and specifiers to select pipes and components based on clearly defined mechanical and dimensional criteria, ensuring compliance with safety and performance regulations.

Using PE materials per EN 12666-1 provides benefits such as excellent chemical resistance, flexibility, durability, and ease of jointing, making the systems cost-effective and long-lasting.

Related Standards

EN 12666-1 aligns with and references the following key standards:

• CEN/TS 12666-2: Guidance for conformity assessment of PE drainage piping systems.
• EN ISO 1133: Determination of melt mass-flow rate for thermoplastics.
• EN ISO 9969: Test methods for ring stiffness of pipes.
• EN 1053: Water tightness testing of fabricated fittings.
• EN 1329-1: PVC-U piping for soil and waste discharge within buildings.
• EN 1401-1: Non-pressure PVC-U underground drainage systems.
• EN 1451-1: Polypropylene soil and waste discharge systems.
• EN 1455-1: ABS piping systems for soil and waste.
• EN 1519-1: Polyethylene piping for soil and waste discharge inside buildings.

These complementary standards ensure system compatibility and comprehensive coverage of non-pressure plastic piping applications in both building and civil engineering environments.

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Keywords: EN 12666-1, polyethylene piping systems, non-pressure drainage, sewerage systems, underground drainage, PE pipes, plastic piping standards, ring stiffness, electrofusion joints, butt fused joints, elastomeric ring seal, non-pressure sewerage, drainage system standards, CEN piping standards, drainage fittings, plastic sewer pipes.

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2010
Cevni sistemi iz polimernih materialov za odpadno vodo in kanalizacijo, ki delujejo
po težnostnem principu in so položeni v zemljo - Polietilen (PE) – 1. del:
Specifikacije za cevi, fitinge in sistem
Plastics piping systems for non-pressure underground drainage and sewerage -
Polyethylene (PE) - Part 1: Specifications for pipes, fittings and the system
Kunststoff-Rohrleitungssysteme für erdverlegte drucklose Abwasserkanäle und -
leitungen - Polyethylen (PE) - Teil 1: Anforderungen an Rohre, Formstücke und das
Rohrleitungssystem
Systèmes de canalisations en plastique pour les branchements et les collecteurs
d'assainissement sans pression enterrés - Polyéthylène (PE) - Partie 1: Spécifications
pour les tubes, les raccords et le système
Ta slovenski standard je istoveten z: EN 12666-1:2005/prA1
ICS:
23.040.01 Deli cevovodov in cevovodi Pipeline components and
na splošno pipelines in general
91.140.80 Drenažni sistemi Drainage systems
93.030 Zunanji sistemi za odpadno External sewage systems
vodo
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
DRAFT
EN 12666-1:2005
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA1
March 2010
ICS 23.040.01; 93.030
English Version
Plastics piping systems for non-pressure underground drainage
and sewerage - Polyethylene (PE) - Part 1: Specifications for
pipes, fittings and the system
Systèmes de canalisations en plastique pour les Kunststoff-Rohrleitungssysteme für erdverlegte drucklose
branchements et les collecteurs d'assainissement sans Abwasserkanäle und -leitungen - Polyethylen (PE) - Teil 1:
pression enterrés - Polyéthylène (PE) - Partie 1: Anforderungen an Rohre, Formstücke und das
Spécifications pour les tubes, les raccords et le système Rohrleitungssystem
This draft amendment is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 155.

This draft amendment A1, if approved, will modify the European Standard EN 12666-1:2005. If this draft becomes an amendment, CEN
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for inclusion of this amendment
into the relevant national standard without any alteration.

This draft amendment was established by CEN in three official versions (English, French, German). A version in any other language made
by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same
status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2010 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12666-1:2005/prA1:2010: E
worldwide for CEN national Members.

EN 12666-1:2005/prA1:2010 (E)
Contents Page
1 Changes to foreword .4
2 Change to Clause 1 Scope .4
3 Changes to Clause 2 Normative references .4
4 Change to 3.3 Abbreviations .4
5 Change to 4.2 Reprocessable and recyclable material .4
6 Changes to 4.3 Melt mass-flow rate .5
7 Changes to 6.2.1 Outside diameter .5
8 Changes to 6.2.3 wall thickness .5
9 Changes to 6.4.1.1 Diameters and length .7
10 Change to 6.4.1.2 Wall thicknesses of sockets .7
11 Changes to 6.4.3 Electrofusion sockets .8
12 Changes to 7.1 Mechanical characteristics of pipes .8
13 Changes to 8.2 Physical characteristics of fittings .9
14 Changes to Clause 9 Performance requirements .9
15 Changes to Clause 10 Sealing rings .9
16 Changes to Clause 11 Marking .9
17 Changes to 11.2 Minimum required marking of pipes .9
18 Changes to 11.3 Minimum required marking of fittings .9
19 Add a new Annex B .9
20 Change to Bibliography . 11

EN 12666-1:2005/prA1:2010 (E)
Foreword
This document (EN 12666-1:2005/prA1:2010) has been prepared by Technical Committee CEN/TC 155
“Plastics piping systems and ducting systems”, the secretariat of which is held by NEN.
This document is currently submitted to the CEN Enquiry.
The draft Amendment contains changes that have been agreed by CEN/TC 155 to harmonize the
requirements in the drainage and sewerage standards.
The main changes in the revised document are:
 two new dimensions, 560 mm and 710 mm are introduced;
 a new ring stiffness class SN 16 is introduced;
 updating of the references in Clause 2;
 introduction of S-series in 3.3;
 introduction of S-series, a new footnote a) and a new NOTE in Table 3;
 introduction of a new watertightness test for fabricated fittings;
 deletion of Long Term Performance of TPE seals – Table 12 and 10.3;
 corrections of misprints in Tables 13 and 14 Marking of pipes and fittings;
 introduction of a new informative Annex B Product standards of components that can be connected
to components conforming to this standard;
 updating and modification of the Bibliography.
EN 12666-1:2005/prA1:2010 (E)
Amendments to EN 12666-1:2005
1 Changes to foreword
In paragraph 7 delete list item 3 and replace list item 2 with the following:
"Part 2: Guidance for the assessment of conformity (CEN Technical Report)"
2 Change to Clause 1 Scope
Change the reference in the text below Note 1 to the following:
"CEN/TR 12666-2"
3 Changes to Clause 2 Normative references
Add the following references:
"CEN/TS 14541:2007, Plastics pipes and fittings for non-pressure applications — Utilisation of non-virgin
PVC-U, PP and PE materials"
"EN ISO 1167-1, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids —
Determination of the resistance to internal pressure — Part 1: General method (ISO 1167-1:2006)"
Delete the following references:
"EN 921, EN 921:1994, Plastics piping systems — Thermoplastics pipes — Determination of resistance
to internal pressure at constant temperature"
"EN 1989, Thermoplastics piping systems — Joints for buried non-pressure sewerage applications —
Test method for long-term sealing performance of joints with thermoplastic elastomer (TPE) seals by
estimating the sealing pressure"
4 Change to 3.3 Abbreviations
Add the following abbreviation:
"S :pipe series"
5 Change to 4.2 Reprocessable and recyclable material
Add the following text between the words permitted and provided in paragraph two:

"according to the rules in CEN/TS 14541"
EN 12666-1:2005/prA1:2010 (E)
6 Changes to 4.3 Melt mass-flow rate
Replace the following text:
"when tested in accordance with EN ISO 1133:2005, condition T (temperature: 190 °C; loading mass: 5
kg)."
by the following:
"The MFR of the base material shall be tested in accordance with EN ISO 1133, using the test
parameters: temperature 190 ºC and loading mass 5 kg."
7 Changes to 6.2.1 Outside diameter
Add dimensions 560 and 710 to Table 2 as follows:
Table 2 — Mean outside diameters
Dimensions in millimetres
Nominal size Nominal outside Mean outside diameter
DN/OD diameter
d d d
n em,min em,max
110 110 110,0 111,0
125 125 125,0 126,2
160 160 160,0 161,5
200 200 200,0 201,8
250 250 250,0 252,3
315 315 315,0 317,9
355 355 355,0 358,2
400 400 400,0 403,6
450 450 450,0 454,1
500 500 500,0 504,5
560 560 560,0 565,0
630 630 630,0 635,7
710 710 710,0 716,4
800 800 800,0 807,2
1 000 1 000 1 000,0 1 009,0
1 200 1 200 1 200,0 1 210,0
1 400 1 400 1 400,0 1 410,0
1 600 1 600 1 600,0 1 610,0
8 Changes to 6.2.3 wall thickness
Delete note below Table 3.
Add dimensions 560 and 710, S-series and SN 16 to Table 3 as follows:
EN 12666-1:2005/prA1:2010 (E)
Table 3 — Wall thi
...