oSIST prEN 12201-1:2021

Plastics piping systems for water supply, and for drainage and sewerage under pressure - Polyethylene (PE) - Part 1: General

This document specifies 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, drainage and sewerage under pressure, vacuum sewer systems, and water for other purposes.
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, drainage and sewerage are possibly not suitable for water supply for human consumption.
It also specifies the test parameters for the test methods referred to in this document.
In conjunction with Parts 2 to 5 of EN 12201, it is applicable to PE pipes, fittings, valves, their joints and to joints with components of 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;
c)   buried in the ground;
d)   sea outfalls;
e)   laid in water;
f)   above ground, including pipes suspended below bridges.
NOTE 2   For applications operating at constant temperatures greater than 20 °C and up to 40 °C, see Annex A.
EN 12201 series covers a range of allowable operating pressures and gives requirements concerning colours.
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.

Kunststoff-Rohrleitungssysteme für die Wasserversorgung und für Entwässerungs- und Abwasserdruckleitungen - Polyethylen (PE) - Teil 1: Allgemeines

Dieses Dokument legt die allgemeinen Anforderungen an erdverlegte oder oberirdisch verlegte Druckrohrleitungssysteme (Haupt- und Anschlussleitungen) aus Polyethylen (PE) fest, die für den Transport von Trinkwasser, des zur Aufbereitung vorgesehenen Rohwassers, für Entwässerungs- und Abwasserdruckleitungen, Unterdruckentwässerungssysteme sowie für den Transport von Brauchwasser vorgesehen sind.
ANMERKUNG 1   In Zusammenhang mit Rohrleitungsteilen aus PE für den Transport von Trinkwasser einschließlich des aufzubereitenden Rohwassers wird auf Abschnitt 6 dieses Dokuments verwiesen. Rohrleitungsteile, die für den Transport von Brauchwasser sowie für Entwässerungs- und Abwasserleitungen gefertigt wurden, sind möglicherweise nicht für die Versorgung mit Trinkwasser geeignet.
Es legt auch die Prüfparameter für die Prüfverfahren fest, auf die in diesem Dokument verwiesen wird.
Zusammen mit EN 12201, Teil 2 bis Teil 5 gilt es für Rohre, Formstücke und Armaturen aus PE, deren Verbindungen untereinander sowie mit Rohrleitungsteilen aus anderen Werkstoffen, die zur Verwendung unter den folgenden Bedingungen vorgesehen sind:
a)   maximal zulässiger Bauteilbetriebsdruck PFA bis 25 bar ;
b)   eine Betriebstemperatur von 20 °C als Bezugstemperatur;
c)   erdverlegt;
d)   Entwässerung ins Meer (Siele);
e)   in Gewässern verlegt;
f)   oberirdisch verlegt, einschließlich Düker und Brückenleitungen.
ANMERKUNG 2   Für Anwendungsgebiete, in denen konstante Betriebstemperaturen von über 20 °C bis höchstens 40 °C auftreten, siehe Anhang A.
Die Normenreihe EN 12201 deckt einen Bereich von zulässigen Bauteilbetriebsdrücken ab und enthält Anforderungen bezüglich Farben.
ANMERKUNG 3   Es liegt in der Verantwortung des Auftraggebers oder Planers, aus diesen Gesichtspunkten die geeignete Auswahl zu treffen, unter Berücksichtigung ihrer speziellen Anforderungen und jeglicher maßgebenden nationalen Empfehlungen oder Festlegungen und Verfahrensweisen oder Vorschriften für die Verlegung.

Systèmes de canalisations en plastique pour l'alimentation en eau et pour les branchements et les collecteurs d'assainissement avec pression - Polyéthylène (PE) - Partie 1: Généralités

Le présent document spécifie les aspects généraux des systèmes de canalisations en polyéthylène (PE) avec pression (canalisations de distribution et de branchement) pour des applications enterrées ou non enterrées, prévus pour le transport d’eau destinée à la consommation humaine, y compris l’eau brute avant traitement, les branchements et les collecteurs d’assainissement avec pression, les réseaux d’évacuation des eaux usées sous vide et l’eau destinée à d’autres usages.
NOTE 1   Pour les composants en PE prévus pour le transport d’eau destinée à la consommation humaine et d’eau brute avant traitement, l’attention est attirée sur l’Article 6 du présent document. Les composants fabriqués pour l’eau destinée à d’autres usages et pour les branchements et les collecteurs d’assainissement peuvent s’avérer inaptes pour l’alimentation en eau destinée à la consommation humaine.
Il spécifie également les paramètres d’essai pour les méthodes d’essai référencées dans le présent document.
Conjointement avec les Parties 2 à 5 de l’EN 12201, il s’applique aux tubes, raccords et robinets en PE et à leurs assemblages, ainsi qu’aux assemblages avec des composants en d’autres matières destinés à être utilisés dans les conditions suivantes :
a)   une pression de service admissible, PFA, jusqu’à 25 bar  ) ;
b)   une température de service de 20 °C comme température de référence ;
c)   enterrés dans le sol ;
d)   comme émissaires de rejet en mer ;
e)   posés dans l’eau ;
f)   non enterrés, y compris canalisations suspendues sous des ponts.
NOTE 2   Pour les applications à température de service constante supérieure à 20 °C et jusqu’à 40 °C, voir Annexe A.
La série EN 12201 couvre une gamme de pressions de service admissibles et donne les exigences concernant les couleurs.
NOTE 3   Il est de la responsabilité de l’acheteur ou du concepteur du réseau d’effectuer les choix appropriés à partir de ces données, en tenant compte des exigences particulières et de toute ligne directrice ou toute réglementation nationale applicable, ainsi que des pratiques ou codes de pose.

Cevni sistemi iz polimernih materialov za oskrbo z vodo in za odvodnjavanje in kanalizacijo pod tlakom - Polietilen (PE) - 1. del: Splošno

General Information

• Status: Not Published
• Public Enquiry End Date: 04-Jul-2021
• ICS: 23.040.05 - Pipeline and its parts for external sewage systems
• ICS: 23.040.20 - Plastics pipes
• ICS: 91.140.60 - Water supply systems
• ICS: 93.030 - External sewage systems
• Technical Committee: PCV - Plastic pipes, fittings and valves
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 17-May-2021
• Due Date: 04-Oct-2021
• Completion Date: 04-Jun-2021
• Ref Project: prEN 12201-1 - Plastics piping systems for water supply - Polyethylene (PE) - Part 1: General

Relations

• Revised: SIST EN 12201-1:2011 - Plastics piping systems for water supply, and for drainage and sewerage under pressure - Polyethylene (PE) - Part 1: General
• Effective Date: 01-Jul-2021
• Revised: SIST EN 12201-1:2011 - Plastics piping systems for water supply, and for drainage and sewerage under pressure - Polyethylene (PE) - Part 1: General
• Effective Date: 18-Jan-2023
• Revised: SIST EN 12201-1:2011 - Plastics piping systems for water supply, and for drainage and sewerage under pressure - Polyethylene (PE) - Part 1: General
• Effective Date: 19-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN 12201-1:2021
01-julij-2021
Cevni sistemi iz polimernih materialov za oskrbo z vodo in za odvodnjavanje in
kanalizacijo pod tlakom - Polietilen (PE) - 1. del: Splošno
Plastics piping systems for water supply, and for drainage and sewerage under pressure
- Polyethylene (PE) - Part 1: General
Kunststoff-Rohrleitungssysteme für die Wasserversorgung und für Entwässerungs- und
Abwasserdruckleitungen - Polyethylen (PE) - Teil 1: Allgemeines
Systèmes de canalisations en plastique pour l'alimentation en eau et pour les
branchements et les collecteurs d'assainissement avec pression - Polyéthylène (PE) -
Partie 1: Généralités
Ta slovenski standard je istoveten z: prEN 12201-1
ICS:
23.040.05 Cevovodi za zunanje Pipeline and its parts for
sisteme za odpadno vodo in external sewage systems
njihovi deli
91.140.60 Sistemi za oskrbo z vodo Water supply systems
93.030 Zunanji sistemi za odpadno External sewage systems
vodo
oSIST prEN 12201-1:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 12201-1:2021

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oSIST prEN 12201-1:2021


DRAFT
EUROPEAN STANDARD
prEN 12201-1
NORME EUROPÉENNE

EUROPÄISCHE NORM

April 2021
ICS 23.040.20 Will supersede EN 12201-1:2011
English Version

Plastics piping systems for water supply, and for drainage
and sewerage under pressure - Polyethylene (PE) - Part 1:
General
Systèmes de canalisations en plastique pour Kunststoff-Rohrleitungssysteme für die
l'alimentation en eau et pour les branchements et les Wasserversorgung und für Entwässerungs- und
collecteurs d'assainissement avec pression - Abwasserdruckleitungen - Polyethylen (PE) - Teil 1:
Polyéthylène (PE) - Partie 1: Généralités Allgemeines
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 155.

If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard 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-CENELEC
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, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey 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

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 12201-1:2021 E
worldwide for CEN national Members.

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oSIST prEN 12201-1:2021
prEN 12201-1:2021 (E)
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 7
3.1 Terms and definitions . 7
3.1.1 Geometrical characteristics . 7
3.2 Material definitions . 9
3.3 Definitions related to material characteristics . 10
3.4 Definitions related to service conditions . 11
3.5 Definitions related to joints . 11
4 Symbols and abbreviated terms . 12
4.1 Symbols. 12
4.2 Abbreviations . 13
5 Compound . 13
5.1 Material of the components . 13
5.2 Compound . 13
5.2.1 Additives and pigments . 13
5.2.2 Colour . 14
5.2.3 Characteristics . 14
5.2.4 Fusion compatibility for PE 80 and PE 100 materials . 18
5.3 Classification and designation . 18
6 Effect on water quality . 19
Annex A (normative) Pressure reduction coefficients . 20
Annex B (informative) Resistance to rapid crack propagation . 21
Annex C (informative) Additional information related to the installation of PE100-RC
systems for non-conventional installations . 23
Bibliography. 26

2

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oSIST prEN 12201-1:2021
prEN12201-1:2021 (E)
European foreword
This document (prEN 12201-1:2021) 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 will supersede EN 12201-1:2011.
In comparison with the previous edition, the following technical modifications have been made:
— The revision of this System Standard has been carried out to add the PE 100-RC type materials with
enhanced resistance to slow crack growth. Annex A discusses the performance of this type of
material and gives additional information for non-conventional installation techniques. The size
range has been increased to 3000 mm diameter, test methods have been updated, and new test
methods have been added for PE 100-RC materials.
System Standards are based on the results of the work being undertaken in ISO/TC 138 “Plastics pipes,
fittings and valves for the transport of fluids”, which is a Technical Committee of the International
Organization for Standardization (ISO).
They are supported by separate standards on test methods to which references are made throughout the
system Standard.
The System Standards are consistent with general standards on functional requirements and on
recommended practice for installation.
EN 12201 consists of the following Parts:
— EN 12201-1, Plastics piping systems for water supply, and for drainage and sewerage under pressure
— Polyethylene (PE) — Part 1: General (this document);
— EN 12201-2, Plastics piping systems for water supply, and for drainage and sewerage under pressure
— Polyethylene (PE) — Part 2: Pipes;
— EN 12201-3, Plastics piping systems for water supply, and for drainage and sewerage under pressure
— Polyethylene (PE) — Part 3: Fittings;
— EN 12201-4, Plastics piping systems for water supply, and for drainage and sewerage under pressure
— Polyethylene (PE) — Part 4: Valves for water supply systems;
— EN 12201-5, Plastics piping systems for water supply, and for drainage and sewerage under pressure
— Polyethylene (PE) — Part 5: Fitness for purpose of the system.
In addition the following document provides guidance on the assessment of conformity:
— CEN/TS 12201-7, Plastics piping systems for water supply — Polyethylene (PE) — Part 7: Assessment
of conformity.
3

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oSIST prEN 12201-1:2021
prEN12201-1:2020 (E)
Introduction
The System Standard, of which this is Part 1, specifies the requirements for a piping system and its
components when made from polyethylene (PE). The piping system is intended to be used for water
supply intended for human consumption, including the conveyance of raw water prior to treatment,
drainage and sewerage under pressure, vacuum sewer systems, and water for other purposes.
In respect of potential adverse effects on the quality of water intended for human consumption, caused
by the products covered by the EN 12201 series:
a) this document provides no information as to whether the products may be used without restriction
in any of the Member States of the EU or EFTA;
b) products intended for use in water supply systems should comply, when existing, with national
regulations and testing arrangements that ensure fitness for contact with drinking water.
Requirements and test methods for components of the piping system are specified in
prEN 12201-2:2021, prEN 12201-3:2021 and prEN 12201-4:2021.
Characteristics for fitness for purpose are covered in prEN 12201-5:2021 [1]. CEN/TS 12201-7 [2] gives
guidance on the assessment of conformity.
This Part of EN 12201 covers the general aspects of the plastics piping system.
4

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oSIST prEN 12201-1:2021
prEN12201-1:2021 (E)
1 Scope
This document specifies 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, drainage and sewerage under pressure, vacuum sewer
systems, and water for other purposes.
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, drainage and sewerage are possibly not suitable for water supply for human consumption.
It also specifies the test parameters for the test methods referred to in this document.
In conjunction with Parts 2 to 5 of EN 12201, it is applicable to PE pipes, fittings, valves, their joints and
to joints with components of other materials intended to be used under the following conditions:
1)
a) allowable operating pressure, PFA, up to 25 bar ;
b) an operating temperature of 20 °C as a reference temperature;
c) buried in the ground;
d) sea outfalls;
e) laid in water;
f) above ground, including pipes suspended below bridges.
NOTE 2 For applications operating at constant temperatures greater than 20 °C and up to 40 °C, see Annex A.
EN 12201 series covers a range of allowable operating pressures and gives requirements concerning
colours.
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.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
prEN 12201-2:2021, Plastics piping systems for water supply, and for drainage and sewerage under
pressure — Polyethylene (PE) — Part 2: Pipes
prEN 12201-3, Plastics piping systems for water supply, and for drainage and sewerage under pressure —
Polyethylene (PE) — Part 3: Fittings
prEN 12201-4:2021, Plastics piping systems for water supply, and for drainage and sewerage under
pressure — Polyethylene (PE) — Part 4: Valves for water supply systems
EN 12099, Plastics piping systems - Polyethylene piping materials and components - Determination of
volatile content

1) 5 2
1 bar = 0,1 MPa = 10 Pa; 1 MPa = 1 N/mm .
5

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oSIST prEN 12201-1:2021
prEN12201-1:2020 (E)
EN ISO 472:2013, Plastics —Vocabulary (ISO 472:2013)
EN ISO 1043-1:2011, Plastics – Symbols and abbreviated terms — Part 1: Basic polymers and their special
characteristics (ISO 1043-1:2011)
EN ISO 1133-1, Plastics - Determination of the melt mass-flow rate (MFR) and melt volume-flow rate (MVR)
of thermoplastics - Part 1: Standard method (ISO 1133-1)
EN ISO 1167-1:2006, 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)
EN ISO 1167-2, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids - Determination
of the resistance to internal pressure - Part 2: Preparation of pipe test pieces (ISO 1167-2)
EN ISO 1183-1, Plastics - Methods for determining the density of non-cellular plastics - Part 1: Immersion
method, liquid pycnometer method and titration method (ISO 1183-1)
EN ISO 1183-2, Plastics - Methods for determining the density of non-cellular plastics - Part 2: Density
gradient column method (ISO 1183-2)
EN ISO 6259-1, Thermoplastics pipes - Determination of tensile properties - Part 1: General test method (ISO
6259-1)
EN ISO 6259-3, Thermoplastics pipes - Determination of tensile properties - Part 3: Polyolefin pipes (ISO
6259-3)
EN ISO 9080, Plastics piping and ducting systems - Determination of the long-term hydrostatic strength of
thermoplastics materials in pipe form by extrapolation (ISO 9080)
EN ISO 11357-6, Plastics - Differential scanning calorimetry (DSC) - Part 6: Determination of oxidation
induction time (isothermal OIT) and oxidation induction temperature (dynamic OIT) (ISO 11357-6)
EN ISO 12162, Thermoplastics materials for pipes and fittings for pressure applications - Classification,
designation and design coefficient (ISO 12162)
EN ISO 13477, Thermoplastics pipes for the conveyance of fluids - Determination of resistance to rapid crack
propagation (RCP) - Small-scale steady-state test (S4 test) (ISO 13477)
EN ISO 13478, Thermoplastics pipes for the conveyance of fluids - Determination of resistance to rapid crack
propagation (RCP) - Full-scale test (FST) (ISO 13478)
EN ISO 15512, Plastics - Determination of water content (ISO 15512)
EN ISO 16871, Plastics piping and ducting systems - Plastics pipes and fittings - Method for exposure to
direct (natural) weathering (ISO 16871)
ISO 3, Preferred numbers — Series of preferred numbers
ISO 6964, Polyolefin pipes and fittings — Determination of carbon black content by calcination and
pyrolysis — Test method
ISO 11413:2019, Plastics pipes and fittings — Preparation of test piece assemblies between a polyethylene
(PE) pipe and an electrofusion fitting
6

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oSIST prEN 12201-1:2021
prEN12201-1:2021 (E)
ISO 11414:2009, Plastics pipes and fittings — Preparation of polyethylene (PE) pipe/pipe or pipe/fitting
test piece assemblies by butt fusion
2)
ISO/DIS 13479:— , Polyolefin pipes for the conveyance of fluids — Determination of resistance to crack
propagation — Test method for slow crack growth on notched pipes
ISO 13953, Polyethylene (PE) pipes and fittings — Determination of the tensile strength and failure mode
of test pieces from a butt-fused joint
ISO 13954, Plastics pipes and fittings — Peel decohesion test for polyethylene (PE) electrofusion assemblies
of nominal outside diameter greater than or equal to 90 mm
ISO 16770, Plastics — Determination of environmental stress cracking (ESC) of polyethylene — Full-notch
creep test (FNCT)
ISO 18488, Polyethylene (PE) materials for piping systems — Determination of Strain Hardening Modulus
in relation to slow crack growth — Test method
ISO 18489, Polyethylene (PE) materials for piping systems — Determination of resistance to slow crack
growth under cyclic loading — Cracked Round Bar test method
ISO 18553, Method for the assessment of the degree of pigment or carbon black dispersion in polyolefin
pipes, fittings and compounds
3 Terms and definitions
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in EN ISO 472:2013 and
EN ISO 1043-1:2011 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
3.1.1 Geometrical characteristics
3.1.1.1
nominal size
DN/OD
numerical designation of the size of a component related to the outside diameter
Note 1 to entry: It is a convenient round number approximately equal to the manufacturing dimension in
millimetres (mm). It is not applicable to components designated by thread size.
3.1.1.2
nominal outside diameter
d
n
specified outside diameter assigned to a nominal size DN/OD
Note 1 to entry: Nominal outside diameter is expressed in millimetres
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3.1.1.3
outside diameter at any point
d
e
value of the measurement of the outside diameter through its cross-section at any point of the pipe or
spigot end, rounded to the next greater 0,1 mm
3.1.1.4
mean outside diameter
d
em
value of the measurement of the outer circumference of the pipe or spigot end of a fitting in any cross
section divided by π (= 3,142), rounded to the next greater 0,1 mm
3.1.1.5
minimum mean outside diameter
d
em,min
minimum value of the outside diameter as specified for a given nominal size
3.1.1.6
maximum mean outside diameter

dem,max
maximum value of the outside diameter as specified for a given nominal size
3.1.1.7
out-of-roundness
ovality
difference between the maximum outside diameter and the minimum outside diameter in the same cross-
section of the pipe or spigot
3.1.1.8
nominal wall thickness
e
n
numerical designation of the wall thickness of a component, which is a convenient round number,
approximately equal to the manufacturing dimension in millimetres
Note 1 to entry: For thermoplastics components conforming to the different parts of EN 12201, the value of the
nominal wall thickness, e , is identical to the specified minimum wall thickness at any point, e .
n min
3.1.1.9
wall thickness at any point
e
wall thickness at any point around the circumference of a component rounded to the next greater 0,1 mm
Note 1 to entry: The symbol for the wall thickness of the fittings and valves body at any point is E.
3.1.1.10
minimum wall thickness at any point
e
min
minimum value of the wall thickness at any point around the circumference of a component as specified
3.1.1.11
maximum wall thickness at any point
e
max
maximum value of the wall thickness at any point around the circumference of a component as specified
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prEN12201-1:2021 (E)
3.1.1.12
mean wall thickness
e
m
arithmetic mean of a number of measurements of the wall thickness, regularly spaced around the
circumference and in the same cross-section of a component, including the measured minimum and the
measured maximum values of the wall thickness in that cross-section
3.1.1.13
tolerance
permitted variation of the specified value of a quantity expressed as the difference between the
permissible maximum and permitted minimum values
3.1.1.14
wall thickness tolerance
t
y
permitted difference between the wall thickness at any point, e, and the nominal wall thickness, e
n
Note 1 to entry: en ≤ e ≤ en + ty
3.1.1.15
pipe series
S
dimensionless number for pipe designation·
Note 1 to entry: The relationship between the pipe series S and the standard dimension ratio SDR is given by the
following equation as specified in ISO 4065:2018 [7].
SDR− 1
S=
2
3.1.1.16
standard dimension ratio
SDR
numerical designation of a pipe series, which is a convenient round number, approximately equal to the
dimension ratio of the nominal outside diameter, d , and the nominal wall thickness, e
n n
3.2 Material definitions
3.2.1
compound
homogenous extruded mixture of base polymer (PE) and additives, i.e. anti-oxidants, pigments, carbon
black, UV-stabilisers and others, at a dosage level necessary for the processing and use of components
conforming to the requirements of this document
3.2.2
virgin material
compound in a form such as granules that has not been subjected to use or processing other than that
required for its manufacture, and to which no reworked or recyclable materials have been added
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3.2.3
reworked material
plastics materials from rejected unused products or trimmings that have been manufactured and
retained within plants owned and operated by the same legal entity
Note 1 to entry: Restrictions for use of reworked material for pipes are defined in prEN 12201-2, fittings in
prEN 12201-3 and for valves in prEN 12201-4.
3.2.4
base polymer
polymer produced by the material supplier for the manufacture of the compound according to this
document
3.3 Definitions related to material characteristics
3.3.1
lower confidence limit of the predicted hydrostatic strength
σ
LPL
quantity, with the dimensions of stress, which represents the 97,5 % lower confidence limit of the
predicted hydrostatic strength at a temperature θ and time t
Note 1 to entry: It is expressed in megapascals (MPa).
3.3.2
minimum required strength
MRS
value of σ at 20 °C and 50 years, rounded down to the next lower value of the R10 series as defined in
LPL
ISO 3 when σ is less than 20 MPa, or down to the next lower value of the R20 series as defined in ISO 3
LPL
when σ is greater than or equal to 20 MPa
LPL
Note 1 to entry: Only compounds with a MRS of 4, 8 or 10 are specified in this document.
Note 2 to entry: The R10 series conforms to ISO 3 and the R20 series conforms to ISO 497 [4].
Note 3 to entry: The minimum required strength is expressed in megapascals.
3.3.3
design coefficient
C
coefficient with a value greater than 1, which takes into consideration service conditions as well as
properties of the components of a piping system other than those represented in the lower confidence
limit
3.3.4
design stress
σ
s
allowable stress for a given application at 20 °C, that is derived by dividing the MRS by the coefficient C,
i.e.:
MRS
σ =
S
C
Note 1 to entry It is expressed in megapascals.
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3.3.5
melt mass-flow rate
MFR
value relating to the viscosity of the molten material at a specified temperature and load
Note 1 to entry: It is expressed in grams per 10 min (g/10 min).
3.4 Definitions related to service conditions
3.4.1
nominal pressure
PN
numerical designation used for reference purposes related to the mechanical characteristics of the
component of a piping system
Note 1 to entry: For plastic piping systems conveying water, it corresponds to the allowable operating pressure
(PFA) in bar, which can be sustained with water at 20 °C with a design basis of 50 years, and based on the minimum
design coefficient:
20× MRS
PN=
C×−()SDR 1
Note 2 to entry: Research on long term performance prediction of PE water distribution systems shows a possible
service life of at least 100 years, see Bibliography [9], and [10].
3.4.2
allowable operating pressure
PFA
maximum hydrostatic pressure that a component is capable of withstanding continuously in service
Note 1 to entry: See Annex A.
3.4.3
reference temperature
temperature for which the piping system is designed
Note 1 to entry: It is used as the base for further calculation when designing a piping system or parts of a piping
system for operating temperatures different from the reference temperature.
3.5 Definitions related to joints
3.5.1
butt fusion joint using heated tool
joint made by heating the planed ends of pipes or spigot end fittings, the surfaces of which match by
holding them against a flat heating plate until the PE material reaches fusion temperature, removing the
heating plate quickly and pushing the two softened ends against one another
3.5.2
electrofusion joint
joint between a PE socket or saddle electrofusion fitting and pipe or fitting with spigot ends, made by
heating the electrofusion fittings by the Joule effect of the heating element incorporated at their jointing
surfaces, causing the material adjacent to them to melt and the pipe and fitting surfaces to fuse
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3.1.5.3
mechanical joint
joint made by assembling a PE pipe to an other PE pipe or any other element of the piping system that
generally includes a compression part to provide for pressure integrity, leaktightness and resistance to
end loads
Note 1 to entry: A support sleeve inserted into the pipe bore should be used to provide a permanent support for
the PE pipe to prevent creep in the pipe wall under radial compressive forces. The metallic parts of these fittings or
valves can be assembled to metallic pipes by screw threads, compression joints, welded or brazed flanges or by
other means. The fitting or valve can allow either a dismountable or a permanently assembled joint.
3.1.5.4
fusion compatibility
ability of two similar or dissimilar polyethylene materials to be fused together to form a joint which
conforms to the performance requirements of this document
4 Symbols and abbreviated terms
4.1 Symbols
For the purposes of this document, the following symbols apply.
C design coefficient
d outside diameter (at any point)
e
d mean outside diameter
em
d maximum mean outside diameter
em,max
d minimum mean outside diameter
em,min
d nominal outside diameter
n
E wall thickness (at any point) of a fitting or valve body
e wall thickness (at any point) of a pipe
e mean wall thickness
m
e maximum wall thickness (at any point)
max
e minimum wall thickness (at any point)
min
e nominal wall thickness
n
σ lower confidence limit of the predicted hydrostatic strength
LPL
σ design stress
s
t wall thickness tolerance
y
NOTE Symbols de, e, emin and emax in this document are equivalent to dey, ey, ey,min and ey,max, respectively,
used in ISO 11922-1 [4].
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4.2 Abbreviations
For the purposes of this document, the following abbreviations apply.
AFNCT accelerated full notched creep test
ANPT accelerated notched pipe test
CRB cracked round bar
DN/OD nominal size, outside diameter related
FNCT full notch creep test
LPL lower predicted limit
MFR melt mass-flow rate
MRS minimum required strength
NPT notched pipe test
OIT oxidation induction time
PE Polyethylene
PFA allowable operating pressure
PN nominal pressure
R seri
...