EN 12106:2025
(Main)Plastics piping systems - Polyethylene (PE), crosslinked polyethylene (PE-X) and unplasticized polyamide (PA-U) pipes - Test method for the resistance to internal pressure after application of squeeze-off
Plastics piping systems - Polyethylene (PE), crosslinked polyethylene (PE-X) and unplasticized polyamide (PA-U) pipes - Test method for the resistance to internal pressure after application of squeeze-off
This document specifies a method to determine the resistance to internal pressure of polyethylene (PE), crosslinked polyethylene (PE-X) and unplasticized (PA-U) pipes to verify the condition of the pipe after being subjected to a squeeze-off procedure.
The equipment and procedure used to prepare the test samples and test parameters are given in this document, i.e.:
a) the diameter and series of the pipe to be tested (see 6.1);
b) the number of test pieces (see 6.2);
c) the parameters for the hydrostatic strength tests (see 7.6).
NOTE 1 Further information on the squeeze-off procedure is given in EN 12007-2 and ISO/TS 10839 for polyethylene, and CEN/TS 12007-6 for unplasticized polyamide.
NOTE 2 The squeeze-off procedure is specified to limit gas flow to allow maintenance, repair or to make network connections. Squeeze-off is used in an emergency for pipes carrying other media.
Kunststoff-Rohrleitungssysteme - Rohre aus Polyethylen (PE), vernetztem Polyethylen (PE-X) und weichmacherfreiem Polyamid (PA-U) - Bestimmung der Widerstandsfähigkeit gegen Innendruck nach Abquetschen
Dieses Dokument legt ein Verfahren zur Bestimmung des Widerstands gegen Innendruck von Rohren aus Polyethylen (PE), vernetztem Polyethylen (PE-X) und weichmacherfreiem Polyamid (PA-U) fest, um den Zustand des Rohres zu überprüfen, nachdem es einem Abquetschverfahren unterzogen wurde.
Die Einrichtung und das Verfahren zur Vorbereitung der Probekörper und Prüfparameter sind in diesem Dokument beschrieben, d. h.:
a) der Durchmesser und die Rohrserie des zu prüfenden Rohres (siehe 6.1);
b) die Anzahl der Probekörper (siehe 6.2);
c) die Parameter für die Prüfungen der Zeitstand-Innendruckfestigkeit (siehe 7.6).
ANMERKUNG 1 Weitere Informationen zum Abquetschverfahren sind in EN 12007 2 und ISO/TS 10839 für Polyethylen und in CEN/TS 12007 6 für weichmacherfreies Polyamid angegeben.
ANMERKUNG 2 Das Abquetschverfahren ist festgelegt, um den Gasstrom zu begrenzen, um Wartungsarbeiten, Reparaturen oder Netzwerkverbindungen zu ermöglichen. Bei Rohren, die andere Medien befördern, wird eine Abquetschung im Notfall vorgenommen.
Systèmes de canalisations en plastique - Tubes en polyéthylène (PE), polyéthylène réticulé (PE-X) et polyamide non plastifié (PA-U) - Méthode d'essai de résistance à la pression interne après application de l'écrasement
Le présent document spécifie une méthode de détermination de la résistance à la pression interne des tubes en polyéthylène (PE), en polyéthylène réticulé (PE-X) et en (PA-U) non plastifié afin de vérifier l'état du tube après avoir été soumis à un écrasement.
Le dispositif et le mode opératoire utilisés pour préparer les échantillons d'essai et les paramètres d'essai sont indiqués dans le présent document, c'est-à-dire :
a) le diamètre et la série du tube à soumettre à essai (voir 6.1) ;
b) le nombre d'éprouvettes (voir 6.2) ;
c) les paramètres des essais de résistance hydrostatique (voir 7.6).
NOTE 1 Des informations complémentaires sur le mode opératoire d'écrasement sont données dans l'EN 12007‑2 et l'ISO/TS 10839 pour le polyéthylène, et dans le CEN/TS 12007‑6 pour le polyamide non plastifié.
NOTE 2 Le mode opératoire d'écrasement est spécifiée pour limiter le débit de gaz afin de permettre l'entretien, la réparation ou le raccordement au réseau. L'écrasement est utilisé en cas d'urgence pour les tubes transportant d'autres fluides.
Cevni sistemi iz polimernih materialov - Polietilen (PE), zamreženi polietilen (PE-X) in cevi iz nemehčanega poliamida (PA-U) - Metoda za preskus odpornosti proti notranjemu tlaku po izvedenem stiskanju cevi (squeeze-off)
Ta dokument določa metodo za ugotavljanje odpornosti cevi iz polietilena (PE), zamreženega polietilena (PE-X) in nemehčanega poliamida (PA-U) proti notranjemu tlaku za preverjanje stanja cevi po izvedenem postopku stiskanja. V tem dokumentu so navedeni oprema in postopek, ki se uporablja za pripravo preskusnih vzorcev, ter preskusni parametri, tj.: a) premer in sklop cevi, ki jo je treba preskusiti (glej točko 6.1); b) število preskušancev (glej točko 6.2); c) parametri za hidrostatične preskuse trdnosti (glej točko 7.6). OPOMBA 1: Več informacij o postopku stiskanja je navedenih v standardih EN 12007-2 in ISO/TS 10839 za polietilen ter standardu CEN/TS 12007-6 za nemehčani poliamid. OPOMBA 2: Postopek stiskanja je določen za omejevanje pretoka plina, da se omogoči vzdrževanje, popravilo ali vzpostavitev omrežnih povezav. Stiskanje se uporablja v nujnih primerih za cevi, ki prenašajo druge medije.
General Information
Relations
Overview
EN 12106:2025 is a comprehensive European standard that defines a precise test method to assess the resistance to internal pressure of polyethylene (PE), crosslinked polyethylene (PE-X), and unplasticized polyamide (PA-U) pipes after they undergo a squeeze-off procedure. This standard, published by CEN in May 2025, supersedes the previous EN 12106:1997, incorporating significant updates such as material-specific test parameters and updated testing references aligned with ISO standards. The primary aim is to verify the pipe integrity and performance post squeeze-off - a method used to temporarily restrict fluid or gas flow for maintenance or emergency interventions.
Key Topics
- Materials Covered: Polyethylene (PE), Crosslinked Polyethylene (PE-X), Unplasticized Polyamide (PA-U) pipes.
- Squeeze-Off Procedure: Describes how pipes are compressed at low temperature using circular-section bars to simulate real-world pipe clamping conditions during maintenance or repair work.
- Test Parameters: Specifies pipe diameters and series, number of test samples, squeeze-off levels, and hydrostatic pressure test conditions in accordance with EN ISO 1167-1 and EN ISO 1167-2.
- Equipment Requirements: Details necessary apparatus - squeeze-off rigs with rigid circular bars, temperature conditioning devices, and pressure test setups for accurate and repeatable testing outcomes.
- Test Procedure: Outlines step-by-step method including pipe conditioning at 0 °C, controlled squeeze-off closure rate, hold time, release, re-rounding of pipes, and hydrostatic strength evaluation.
- Failure Reporting: Emphasizes documentation of failure location and mode, plus detailed reporting requirements covering pipe specifications, test conditions, and observations to ensure traceability and quality control.
Applications
EN 12106:2025 is essential for manufacturers, installers, and regulators of plastic piping systems used in:
- Gas Distribution Networks: Ensures that PE and PA-U pipes subjected to squeeze-off maintain sufficient pressure resistance for safe gas conveyance.
- Water Supply Systems: Validates pipe durability after temporary flow restrictions or emergency closures, guaranteeing system reliability.
- Industrial Fluid Transport: Facilitates testing for pipes in process plants where maintenance or emergency isolation via squeeze-off is necessary.
- Infrastructure Maintenance: Provides a standard method to assess the impact of operational squeeze-offs, critical for planning pipe repairs, replacements, and network expansions without compromising integrity.
Related Standards
- EN ISO 1167-1 and EN ISO 1167-2: Specify general methods and preparation for internal pressure resistance testing of thermoplastic pipes, constituting the hydrostatic testing framework used in EN 12106:2025.
- EN 12007-2 and ISO/TS 10839: Provide additional details on the squeeze-off procedures specifically for polyethylene pipes.
- CEN/TS 12007-6: Focuses on squeeze-off methods for unplasticized polyamide pipes.
- EN 1555-2: Covers specifications and performance requirements for polyethylene pipes used in gaseous fuel supply systems, referenced for test parameter derivation.
- ISO 14531-1 and EN ISO 16486-2: Offer additional guidance on PE-X and PA-U pipe testing conditions.
Keywords: EN 12106:2025, plastics piping systems, polyethylene pipes, crosslinked polyethylene, unplasticized polyamide pipes, squeeze-off test method, internal pressure resistance, hydrostatic strength test, pipe maintenance, gas distribution safety, plastic pipe standards, CEN piping standards.
Frequently Asked Questions
EN 12106:2025 is a standard published by the European Committee for Standardization (CEN). Its full title is "Plastics piping systems - Polyethylene (PE), crosslinked polyethylene (PE-X) and unplasticized polyamide (PA-U) pipes - Test method for the resistance to internal pressure after application of squeeze-off". This standard covers: This document specifies a method to determine the resistance to internal pressure of polyethylene (PE), crosslinked polyethylene (PE-X) and unplasticized (PA-U) pipes to verify the condition of the pipe after being subjected to a squeeze-off procedure. The equipment and procedure used to prepare the test samples and test parameters are given in this document, i.e.: a) the diameter and series of the pipe to be tested (see 6.1); b) the number of test pieces (see 6.2); c) the parameters for the hydrostatic strength tests (see 7.6). NOTE 1 Further information on the squeeze-off procedure is given in EN 12007-2 and ISO/TS 10839 for polyethylene, and CEN/TS 12007-6 for unplasticized polyamide. NOTE 2 The squeeze-off procedure is specified to limit gas flow to allow maintenance, repair or to make network connections. Squeeze-off is used in an emergency for pipes carrying other media.
This document specifies a method to determine the resistance to internal pressure of polyethylene (PE), crosslinked polyethylene (PE-X) and unplasticized (PA-U) pipes to verify the condition of the pipe after being subjected to a squeeze-off procedure. The equipment and procedure used to prepare the test samples and test parameters are given in this document, i.e.: a) the diameter and series of the pipe to be tested (see 6.1); b) the number of test pieces (see 6.2); c) the parameters for the hydrostatic strength tests (see 7.6). NOTE 1 Further information on the squeeze-off procedure is given in EN 12007-2 and ISO/TS 10839 for polyethylene, and CEN/TS 12007-6 for unplasticized polyamide. NOTE 2 The squeeze-off procedure is specified to limit gas flow to allow maintenance, repair or to make network connections. Squeeze-off is used in an emergency for pipes carrying other media.
EN 12106:2025 is classified under the following ICS (International Classification for Standards) categories: 23.040.20 - Plastics pipes. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 12106:2025 has the following relationships with other standards: It is inter standard links to EN 12106:1997. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 12106:2025 is associated with the following European legislation: EU Directives/Regulations: 305/2011. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
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Standards Content (Sample)
SLOVENSKI STANDARD
01-julij-2025
Cevni sistemi iz polimernih materialov - Polietilen (PE), zamreženi polietilen (PE-X)
in cevi iz nemehčanega poliamida (PA-U) - Metoda za preskus odpornosti proti
notranjemu tlaku po izvedenem stiskanju cevi (squeeze-off)
Plastics piping systems - Polyethylene (PE), crosslinked polyethylene (PE-X) and
unplasticized polyamide (PA-U) pipes - Test method for the resistance to internal
pressure after application of squeeze-off
Kunststoff-Rohrleitungssysteme - Rohre aus Polyethylen (PE) - Bestimmung der
Widerstandsfähigkeit gegen Innendruck nach Abquetschen
Systèmes de canalisations en plastique - Tubes en polyéthylène (PE) - Méthode d'essai
de résistance à la pression interne après application de l'écrasement
Ta slovenski standard je istoveten z: EN 12106:2025
ICS:
23.040.20 Cevi iz polimernih materialov Plastics pipes
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 12106
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2025
EUROPÄISCHE NORM
ICS 23.040.20 Supersedes EN 12106:1997
English Version
Plastics piping systems - Polyethylene (PE), crosslinked
polyethylene (PE-X) and unplasticized polyamide (PA-U)
pipes - Test method for the resistance to internal pressure
after application of squeeze-off
Systèmes de canalisations en plastique - Tubes en Kunststoff-Rohrleitungssysteme - Rohre aus
polyéthylène (PE), polyéthylène réticulé (PE-X) et Polyethylen (PE), vernetztem Polyethylen (PE-X) und
polyamide non plastifié (PA-U) - Méthode d'essai de weichmacherfreiem Polyamid (PA-U) - Bestimmung
résistance à la pression interne après application de der Widerstandsfähigkeit gegen Innendruck nach
l'écrasement Abquetschen
This European Standard was approved by CEN on 14 April 2025.
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. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists 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, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12106:2025 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
3.1 Terms related to geometry . 4
3.2 Terms related to squeeze-off procedure . 5
4 Principle . 6
5 Apparatus . 6
6 Test pieces . 7
6.1 General. 7
6.2 Preparation . 7
6.3 Number . 7
7 Procedure . 8
8 Test report . 10
Bibliography . 11
European foreword
This document (EN 12106:2025) has been prepared by Technical Committee CEN/TC 155 “Plastics
piping systems and ducting systems”, the secretariat of which is held by NEN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by November 2025, and conflicting national standards shall
be withdrawn at the latest by November 2025.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 12106:1997.
— PA-U, PE-X and PE 100-RC materials with test parameters have been added;
— ISO 1167-1 and ISO 1167-2 are referenced for the pipe hydrostatic pressure test in place of EN 921
which has been withdrawn.
This document is one of a series of standards on test methods which support System Standards for
plastics piping systems and ducting systems.
The material-dependent parameters and/or performance requirements are incorporated in the System
Standard(s) concerned.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: 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, Türkiye and the United
Kingdom.
1 Scope
This document specifies a method to determine the resistance to internal pressure of polyethylene (PE),
crosslinked polyethylene (PE-X) and unplasticized (PA-U) pipes to verify the condition of the pipe after
being subjected to a squeeze-off procedure.
The equipment and procedure used to prepare the test samples and test parameters are given in this
document, i.e.:
a) the diameter and series of the pipe to be tested (see 6.1);
b) the number of test pieces (see 6.2);
c) the parameters for the hydrostatic strength tests (see 7.6).
NOTE 1 Further information on the squeeze-off procedure is given in EN 12007-2 and ISO/TS 10839 for
polyethylene, and CEN/TS 12007-6 for unplasticized polyamide.
NOTE 2 The squeeze-off procedure is specified to limit gas flow to allow maintenance, repair or to make network
connections. Squeeze-off is used in an emergency for pipes carrying other media.
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.
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)
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)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
3.1 Terms related to geometry
3.1.1
nominal size
DN
numerical designation of the size of a component, which is a convenient round number approximately
equal to the manufacturing dimension
Note 1 to entry: It is expressed in millimetres (mm).
3.1.2
nominal size
DN/OD
nominal size (3.1.1), related to the
...
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