CEN/TS 15223:2025
(Main)Plastic piping systems - Structural design of buried thermoplastics piping systems - Procedure and guidance under various conditions of loading
Plastic piping systems - Structural design of buried thermoplastics piping systems - Procedure and guidance under various conditions of loading
This document specifies the procedure and gives guidance for structural design of buried thermoplastics piping systems under various conditions of loading for non-pressure application. This document can be used for pressure piping systems before applying operating pressure.
This document is applicable to all solid and structured wall thermoplastics piping systems covered by an EN standard developed by CEN/TC 155.
NOTE 1 PE piping systems for gas infrastructure are covered in EN 12007-2 [1].
This document gives guidance for structural design by either validated field experience or calculation, and contents of EN 476 [2], EN1295-1 [3] and EN 1610 [4] have been considered.
At the design stage, precise details of types of soil and installation conditions are not always available. The choice of design assumptions is left to the judgement of the designer/specifier. In this respect, this technical specification provides general indications and advice.
NOTE 2 It is the responsibility of the designer/specifier to make the appropriate selection of the design aspects, taking into account any relevant National regulation and installation practices or codes.
Kunststoff-Rohrleitungssysteme - Statische Bemessung erdverlegter Rohrleitungssysteme aus Thermoplasten - Verfahren und Empfehlungen unter verschiedenen Belastungsbedingungen
Dieses Dokument legt das Verfahren fest und enthält einen Leitfaden für die statische Bemessung von erdverlegten thermoplastischen Rohrleitungssystemen unter verschiedenen Belastungsbedingungen für drucklose Anwendungen. Dieses Dokument kann für Druckrohrleitungssysteme verwendet werden, bevor Betriebsdruck aufgebracht wird.
Dieses Dokument ist anwendbar auf alle thermoplastischen Rohrleitungssysteme mit Vollwand und profilierter Wandung, die von einer vom CEN/TC 155 erarbeiteten EN-Norm erfasst werden.
ANMERKUNG 1 PE-Rohrleitungssysteme für die Gasinfrastruktur werden in EN 12007 2 [1] behandelt.
Dieses Dokument enthält einen Leitfaden für die statische Bemessung auf der Grundlage validierter praktischer Erfahrungen oder Berechnungen, und die Inhalte von EN 476 [2], EN 1295-1 [3] und EN 1610 [4] wurden berücksichtigt.
In der Entwurfsphase sind nicht immer genaue Einzelheiten der Bodenarten und Verlegebedingungen verfügbar. Die Auswahl der Annahmen für Bemessungszwecke unterliegt dem Urteilsvermögen des Konstrukteurs/Planers. Diesbezüglich bietet diese technische Spezifikation allgemeine Hinweise und Ratschläge.
ANMERKUNG 2 Es liegt in der Verantwortung des Konstrukteurs/Planers, die geeignete Auswahl der Bemessungsaspekte zu treffen und dabei alle relevanten nationalen Vorschriften und Verlegeverfahren oder -regeln zu berücksichtigen.
Systèmes de canalisations en plastique - Conception structurelle des systèmes enterrés de canalisations en thermoplastique - Procédure et recommandations dans diverses conditions de charge
Cevni sistemi iz polimernih materialov - Konstrukcijsko načrtovanje vkopanih cevovodnih sistemov iz termoplastov - Postopek in smernice pri različnih pogojih obremenitve
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2025
Nadomešča:
SIST-TS CEN/TS 15223:2018
Cevni sistemi iz polimernih materialov - Konstrukcijsko načrtovanje vkopanih
cevovodnih sistemov iz termoplastov - Postopek in smernice pri različnih pogojih
obremenitve
Plastic piping systems - Structural design of buried thermoplastics piping systems -
Procedure and guidance under various conditions of loading
Kunststoff-Rohrleitungssysteme - Gültige Berechnungsparameter von erdverlegten
thermoplastischen Rohrleitungssystemen
Systèmes de canalisations en matières plastiques - Paramètres de calcul validés pour
les systèmes enterrés de canalisations en matières thermoplastiques
Ta slovenski standard je istoveten z: CEN/TS 15223:2025
ICS:
23.040.01 Deli cevovodov in cevovodi Pipeline components and
na splošno pipelines in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
CEN/TS 15223
TECHNICAL SPECIFICATION
SPÉCIFICATION TECHNIQUE
October 2025
TECHNISCHE SPEZIFIKATION
ICS 23.040.01 Supersedes CEN/TS 15223:2017
English Version
Plastic piping systems - Structural design of buried
thermoplastics piping systems - Procedure and guidance
under various conditions of loading
Systèmes de canalisations en plastique - Conception Kunststoff-Rohrleitungssysteme - Statische Bemessung
structurelle des systèmes enterrés de canalisations en erdverlegter Rohrleitungssysteme aus Thermoplasten -
thermoplastique - Procédure et recommandations dans Verfahren und Empfehlungen unter verschiedenen
diverses conditions de charge Belastungsbedingungen
This Technical Specification (CEN/TS) was approved by CEN on 11 August 2025 for provisional application.
The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to
submit their comments, particularly on the question whether the CEN/TS can be converted into a European Standard.
CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS
available promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in
parallel to the CEN/TS) until the final decision about the possible conversion of the CEN/TS into an EN is reached.
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. CEN/TS 15223:2025 E
worldwide for CEN national Members.
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Symbols and abbreviations . 7
4.1 Symbols . 7
4.2 Abbreviations . 9
5 Structural design . 9
5.1 General. 9
5.2 Procedure . 9
5.3 Design by graph . 9
5.3.1 Boundaries for design by graph . 9
5.3.2 Approach . 10
5.3.3 Deflection target values after backfilling (installation phase) . 11
5.3.4 The settlement phase . 11
5.3.5 Values for final relative deflection . 12
5.4 Design by calculation method . 14
5.4.1 Boundaries for design by calculation . 14
5.4.2 Approach . 14
5.4.3 Background . 14
5.4.4 Loads . 15
5.4.5 Ring deflection . 19
5.4.6 Ring forces . 24
5.4.7 Buckling . 26
Annex A (informative) Example structural design graph method . 29
A.1 Introduction . 29
A.2 The pipe ring stiffness to be prescribed . 29
A.3 The expected final deflection . 30
Annex B (informative) Example design by calculation method . 32
B.1 Introduction . 32
B.2 Input parameters . 32
B.3 Calculated data . 33
Annex C (informative) Time dependency of stress and strain . 35
Annex D (informative) Soil/pipe behaviour . 36
Annex E (informative) Typical limits of structural performance for non-pressure pipes . 37
Annex F (informative) Special conditions . 38
F.1 General. 38
F.2 Installation at depths shallower than the expected frost penetration . 38
Bibliography . 39
European foreword
This document (CEN/TS 15223:2025) has been prepared by Technical Committee CEN/TC 155 “Plastics
piping systems and ducting systems”, the secretariat of which is held by NEN.
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 CEN/TS 15223:2017.
CEN/TS 15223:2017:
— the title and scope have been changed;
— content related to functional design has been taken out. A separate document with guidance for
functional design aspects for buried thermoplastics piping systems is under development;
— a calculation method has been introduced in 5.4;
— examples on how to use the structural design graph and calculation method have been introduced in
Annex A and Annex B;
— guidance for design in special conditions has been introduced in Annex F.
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 announce this Technical Specification: 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.
Introduction
This document covers structural design of pressure and non-pressure thermoplastics piping systems.
Pressure and non-pressure thermoplastics piping system behave in the same way during installation and
during the time the system is without pressure but behave differently when pressurized. This behaviour
is explained in this document.
This document includes a structural design graph for small diameter pipes and a calculation method for
large diameter pipes. The basis for this is research carried out by The European Plastic Pipe and Fitting
Association, TEPPFA on structural performance with full-scale trials. This is described in the TEPPFA
studies “Design of buried plastics pipe systems” [5], and “Design of large diameter buried PE and PP pipes
without internal pressure” [18].
1 Scope
This document specifies the procedure and gives guidance for structural design of buried thermoplastics
piping systems under various conditions of loading for non-pressure application. This document can be
used for pressure piping systems before applying operating pressure.
This document is applicable to all solid and structured wall thermoplastics piping systems covered by an
EN standard developed by CEN/TC 155.
NOTE 1 PE piping systems for gas infrastructure are covered in EN 12007-2 [1].
This document gives guidance for structural design by either validated field experience or calculation,
and contents of EN 476 [2], EN 1295-1 [3] and EN 1610 [4] have been considered.
At the design stage, precise details of types of soil and installation conditions are not always available.
The choice of design assumptions is left to the judgement of the designer/specifier. In this respect, this
technical specification provides general indications and advice.
NOTE 2 It is the responsibility of the designer/specifier to make the appropriate selection of the design aspects,
taking into account any relevant National regulation and installation practices or codes.
2 Normative references
There are no normative references in this document.
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
nominal ring stiffness
SN
numerical designation of the ring stiffness of a pipe or fitting, which is a convenient round number,
relative to the determined stiffness in kilonewtons per square metre (kN/m ), indicating the minimum
required ring stiffness of the pipe or fitting
Note 1 to entry: It is designated by the letters “SN” followed by the appropriate number and are normally expressed
in classes
[SOURCE: ISO 13966:1998, 3.1]
3.2
standard dimension ratio
SDR
numerical designation of a pipe series, which is a convenient round number, approximately equal to the
dimension ratio of
...
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