SIST-TP CEN/TR 12108:2012

Plastics piping systems - Guidance for the installation inside buildings of pressure piping systems for hot and cold water intended for human consumption

This European Technical Report recommends practices to be followed in the application and installation of thermoplastics pipes and associated fittings. These fall within the scope of EN 806-1 and, EN ISO 15874, EN ISO 15875, EN ISO 15876, EN ISO 15877 and EN ISO 22391 to be used for hot and/or cold water distribution intended for human consumption inside buildings. This document can also be used for heating installations if applicable, except for under floor heating for which EN 12164 can apply.
Guidance is also given on acceptable methods of jointing polybutylene (PB), crosslinked polyethylene (PE X), polypropylene (PP), chlorinated poly(vinyl chloride) (PVC-C) and Polyethylene of raised temperature resistance (PE-RT) pipes and associated fittings, together with recommendations for their storage, handling and transportation.

Kunststoff-Rohrleitungssyteme - Empfehlungen zum Einbau von Druckrohrleitungssystemen für die Versorgung mit Warm- und Kaltwasser für den menschlichen Gebrauch innerhalb von Gebäuden

Dieser Europäische Fachbericht enthält Empfehlungen für die Installation von thermoplastischen Rohren und zugehörigen Rohrverbindungsstücken. Diese Rohrleitungssysteme fallen in den Anwendungsbereich der EN 806-1 sowie der EN ISO 15874, EN ISO 15875, EN ISO 15876, EN ISO 15877 und EN ISO 22391. Sie werden für Warm- und/oder Kaltwasserleitungen innerhalb von Gebäuden für den Transport von Wasser, das für den menschlichen Gebrauch bestimmt ist, eingesetzt. Falls zutreffend, kann diese Norm ebenfalls für Heizungsinstallationen, ausgenommen Fußbodenheizungen für die EN 12164 gelten kann, angewendet werden.
Hinweise zu Verbindungsverfahren bei Rohren aus Polybuten (PB), vernetztem Polyethylen (PE X), Polypropylen (PP), chloriertem Polyvinylchlorid (PVC-C) und Poly¬ethylen erhöhter Temperaturbeständigkeit (PE-RT) sowie zugehörigen Rohrverbindungsstücken werden zusammen mit Empfehlungen für die Lagerung, Handhabung und den Transport gegeben.

Systèmes de canalisations plastiques - Guide pour l'installation à l'intérieur de structures de bâtiments de systèmes de canalisations sous pression pour l'eau chaude et l’eau froide destinées à la consommation humaine

Le présent Rapport technique européen recommande les pratiques à suivre pour la mise en œuvre et l’installation de tubes en thermoplastiques et des raccords associés. Ceux-ci sont dans les domaines d’applications de l’EN 806-1, et l’EN ISO 15874, l’EN ISO 15875, l’EN ISO 15876, l’EN ISO 15877 et l’EN ISO 22391, à utiliser pour la distribution d’eau chaude et/ou d’eau froide destinées à la consommation humaine à l’intérieur des bâtiments. Le présent document peut aussi être utilisé pour les installations de chauffage, à l’exception du chauffage par le sol pour lequel l’EN 12164 peut être utilisée.
Il donne aussi des lignes directrices sur les méthodes acceptables d’assemblage des tubes et de leurs raccords en polybutylène (PB), polyéthylène réticulé (PE-X), polypropylène (PP), poly(chlorure de vinyle) chloré (PVC-C) et polyéthylène de meilleure résistance à la température (PE-RT), ainsi que des recommandations pour leur stockage, leur manipulation et leur transport.

Cevni sistemi iz polimernih materialov - Navodila za vgradnjo tlačnih cevovodov za hladno in toplo pitno vodo v stavbah

To evropsko tehnično poročilo določa priporočene prakse, ki jih je treba upoštevati pri uporabi in vgradnji plastomernih cevi in fitingov. Ti spadajo v področje uporabe standardov EN 806-1, EN ISO 15874, EN ISO 15875, EN ISO 15876, EN ISO 15877 in EN ISO 22391, ki se uporabljajo za porazdelitev hladne in tople pitne vode v stavbah. Ta dokument se lahko po potrebi uporablja tudi za grelne inštalacije, razen za talno gretje, za katerega se lahko uporablja standard EN 12164.
Vsebuje tudi navodila o sprejemljivih metodah za povezovanje cevi in fitingov iz polibutilena (PB), zamreženega polietilena (PE-X), polipropilena (PP), kloriranega polivinilklorida (PVC-C) in polietilena s povišano temperaturno odpornostjo (PE-RT), skupaj s priporočili za njihovo shranjevanje, prevoz in ravnanje z njimi.

General Information

• Status: Published
• Public Enquiry End Date: 14-Jun-2011
• Publication Date: 10-Apr-2012
• ICS: 23.040.01 - Pipeline components and pipelines in general
• ICS: 91.140.60 - Water supply systems
• Technical Committee: PCV - Plastic pipes, fittings and valves
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 12-Mar-2012
• Due Date: 17-May-2012
• Completion Date: 11-Apr-2012
• Directive: 89/106/EEC - Construction products
• Ref Project: CEN/TR 12108:2012 - Plastics piping systems - Guidance for the installation inside buildings of pressure piping systems for hot and cold water intended for human consumption

Relations

• Replaces: SIST ENV 12108:2002 - Plastics piping systems - Guidance for the installation inside buildings of pressure piping systems for hot and cold water intended for human consumption
• Effective Date: 01-May-2012
• Replaces: SIST ENV 12108:2002 - Plastics piping systems - Guidance for the installation inside buildings of pressure piping systems for hot and cold water intended for human consumption
• Effective Date: 08-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
kSIST-TP FprCEN/TR 12108:2011
01-maj-2011
&HYQLVLVWHPLL]SROLPHUQLKPDWHULDORY1DYRGLOD]DYJUDGQMRWODþQLKFHYRYRGRY]D
KODGQRLQWRSORSLWQRYRGRYVWDYEDK
Plastics piping systems - Guidance for the installation inside buildings of pressure piping
systems for hot and cold water intended for human consumption
Kunststoff-Rohrleitungssyteme - Empfehlungen zum Einbau von
Druckrohrleitungssystemen für die Versorgung mit Warm- und Kaltwasser für den
menschlichen Gebrauch innerhalb von Gebäuden
Systèmes de canalisations plastiques - Guide pour l'installation à l'intérieur de structures
de bâtiments de systèmes de canalisations sous pression pour l'eau chaude et l’eau
froide destinées à la consommation humaine
Ta slovenski standard je istoveten z: FprCEN/TR 12108
ICS:
23.040.01 Deli cevovodov in cevovodi Pipeline components and
na splošno pipelines in general
91.140.60 Sistemi za oskrbo z vodo Water supply systems
kSIST-TP FprCEN/TR 12108:2011 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

kSIST-TP FprCEN/TR 12108:2011

---------------------- Page: 2 ----------------------

kSIST-TP FprCEN/TR 12108:2011


TECHNICAL REPORT
FINAL DRAFT
FprCEN/TR 12108
RAPPORT TECHNIQUE

TECHNISCHER BERICHT

March 2011
ICS 91.140.60; 23.040.01 Will supersede ENV 12108:2001
English Version
Plastics piping systems - Guidance for the installation inside
buildings of pressure piping systems for hot and cold water
intended for human consumption
Systèmes de canalisations plastiques - Guide pour Kunststoff-Rohrleitungssyteme - Empfehlungen zum
l'installation à l'intérieur de structures de bâtiments de Einbau von Druckrohrleitungssystemen für die Versorgung
systèmes de canalisations sous pression pour l'eau chaude mit Warm- und Kaltwasser für den menschlichen Gebrauch
et l'eau froide destinées à la consommation humaine innerhalb von Gebäuden


This draft Technical Report is submitted to CEN members for Technical Committee Approval. It has been drawn up by the Technical
Committee CEN/TC 155.

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 Technical Report. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a Technical Report.


EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2011 CEN All rights of exploitation in any form and by any means reserved Ref. No. FprCEN/TR 12108:2011: E
worldwide for CEN national Members.

---------------------- Page: 3 ----------------------

kSIST-TP FprCEN/TR 12108:2011
FprCEN/TR 12108:2011 (E)
Contents Page
Foreword .4
Introduction .5
1 Scope .6
2 Normative references .6
3 Terms and definitions .6
4 Storage, transport and handling .6
4.1 General .6
4.2 Storage .6
4.3 Handling .6
4.4 Transport .7
5 Design considerations .7
5.1 Service conditions .7
5.2 Materials and components .7
6 Installation .7
6.1 Pipe supports - General .7
6.2 Installation of pipes allowing thermal length variation.7
6.2.1 General .7
6.2.2 Positioning of anchor points .8
6.2.3 Installation of pipes allowing thermal length variation by means of a flexible arm .8
6.2.4 Installation of pipes allowing expansion by means of an expansion loop . 10
6.2.5 Installation of pipes allowing thermal length variation and with continuous support and
supporting guide brackets . 11
6.2.6 Installation of pipes allowing thermal length variation and with supporting guide bracket . 13
6.2.7 Installation of pipes on continuous horizontal supports . 14
6.3 Installation of pipes not allowing thermal length variation (for PE-X, PB, PP and PE-RT) . 14
6.3.1 General . 14
6.3.2 Positioning of anchor points (for PE-X, PB, PP and PE-RT) . 14
6.3.3 Installation of pipes between anchor points not allowing thermal length variation where
pipe support is continuous (for PE-X, PB PP and PE-RT) . 15
6.3.4 Installation of pipes between anchor points not allowing thermal length variation with
supporting guide brackets (for PE-X, PB, PP and PE-RT) . 16
6.3.5 Installation of pipes supported only at the anchor points (for PE-X, PB, PP and PE-RT) . 17
6.4 Embedded pipes . 18
6.4.1 Pipes laid within protective pipes or ducts and/or insulation . 18
6.4.2 Embedded bare pipes . 19
6.5 Pipes and protective pipes hanging or looping free . 19
7 Jointing . 21
7.1 General . 21
7.2 Preparation of pipe . 21
7.3 Jointing procedures . 21
7.3.1 Compression fittings and crimped fittings . 21
7.3.2 Flanged fittings . 21
7.3.3 Flat-seat union fittings . 22
7.4 Solvent-cement or adhesive-bonded fittings . 22
7.5 Fused joints . 22
8 Boiler and instantaneous water heaters connections . 22
9 Painting . 22
2

---------------------- Page: 4 ----------------------

kSIST-TP FprCEN/TR 12108:2011
FprCEN/TR 12108:2011 (E)
10 Filling and inspection . 22
10.1 General . 22
10.2 Testing and commissioning . 23
10.2.1 General . 23
10.2.2 Test procedure A . 23
10.2.3 Test procedure B . 23
Annex A (informative) Thermal length variation as a function of the pipe length and temperature
difference for pipe materials . 25
Bibliography . 28

3

---------------------- Page: 5 ----------------------

kSIST-TP FprCEN/TR 12108:2011
FprCEN/TR 12108:2011 (E)
Foreword
This document (FprCEN/TR 12108:2011) 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 Technical Committee Approval.
This document will supersede ENV 12108:2001.
This document includes the following:
 Annex A (informative), Thermal length variation as a function of the pipe length and temperature
difference for pipe materials;
 a bibliography.
At the date of publication of this Technical Report, System Standards for piping systems of hot and cold water
applications inside buildings are the following:
 EN ISO 15874 (all parts), Plastics piping systems for hot and cold water installations — Polypropylene
(PP);
 EN ISO 15875 (all parts), Plastics piping systems for hot and cold water installations — Crosslinked
polyethylene (PE-X);
 EN ISO 15876 (all parts), Plastics piping systems for hot and cold water installations — Polybutylene
(PB);
 EN ISO 15877 (all parts), Plastics piping systems for hot and cold water installations — Chlorinated
poly(vinyl chloride) (PVC-C);
 EN ISO 22391 (all parts), Plastics piping systems for hot and cold water installations — Polyethylene of
raised temperature resistance (PE-RT).
4

---------------------- Page: 6 ----------------------

kSIST-TP FprCEN/TR 12108:2011
FprCEN/TR 12108:2011 (E)
Introduction
This European Technical Report covers the material-related aspects of installation practice. General
requirements including design consideration and pipe sizing are given in EN 806 series.
It is essential when dealing with techniques for the installation inside buildings of pressure piping systems to
choose the correct type of products for the installation and that a well-established installation technique is
used. The system supplier/manufacturer should supply detailed instructions for satisfactory handling, storage
and installation.
5

---------------------- Page: 7 ----------------------

kSIST-TP FprCEN/TR 12108:2011
FprCEN/TR 12108:2011 (E)
1 Scope
This European Technical Report recommends practices to be followed in the application and installation of
thermoplastics pipes and associated fittings. These fall within the scope of EN 806-1 and, EN ISO 15874,
EN ISO 15875, EN ISO 15876, EN ISO 15877 and EN ISO 22391 to be used for hot and/or cold water
distribution intended for human consumption inside buildings. This document can also be used for heating
installations if applicable, except for under floor heating for which EN 12164 can apply.
Guidance is also given on acceptable methods of jointing polybutylene (PB), crosslinked polyethylene (PE-X),
polypropylene (PP), chlorinated poly(vinyl chloride) (PVC-C) and Polyethylene of raised temperature
resistance (PE-RT) pipes and associated fittings, together with recommendations for their storage, handling
and transportation.
2 Normative references
The following referenced documents are indispensable for the application 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 806-1, Specifications for installations inside buildings conveying water for human consumption — Part 1:
General
3 Terms and definitions
For the purposes of this Technical Report, the terms and definitions given in EN 806-1 apply.
4 Storage, transport and handling
4.1 General
Pipe ends should be covered or protected in such a way that dirt is prevented from entering the pipe.
Pipe with end treatment, such as flanging, forming or pre-assembled fittings, should be stacked or supported
so that the ends are free from loading and damage.
When storing, transporting and handling, original packing should be used if possible.
4.2 Storage
The storage chosen should not cause any change to pipe dimensions and the storage area should be such
that it does not cause any damage to the pipe surface.
All fittings and accessories should be stored in their original containers, or as recommended by the system
supplier/manufacturer.
Storage in direct sunlight should be avoided, as extended exposure to UV light can lead to deterioration.
4.3 Handling
Loading and unloading of pipes should be carried out with care to avoid damage.
Where mechanical handling is employed, the techniques used should ensure that no damage to pipes can
occur. Metal slings, hooks and chains should not come into contact with the pipe.
Pipes should not be dragged along rough ground or dropped on a hard surface.
6

---------------------- Page: 8 ----------------------

kSIST-TP FprCEN/TR 12108:2011
FprCEN/TR 12108:2011 (E)
4.4 Transport
Vehicles with a flat bed should be used for transporting pipe. The bed should be free from nails or other
projections. Straight lengths should be uniformly supported along their length.
Pipes should be loaded on vehicles in such a way that there is no unnecessary overhang.
5 Design considerations
5.1 Service conditions
The installed pipe work system should be capable of operation at the applicable service conditions in
accordance with classes specified in EN ISO 15874, EN ISO 15875, EN ISO 15876 EN ISO 15877 and
EN ISO 22391.
5.2 Materials and components
Components for hot and cold water pipes should alternatively conform to EN ISO 15874, EN ISO 15875,
EN ISO 15876, EN ISO 15877 and EN ISO 22391.
6 Installation
6.1 Pipe supports - General
Pipe supports should be designed to provide a permanent fixing. Where fittings such as valves and manual
controls are used, these should be firmly anchored so as to minimize any moment imparted to the pipe by
operation e.g. of hand wheels or levers.
Spacing distances should be in accordance with the system supplier’s/manufacturer's installation instructions.
Clamps/brackets to support pipe should be designed in such a way that the function of the piping system is
not affected. Where pipes are adequately supported through joists or on boarding, intermediate clips may not
be necessary.
6.2 Installation of pipes allowing thermal length variation
6.2.1 General
NOTE Annex A shows the thermal length variation ∆L as function of length of pipe and temperature difference for,
PE-X, PP-R, PB, PVC-C and PE-RT.
Pipes are subjected to thermal length variation, which requires consideration to prevent any damage,
particularly for rigid pipes. There are different ways to consider this.
Thermal length variation of a thermoplastic pipe can be calculated according to Equation (1):
∆L = ∆T × L × α (1)
where
∆L is the thermal length variation, in millimetres;
∆T is the temperature difference, in Kelvin;
L is the length of pipe, in metres;
7

---------------------- Page: 9 ----------------------

kSIST-TP FprCEN/TR 12108:2011
FprCEN/TR 12108:2011 (E)
α is the coefficient of thermal expansion (thermal length variation), in millimetres per metre, per
Kelvin.
Reference values for α are given in Table 1.
Table 1  Reference values of thermal length variation
Material αααα Figure
mm/m K
PVC-C 0,07 A.1
PE-X 0,15 A.2
PP-R 0,15 A.2
PB 0,13 A.3
PE-RT 0,19 A4

6.2.2 Positioning of anchor points
The positioning of anchor points can be used to give direction and to limit to the amount of thermal length
variation. The anchor points can be positioned in such a way that variations of lengths can be split in different
directions. Examples are given in Figures 1 to 3.
This is also valid for header pipes in a basement.

Figure 1  Positioning of anchor points to
guide the direction of thermal length variation (installation with branches)
6.2.3 Installation of pipes allowing thermal length variation by means of a flexible arm
The flexible arm shoul
...

SLOVENSKI STANDARD
SIST-TP CEN/TR 12108:2012
01-maj-2012
1DGRPHãþD
SIST ENV 12108:2002
&HYQLVLVWHPLL]SROLPHUQLKPDWHULDORY1DYRGLOD]DYJUDGQMRWODþQLKFHYRYRGRY]D
KODGQRLQWRSORSLWQRYRGRYVWDYEDK
Plastics piping systems - Guidance for the installation inside buildings of pressure piping
systems for hot and cold water intended for human consumption
Kunststoff-Rohrleitungssyteme - Empfehlungen zum Einbau von
Druckrohrleitungssystemen für die Versorgung mit Warm- und Kaltwasser für den
menschlichen Gebrauch innerhalb von Gebäuden
Systèmes de canalisations plastiques - Guide pour l'installation à l'intérieur de structures
de bâtiments de systèmes de canalisations sous pression pour l'eau chaude et l’eau
froide destinées à la consommation humaine
Ta slovenski standard je istoveten z: CEN/TR 12108:2012
ICS:
23.040.01 Deli cevovodov in cevovodi Pipeline components and
na splošno pipelines in general
91.140.60 Sistemi za oskrbo z vodo Water supply systems
SIST-TP CEN/TR 12108:2012 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST-TP CEN/TR 12108:2012

---------------------- Page: 2 ----------------------

SIST-TP CEN/TR 12108:2012


TECHNICAL REPORT
CEN/TR 12108

RAPPORT TECHNIQUE

TECHNISCHER BERICHT
February 2012
ICS 91.140.60; 23.040.01 Supersedes ENV 12108:2001
English Version
Plastics piping systems - Guidance for the installation inside
buildings of pressure piping systems for hot and cold water
intended for human consumption
Systèmes de canalisations plastiques - Guide pour Kunststoff-Rohrleitungssyteme - Empfehlungen zum
l'installation à l'intérieur de structures de bâtiments de Einbau von Druckrohrleitungssystemen für die Versorgung
systèmes de canalisations sous pression pour l'eau chaude mit Warm- und Kaltwasser für den menschlichen Gebrauch
et l'eau froide destinées à la consommation humaine innerhalb von Gebäuden


This Technical Report was approved by CEN on 25 July 2011. It has been drawn up by the Technical Committee CEN/TC 155.

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, Turkey and United Kingdom.





EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2012 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TR 12108:2012: E
worldwide for CEN national Members.

---------------------- Page: 3 ----------------------

SIST-TP CEN/TR 12108:2012
CEN/TR 12108:2012 (E)
Contents Page
Foreword .4
Introduction .5
1 Scope .6
2 Normative references .6
3 Terms and definitions .6
4 Storage, transport and handling .6
4.1 General .6
4.2 Storage .6
4.3 Handling .6
4.4 Transport .7
5 Design considerations .7
5.1 Service conditions .7
5.2 Materials and components .7
6 Installation .7
6.1 Pipe supports - General .7
6.2 Installation of pipes allowing thermal length variation.7
6.2.1 General .7
6.2.2 Positioning of anchor points .8
6.2.3 Installation of pipes allowing thermal length variation by means of a flexible arm .8
6.2.4 Installation of pipes allowing expansion by means of an expansion loop . 10
6.2.5 Installation of pipes allowing thermal length variation and with continuous support and
supporting guide brackets . 11
6.2.6 Installation of pipes allowing thermal length variation and with supporting guide bracket . 13
6.2.7 Installation of pipes on continuous horizontal supports . 14
6.3 Installation of pipes not allowing thermal length variation (for PE-X, PB, PP and PE-RT) . 14
6.3.1 General . 14
6.3.2 Positioning of anchor points (for PE-X, PB, PP and PE-RT) . 14
6.3.3 Installation of pipes between anchor points not allowing thermal length variation where
pipe support is continuous (for PE-X, PB PP and PE-RT) . 15
6.3.4 Installation of pipes between anchor points not allowing thermal length variation with
supporting guide brackets (for PE-X, PB, PP and PE-RT) . 16
6.3.5 Installation of pipes supported only at the anchor points (for PE-X, PB, PP and PE-RT) . 17
6.4 Embedded pipes . 18
6.4.1 Pipes laid within protective pipes or ducts and/or insulation . 18
6.4.2 Embedded bare pipes . 19
6.5 Pipes and protective pipes hanging or looping free . 19
7 Jointing . 21
7.1 General . 21
7.2 Preparation of pipe . 21
7.3 Jointing procedures . 21
7.3.1 Compression fittings and crimped fittings . 21
7.3.2 Flanged fittings . 21
7.3.3 Flat-seat union fittings . 22
7.4 Solvent-cement or adhesive-bonded fittings . 22
7.5 Fused joints . 22
8 Boiler and instantaneous water heaters connections . 22
9 Painting . 22
2

---------------------- Page: 4 ----------------------

SIST-TP CEN/TR 12108:2012
CEN/TR 12108:2012 (E)
10 Filling and inspection . 22
10.1 General . 22
10.2 Testing and commissioning . 23
10.2.1 General . 23
10.2.2 Test procedure A . 23
10.2.3 Test procedure B . 23
Annex A (informative) Thermal length variation as a function of the pipe length and temperature
difference for pipe materials . 25
Bibliography . 28

3

---------------------- Page: 5 ----------------------

SIST-TP CEN/TR 12108:2012
CEN/TR 12108:2012 (E)
Foreword
This document (CEN/TR 12108:2012) 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 [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes ENV 12108:2001.
This document includes the following:
 Annex A (informative), Thermal length variation as a function of the pipe length and temperature
difference for pipe materials;
 a bibliography.
At the date of publication of this Technical Report, System Standards for piping systems of hot and cold water
applications inside buildings are the following:
 EN ISO 15874 (all parts), Plastics piping systems for hot and cold water installations — Polypropylene
(PP);
 EN ISO 15875 (all parts), Plastics piping systems for hot and cold water installations — Crosslinked
polyethylene (PE-X);
 EN ISO 15876 (all parts), Plastics piping systems for hot and cold water installations — Polybutylene
(PB);
 EN ISO 15877 (all parts), Plastics piping systems for hot and cold water installations — Chlorinated
poly(vinyl chloride) (PVC-C);
 EN ISO 22391 (all parts), Plastics piping systems for hot and cold water installations — Polyethylene of
raised temperature resistance (PE-RT).
4

---------------------- Page: 6 ----------------------

SIST-TP CEN/TR 12108:2012
CEN/TR 12108:2012 (E)
Introduction
This European Technical Report covers the material-related aspects of installation practice. General
requirements including design consideration and pipe sizing are given in EN 806 series.
It is essential when dealing with techniques for the installation inside buildings of pressure piping systems to
choose the correct type of products for the installation and that a well-established installation technique is
used. The system supplier/manufacturer should supply detailed instructions for satisfactory handling, storage
and installation.
5

---------------------- Page: 7 ----------------------

SIST-TP CEN/TR 12108:2012
CEN/TR 12108:2012 (E)
1 Scope
This European Technical Report recommends practices to be followed in the application and installation of
thermoplastics pipes and associated fittings. These fall within the scope of EN 806-1 and, EN ISO 15874,
EN ISO 15875, EN ISO 15876, EN ISO 15877 and EN ISO 22391 to be used for hot and/or cold water
distribution intended for human consumption inside buildings. This document can also be used for heating
installations if applicable, except for under floor heating for which EN 12164 can apply.
Guidance is also given on acceptable methods of jointing polybutylene (PB), crosslinked polyethylene (PE-X),
polypropylene (PP), chlorinated poly(vinyl chloride) (PVC-C) and Polyethylene of raised temperature
resistance (PE-RT) pipes and associated fittings, together with recommendations for their storage, handling
and transportation.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
EN 806-1, Specifications for installations inside buildings conveying water for human consumption — Part 1:
General
3 Terms and definitions
For the purposes of this Technical Report, the terms and definitions given in EN 806-1 apply.
4 Storage, transport and handling
4.1 General
Pipe ends should be covered or protected in such a way that dirt is prevented from entering the pipe.
Pipe with end treatment, such as flanging, forming or pre-assembled fittings, should be stacked or supported
so that the ends are free from loading and damage.
When storing, transporting and handling, original packing should be used if possible.
4.2 Storage
The storage chosen should not cause any change to pipe dimensions and the storage area should be such
that it does not cause any damage to the pipe surface.
All fittings and accessories should be stored in their original containers, or as recommended by the system
supplier/manufacturer.
Storage in direct sunlight should be avoided, as extended exposure to UV light can lead to deterioration.
4.3 Handling
Loading and unloading of pipes should be carried out with care to avoid damage.
Where mechanical handling is employed, the techniques used should ensure that no damage to pipes can
occur. Metal slings, hooks and chains should not come into contact with the pipe.
Pipes should not be dragged along rough ground or dropped on a hard surface.
6

---------------------- Page: 8 ----------------------

SIST-TP CEN/TR 12108:2012
CEN/TR 12108:2012 (E)
4.4 Transport
Vehicles with a flat bed should be used for transporting pipe. The bed should be free from nails or other
projections. Straight lengths should be uniformly supported along their length.
Pipes should be loaded on vehicles in such a way that there is no unnecessary overhang.
5 Design considerations
5.1 Service conditions
The installed pipe work system should be capable of operation at the applicable service conditions in
accordance with classes specified in EN ISO 15874, EN ISO 15875, EN ISO 15876 EN ISO 15877 and
EN ISO 22391.
5.2 Materials and components
Components for hot and cold water pipes should alternatively conform to EN ISO 15874, EN ISO 15875,
EN ISO 15876, EN ISO 15877 and EN ISO 22391.
6 Installation
6.1 Pipe supports - General
Pipe supports should be designed to provide a permanent fixing. Where fittings such as valves and manual
controls are used, these should be firmly anchored so as to minimize any moment imparted to the pipe by
operation e.g. of hand wheels or levers.
Spacing distances should be in accordance with the system supplier’s/manufacturer's installation instructions.
Clamps/brackets to support pipe should be designed in such a way that the function of the piping system is
not affected. Where pipes are adequately supported through joists or on boarding, intermediate clips may not
be necessary.
6.2 Installation of pipes allowing thermal length variation
6.2.1 General
NOTE Annex A shows the thermal length variation ∆L as function of length of pipe and temperature difference for,
PE-X, PP-R, PB, PVC-C and PE-RT.
Pipes are subjected to thermal length variation, which requires consideration to prevent any damage,
particularly for rigid pipes. There are different ways to consider this.
Thermal length variation of a thermoplastic pipe can be calculated according to Formula (1):
∆L = ∆T × L × α (1)
where
∆L is the thermal length variation, in millimetres;
∆T is the temperature difference, in Kelvin;
L is the length of pipe, in metres;
7

---------------------- Page: 9 ----------------------

SIST-TP CEN/TR 12108:2012
CEN/TR 12108:2012 (E)
α is the coefficient of thermal expansion (thermal length variation), in millimetres per metre, per
Kelvin.
Reference values for α are given in Table 1.
Table 1  Reference values of thermal length variation
Material αααα Figure
mm/m K
PVC-C 0,07 A.1
PE-X 0,15 A.2
PP-R 0,15 A.2
PB 0,13 A.3
PE-RT 0,19 A4

6.2.2 Positioning of anchor points
The positioning of anchor points can be used to give direction and to limit to the amount of thermal length
variation. The anchor points can be positioned in such a way that variations of lengths can be split in different
directions. Examples are given in Figures 1 to 3.
This is also valid for header pipes in a basement.

Figure 1  Positioning of anchor points to
guide the direction of thermal length variation (installation with branches)
6.2.3 Installation of pipes allowing thermal length variation by means of a flexible arm
The flexible arm should be sufficiently long to prevent damage.
8

-------------
...