SIST-TS CEN/TS 14807:2014

SLOVENSKI STANDARD
01-februar-2014
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SIST-TS CEN/TS 14807:2005
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Plastics piping systems - Glass-reinforced thermosetting plastics (GRP) based on
unsaturated polyester resin (UP) - Guidance for the structural analysis of buried GRP-UP
pipelines
Kunststoff-Rohrleitungssysteme - Glasfaserverstärkte duroplastische Kunststoffe (GFK)
auf der Basis von ungesättigtem Polyesterharz (UP) - Anleitung für die statische
Berechnung von erdverlegten GFK-UP-Rohrleitungen
Systèmes de canalisations en plastiques - Plastiques thermodurcissables renforcés de
verre (PRV) à base de résine polyester non saturé (UP) - Guide pour l’analyse
structurale de conduites PRV-UP enterrées
Ta slovenski standard je istoveten z: CEN/TS 14807:2013
ICS:
23.040.20 Cevi iz polimernih materialov Plastics pipes
83.120 2MDþDQLSROLPHUL Reinforced plastics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

TECHNICAL SPECIFICATION
CEN/TS 14807
SPÉCIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION
December 2013
ICS 91.140.60; 91.140.80; 93.030; 23.040.01 Supersedes CEN/TS 14807:2004
English Version
Plastics piping systems - Glass-reinforced thermosetting plastics
(GRP) based on unsaturated polyester resin (UP) - Guidance for
the structural analysis of buried GRP-UP pipelines
Systèmes de canalisations en plastiques - Plastiques Kunststoff-Rohrleitungssysteme - Glasfaserverstärkte
thermodurcissables renforcés de verre (PRV) à base de duroplastische Kunststoffe (GFK) auf der Basis von
résine polyester non saturé (UP) - Guide pour l'analyse ungesättigtem Polyesterharz (UP) - Anleitung für die
structurale de conduites PRV-UP enterrées statische Berechnung von erdverlegten GFK-UP-
Rohrleitungen
This Technical Specification (CEN/TS) was approved by CEN on 10 September 2013 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, Former Yugoslav Republic of Macedonia, 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

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2013 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TS 14807:2013 E
worldwide for CEN national Members.

Contents Page
Foreword .3
Introduction .4
1 Scope .5
2 Normative references .5
3 Terms and definitions .6
4 Requirements .8
5 Classification and designation .9
Bibliography . 12

Foreword
This document (CEN/TS 14807:2013) 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 CEN/TS 14807:2004.
The following is a list of the major technical changes that have been made since the previous edition:
a) revised wording to reflect the revisions to GRP product standards EN 1796 and EN 14364;
b) revised wording to improve clarity of presentation.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to announce this Technical Specification: Austria, Belgium, Bulgaria, Croatia, Cyprus,
Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany,
Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Introduction
The purpose of this document is to provide guidance for the selection of a suitable structural analysis
procedure for buried glass-reinforced thermosetting plastics (GRP) pipes. The design approach should be
founded on accepted engineering principles and have been demonstrated through field experience. The
procedure should satisfy the requirements of GRP pipes and should provide dependable long-term
performance.
The limiting performance criteria for buried glass-reinforced thermosetting plastics (GRP) pipes are different
than other pipe products, including thermoplastics pipes. Consequently, any recommendations on the use of
GRP products should take these differences into consideration. Additionally, the method of structural analysis
should accommodate these limiting performance criteria, so guidance on suitable design limits are given. Any
structural analysis procedure may be used provided it includes the assessment of short and long-term
deflection and buckling resistance. Established structural analysis procedures, although found satisfactory for
other materials, may not meet the needs of GRP.
1 Scope
This Technical Specification, which is a guidance document for use with a structural analysis procedure for
below ground installations, covers limits applicable to glass-reinforced thermosetting plastics (GRP) pipes
used for the conveyance of liquids under pressure or gravity conditions.
This document does not specify a particular structural analysis procedure but gives guidance on the selection
of a structural analysis procedure. It concludes that any established structural analysis procedure may be
used provided it includes the assessment of short and long-term deflection and buckling resistance.
Products complying to the applicable GRP product standards EN 1796 or EN 14364, which are not subject to
internal pressure, are suitable as long as the analysis shows that the long-term deflection of the installed pipes
is limited to 6 %, which is the basic assumption of the GRP pipe product standards. Products complying with
the applicable system standards (EN 1796 or EN 14364), which are subject to internal pressure, are suitable
as long as the analysis shows that the initial deflection of the installed pipes does not exceed 3 %.
NOTE The approach followed when preparing a general structural analysis procedure does not depend on the
nominal size(s) of the pipe(s).
A suitable structural analysis procedure should normally be capable of being used for pipes operating at
different temperatures provided that the corresponding temperature re-rating factors for the relevant pipe
properties are applied, as specified in the referring standard(s). Nevertheless, high service temperatures may
require an additional analysis of the longitudinal stresses and strains and/or a special design of the joints.
Normal structural analysis procedures are intended to cover normal soil installation conditions. Pipes to be
designed for installations in abnormal or unusual conditions, e.g. in quick soils or a marine sea-bed, may
require special engineering. Some structural analysis procedures may include axial effects depending upon
the type of joint used.
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 805, Water supply - Requirements for systems and components outside buildings
EN 1610, Construction and testing of drains and sewers
EN 1796:2013, Plastics piping systems for water supply with or without pressure - Glass-reinforced
thermosetting plastics (GRP) based on unsaturated polyester resin (UP)
EN 14364:2013, Plastics piping systems for drainage and sewerage with or without pressure - Glass-
reinforced thermosetting plastics (GRP) based on unsaturated polyester resin (UP) - Specifications for pipes,
fittings and joints
ISO 7685, Plastics piping systems - Glass-reinforced thermosetting plastics (GRP) pipes - Determination of
initial specific ring stiffness
ISO 10928, Plastics piping systems - Glass-reinforced thermosetting plastics (GRP) pipes and fittings -
Methods for regression analysis and their use
ISO 10466, Plastics piping systems - Glass-reinforced thermosetting plastics (GRP) pipes - Test method to
prove the resistance to initial ring deflection
ISO 10471, Glass-reinforced thermosetting plastics (GRP) pipes - Determination of the long-term ultimate
bending strain and the long-term ultimate relative ring deflection under wet conditions
ISO 10952, Plastics piping systems - Glass-reinforced thermosetting plastics (GRP) pipes and fittings -
Determination of the resistance to chemical attack for the inside of a section in a deflected condition
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
NOTE For a more complete listing of terms and definitions for GRP pipes, see EN 1796:2013 and EN 14364:2013.
3.1
nominal pressure
PN
alphanumerical designation for pressure classification purposes, which has a numerical value equal to the
resistance of a component of a piping system to internal pressure, when expressed in bars
Note 1 to entry: The designation for reference or marking purposes consists of the letters PN plus a number.
3.2
nominal size
DN
alphanumerical designation of size of component, which is a convenient integer approximately equal to a
manufacturing dimension in millimetres and which can apply to either the internal diameter (DN-ID) or the
external diameter (DN-OD)
Note 1 to entry: The designation for reference or marking purposes consists of the letters DN-ID or DN-OD plus a
number.
3.3
nominal stiffness
SN
alphanumerical designation for stiffness classification purposes, which has the same numerical value as the
minimum initial value required, when expressed in newtons per square metre (N/m )
Note 1 to entry: The designation for reference or marking purposes consists of the letters SN plus a number.
3.4
specific ring stiffness
S
physical characteristic of the pipe, expressed in newtons per square metre
Note 1 to entry: It is a measure of the resistance to ring deflection per metre length under external load and is defined
by Formula (1):
(1)
E× I
S=
d
m
where
E is the apparent modulus of elasticity as determined in a ring stiffness test, in newtons per square
metre (N/m );
I is the second moment of area in the longitudinal direction per metre length, in metres to the fourth

power per metre, (m /m) i.e.
(2)
e
I=
where
e is the wall thickness, in metres (m);
is the mean diameter of the pipe, in metres (m).
d
m
3.5
initial specific ring stiffness
S
value of S obtained when tested in accordance with ISO 7685, in newtons per square metre (N/m )
3.6
re-rating factor
R
RF
multiplication factor that quantifies the relation between a m
...