CEN/TS 15223:2008
(Main)Plastics piping systems - Validated design parameters of buried thermoplastics piping systems
Plastics piping systems - Validated design parameters of buried thermoplastics piping systems
This document covers thermoplastics pipe material related properties and design topics to be taken into account when carrying out any static pipe calculation. It also provides guidance to applying structural design of thermoplastics piping systems for pressure and non-pressure applications. It furthermore provides documentation based on long term experience, to be used in justifying and/or verification of any structural design method.
NOTE For piping systems for the conveyance of gaseous fluids additional guidance is given in EN 12007-2.
Kunststoff-Rohrleitungssysteme - Gültige Berechnungsparameter von erdverlegten thermoplastischen Rohrleitungssystemen
Dieses Dokument behandelt Eigenschaften von thermoplastischen Rohrwerkstoffen und Berechnungsaspekte,
die bei der Durchführung von statischen Berechnungen der Rohrleitung zu berücksichtigen sind. Es
enthält ebenfalls Empfehlungen für die Anwendung der statischen Berechnungen von thermoplastischen
Rohrleitungssystemen für Anwendungen unter und ohne Druck. Darüber hinaus bietet es eine auf Langzeit-
Erfahrungen beruhende Dokumentation zur Verwendung bei der Rechtfertigung und/oder Verifizierung eines
beliebigen statischen Berechnungsverfahrens.
ANMERKUNG Für Rohrleitungssysteme zum Transport gasförmiger Fluide werden zusätzliche Empfehlungen in
EN 12007-2 gegeben.
Systèmes de canalisations en matières plastiques - Paramètres de calcul validés pour les systèmes enterrés de canalisations en matières thermoplastiques
Le présent document couvre les propriétés liées aux matières des tubes en thermoplastiques ainsi que les points à prendre en compte dans tout calcul de tube à l’état statique. Il fournit également un guide pour appliquer les calculs de résistance mécanique des systèmes de canalisations en thermoplastiques aux applications avec ou sans pression. Il fournit, en outre, la documentation, établie sur une expérience à long terme, nécessaire pour justifier et/ou vérifier toute méthode de calcul de la résistance mécanique.
NOTE Pour les systèmes de canalisations destinés à la distribution de combustibles gazeux, des lignes directrices complémentaires sont données dans l’EN 12007-2.
Cevni sistemi iz polimernih materialov - Veljavni parametri za načrtovanje plastomernih cevnih sistemov, položenih v zemljo
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-junij-2008
&HYQLVLVWHPLL]SROLPHUQLKPDWHULDORY9HOMDYQLSDUDPHWUL]DQDþUWRYDQMH
SODVWRPHUQLKFHYQLKVLVWHPRYSRORåHQLKY]HPOMR
Plastics piping systems - Validated design parameters of buried thermoplastics piping
systems
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 15223:2008
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.
TECHNICAL SPECIFICATION
CEN/TS 15223
SPÉCIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION
April 2008
ICS 23.040.01
English Version
Plastics piping systems - Validated design parameters of buried
thermoplastics piping systems
Systèmes de canalisations en matières plastiques - Kunststoff-Rohrleitungssysteme - Gültige
Paramètres de calcul validés pour les systèmes enterrés Berechnungsparameter von erdverlegten
de canalisations en matières thermoplastiques thermoplastischen Rohrleitungssystemen
This Technical Specification (CEN/TS) was approved by CEN on 25 September 2007 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, 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.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TS 15223:2008: E
worldwide for CEN national Members.
Contents
Page
Foreword.3
Introduction.4
1 Scope .5
2 Normative references .5
3 Terms, definitions, symbols and abbreviations .5
3.1 Terms and definitions.5
3.2 Symbols .6
3.3 Abbreviations .7
4 General material properties .8
4.1 General material properties .8
4.2 Pressure pipes (stress design basis).9
4.3 Non-pressure pipes (strain design based).10
4.4 Piping systems for gaseous fluids .10
5 System and operation related aspects .10
5.1 General .10
5.2 Tightness.11
5.3 Flow capacity .11
5.4 Temperature .13
5.5 Design procedure of pressure pipes.14
5.6 Water hammer (pressure pipes) .14
5.7 Deflection .16
6 Design approach.16
6.1 Design approach based on experience .16
6.2 Longitudinal effects.19
6.3 Joints.20
7 Guidance for verification of installation .22
8 Commissioning .23
8.1 Non pressure pipe.23
8.2 Pressure pipe.23
Annex A (informative) Time dependency of stress and strain in buried flexible piping systems .24
Annex B (informative) Soil / pipe behaviour.25
Annex C (informative) Soil and installation parameters .27
Bibliography.28
Foreword
This document (CEN/TS 15223:2008) has been prepared by Technical Committee CEN/TC 155 “Plastics
piping systems and ducting systems”, the secretariat of which is held by NEN.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to announce this CEN Technical Specification: Austria, Belgium, Bulgaria, 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.
Introduction
In Europe several design methods exist and some are still under development. The plastics pipes industry has
carried out a lot of research with full-scale trials. From these research graphs have been made that shows the
deflection in the pipes immediately after installation. Also the so-called settlement period is measured. This
settlement will always take place. In case that heavy traffic is present, the final deflection will be reached
faster.
It is strongly advised to check any calculated deflection with the values in the two design graphs.
The information compiled is meant to be used by designers. The values given are meant for general guidance.
For the purpose of design using simple methods, two soil groups are used, granular and cohesive. For more
detailed and sophisticated design, more soil groups are used, for which reason reference is made to
[11]
EN 1295-1 and to national methods.
1 Scope
This document covers thermoplastics pipe material related properties and design topics to be taken into
account when carrying out any static pipe calculation. It also provides guidance to applying structural design
of thermoplastics piping systems for pressure and non-pressure applications. It furthermore provides
documentation based on long term experience, to be used in justifying and/or verification of any structural
design method.
NOTE For piping systems for the conveyance of gaseous fluids additional guidance is given in EN 12007-2.
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 476, General requirements for components used in discharge pipes, drains and sewers for gravity
systems
EN 773:1999, General requirements for components used in hydraulically pressurized discharge pipes,
drains and sewers
EN 805:2000, Water supply — Requirements for systems and components outside buildings
CEN/TR 1295-2, Structural design of buried pipelines under various conditions of loading — Part 2: Summary
of nationally established methods of design
CEN/TR 1295-3, Structural design of buried pipelines under various conditions of loading — Part 3: Common
method
EN 1446, Plastics piping and ducting systems — Thermoplastics pipes — Determination of ring flexibility
EN 12007-2, Gas supply systems — Gas pipelines for maximum operating pressure up to and including
16 bar — Part 2: Specific functional recommendations for polyethylene (MOP up to and including 10 bar)
EN ISO 9080, Plastics piping and ducting systems — Determination of the long-term hydrostatic strength of
thermoplastics materials in pipe form by extrapolation (ISO 9080:2003)
EN ISO 12162, Thermoplastics materials for pipes and fittings for pressure applications — Classification and
designation — Overall service (design) coefficient (ISO 12162:1995)
3 Terms, definitions, symbols and abbreviations
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1.1
constant load
load on a pipe, e.g. from internal pressure, that is not changing with time
3.1.2
constant deformation
deformation due to deflection of the pipe that is not changing with time, e.g. due to constraint from the soil
3.1.3
design stress
σ
s
allowable stress, in megapascals, for a given application. It is derived from the MRS by dividing it by the
overall service coefficient C
3.1.4
minimum required strength
MRS
value of σ , rounded down to the next smaller value of the R10 series or of the R20 series depending on the
LPL
value of σ
LPL
NOTE R10 and R20 series are the Renard number series according to ISO 3 [1] and ISO 497 [2].
3.1.5
overall service coefficient
C
overall service coefficient with a value greater that one, which takes into consideration service conditions as
well as properties of the components of a piping system others than those represented in the lower confidence
limit
3.1.6
nominal pressure
PN
numerical designation used for reference purposes related to the mechanical characteristics of the component
of a piping system. It corresponds to the maximum continuous operating pressure in bars
3.1.6
pipe stiffness
S
p
theoretical pipe stiffness determined with the Young’s modulus and the Poisson ratio
3.1.7
critical buckling pressure
q
crit
critical internal pressure causing buckling of the pipe
3.1.8
nominal stiffness
SN
numerical designation of the ring stiffness of a pipe or fitting, which is a convenient round number indicating
the minimum required ring stiffness of the pipe or fitting
NOTE It is designated by the letters “SN” followed by the appropriate number.
3.2 Symbols
For the purposes of this document, the following symbols apply.
C overall service coefficient
ß deflection correction factor
C 100 year overall service coefficient
C 50 year overall service coefficient
C deflection factor, in percent
f
d nominal outside diameter of the pipe, in millimetres
n
δ deflection of the pipe, in millimetres
d mean outside diameter of the pipe, in millimetres
em
d the midwall diameter, in millimetres
m
d outside diameter of the pipe, in millimetres
e
e wall thickness of the pipe, in millimetres
ε strain
E the Young’s modulus of the pipe material, in megapascals
p
E tangent modulus, in kilopascals
t
f application rating factor
a
F maximum tensile force, in newton
fitting
f temperature rating factor
τ
g gravity, in m/s
K value of the measured molecular weight
k absolute roughness, in millimetres
k viscosity of water, in m /s
water
ν poisson ratio
q critical buckling pressure, in kilopascals
crit
ρ density, in kilograms per cubic meter
R bending radius of the pipe, in millimetres
R maximum bending radius of the pipe, in millimetres
max
ρ density of water
S geometrical pipe characteristic defined as: S = (d − e)/(2e)
n
2 −1
S pipe stiffness value determined by (1 − υ ) /E ⋅(d /e
...
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