CEN TS 15223-2017 Plastics piping systems - Validated design parameters of buried thermoplastics piping systems.pdf

1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Plastics piping systems - Validated design parameters of buried thermoplastics piping systemsPD CEN/TS 15223:2017National forewordThis Published Document is the UK implementation of CEN/TS 15223:2017.The UK participatio

2、n in its preparation was entrusted to Technical Committee PRI/88, Plastics piping systems.A number of errors and omissions have been detected in this document. Until these can be addressed by CEN/TC 155, the following clarifications have been provided by BSI committee PRI/88, Plastics piping systems

3、, for the guidance of readers.Clause 3.1.6: qcritshould refer to the critical external pressure causing buckling of the pipe.Figure 1: The middle box on the right-hand side of the flow chart should state Use calculation for structural design rather than Use practical for structural design.Clause 5.3

4、: It is the view of the UK committee that the cited Reference 4 is not the source of the statements on strain limits in this subclause. Readers are guided to reference 17, which together with the subsequent book by the same author, listed below as additional reference 20, makes clear that the cited

5、conclusion from research studies that for all practical purposes these thermoplastics materials are not strain limited applies only to solid wall pipes. For structured wall plastics pipes, the strain limits specified in Table 3 can prove critical in structural design.The statement in the second para

6、graph that “Passing this EN ISO 13968 ring flexibility test ensures stability against buckling.” should refer to local buckling stability of structured wall pipes only.Clause 5.6: It is the view of the UK committee that the cited Reference 9 is not the source of Formula (1) and Formula (2). Readers

7、are guided to additional Reference 20, which advises that Formula (1) is amended in the case of soft soils, with the long-term ring stiffness SLof the pipe replacing the short-term ring stiffness expressed by SN. For clarification, Etrefers to the soil tangent modulus.Clause 5.6, EXAMPLE: Readers ar

8、e guided to additional Reference 20, which for deep burial with sustained groundwater head advises the use of an amended Formula (1), with the long-term ring stiffness SLof the pipe replacing the short-term ring stiffness expressed by SN.Clause 6.7.1: The second paragraph of Clause 6.7.1 should rela

9、te to the free creeping design condition for positive internal pressure resistance described in Clause 6.7.2.Clause 6.10: The UK committee draws attention to the need to consider the additional longitudinal stresses and strains arising from any internal pressurization, due to the Poisson effect and/

10、or any unrestrained changes in pipe alignment. These can particularly impact the design or selection of suitable joints and connection fittings.The following additional reference, cited above, provides essential background to the document:20 Janson, L.E. (1999). Plastics pipes for water supply and s

11、ewage disposal. 3rd ed. Stockholm: Borealis.PUBLISHED DOCUMENTPD CEN/TS 15223:2017Readers are also referred to BS 9295:2010 Guide to the structural design of buried pipelines, which is currently being revised and updated to reflect the current state of the art of design of buried thermoplastics pipe

12、s of both solid and structured wall profile.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standa

13、rds Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 87507 6ICS 23.040.01Compliance with a British Standard cannot confer immunity from legal obligations.This Published Document was published under the authority of the Standards Policy and Strategy Committee on 31 May 2018.Amen

14、dments/corrigenda issued since publicationDate Text affectedPUBLISHED DOCUMENT PD CEN/TS 15223:2017TECHNICAL SPECIFICATION SPCIFICATION TECHNIQUE TECHNISCHE SPEZIFIKATION CEN/TS 15223 November 2017 ICS 23.040.01 Supersedes CEN/TS 15223:2008English Version Plastics piping systems - Validated design p

15、arameters of buried thermoplastics piping systems Systmes de canalisations en matires plastiques - Paramtres de calcul valids pour les systmes enterrs de canalisations en matires thermoplastiques Kunststoff-Rohrleitungssysteme - Besttigte Berechnungsparameter von erdverlegten thermoplastischen Rohrl

16、eitungssystemen This Technical Specification (CEN/TS) was approved by CEN on 4 September 2017 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 que

17、stion 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 standa

18、rds 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 Ma

19、cedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALI

20、SATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. CEN/TS 15223:2017 ETECHNICAL SPECIFICATION SPCIFICATION TECHNIQUE TECHNISCHE S

21、PEZIFIKATION CEN/TS 15223 November 2017 ICS 23.040.01 Supersedes CEN/TS 15223:2008English Version Plastics piping systems - Validated design parameters of buried thermoplastics piping systems Systmes de canalisations en matires plastiques - Paramtres de calcul valids pour les systmes enterrs de cana

22、lisations en matires thermoplastiques Kunststoff-Rohrleitungssysteme - Besttigte Berechnungsparameter von erdverlegten thermoplastischen Rohrleitungssystemen This Technical Specification (CEN/TS) was approved by CEN on 4 September 2017 for provisional application. The period of validity of this CEN/

23、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 a

24、n 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 natio

25、nal 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, Serb

26、ia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CEN All rights of exploitation in any form and by

27、any means reserved worldwide for CEN national Members. Ref. No. CEN/TS 15223:2017 EPD CEN/TS 15223:2017CEN/TS 15223:2017 (E) 2 Contents Page European foreword . 4 Introduction 5 1 Scope 6 2 Normative references 6 3 Terms, definitions, symbols and abbreviations . 7 3.1 Terms and definitions . 7 3.2 S

28、ymbols . 8 3.3 Abbreviations . 9 4 Route for structural design 9 4.1 General 9 4.2 Structural design based on practical experience . 12 4.3 Structural design based on design calculations 13 5 Functional design non-pressure . 13 5.1 General . 13 5.2 Material 13 5.3 Strain 14 5.4 Flow capacity . 14 5.

29、5 Temperature 15 5.6 Ring buckling . 15 5.7 Longitudinal effects . 16 5.7.1 General . 16 5.7.2 Axial bending . 17 5.7.3 Allowable cold bending 17 6 Functional design pressure 17 6.1 General . 17 6.2 Material 17 6.3 Design coefficient . 18 6.4 Pressure rating PN . 18 6.5 Flow capacity . 18 6.6 Temper

30、ature 19 6.6.1 Temperature dependence of the nominal working pressure of PE piping systems 19 6.6.2 Temperature dependence of the nominal working pressure of PVC piping systems . 19 6.7 Working pressure 20 6.7.1 Buckling resistance for negative pressure applications 20 6.7.2 PFA, PMA and PEA 20 6.8

31、Water hammer 20 6.9 Ring buckling . 21 6.10 Longitudinal effects . 22 6.10.1 Axial bending . 22 6.10.2 Cold bending limits 22 6.11 Joints . 23 7 Structural design 23 7.1 General . 23 7.2 Behaviour of installed plastic pipes in soil . 24 PD CEN/TS 15223:2017CEN/TS 15223:2017 (E) 3 7.3 Structural desi

32、gn based on practical experience 25 7.3.1 General . 25 7.3.2 Values for installation phase 26 7.3.3 Values for final deflection 27 7.4 Structural design based on a design calculations . 28 8 Guidance for verification of installation 28 9 Commissioning 29 9.1 General . 29 9.2 Non pressure pipe 29 9.3

33、 Pressure pipe . 29 Annex A (informative) Time dependency of stress and strain in buried flexible piping systems . 30 Annex B (informative) Soil / pipe behaviour . 31 Annex C (informative) Verification against limit states for non-pressure pipes 33 Annex D (informative) Flow capacity charts (non-pre

34、ssure) 34 Bibliography . 36 PD CEN/TS 15223:2017CEN/TS 15223:2017 (E) 4 European foreword This document (CEN/TS 15223:2017) 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 possibilit

35、y 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 15223:2008. According to the CEN/CENELEC Internal Regulations, the national standards organisations of th

36、e 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, Ne

37、therlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. PD CEN/TS 15223:2017CEN/TS 15223:2017 (E) 5 Introduction In Europe, several design methods exist and some are still under development. The plastics pipes industry has

38、carried out a lot of research with full-scale trials. From these researches, graphs have been made that show the deflection in the pipes immediately after installation. In addition, the so-called settlement period is measured. This settlement will always take place. In case that heavy traffic is pre

39、sent, 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 me

40、thods, two compactible soil groups are used, granular and cohesive. If applicable, reference is made to EN 1295-1, EN 1610, CEN/TR 1046 and national practices. PD CEN/TS 15223:2017CEN/TS 15223:2017 (E) 6 1 Scope This Technical Specification covers validated design parameters of buried thermoplastics

41、 piping systems for functional and structural design for the following applications: pressure (excluding piping systems for gaseous fluids and industrial applications); non-pressure. The functional design is based on relevant standards and commonly used practices. Depending on the project parameters

42、, the route for structural design can be either established by long term experience (within certain limitations), or calculated according to CEN/TR 1295-2 8 by using thermoplastic pipe material related properties and design criteria. NOTE 1 The route for the structural design is shown in the flowcha

43、rt given in Figure 1 in 4.1. NOTE 2 Industrial applications also includes district heating Since in practice precise details of types of soil and installation conditions are not always available at the design stage, the choice of design assumptions is left to the judgement of the designer/specifier.

44、 In this connection, this guide can only provide general indications and advice. 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 undat

45、ed references, the latest edition of the referenced document (including any amendments) applies. EN 476, General requirements for components used in drains and sewers EN 805, Water supply - Requirements for systems and components outside buildings EN 1295-1, Structural design of buried pipelines und

46、er various conditions of loading - Part 1: General requirements EN 1610:2015, Construction and testing of drains and sewers CEN/TR 1046:2013, Thermoplastics piping and ducting systems - Systems outside building structures for the conveyance of water or sewage - Practices for underground installation

47、 EN ISO 9969, Thermoplastics pipes - Determination of ring stiffness (ISO 9969) EN ISO 12162, Thermoplastics materials for pipes and fittings for pressure applications - Classification, designation and design coefficient (ISO 12162) EN ISO 13968, Plastics piping and ducting systems - Thermoplastics

48、pipes - Determination of ring flexibility (ISO 13968) PD CEN/TS 15223:2017CEN/TS 15223:2017 (E) 7 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 deflection deviation of the circle cross sec

49、tion of the pipe Note 1 to entry: Deflection is expressed as percentage %. 3.1.2 minimum required strength MRS value of LPL at 20 C and 50 years, rounded down to the next lower value of the R10 series when LPLis below 10 MPa, or to the next lower value of the R20 series when LPL is 10 MPa or greater Note 1 to entry: R10 and R20 series are the Renard number series according to ISO 3 1 and ISO 497 2 3.1.3 lower confidence limit of the predicted hydrostatic strength LPLquantity, with the dimensions of stress, which repr