1、BRITISH STANDARDBS EN 14801:2006Conditions for pressure classification of products for water and wastewater pipelinesThe European Standard EN 14801:2006 has the status of a British StandardICS 93.025; 93.030g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g
2、49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 14801:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2007 BSI 2007ISBN 978 0 580 50613 0National forewordThis Briti
3、sh Standard was published by BSI. It is the UK implementation of EN 14801:2006. The UK participation in its preparation was entrusted to Technical Committee B/505, Wastewater engineering, in liaison with Technical Committee B/504, Water supply.A list of organizations represented on this committee ca
4、n be obtained on request to its secretary.Additional informationWith some reluctance, the United Kingdom supported the proposal to publish EN 14801:2006 at CEN Formal Vote Stage. National annex NA describes the reasons for this concern and gives important information for the implementation of EN 148
5、01:2006 in the United Kingdom.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments issued since publicationAmd. No. Date C
6、ommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 14801July 2006ICS 93.025; 93.030English VersionConditions for pressure classification of products for water andwastewater pipelinesConditions de dtermination de la classe de pression desproduits pour rseaux dalimentation en eau oudassainisseme
7、ntBedingungen fr die Klassifizierung von Produkten frRohrleitungssysteme fr die Wasserversorgung undAbwasserentsorgung nach auftretenden DrckenThis European Standard was approved by CEN on 5 June 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the condi
8、tions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three off
9、icial versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Be
10、lgium, 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 STANDARDIZ
11、ATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14801:2006: EEN 14801:2006 (E) 2 Contents Page Foreword3 Int
12、roduction .4 1 Scope 5 2 Normative references 5 3 Terms and definitions .5 4 Symbols and abbreviations 6 5 Conditions 7 5.1 General7 5.2 Constant parameters.7 5.2.1 General7 5.2.2 Design life.7 5.2.3 Temperature .7 5.2.4 Negative pressure7 5.2.5 Unit weight of soil7 5.2.6 Native soil.7 5.3 Variable
13、parameters 8 5.3.1 General8 5.3.2 Loading parameters 8 5.3.3 Installation parameters .9 5.4 Combined conditions . 10 6 Determination of allowable pressures PFA, PMA, PEA 11 6.1 General. 11 6.2 Allowable pressures. 11 6.2.1 Allowable operating pressure . 11 6.2.2 Allowable maximum operating pressure
14、. 13 6.2.3 Allowable site test pressure 13 6.3 Methods for the determination of allowable pressures 13 6.4 Procedure for the determination of allowable pressures. 13 Annex A (informative) Considerations regarding longitudinal effects. 15 A.1 Longitudinal effects 15 A.1.1 General. 15 A.1.2 Failure be
15、haviour due to longitudinal effects 15 A.1.3 Failure modes 15 A.1.4 Longitudinal effects 16 Annex B (normative) Uniform classification of soils 20 Annex C (informative) Application example 23 construction procedures . 24 Annex E (informative) Information regarding bedding reaction angle . 25 Bibliog
16、raphy. 26 National annex NA Annex D (informative) Information on the relationship between type of compaction and (informative) Implementing the pressure classifications27EN 14801:2006 (E) 3 Foreword This document (EN 14801:2006) has been prepared by Technical Committee CEN/TC 165 “Waste water engine
17、ering”, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by January 2007, and conflicting national standards shall be withdrawn at the latest by January 2007.
18、According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Li
19、thuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 14801:2006 (E) 4 Introduction This document is intended to be used with EN 805 and European Product Standards for water supply and waste water components
20、containing pressure classification, to ensure that the pressure classification specified in such European Product Standards will be related to the allowable pressures (i.e. PFA, PMA, PEA) as defined in EN 805. The conditions mentioned in this document are considered to be the basics; product standar
21、ds may specify additional conditions. EN 14801:2006 (E) 5 1 Scope This document applies to components (pipes, joints, fittings, ferrules and valves), which have pressure related classification in European Standards covering products which are intended to be used for buried water supply and waste wat
22、er pressure pipelines outside buildings. It specifies combinations of loading conditions and installation conditions to be used in the design method by reference to the relevant product standard for the determination of the allowable pressures (PFA, PMA and PEA) as defined in EN 805. This document d
23、oes not apply as an installation guide. NOTE 1 This document does not give the full range of installation and loading parameters for all components and does not specify calculation and/or test methods for determination of the allowable pressures. NOTE 2 This document does not relieve designers of th
24、eir obligation under EN 805:2000, 8.4; e.g. to consider all conditions not addressed in clause 5 (e. g. seismic loads). NOTE 3 This document does not deal with marking of components. 2 Normative references The following referenced documents are indispensable for the application of this document. For
25、 dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 805:2000, Water supply Requirements for systems and components outside buildings ENV 1046:2001, Plastics piping and ducting systems - System
26、s outside building structures for the conveyance of water or sewage - Practices for installation above and below ground 3 Terms and definitions For the purposes of this document, the terms and definitions regarding component related pressures in EN 805:2000 apply, and are repeated here for convenien
27、ce. 3.1 allowable operating pressure PFA maximum hydrostatic pressure that a component is capable of withstanding continuously in service EN 805:2000 3.2 allowable maximum operating pressure PMA maximum pressure occurring from time to time, including surge, that a component is capable of withstandin
28、g in service EN 805:2000 3.3 allowable site test pressure PEA maximum hydrostatic pressure that a newly installed component is capable of withstanding for a relatively short duration, in order to ensure the integrity and tightness of the pipeline EN 805:2000 EN 14801:2006 (E) 6 4 Symbols and abbrevi
29、ations For convenience, Table 1 of EN 805:2000 is repeated here: Table 1 Designations of pressures in English, French, German EN 805:2000 Abbreviationa English French German related to DP Design pressure Pression de calcul en rgime permanent Systembetriebsdruck MDP Maximum design pressure Pression m
30、aximale de calcul Hchster Systembetriebsdruck STP System test pressure Pression dpreuve du rseau Systemprfdruck System related PFA Allowable operating pressure Pression de fonctionnement admissible Zulssiger Bauteilbetriebsdruck PMA Allowable maximum operating pressure Pression maximale admissible H
31、chster zulssiger Bauteilbetriebsdruck PEA Allowable site test pressure Pression dpreuve admissible sur chantierZulssiger Bauteilprfdruck auf der Baustelle Component related OP Operating pressure Pression de fonctionnement Betriebsdruck SP Service pressure Pression de service Versorgungsdruck System
32、related aValid for all language versions This document uses installation terms based on EN 805, these are illustrated in Figure 1. Trench Embankment Key 1 Backfill 2 Bedding 3 Upper bedding 4 Lower bedding 5 Embedment Figure 1 Installation terms used in pipe laying in trenches and under embankments
33、EN 14801:2006 (E) 7 5 Conditions 5.1 General Conditions for determination of allowable pressures (see clause 6) are differentiated in: constant parameters (see 5.2); variable parameters (see 5.3). Fittings, ferrules and valves may have different loading parameters from the pipe to take into consider
34、ation, when determining the allowable pressures. 5.2 Constant parameters 5.2.1 General For the purposes of this document the parameters given in Table 2 are considered to be constant for all combined conditions (see 5.4). 5.2.2 Design life The design life of the components shall be at least 50 years
35、, as specified in EN 805. This shall also be assumed for the determination of the allowable pressures (see clause 6). If applicable, Product Standards shall give re-rating factors or procedures for re-rating the allowable pressures of the components for other design lives. 5.2.3 Temperature The cont
36、inuous operating temperature for the determination of the allowable pressures shall be assumed 20 C. If applicable, Product Standards shall specify re-rating factors or procedures for re-rating for other temperatures. 5.2.4 Negative pressure Components shall be designed to withstand, when installed,
37、 transient pressure of 80 kPa below atmospheric (see EN 805). 5.2.5 Unit weight of soil The unit weight for native soil, embedment and backfill shall be assumed constant at 20 kN/m3for all determinations. 5.2.6 Native soil The type of native soil and its Relative Standard Proctor Density, DPr, shall
38、 be assumed constant for all determinations (see clause 6). EN 14801:2006 (E) 8 Table 2 Constant parameters Parameter Constant Design life 50 years Continuous operating temperature 20 C Negative pressure (transient, below atmospheric) 80 kPa Unit weight of soil (native soil, embedment, backfill) 20
39、kN/m3Native soil type “Gs” a 4 Relative Standard Proctor Density of native soil (DPr) b 100 % aClassification of soil types, see Annex B. bIf appropriate, equivalent values of Modified Proctor Density may be used. 5.3 Variable parameters 5.3.1 General The variable parameters are the combination of s
40、everal parameters, resulting from loading (see 5.3.2, e.g. soil loads, traffic loads, ground water loads) and installation (see 5.3.3, e.g. bedding, embedment, backfill). For loading conditions A, B and C1, C2 (see 5.3.2 and Table 4), due to requirement of road owners/authorities, the compaction is
41、always carried out directly against the trench wall with the sheeting, if used, being progressively withdrawn. Therefore sheeting removal does not affect the variable parameters. For loading condition C3 (see Table 4), an embankment condition with no sheeting is specified. 5.3.2 Loading parameters T
42、he loading parameters of the loading conditions A, B and C given in Table 4 are: condition: trench/embankment compaction of backfill depth of cover (not less than 0,7m) traffic load width of trench ground water table. In Table 4, the figures given for the loading parameters, derived from traffic loa
43、ds, are differentiated for the loading conditions A, B and C. Loading condition A is dominated by traffic load of a Main road under shallow depth of cover, i. e. covering the condition during road construction; the traffic load in Table 4 is expressed as the resulting additional soil pressure at pip
44、e crown1); in order to allow the assessment of the influence from good and moderate embedment 1)The additional pressure, derived from traffic loads at the surface level, takes into account the method of Boussinesq and the influence of impact according to EN 1295-1:1997, 5.2. In accordance with the m
45、ethod adopted by the European Product Standard for the determination of the allowable pressures, the pipe/soil interaction should be considered as specified in EN 1295-1:1997, 5.2.EN 14801:2006 (E) 9 quality, the loading condition A is combined with the installation conditions 1 and 2 respectively,
46、resulting in the combined conditions A1 and A2. Loading condition B is dominated by traffic load of an Urban road under shallow depth of cover, i. e. covering the condition during road construction; the traffic load given in Table 4 is expressed as the resulting additional soil pressure at pipe crow
47、n1); in order to allow the assessment of the influence from good and moderate embedment quality, the loading condition B is combined with the installation conditions 1 and 2 respectively, resulting in the combined conditions B1 and B2. Loading condition C is dominated by earth load; traffic load in
48、a Rural area, due to high depth of cover, is of minor influence; the traffic load given in Table 4 is expressed as the resulting additional soil pressure at pipe crown; in order to allow the assessment of the influence from good, moderate and poor embedment quality, the loading condition C is combin
49、ed with the installation conditions 1, 2 and 3 respectively, resulting in the combined conditions C1, C2 and C3. The figures given in Table 4 regarding the degree of the compaction of the main backfill are due to the average requirements of road owners/authorities in Europe (main roads, urban roads, rural areas). For guidance on longitudinal effects see Annex A (informative). NOTE 1 PFA etc. does not incorporate longitudinal effects. The results of longitudinal effects cannot always be corrected by altering the allowable pre
