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1、BRITISH STANDARD BS EN 13480-6:2004 Incorporating Amendment No. 1 Metallic industrial piping Part 6: Additional requirements for buried piping The European Standard EN 13480-6:2004, with the incorporation of amendment A1:2005, has the status of a British Standard ICS 23.040.01 ? BS EN 13480-6:2004 T
2、his British Standard was published under the authority of the Standards Policy and Strategy Committee on 21 July 2004 BSI 2006 ISBN 0 580 44128 8 National foreword This British Standard is the official English language version of EN 13480-6:2004, including amendment A1:2005. The start and finish of
3、text introduced or altered by amendment is indicated in the text by tags !“. Tags indicating changes to CEN text carry the number of the CEN amendment. For example, text altered by CEN amendment A1 is indicated in the text by !“. The UK participation in its preparation was entrusted to Technical Com
4、mittee PVE/10, Piping systems, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found i
5、n the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsi
6、ble for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK i
7、nterests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 34, an inside back cover and a back cover. The BSI copyright notice displayed in this
8、 document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments 1627431 May 2006See national foreword EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 13480-6 July 2004 ICS 23.040.01 English version Metallic industrial piping - Part 6: Additional
9、requirements for buried piping Tuyauteries industrielles mtalliques - Partie 6: Exigences complmentaires relatives aux tuyauteries enterres Metallische industrielle Rohrleitungen - Teil 6: Zustzliche Anforderungen fr erdgedeckte Rohrleitungen This European Standard was approved by CEN on 16 April 20
10、04; amendment A1:2005 was approved by CEN on 22 September 2005. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical re
11、ferences concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member
12、 into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithua
13、nia, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2004 CENAll ri
14、ghts of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13480-6:2004 + A1:2005 E +A1 December 2005 (includes amendment A1:2005) (inclut lamendement A1:2005)(enthlt nderung A1:2005) EN 13480-6:2004 (E) 2 Contents page Foreword3 1 Scope 4 2 Normative
15、references4 3 General4 3.1 Safety4 3.2 Routes.5 3.3 Depth of installation 5 3.4 Pipes marking and recording.5 3.5 Internal inspection provisions5 3.6 Contents removal.5 3.7 Trench drainage.5 4 Materials .6 5 Design and calculation6 5.1 Minimum wall thickness for buried piping6 5.2 Design.6 6 Install
16、ation7 6.1 Trenches.7 6.2 Pipe laying8 6.3 Back filling8 7 Sleeves or casings.8 8 Corrosion protection.8 8.1 General8 8.2 Coatings9 8.3 Cathodic protection.9 9 Examination and testing .9 Bibliography34 Annex A (normative) Calculations for buried piping10 Annex ZA (informative) Relationship between t
17、his European Standard and the Essential Requirements of EU Directive 97/23/EC 33 w w w . b z f x w . c o m EN 13480-6:2004 (E) 3 Foreword This document (EN 13480-6:2004) has been prepared by Technical Committee CEN/TC 267 “Industrial piping and pipelines”, the secretariat of which is held by AFNOR.
18、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 2005, and conflicting national standards shall be withdrawn at the latest by January 2005. This document has been prepared under a mandate g
19、iven to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this document. This European Standard EN 13480 for metallic industrial
20、 piping consists of seven interdependent and not dissociable parts which are: Part 1: General; Part 2: Materials; Part 3: Design and calculation; Part 4: Fabrication and installation; Part 5: Inspection and testing; Part 6: Additional requirements for buried piping; CEN/TR 13480-7: Guidance on the u
21、se of conformity assessment procedures. 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, Hung
22、ary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Foreword to amendment A1 This European Standard (EN 13480-6:2004/A1:2005) has been prepared by Technical Committee CEN/TC 267
23、“Industrial piping and pipelines”, the secretariat of which is held by AFNOR. the latest by June 2006. This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For
24、 relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this European Standard. This European Standard contains the Annex A (normative) to be added in EN 13480-6:2004, and the Annex ZA updated to replace the current Annex ZA in EN 13480-6:2004. According to the CEN
25、/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, Lithuania, Luxembourg,
26、 Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. 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 June 2006, and conflicting nationa
27、l standards shall be withdrawn at w w w . b z f x w . c o m EN 13480-6:2004 (E) 4 1 Scope This document specifies requirements for industrial piping either totally buried or partly buried and partly run in sleeves or similar protection. It is used in conjunction with the other six parts of EN 13480.
28、 Where buried piping subject to this standard connects to piping installed under other jurisdiction such as pipelines, the transition should be made at a closing element e.g. an isolating or regulating valve separating the two sections. This should be close to the boundary of the industrial site, bu
29、t may be inside or outside the boundary. Operating temperature up to 75 C. NOTE For higher temperatures reference should be made to EN 13941, but it should be kept in mind, that CEN/TC 107 only deals with pre-insulated piping with temperatures up to 140 C and diameters up to 800 mm, which is state o
30、f the art for these products. 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) appli
31、es. EN 13480-1, Metallic industrial piping Part 1: General. EN 13480-2:2002, Metallic industrial piping Part 2: Materials. EN 13480-3, Metallic industrial piping Part 3: Design and calculation. EN 13480-5, Metallic industrial piping Part 5: Inspection and testing. 3 General 3.1 Safety a) Buried pipi
32、ng within an industrial site presents a potential hazard to site personal, equipment and environment. The sections set out in this document provide guidance as to how the hazard presented by the piping may be assessed, and the integrity of the piping system maintained. NOTE 1 Attention is drawn to a
33、ppropriate National or Local regulations. b) The main factors to be considered are: Design including Routing, Layout, Interaction with connecting systems; Materials and Construction Specification and Quality Control; Operating Procedures and Control; Corrosion protection; External Impact Protection
34、and Mitigation. All of these factors interact. w w w . b z f x w . c o m EN 13480-6:2004 (E) 5 NOTE 2 It is recommended that all buried piping be subjected to a formal hazard analysis procedure. NOTE 3 Attention is drawn to appropriate National or Local regulations. c) Additional safety requirements
35、 may be specified for group 1 fluids according to EN 13480-1, including automated means of isolating buried sections of piping. 3.2 Routes All routes for buried piping shall be agreed with the owner and operator of the site. The site owner shall be required to furnish details of all other actual or
36、planned buried services (including cables) and all roadways or other surface loads within the construction working width or zone of the proposed pipe. Piping in class III according to EN 13480-1 shall be separated from any other pipe or service by a minimum distance of 0,25 m unless it can be demons
37、trated that a smaller distance is acceptable. 3.3 Depth of installation In the absence of special protection (e.g. concrete slabs) buried piping shall be provided with a minimum cover of 0,8 m. The designer shall consider increasing the extent of cover above the minimum where penetrating cold or fro
38、st heave of the ground is likely, or where damage from excavation activities is a possibility. 3.4 Pipes marking and recording Buried pipes shall be marked by a continuous tape or other agreed means placed directly above the pipe and no closer than 0,3 m. All buried pipes shall be identified on as-i
39、nstalled drawings which accurately locate the route relative to structures or other permanent features. The site owner may require the route to be physically marked by the use of identification posts or cover slabs at appropriate intervals. 3.5 Internal inspection provisions Where periodic internal
40、inspection of buried piping is anticipated, and the specification identifies the method proposed, the designer shall incorporate appropriate means of introducing and removing the inspection devices. Such closures, and openings for inspection shall be designed in accordance with EN 13480-3. 3.6 Conte
41、nts removal The design of the piping system shall make allowance for the safe filling and removal of the contents. This shall include vent and drain points or falls as required, and the selection of appropriate bends and fittings. 3.7 Trench drainage The designer shall recognize that pipe trenches f
42、or buried piping can act as channels for ground water. Appropriate means shall be employed to ensure that the bottom of the trench has sufficient slope to soak-aways or sumps to prevent accumulation of water around the piping. Where such measures are not possible, the designer shall include the poss
43、ibility of flotation in the design calculations. In addition, the drainage arrangements shall dispose of the hydrostatic test water. Care shall be exercised during this operation to ensure that washout of bedding material does not occur. w w w . b z f x w . c o m EN 13480-6:2004 (E) 6 4 Materials Ma
44、terials shall conform to the requirements of EN 13480-2 except that the value for the specified minimum elongation after fracture for the longitudinal direction (see EN 13480-2:2002, 4.1.4.) shall be 20 %. Materials with elongation values less than 20 % shall be avoided, and shall only be used subje
45、ct to agreement between the purchaser and the designer. 5 Design and calculation 5.1 Minimum wall thickness for buried piping Unless the pressure design calculations lead to a greater thickness, the wall thickness of the pipe shall not be lower than the value given in Table 1. Table 1 Minimum wall t
46、hickness for buried piping Nominal size (DN) Minimum thickness mm DN 80 3,2 80 0 12 2 2 += + tassr o eo e eCqk D Hk D Hk (A.3.2.5.1-2) Ctass Ht: virtual plane of equal settlement Ctass 0 t o o t e H D k C D Hk 2 1 2 2 + = + (A.3.2.5.2-2) Ctass 0 + + + + = o e o e e e t e t o D Hk D Hk H H H D k C 2
47、2 2 1 2 1 (A.3.2.5.2-4) Ctass L. ! “ EN 13480-6:2004 (E) 33 Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 97/23/EC This European Standard has been prepared under a mandate given to CEN by the European Commission to provide a means o
48、f conforming to Essential Requirements of the New Approach Directive 97/23/EC. Once this European Standard is cited in the Official Journal of the European Communities under that Directive and has been implemented as a national standard in at least one Member State, compliance with the clauses of th
49、is European Standard given in Table ZA.1 confers, within the limits of the scope of this European Standard, a presumption of conformity with the corresponding Essential Requirements of that Directive and associated EFTA regulations. Table ZA.1 Correspondence between this European Standard and Directive 97/23/EC Clause(s)/sub- clause(s) of t