BS EN 14505-2005 Cathodic protection of complex structures《复杂构造的阴极保护》.pdf
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1、BRITISH STANDARD BS EN 14505:2005 Cathodic protection of complex structures The European Standard EN 14505:2005 has the status of a British Standard ICS 77.060 BS EN 14505:2005 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 19 May 2005 BSI 1
2、9 May 2005 ISBN 0 580 46033 9 National foreword This British Standard is the official English language version of EN 14505:2005. Reference should also be made to BS 7361, Code of practice for land and marine applications, which will eventually be withdrawn when all the CEN standards relating to cath
3、odic protection currently being prepared, are published. The UK participation in its preparation was entrusted to Technical Committee GEL/603, Cathodic protection, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cros
4、s-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of
5、British Standards Online. 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 does not of itself confer immunity from legal obligations. aid enquirers to understand the text; pr
6、esent to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, a
7、n inside front cover, the EN title page, pages 2 to 24, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN1
8、4505 April2005 ICS77.060 Englishversion Cathodicprotectionofcomplexstructures Protectioncathodiquedesstructurescomplexes KathodischerKorrosionsschutzkomplexerAnlagen ThisEuropeanStandardwasapprovedbyCENon15March2005. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatethecon
9、ditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German)
10、.Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hu
11、ngary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 20
12、05CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN14505:2005:EEN 14505:2005 (E) 2 Contents Page Foreword 3 1 Scope .4 2 Normative references .4 3 Terms and definitions.4 4 Criteria for the cathodic protection of complex structures .4 5 Prerequisites
13、 for the application of cathodic protection to a complex structure 5 6 Base data for design.6 7 Design and prerequisites .7 8 Installation of cathodic protection systems10 9 Commissioning .11 10 Inspection and maintenance12 Annex A (informative) Principle scheme of a complex structure .14 Annex B (i
14、nformative) Example of an industrial complex structure.15 Annex C (informative) Reinforced concrete data in complex structures .16 Annex D (informative) Increasing soil potential .17 Annex E (informative) Groundbed data 21 Bibliography.24 EN 14505:2005 (E) 3 Foreword This European Standard (EN 14505
15、:2005) has been prepared by Technical Committee CEN/TC 219 “Cathodic protection”, the secretariat of which is held by BSI. 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 October 2005, and conflic
16、ting national standards shall be withdrawn at the latest by October 2005. It may be difficult to obtain complete cathodic protection of certain structures when following the general guidelines in EN 12954. This may be due to an electrical connection to one or more metal structures (electrodes) situa
17、ted in the same electrolyte as the structure, which is to be protected. In particular, the structure may be earthed in order to mitigate electrical hazards or the connection to the other structures may be dictated by construction or operational requirements. An electrical connection to a foreign str
18、ucture can result in a significantly increased cathodic protection current demand, since the current flows not only to the structure to be protected but also to the foreign structure. This unwanted increased current demand is enhanced when the foreign structure consists of a metal, which is more nob
19、le (having a more positive resting potential) than the metal in the structure to be protected. Connection to a copper earthing electrode or to the steel reinforcement in a concrete structure are examples of the latter. These difficulties can mean that a significantly increased cathodic protection cu
20、rrent is required because of structures electrically connected to the structure to be protected, resulting in inadequate cathodic protection, current distribution and shielding effects. For this reason, the term “complex structure” has been used. It does not refer to the complexity of the structure
21、or to the complexity of the cathodic protection system. In such conditions the prerequisites, the criteria and the methods described in the present document expand those given in EN 12954. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countr
22、ies 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, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerla
23、nd and United Kingdom. EN 14505:2005 (E) 4 1 Scope This European Standard applies to the cathodic protection of complex structures. It is applicable to structures, which are to be cathodically protected, but cannot be electrically isolated, whether for technical or safety reasons, from foreign metal
24、lic structures situated in the same electrolyte as the structure to be protected. Such a structure is referred to as a “complex structure”. This European Standard is not applicable to structures that can be protected in accordance with EN 12954. When contacts with foreign structures or defective iso
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