BS EN ISO 13174-2012 Cathodic protection of harbour installations《港口设施的阴极保护》.pdf

1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 13174:2012Cathodic protection of harbourinstallations (ISO 13174:2012)Copyright European Committee for Standardization Provided by IHS under license with CENNot for Res

2、aleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 13174:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO13174:2012. It supersedes BS EN 13174:2001 which is withdrawn.The UK participation in its preparation was entrusted to

3、 TechnicalCommittee GEL/603, Cathodic protection.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Stan

4、dards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 72891 4ICS 47.020.99; 77.060; 93.140Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31

5、 January 2013.Amendments issued since publicationDate Text affectedCopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 13174

6、December 2012 ICS 77.060; 47.020.99 Supersedes EN 13174:2001English Version Cathodic protection of harbour installations (ISO 13174:2012) Protection cathodique des installations portuaires (ISO 13174:2012) Kathodischer Korrosionsschutz fr Hafenbauten (ISO 13174:2012) This European Standard was appro

7、ved by CEN on 18 December 2012. 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 references concerning such nationa

8、l standards may be obtained on application to the CEN-CENELEC Management Centre 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 into its own language

9、 and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hu

10、ngary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Manage

11、ment Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 13174:2012: ECopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproducti

12、on or networking permitted without license from IHS-,-,-BS EN ISO 13174:2012EN ISO 13174:2012 (E) 3 Foreword This document (EN ISO 13174:2012) has been prepared by Technical Committee CEN/TC 219 “Cathodic protection“, the secretariat of which is held by BSI, in collaboration with Technical Committee

13、 ISO/TC 156 “Corrosion of metals and alloys“. 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 2013, and conflicting national standards shall be withdrawn at the latest by June 2013. Attention

14、 is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 13174:2001. According to the CEN/CENELEC Internal Regulations, the

15、national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

16、 Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted w

17、ithout license from IHS-,-,-BS EN ISO 13174:2012ISO 13174:2012(E) ISO 2012 All rights reserved iiiContents PageForeword ivIntroduction v1 Scope . 11.1 General . 11.2 Structures 11.3 Materials . 11.4 Environment . 11.5 Safety and environment protection 22 Normative references 23 Terms and definitions

18、 . 24 Competence of personnel 45 Design basis . 55.1 Objectives. 55.2 Cathodic protection criteria . 55.3 Design parameters . 65.4 Electrical current demand 75.5 Cathodic protection systems . 95.6 Electrical continuity 115.7 Interactions . 116 Impressed current systems 126.1 Objectives 126.2 Design

19、considerations 126.3 Equipment considerations . 137 Galvanic anode systems 167.1 Objectives167.2 Design 167.3 Materials 167.4 Location of anodes 177.5 Installation . 178 Commissioning, operation and maintenance 188.1 Objectives 188.2 Commissioning: galvanic systems . 188.3 Commissioning: Impressed c

20、urrent systems . 188.4 Operation and maintenance . 199 Documentation 209.1 Objectives 209.2 Impressed current system . 209.3 Galvanic anodes system 21Annex A (informative) Guidance for current requirements for cathodic protection of harbour installations 22Annex B (informative) Anode resistance, cur

21、rent and life determination 24Annex C (informative) Typical electrochemical characteristics of impressed current anodes .29Annex D (informative) Guidance related to the design process 30Bibliography .32Copyright European Committee for Standardization Provided by IHS under license with CENNot for Res

22、aleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 13174:2012ISO 13174:2012(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is n

23、ormally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part i

24、n the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.The main task of technical committees is to prepar

25、e International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.Attention is drawn to the possibility that some

26、 of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.ISO 13174 was prepared by the European Committee for Standardization (CEN) Technical Committee CEN/TC 219, Cathodic protection, in collaboration with

27、 Technical Committee ISO/TC 156, Corrosion of metals and alloys, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).ISO 13174 cancels and replaces EN 13174:2001, which has been technically revised.iv ISO 2012 All rights reservedCopyright European Committ

28、ee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 13174:2012ISO 13174:2012(E)IntroductionCathodic protection is applied, sometimes in conjunction with protective coatings, to protect the external

29、surfaces of steel harbour installations and appurtenances from corrosion due to seawater, brackish water, saline mud or soil fill.Cathodic protection works by supplying sufficient direct current to the immersed external surface of the structure to change the steel to electrolyte potential to values

30、where corrosion is insignificant.The general principles of cathodic protection in seawater are detailed in ISO 12473. The general principles of cathodic protection in soils are detailed in EN 12954. ISO 2012 All rights reserved vCopyright European Committee for Standardization Provided by IHS under

31、license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 13174:2012Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 1

32、3174:2012Cathodic protection of harbour installations1 Scope1.1 GeneralThis International Standard defines the means to be used to ensure that cathodic protection is efficiently applied to the immersed and driven/buried metallic external surfaces of steel port, harbour, coastal and flood defence ins

33、tallations and appurtenances in seawater and saline mud to provide protection from corrosion.1.2 StructuresThis International Standard specifies cathodic protection of fixed and floating port and harbour structures. This includes piers, jetties, dolphins (mooring and berthing), sheet or tubular pili

34、ng, pontoons, buoys, floating docks, lock and sluice gates. It also specifies cathodic protection of the submerged areas of appurtenances, such as chains attached to the structure, when these are not electrically isolated from the structure.This International Standard is to be used in respect of cat

35、hodic protection systems where the anodes are exposed to water or saline mud. For buried areas, typically in soil or sand filled areas behind piled walls or within filled caissons, which may be significantly affected by corrosion, specific cathodic protection design and operation requirements are de

36、fined in EN 12954, the anodes being exposed to soils.This International Standard does not cover the cathodic protection of fixed or floating offshore structures (including offshore loading buoys), submarine pipelines or ships.This International Standard does not include the internal protection of su

37、rfaces of any components such as ballast tanks, internals of floating structures flooded compartments of lock and sluice gates or the internals of tubular steel piles.1.3 MaterialsThis International Standard covers the cathodic protection of structures fabricated principally from bare or coated carb

38、on and carbon manganese steels.As some parts of the structure may be made of metallic materials other than carbon steels, the cathodic protection system should be designed to ensure that there is a complete control over any galvanic coupling and minimize risks due to hydrogen embrittlement or hydrog

39、en-induced cracking (see ISO 12473).This International Standard does not address steel reinforced concrete structures (see ISO 12696).1.4 EnvironmentThis International Standard is applicable to the whole submerged zone in seawater, brackish waters and saline mud and related buried areas which can no

40、rmally be found in port, harbour, coastal and flood defence installations wherever these structures are fixed or floating.For surfaces which are alternately immersed and exposed to the atmosphere, the cathodic protection is only effective when the immersion time is long enough for the steel to becom

41、e polarized. Typically, effective cathodic protection is achieved for all surfaces below mid tide.For structures such as sheet steel and tubular steel piles that are driven into the sea bed or those that are partially buried or covered in mud, this International Standard is also applicable to the su

42、rfaces buried, driven and exposed to mud which are intended to receive cathodic protection along with surfaces immersed in water.INTERNATIONAL STANDARD ISO 13174:2012(E) ISO 2012 All rights reserved 1Copyright European Committee for Standardization Provided by IHS under license with CENNot for Resal

43、eNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 13174:2012ISO 13174:2012(E)Cathodic protection may also be applied to the rear faces of sheet steel piled walls and the internal surfaces of filled caissons. Cathodic protection of such surfaces is specified by EN 12954.

44、This International Standard is applicable to those structures which are, or may be in the future, affected by “Accelerated Low Water Corrosion” (ALWC) and other more general forms of microbial corrosion (MIC) or other forms of so-called “concentrated corrosion” associated with galvanic couples, diff

45、erential aeration and other local corrosion influencing parametersNOTE Information is available in BS 6349-1:2000, Clause 59 and CIRIA C634 (see Bibliography)1.5 Safety and environment protectionThis International Standard does not address safety and environmental protection aspects associated with

46、cathodic protection to which national or international regulations apply.2 Normative referencesThe 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

47、 document (including any amendments) applies.ISO 12473, General principles of cathodic protection in sea waterEN 12496, Galvanic anodes for cathodic protection in seawater and saline mudISO 12696, Cathodic protection of steel in concreteEN 12954, Cathodic protection of buried or immersed metallic st

48、ructures General principles and application for pipelinesEN 13509, Cathodic protection measurement techniquesEN 50162, Protection against corrosion by stray current from direct current systems3 Terms and definitionsFor the purposes of this document, the terms and definitions in ISO 12473 and the fol

49、lowing apply.3.1accelerated low water corrosionALWClocalised corrosion generally found on the sea side at or just below the LAT level of structures, but can be present at all immersed levelsNote 1 to entry: This phenomenon is associated with microbiologically influenced corrosion (MIC) and generally quiescent