EN 13173-2001 en Cathodic Protection for Steel Offshore Floating Structures《钢制近海浮式建筑物的阴极保护》.pdf
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1、BRITISH STANDARD Cathodic protection for steel offshore floating structures The European Standard EN 13173:2001 has the status of a British Standard ICs 75.180.10; 77.060 BS EN 13173:ZOOl NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 13173:2001 Amd. No. National forewo
2、rd Date Comments This British Standard is the official English language version of EN 13173:2001. Reference should also be made to BS 7361, Code of practice for land and marine applications, which will eventually be withdrawn when all the CEN standards relating to cathodic protection currently being
3、 prepared, are published. The UK participation in its preparation was entrusted to Technical Committee GEU603, Cathodic protection, which has the responsibility to: - - aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposa
4、ls for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. - A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement intern
5、ational or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to inclu
6、de all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. This British Standard, having been prepared under the direction of the Electrotechnic
7、al Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15June2001 Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 25 and a back cover. The BSI copyright date displayed in this document in
8、dicates when the document was last issued. O BSI 06-2001 ISBN O 580 37634 6 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM O EN 13173 January 2001 ICs 47.020.01; 77.060 English version Cathodic protection for steel offshore floating structures Protection cathodique des structures en acier flottan
9、t en mer Kathodischer Korrosionsschutz fr schwimmende Offshore- Anlagen aus Stahl This European Standard was approved by CEN on 6 July 2000. CEN members are bound to comply with the CENICENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a nati
10、onal standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any
11、other language made by translation under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the OffiCial versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany,
12、Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMEE FOR STANDARDIZATION COMITE EUROPEEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels O 2001 CEN All rights
13、of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13173:2001 E Page 2 EN 131 73:2001 Contents Foreword 4 Introduction . 4 1 Scope 5 1.1 Structures 5 1.2 Materials . 5 1.3 Environment 5 1.4 Safety and environment protection . 6 2 Normative reference
14、s 6 3 Terms and definitions 6 4 Design basis . 7 4.1 Objectives 7 4.2 Cathodic protection criteria . 7 4.3 Design parameters 7 Cathodic protection systems . 1 0 4.6 Electrical continuity 11 4.4 Electrical current demand 8 4.5 4.7 Interactions 11 5 5.1 objectives 11 5.2 Design considerations 12 5.3 E
15、quipment considerations . 12 6 Galvanic anode system design . 14 6.1 Objectives 14 6.2 Design considerations 14 6.3 Factors determining the anode current output and operating life . 15 6.4 Location of anodes . 16 Impressed current system design 11 Page 3 EN 131 73:2001 7 Cathodic protection system m
16、onitoring 16 7.1 Objectives 16 7.2 Potential measurements 16 7.3 Measurement of the impressed current anode electrical current output 17 7.4 7.5 Additional monitoring methods . 17 8 Documentation . 18 Impressed current power source control . 17 8.1 Objectives 18 8.2 8.3 Annex A (informative) structu
17、res . 20 Impressed current system . 18 Galvanic anode systems 19 Guidance for current requirements for cathodic protection of offshore floating Annex B (informative) Anode resistance and life determination 21 Annex C (informative) Typical electrochemical characteristics of impressed current anodes .
18、 23 Annex D (informative) Typical cofferdam arrangements . 24 Page 4 EN 131 73:2001 Foreword This European Standard has been prepared by Technical Committee CEN/TC 21 9 “Cathodic protection“, the secretariat of which is held by BSI. This European Standard shall be given the status of a national stan
19、dard, either by publication of an identical text or by endorsement, at the latest by July 2001, and conflicting national standards shall be withdrawn at the latest by July 2001. According to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are boun
20、d to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Page 5 EN 131 73:2001 Introduction Cathodic protection is usually
21、 applied, mostly as a complement to protective coating or paint, to protect the external surfaces of steel offshore floating structures and appurtenances from corrosion due to sea water or saline mud. Cathodic protection works by supplying sufficient direct current to the immersed surface of the str
22、ucture in order to change the steel to electrolyte potential to values where corrosion is insignificant. The general principles of cathodic protection are detailed in EN 12473. 1 Scope steel offshore floating structures and appurtenances in sea water and saline mud. 1.1 Structures This European Stan
23、dard defines the means to be used to cathodically protect the submerged metallic surfaces of This European Standard covers the cathodic protection of the external surface of offshore floating structures which are static during their usual operating conditions. This essentially includes: barges, jack
24、-ups, semi-submersible platforms, storage tankers, buoys, etc. It also covers the submerged areas of appurtenances, such as chains, attached to the structure, when these are not electrically isolated from the structure. It does not cover the cathodic protection of ships, fixed offshore structures, e
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