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1、BRITISH STANDARD BS EN 13636:2004 Cathodic protection of buried metallic tanks and related piping The European Standard EN 13636:2004 has the status of a British Standard ICS 23.020.10; 77.060 ? icensed copy:PONTYPRIDD COLLEGE, 30/05/2008, Uncontrolled Copy, BSI BS EN 13636:2004 This British Standar
2、d was published under the authority of the Standards Policy and Strategy Committee on 5 August 2004 BSI 5 August 2004 ISBN 0 580 44225 X National foreword This British Standard is the official English language version of EN 13636:2004. It partially supersedes BS 7361-1:1991, Code of practice for lan
3、d and marine applications, which will be withdrawn when all the CEN standards relating to cathodic protection currently being prepared are published.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
4、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 in the BSI Catalogue under the section entitled “International Standards Co
5、rrespondence 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 responsible for its correct application. Compliance with a British Standard does n
6、ot 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 the UK interests informed; monitor related international and European developm
7、ents 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 42, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issu
8、ed since publication Amd. No. DateComments icensed copy:PONTYPRIDD COLLEGE, 30/05/2008, Uncontrolled Copy, BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 13636 July 2004 ICS 23.020.10; 77.060 English version Cathodic protection of buried metallic tanks and related piping Protection cathodi
9、que des rservoirs mtalliques enterrs et conduites associes Kathodischer Korrosionsschutz von unterirdischen metallenen Tankanlagen und zugehrigen Rohrleitungen This European Standard was approved by CEN on 3 November 2003. CEN members are bound to comply with the CEN/CENELEC Internal Regulations whi
10、ch 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 national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Sta
11、ndard 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 and notified to the Central Secretariat has the same status as the official versions. CEN members are the national sta
12、ndards bodies of 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, Switzerland and United Kingdom. EUROPEAN CO
13、MMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2004 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13636:2004: E icensed copy:PONTYPR
14、IDD COLLEGE, 30/05/2008, Uncontrolled Copy, BSI EN 13636:2004 (E) 2 Contents Page Foreword. 5 1 Scope 6 2 Normative references . 6 3 Terms and definitions. 8 4 Criteria for cathodic protection . 9 5 Prerequisites for the application of cathodic protection 9 5.1 General. 9 5.2 Electrical continuity 1
15、0 5.3 Electrical separation. 10 5.4 External coating 10 6 Base data for design. 11 6.1 General. 11 6.2 Neighbouring structures 11 6.3 Soil environment. 11 6.4 Tank and piping data 11 6.4.1 General. 11 6.4.2 Stored medium 12 7 Design and prerequisites. 12 7.1 Structure materials . 12 7.2 Electrical s
16、eparation. 13 7.2.1 General. 13 7.2.2 Isolating devices. 13 7.2.3 Temporary connections . 13 7.2.4 Permanently connected electrical equipment . 13 7.3 Explosion hazard prevention. 14 7.3.1 General. 14 7.3.2 Electrical equipment installation. 14 7.3.3 Isolating joints. 14 7.4 Other equipment . 15 7.4
17、.1 Test station 15 7.4.2 Coupons. 16 7.4.3 Mechanical connections including flanges 16 7.4.4 Sleeve pipe 16 7.4.5 Wall entries 16 7.4.6 Drainage station 16 7.4.7 Local earthing systems 16 7.5 Galvanic anode systems 16 7.5.1 General. 16 7.5.2 Materials. 17 7.5.3 Location . 17 7.5.4 Connection of anod
18、es to the structure. 17 7.6 Impressed current systems . 17 7.6.1 General. 17 7.6.2 Components 17 7.7 Cables. 18 7.8 Interference 19 8 Installation of cathodic protection systems. 19 8.1 General. 19 icensed copy:PONTYPRIDD COLLEGE, 30/05/2008, Uncontrolled Copy, BSI EN 13636:2004 (E) 3 8.2 Installati
19、on of cables. 20 8.2.1 General. 20 8.2.2 Cable connections to structures. 20 8.3 Installation of structures to be protected. 21 8.3.1 Buried structures 21 8.3.2 Above-ground structures. 21 8.3.3 Isolating joints. 21 8.4 Anodes. 22 8.4.1 General. 22 8.4.2 Galvanic anodes 22 8.4.3 Impressed current an
20、odes. 22 8.5 Impressed current station 23 8.5.1 Location . 23 8.5.2 Electrical installation 23 8.6 Test stations, measuring points and coupons 23 8.7 Bondings and drainage stations . 23 8.8 Labelling 23 8.9 Installation checks 24 8.10 As-built documentation 24 9 Commissioning . 24 9.1 Preliminary ch
21、ecking 24 9.2 Start-up. 25 9.3 Verification of the cathodic protection effectiveness. 25 9.4 Determination of relevant measuring points . 25 9.5 Commissioning documents. 26 10 Inspection and maintenance 26 10.1 General. 26 10.2 Inspection 26 10.2.1 General. 26 10.2.2 Functional checks of equipment.
22、27 10.2.3 Structure measurements 27 10.2.4 Inspection intervals 27 10.2.5 Inspection report. 29 10.3 Maintenance 29 10.3.1 Cathodic protection equipment. 29 10.3.2 Instrumentation. 29 Annex A (informative) Electrical separation between the structure to be cathodically protected and the general earth
23、ing system . 30 A.1 Isolation of electrical equipment. 30 A.2 Electrical equipment of protection class II or III (double isolation). 31 A.3 Fault current breaker with local earthing system 32 A.4 Isolating transformer 33 A.5 Example with d.c. decoupling unit 34 Annex B (informative) Groundbed data 3
24、5 B.1 General considerations 35 B.2 Type of groundbed 35 B.2.1 General. 35 B.2.2 Remote located groundbed . 35 B.2.3 Close located groundbed. 35 B.3 Anode type. 36 B.3.1 High-silicon cast iron anodes 36 B.3.2 Mixed-metal oxide anodes . 37 Annex C (informative) Extract of pr EN 50162 . 38 Annex D (in
25、formative) Determination of inspection interval 39 D.1 General. 39 D.2 Complexity of the cathodic protection system 39 icensed copy:PONTYPRIDD COLLEGE, 30/05/2008, Uncontrolled Copy, BSI EN 13636:2004 (E) 4 D.3 Coating imperfections 39 D.4 Environmental conditions 40 D.5 Susceptibility to damage by
26、lightning or mechanical impact 41 D.6 Risk of personal injury, environmental pollution or damage to property that could be caused by leakage of stored medium41 Bibliography . 42 icensed copy:PONTYPRIDD COLLEGE, 30/05/2008, Uncontrolled Copy, BSI EN 13636:2004 (E) 5 Foreword This document EN 13636:20
27、04 has been prepared by Technical Committee CEN/TC 219 “Cathodic protection”, the secretariat of which is held by BSI. This document 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
28、 standards shall be withdrawn at the latest by January 2005. 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,
29、Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. This document, which deals with buried metallic tanks and associated piping, takes into account the speci
30、fic features of buried tanks in terms of construction, electrical equipment and safety considerations. The present document only covers the technical aspects of corrosion protection of tanks and associated piping. The application of cathodic protection depends on national requirements and the factor
31、s outlined in EN 12954:2001, Clause 5. EN 12954, also prepared by CEN TC 219/WG1, is concerned with cathodic protection against corrosion of buried or immersed metallic structures and gives general principles applicable to the protection of all types of such structures. Cathodic protection is a tech
32、nique based on the application of electrochemical principles and covers a wide variety of materials and equipment together with a variety of measurement techniques. It is assumed in the drafting of this document that the design, installation, commissioning, inspection and maintenance are entrusted t
33、o adequately trained, experienced, competent and reliable personnel in order to achieve effective and efficient cathodic protection. icensed copy:PONTYPRIDD COLLEGE, 30/05/2008, Uncontrolled Copy, BSI EN 13636:2004 (E) 6 1 Scope This document specifies the principles for the implementation of a syst
34、em of cathodic protection against corrosive attacks on buried metal tanks and associated piping. This document specifies conditions and parameters to be met in order to achieve cathodic protection, as well as rules and procedures for the design, installation, commissioning and maintenance for the pr
35、otection of buried metal tanks and associated piping. This document is applicable to the external surfaces of buried metallic tanks and associated buried piping. NOTE The protection of internal surfaces is covered by EN 12499. This document is applicable to buried tanks and associated piping, even i
36、f they are earthed by their own local earthing device, which are electrically separated from any general earthing systems and other buried structures. Therefore tanks which are covered by the present document include: industrial storage tanks, irrespective of their dimensions and the nature of the s
37、tored medium (liquid or gas, flammable or not, toxic or non-toxic, polluting or not); tanks used at petrol stations and on domestic or commercial premises, which contain flammable liquids or gases or polluting substances. This document is not applicable to: above-ground storage tank floors in contac
38、t with the ground; reinforced concrete containers; buried storage tanks that are electrically connected to the whole or a part of an industrial complex; buried storage tanks electrically connected to any general earthing systems. NOTE Cathodic protection of the last two types of tanks is covered by
39、prEN 14505. Measurement techniques are described in detail in EN 13509. 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
40、 document (including any amendments) applies. EN 12954:2001, Cathodic protection of buried or immersed metallic structures General principles and application for pipelines. prEN 14505:2002, Cathodic protection of complex structures. EN 50014, Electrical apparatus for potentially explosive atmosphere
41、s General requirements. EN 50016, Electrical apparatus for potentially explosive atmospheres Pressurized apparatus “p”. icensed copy:PONTYPRIDD COLLEGE, 30/05/2008, Uncontrolled Copy, BSI EN 13636:2004 (E) 7 EN 50017, Electrical apparatus for potentially explosive atmospheres Powder filling “q”. EN
42、50018, Electrical apparatus for potentially explosive atmospheres Flameproof enclosures “d”. EN 50019, Electrical apparatus for potentially explosive atmospheres Increased safety “e”. EN 50020, Electrical apparatus for potentially explosive atmospheres Intrinsic safety “i”. EN 50021, Electrical appa
43、ratus for potentially explosive atmospheres Types of protection “n”. EN 50028, Electrical apparatus for potentially explosive atmospheres Encapsulation “m”. EN 50039, Electrical apparatus for potentially explosive atmospheres Intrinsically safe electrical systems “i”. EN 50162:2003, Protection again
44、st corrosion by stray current from direct current systems. EN 60079-10, Electrical apparatus for explosive gas atmospheres Part 10: Classification of hazardous areas (IEC 6007910:1995). EN 60742, Isolating transformers and safety isolating transformers Requirements (IEC 60742:1983 + A1:1992, modifie
45、d). EN 61140, Protection against electric shock Common aspects for installation and equipment (IEC 61140:2001). EN ISO 8044:1999, Corrosion of metals and alloys Basic terms and definitions (ISO 8044:1999). IEC 60587, Methods for evaluating resistance to tracking and erosion of electrical insulating
46、materials used under severe ambient conditions. icensed copy:PONTYPRIDD COLLEGE, 30/05/2008, Uncontrolled Copy, BSI EN 13636:2004 (E) 8 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 12954, EN 60079-10, EN ISO 8044 and the following apply. 3.1 electr
47、ical connection (electrically connected) connection allowing the flow of electrons between two different metallic structures Figure 1 Example of bonding permitting flow of current 3.2 electrical separation (electrically separated) separation of two different metallic structures to prevent the flow o
48、f electrons between them Figure 2 Example of isolation to prevent the flow of currrent 3.3 associated piping all metallic process piping that is electrically connected to a buried tank and is protected by the cathodic protection system of the tank 3.4 local earthing system local earthing system for
49、the structure under consideration which is electrically separated from any other general earthing e.g. welding metallic bond or cable Structure 1Structure 2 Structure 1Structure 2Structure 1Structure 2 Structure 1 Structure 2 Structure 1 Structure 2 Isolating material icensed copy:PONTYPRIDD COLLEGE, 30/05/2008, Uncontrolled Copy, BSI EN 13636:2004 (E) 9 3.5 shield conductive or non conductive structure or object, which modifies the