DEP 37.19.30.30-Gen.pdf
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1、TECHNICAL SPECIFICATION DESIGN OF CATHODIC PROTECTION SYSTEMS FOR NEW FIXED OFFSHORE STEEL STRUCTURES (AMENDMENTS/SUPPLEMENTS TO DNV RP B401) DEP 37.19.30.30-Gen. December 1995 DESIGN AND ENGINEERING PRACTICE USED BY COMPANIES OF THE ROYAL DUTCH/SHELL GROUP This document is confidential. Neither the
2、 whole nor any part of this document may be disclosed to any third party without the prior written consent of Shell Internationale Petroleum Maatschappij B.V., The Hague, the Netherlands. The copyright of this document is vested in Shell Internationale Petroleum Maatschappij B.V., The Hague, the Net
3、herlands. All rights reserved. Neither the whole nor any part of this document may be reproduced, stored in any retrieval system or transmitted PDF created with pdfFactory Pro trial version in any form or by any means (electronic, mechanical, reprographic, recording or otherwise) without the prior
4、written consent of the copyright owner. PDF created with pdfFactory Pro trial version PREFACE DEP (Design and Engineering Practice) publications reflect the views, at the time of publication, of: Shell International Oil Products B.V. (SIOP) and Shell International Exploration and Production B.V. (S
5、IEP) and Shell International Chemicals B.V. (SIC) The Hague, The Netherlands, and other Service Companies. They are based on the experience acquired during their involvementwith the design, construction, operation and maintenance of processing units and facilities, and they are supplemented with the
6、 experience of Group Operating companies. Where appropriate they are based on, or reference is made to, national and international standards and codes of practice. The objective is to set the recommendedstandard for good design and engineeringpractice applied by Group companies operating an oil refi
7、nery, gas handling installation, chemical plant, oil and gas production facility, or any other such facility, and thereby to achieve maximum technical and economic benefit from standardization. The information set forth in these publications is provided to users for their consideration and decision
8、to implement. This is of particular importance where DEPs may not cover every requirement or diversity of condition at each locality. The system of DEPs is expected to be sufficiently flexible to allow individual operating companies to adapt the information set forth in DEPs to their own environment
9、 and requirements. When Contractors or Manufacturers/Suppliers use DEPs they shall be solely responsible for the quality of work and the attainment of the required design and engineering standards. In particular, for those requirements not specifically covered, the Principal will expect them to foll
10、ow those design and engineering practices which will achieve the same level of integrity as reflected in the DEPs. If in doubt, the Contractor or Manufacturer/Supplier shall, without detracting from his own responsibility, consult the Principal or its technical advisor. The right to use DEPs is gran
11、ted by SIOP, SIEP or SIC, in most cases under Service Agreements primarily with companies of the Royal Dutch/Shell Group and other companies receiving technical advice and services from SIOP, SIEP or SIC. Consequently, three categories of users of DEPs can be distinguished: 1)Operating companies hav
12、ing a Service Agreement with SIOP, SIEP, SIC or other Service Company. The use of DEPs by these Operating companies is subject in all respects to the terms and conditions of the relevant Service Agreement. 2)Other parties who are authorized to use DEPs subject to appropriate contractual arrangements
13、. 3)Contractors/subcontractors and Manufacturers/Suppliers under a contract with users referred to under 1) or 2) which requires that tenders for projects, materials supplied or - generally - work performed on behalf of the said users comply with the relevant standards. Subject to any particular ter
14、ms and conditions as may be set forth in specific agreements with users, SIOP, SIEP and SIC disclaim any liability of whatsoever nature for any damage (including injury or death) suffered by any company or person whomsoever as a result of or in connection with the use, application or implementation
15、of any DEP, combination of DEPs or any part thereof. The benefit of this disclaimer shall inure in all respects to SIOP, SIEP, SIC and/or any company affiliated to these companies that may issue DEPs or require the use of DEPs. Without prejudice to any specific terms in respect of confidentiality un
16、der relevant contractual arrangements, DEPs shall not, without the prior written consent of SIOP and SIEP, be disclosed by users to any company or person whomsoever and the DEPs shall be used exclusively for the purpose for which they have been provided to the user. They shall be returned after use,
17、 including any copies which shall only be made by users with the express prior written consent of SIOP and SIEP. The copyright of DEPs vests in SIOP and SIEP. Users shall arrange for DEPs to be held in safe custody and SIOP or SIEP may at any time require information satisfactory to them in order to
18、 ascertain how users implement this requirement. All administrative queries should be directed to the DEP Administrator in SIOP. NOTE: In addition to DEP publications there are Standard Specifications and Draft DEPs for Development (DDDs). DDDs generally introduce new procedures or techniques that w
19、ill probably need updating as further experience develops during their use. The above requirements for distribution and use of DEPs are also applicable to Standard Specifications and DDDs. Standard Specifications and DDDs will gradually be replaced by DEPs. DEP 37.19.30.30-Gen. December 1995 Page 2
20、PDF created with pdfFactory Pro trial version TABLE OF CONTENTS PART IINTRODUCTION .5 1.1SCOPE 5 1.2DISTRIBUTION, INTENDED USE AND REGULATORY CONSIDERATIONS5 1.3DEFINITIONS 5 1.4CROSS-REFERENCES 5 PART IIDESIGN PHILOSOPHY 6 1.1GENERAL6 1.2DESIGN TEMPLATE, COMPUTER SPREADSHEET . 6 PART IIIAMENDMENTS
21、/SUPPLEMENTS TO DNV RP B401, 1993 EDITION 7 2.SCOPE 8 3.DEFINITIONS, SYMBOLS AND ABBREVIATIONS . 9 3.1PARTIES AND RESPONSIBILITIES .9 3.2USE OF LANGUAGE 9 5.GENERAL DESIGN CONSIDERATIONS .10 5.5DETRIMENTAL EFFECTS OF CATHODIC PROTECTION 10 5.7SACRIFICIAL ANODE MATERIALS10 5.8ANODE GEOMETRY 10 6.DESI
22、GN PARAMETERS .11 6.1GENERAL11 6.2DESIGN LIFE 11 6.3DESIGN CURRENT DENSITIES.11 6.4COATING BREAKDOWN FACTOR AND PAINT COATINGS. 12 6.5PIPELINE COATINGS.12 6.6SACRIFICIAL ANODE MATERIAL PERFORMANCE . 12 6.7ANODE RESISTANCE FORMULAS .14 6.8RESISTIVITY - SEAWATER14 6.9ANODE UTILISATION FACTOR .14 7.DES
23、IGN TASKS15 7.1GENERAL15 7.2SUB-DIVISION OF OBJECT .15 7.3SURFACE AREA CALCULATIONS.15 7.4CURRENT DEMAND CALCULATIONS 15 7.5CURRENT DRAIN CALCULATIONS.16 7.6SELECTION OF ANODE TYPE AND DIMENSIONS 16 7.7ANODE MASS CALCULATIONS 16 7.8CALCULATION OF NUMBER OF ANODES .16 7.9DETAILED ANODE DESIGN.17 7.10
24、DISTRIBUTION OF ANODES .17 7.11ANODE MOUNTING AND PROVISIONS FOR ELECTRICAL CONTINUITY .17 7.12ENGINEERING DOCUMENTATION .18 8.MANUFACTURING OF SACRIFICIAL ANODES . 19 8.2QUALIFICATION OF ANODE MANUFACTURING . 19 8.3STANDARDS.19 9.INSTALLATION OF SACRIFICIAL ANODES.20 9.2PIPELINE ANODES 20 10.IMPRES
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