DEP 70.51.10.11-Gen.pdf
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1、MANUAL FIELD INSPECTION, MAINTENANCE AND REPAIR OF VERTICAL STEEL STORAGE TANKS DEP 70.51.10.11-Gen. July 1998 DESIGN AND ENGINEERING PRACTICE This document is confidential. Neither the whole nor any part of this document may be disclosed to any third party without the prior written consent of Shell
2、 International Oil Products B.V. and Shell International Exploration and Production B.V., The Hague, The Netherlands. The copyright of this document is vested in these companies. All rights reserved. Neither the whole nor any part of this document may be reproduced, stored in any retrieval system or
3、 transmitted in any form or by any PDF created with pdfFactory Pro trial version means (electronic, mechanical, reprographic, recording or otherwise) without the prior written consent of the copyright owners. PDF created with pdfFactory Pro trial version PREFACE DEP (Design and Engineering Practic
4、e) 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. (SIEP) and Shell International Chemicals B.V. (SIC) The Hague, The Netherlands, and other Service Companies. They are based on the e
5、xperience acquired during their involvementwith the design, construction, operation and maintenance of processing units and facilities, and they are supplemented with the experience of Group Operating companies. Where appropriate they are based on, or reference is made to, national and international
6、 standards and codes of practice. The objective is to set the recommendedstandard for good design and engineeringpractice applied by Group companies operating an oil refinery, gas handling installation, chemical plant, oil and gas production facility, or any other such facility, and thereby to achie
7、ve maximum technical and economic benefit from standardization. The information set forth in these publications is provided to users for their consideration and decision to implement. This is of particular importance where DEPs may not cover every requirement or diversity of condition at each locali
8、ty. 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 and requirements. When Contractors or Manufacturers/Suppliers use DEPs they shall be solely responsible for the quality of work a
9、nd the attainment of the required design and engineering standards. In particular, for those requirements not specifically covered, the Principal will expect them to follow those design and engineering practices which will achieve the same level of integrity as reflected in the DEPs. If in doubt, th
10、e Contractor or Manufacturer/Supplier shall, without detracting from his own responsibility, consult the Principal or its technical advisor. The right to use DEPs is granted by SIOP, SIEP or SIC, in most cases under Service Agreements primarily with companies of the Royal Dutch/Shell Group and other
11、 companies receiving technical advice and services from SIOP, SIEP or SIC. Consequently, three categories of users of DEPs can be distinguished: 1)Operating companies having a Service Agreement with SIOP, SIEP, SIC or other Service Company. The use of DEPs by these Operating companies is subject in
12、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. 3)Contractors/subcontractors and Manufacturers/Suppliers under a contract with users referred to under 1) or 2) which requires t
13、hat tenders for projects, materials supplied or - generally - work performed on behalf of the said users comply with the relevant standards. Subject to any particular terms and conditions as may be set forth in specific agreements with users, SIOP, SIEP and SIC disclaim any liability of whatsoever n
14、ature 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 of any DEP, combination of DEPs or any part thereof. The benefit of this disclaimer shall inure in all respects to SIOP, SIEP, SIC
15、 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 under relevant contractual arrangements, DEPs shall not, without the prior written consent of SIOP and SIEP, be disclosed by users t
16、o 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, including any copies which shall only be made by users with the express prior written consent of SIOP and SIEP. The copyright of
17、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 ascertain how users implement this requirement. All administrative queries should be directed to the DEP Administrator in SIOP. N
18、OTE: In addition to DEP publications there are Standard Specifications and Draft DEPs for Development (DDDs). DDDs generally introduce new procedures or techniques that will probably need updating as further experience develops during their use. The above requirements for distribution and use of DEP
19、s are also applicable to Standard Specifications and DDDs. Standard Specifications and DDDs will gradually be replaced by DEPs. DEP 70.51.10.11-Gen. July 1998 Page 2 PDF created with pdfFactory Pro trial version TABLE OF CONTENTS 1.INTRODUCTION .5 1.1SCOPE 5 1.2DISTRIBUTION, INTENDED USE AND REGULA
20、TORY CONSIDERATIONS5 1.3DEFINITIONS 5 1.4CROSS-REFERENCES 5 1.5MAIN CHANGES SINCE PREVIOUS EDITION 5 2.GENERAL .7 3.INSPECTION FREQUENCY .8 3.1GENERAL8 3.2CONDITION-BASED INSPECTION 8 4.TANK INSPECTION 9 4.1GENERAL9 4.2EXTERNAL ROUTINE VISUAL INSPECTION 10 4.3EXTERNAL DETAILED INSPECTION.11 4.4THICK
21、NESS MEASUREMENTS (EXTERNAL).14 4.5INTERNAL INSPECTION 16 4.6FLOATING SUCTION21 5.EVALUATION CRITERIA22 5.1FOUNDATION .22 5.2BOTTOM .22 5.3TANK SHELL.22 5.4FIXED ROOF.24 5.5FLOATING ROOF .24 5.6WIND GIRDERS24 6.TANK REPAIR AND PROTECTION .25 6.1GENERAL25 6.2FOUNDATION REPAIR.26 6.3BOTTOM REPAIR AND
22、REPLACEMENT.28 6.4COATING AND PROTECTION OF TANK BOTTOMS 31 6.5SHELL REPAIRS.33 6.6FIXED ROOF REPAIRS 36 6.7FLOATING ROOF REPAIRS.37 6.8REPAIR TO FITTINGS 39 6.9HOT TAPS.40 6.10EXTERNAL TANK COATING 41 7.ADDITION OF COURSES TO EXISTING TANKS 42 7.1DETAILS OF THE SYSTEM FOR ADDING COURSES 42 7.2TESTI
23、NG .42 7.3VENTILATION .42 8.DISMANTLING AND RE-ERECTION OF VERTICAL TANKS . 43 8.1GENERAL43 9.RESITING OF VERTICAL TANKS44 9.1GENERAL44 9.2MOVING USING A CRANE PLUS SPREADER BEAM. 44 9.3MOVING ON RAIL TRACKS .44 9.4MOVING BY AIR-CUSHION METHOD44 9.5MOVING BY FLOATING .44 9.6MOVING BY SELF-PROPELLED
24、TRAILERS .45 9.7TESTING REQUIREMENTS .45 DEP 70.51.10.11-Gen. July 1998 Page 3 PDF created with pdfFactory Pro trial version 10.REFERENCES 46 APPENDICES APPENDIX 1INSPECTION FREQUENCIES .48 APPENDIX 2REFERENCE POINT SYSTEM 49 APPENDIX 3TANK JACKING .50 APPENDIX 4VENTING54 APPENDIX 5SHELL STABILITY
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