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1、TECHNICAL SPECIFICATION STANDARD VERTICAL TANKS SELECTION, DESIGN AND FABRICATION DEP 34.51.01.31-Gen. September 1992 DESIGN AND ENGINEERING PRACTICE USED BY COMPANIES OF THE ROYAL DUTCH/SHELL GROUP This document is confidential. Neither the whole nor any part of this document may be disclosed to an
2、y 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 Netherlands. All rights reserved. Neither the whole nor any pa
3、rt of this document may be reproduced, stored in any retrieval system or transmitted in any form or by any means (electronic, mechanical, reprographic, recording or otherwise) without the prior written consent of the copyright owner. PDF created with pdfFactory Pro trial version PREFACE DEP (Design
4、 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. (SIEP) and Shell International Chemicals B.V. (SIC) The Hague, The Netherlands, and other Service Companies.
5、 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 experience of Group Operating companies. Where appropriate they are based on, or reference is made to, na
6、tional 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 refinery, gas handling installation, chemical plant, oil and gas production facility, or any other such facili
7、ty, 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 to implement. This is of particular importance where DEPs may not cover every requirement or diversity of
8、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 and requirements. When Contractors or Manufacturers/Suppliers use DEPs they shall be solely responsible f
9、or 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 follow those design and engineering practices which will achieve the same level of integrity as reflected in t
10、he 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 granted by SIOP, SIEP or SIC, in most cases under Service Agreements primarily with companies of the Royal Dut
11、ch/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 having a Service Agreement with SIOP, SIEP, SIC or other Service Company. The use of DEPs by these Operating
12、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. 3)Contractors/subcontractors and Manufacturers/Suppliers under a contract with users referred to under 1
13、) 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 terms and conditions as may be set forth in specific agreements with users, SIOP, SIEP and SIC disclaim any l
14、iability 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 of any DEP, combination of DEPs or any part thereof. The benefit of this disclaimer shall inure in all res
15、pects 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 under relevant contractual arrangements, DEPs shall not, without the prior written consent of SIOP and SIEP,
16、 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, including any copies which shall only be made by users with the express prior written consent of SIOP and
17、 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 ascertain how users implement this requirement. All administrative queries should be directed to the DEP
18、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 will probably need updating as further experience develops during their use. The above requirements for dis
19、tribution and use of DEPs are also applicable to Standard Specifications and DDDs. Standard Specifications and DDDs will gradually be replaced by DEPs. DEP 34.51.01.31-Gen. September 1992 Page 2 PDF created with pdfFactory Pro trial version TABLE OF CONTENTS 1.INTRODUCTION .5 1.1SCOPE 5 1.2DISTRIBU
20、TION, INTENDED USE AND REGULATORY CONSIDERATIONS5 1.3DEFINITIONS 5 1.4CROSS-REFERENCES 5 1.5GENERAL REQUIREMENTS 6 2.TYPES OF VERTICAL TANKS.7 2.1TYPES AND RANGE OF SIZES .7 2.2ROOF-SUPPORTING STRUCTURES8 2.3USE OF CODE SYSTEMS 9 2.4TYPES OF STANDARD VERTICAL TANKS.10 3.SELECTION OF VERTICAL TANKS 1
21、1 3.1GENERAL11 3.2STABILITY.11 3.3CAPACITIES .12 4.OPERATIONAL FITTINGS FOR VERTICAL TANKS. 13 4.1RANGE OF FITTINGS AND ACCESSORIES .13 4.2FITTINGS COMMON TO ALL VERTICAL TANKS 15 4.3ADDITIONAL FITTINGS FOR FIXED ROOF TANKS 18 4.4SPECIAL FITTINGS AND ACCESSORIES FOR FLOATING ROOF TANKS .20 5.CONSTRU
22、CTION MATERIALS 22 5.1SPECIFICATIONS FOR CARBON STEEL PLATES AND SECTIONS . 22 5.2SPECIFICATIONS FOR MEDIUM HIGH TENSILE STEEL. 23 5.3DESIGN TEMPERATURE .25 5.4NOTCH TOUGHNESS FOR SHELL PLATES AND BOTTOM ANNULAR PLATES.26 5.5MECHANICAL TESTING.27 5.6MILL CERTIFICATES 28 5.7ALLOWABLE STRESSES .29 5.8
23、NOZZLES 30 5.9REINFORCING PLATES.31 5.10STRUCTURAL BOLTS32 5.11FLOATING ROOF SEAL MATERIALS 33 6.DESIGN .34 6.1BOTTOM DESIGN.34 6.2SHELL DESIGN.35 6.3LIMITS FOR SHELL PLATE THICKNESS.36 6.4INTERNAL LOADING37 6.5EXTERNAL LOADING.38 6.6SHELL PLATE ARRANGEMENT 41 6.7TOP CURB ANGLE .42 6.8SHELL OPENINGS
24、 .43 6.9FIXED ROOF DESIGNS44 6.10FLOATING ROOF DESIGNS 46 7.DESIGN OF FITTINGS, MOUNTINGS AND ACCESSORIES 47 7.1GENERAL47 7.2FLANGE DRILLING.47 7.3STAIRWAYS AND WALKWAYS .47 7.4HANDRAILS 47 7.5VERTICAL LADDERS .48 DEP 34.51.01.31-Gen. September 1992 Page 3 PDF created with pdfFactory Pro trial versi
25、on 8.FABRICATION 49 8.1TANK PARTS 49 8.2WELDING50 8.3SHOP-WELDED TANKS .50 8.4WORKSHOP SURFACE TREATMENT AND PAINTING 50 8.5HOLDING-DOWN BOLTS.51 9.REFERENCES 52 10.STANDARD DRAWINGS AND CALCULATIONS 54 APPENDICES .55 APPENDICES APPENDIX 1WORLD MAP SHOWING STRONG WIND AREAS AND MAXIMUM GUST VELOCIT
26、IES56 APPENDIX 2DETERMINATION OF TANK STABILITY IN STRONG WINDS. 57 APPENDIX 3DIAMETERS AND NOMINAL CAPACITIES FOR STANDARD VERTICAL CYLINDRICAL TANKS.58 APPENDIX 4FITTINGS FOR STANDARD VERTICAL FIXED ROOF TANKS 60 APPENDIX 5FITTINGS FOR GROUP STANDARD VERTICAL FLOATING ROOF TANKS61 DEP 34.51.01.31-
27、Gen. September 1992 Page 4 PDF created with pdfFactory Pro trial version 1.INTRODUCTION 1.1SCOPE This DEP is a revision of the earlier publication of the same number and title dated December 1983. It gives the minimum technical requirements for the selection, design and fabrication of standard vert
28、ical steel storage tanks and shall be used in conjunction with requisition sheets DEP 34.51.01.93-Gen. Design and fabrication of the tanks covered by this DEP shall also fulfil all requirements of BS 2654, except where otherwise stated. Fortheerectionandtestingofstandardverticaltanks,referenceismade
29、to DEP 64.51.01.31-Gen. 1.2DISTRIBUTION, INTENDED USE AND REGULATORY CONSIDERATIONS Unless otherwise authorised by SIPM, the distribution of this DEP is confined to companies forming part of the Royal Dutch/Shell Group or managed by a Group company, and to Contractors and Manufacturers nominated by
30、them (i.e. the distribution code is “F“, as described in DEP 00.00.05.05-Gen.). This DEP is intended for use in oil refineries, chemical plants, gas plants, supply/marketing installations and in onshore exploration and production facilities. If national and/or local regulations exist in which some o
31、f the requirements may be more stringent than in this DEP the Contractor shall determine by careful scrutiny which of the requirements are the more stringent and which combination of requirements will be acceptable as regards safety, environmental, economic and legal aspects. In all cases the Contra
32、ctor shall inform the Principal of any deviation from the requirements of this DEP which is considered to be necessary in order to comply with national and/or local regulations. The Principal may then negotiate with the Authorities concerned with the object of obtaining agreement to follow this DEP
33、as closely as possible. 1.3DEFINITIONS The Contractor is the party which carries out all or part of the design, engineering, procurement, construction, commissioning or management of a project or operation of a facility. The Principal may undertake all or part of the duties of the Contractor. The Ma
34、nufacturer/Supplier is the party which manufactures or supplies equipment and services to perform the duties specified by the Contractor. The Principal is the party which initiates the project and ultimately pays for its design and construction. The Principal will generally specify the technical req
35、uirements. The Principal may also include an agent or consultant authorised to act for, and on behalf of, the Principal. The word Shall indicates a requirement. The word Should indicates a recommendation. 1.4CROSS-REFERENCES Where cross-references are made, the number of the section or sub-section r
36、eferred to is shown in brackets. All publications referred to in this document are listed in (9). Available Standard Drawings and calculations are identified in (10). DEP 34.51.01.31-Gen. September 1992 Page 5 PDF created with pdfFactory Pro trial version 1.5GENERAL REQUIREMENTS 1.5.1Standard drawi
37、ngs Contractors drawings and calculations should be based on the set of Shell Standard Drawings,groupS51,forstandardtanks(withtheirstructuralcalculationsand accessories), see (10). Separate drawings exist for each standard diameter of tank, and for accessories, fittings, joint welding details, etc.
38、1.5.2Documents required by local authorities It is the Contractors responsibility to make all drawings and calculations required by local authorities. 1.5.3Approval of drawings The Contractor shall submit the following documents to the Principal: a.Static calculations for shell plate thicknesses, wi
39、nd girders, stiffening rings, roof supporting structure, anchoring, and floating roof. b.All design and fabrication drawings. c.A general arrangement drawing of each tank. This drawing shall be to scale and shall show the position of all mountings and accessories required, with reference to the rele
40、vant detail drawings. d.All static calculations and drawings required by local authorities. e.A marking diagram. If any departure from a Standard Drawing is proposed, static calculations and detail drawings clearly showing these proposed changes shall be submitted to the Principal for approval. A se
41、parate set of documents shall be submitted to the Principal for each requisition. 1.5.4Material certificates Mill certificates for the materials, certifying compliance with the mechanical and chemical requirements, shall be submitted to the Principal prior to commencement of fabrication. 1.5.5Shop i
42、nspection Shop inspection shall be carried out in accordance with the requirements specified in the purchase order. Inspection during site erection is covered by DEP 64.51.01.31-Gen. DEP 34.51.01.31-Gen. September 1992 Page 6 PDF created with pdfFactory Pro trial version 2.TYPES OF VERTICAL TANKS 2
43、.1TYPES AND RANGE OF SIZES Standard vertical tanks are available in several types, which differ in vapour-saving efficiency and in cost. Not every type is available in the full range of diameters, The various types of standard tanks, in order of increasing vapour-saving efficiency and the range of d
44、iameters in which each type is available, are as follows. The coding system is explained in (2.3). 2.1.1Open top tanks (coded BOT) This type of tank has no roof and shall not be selected for the storage of petroleum products, but may be used for fire water/cooling water. They are available in diamet
45、ers of 3 m to 78 m. 2.1.2Fixed roof tanks These tanks can be divided into cone roof and dome roof types and each type can be further sub-divided into non-pressure, low-pressure and high-pressure fixed roof tanks. Non-pressure fixed roof tanks are suitable for storage at atmospheric pressure and are
46、therefore provided with open vents. Low-pressure fixed roof tanks are designed to work at a low internal pressure or vacuum. They are provided with pressure/vacuum breather valves set to be fully open at the design pressures. High-pressure fixed roof tanks are designed to work at higher internal pre
47、ssure or vacuum and are also fitted with pressure/vacuum breather valves set to be fully open at the design pressures. This tank type shall fulfil additional requirements to ensure its stability, see (3.2). The assessed maximum design conditions and the standard diameters available for each type are
48、 as follows: 2.1.2.1Cone roof tanks Design Codepressure/vacuumDiameter range mbar (ga)m Non-pressureBNC7.5/2.53 to 60 incl. Low-pressureBLC20/6.03 to 39 incl. High-pressureBHC56/6.03 to 20 incl. 2.1 2.2Dome roof tanks Design Codepressure/vacuumDiameter range mbar (ga)m Non-pressureBND7.5/2.515 to 39
49、 incl. Low-pressureBLD20/6.015 to 39 incl. High-pressureBHD56/6.015 to 20 incl. DEP 34.51.01.31-Gen. September 1992 Page 7 PDF created with pdfFactory Pro trial version 2.1.2.3Fixed roof tanks with floating covers In a fixed roof tank a floating cover can be installed to give a further reduction of vapour losses. Such tanks should be designed as low-pressure tanks and be limited to a maximum diameter of 39 m. NOTE:This is to allow the future use of pressure/vacuum(PV