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1、TECHNICAL SPECIFICATION SELECTED CONSTRUCTION MATERIALS FOR SHELL AND TUBE HEAT EXCHANGERS DEP 31.21.01.31-Gen. November 1989 (DEP Circulars 22/92 and 55/97 have been incorporated) DESIGN AND ENGINEERING PRACTICE USED BY COMPANIES OF THE ROYAL DUTCH/SHELL GROUP This document is confidential. Neither
2、 the 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
3、 Netherlands. All rights reserved. Neither the whole nor any part 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. PRE
4、FACE 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. (SIEP) and Shell International Chemicals B.V. (SIC) The Hague, The Netherlands, and other Se
5、rvice Companies. They are based on the experience acquired during their involvement with 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 referen
6、ce is made to, national and international standards and codes of practice. The objective is to set the recommended standard for good design and engineering practice applied by Group companies operating an oil refinery, gas handling installation, chemical plant, oil and gas production facility, or an
7、y 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 to implement. This is of particular importance where DEPs may not cover every requireme
8、nt 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 and requirements. When Contractors or Manufacturers/Suppliers use DEPs they shall be s
9、olely 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 follow those design and engineering practices which will achieve the same level of integrit
10、y 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 granted by SIOP, SIEP or SIC, in most cases under Service Agreements primarily with compani
11、es 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 having a Service Agreement with SIOP, SIEP, SIC or other Service Company. The use of DEPs
12、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. 3)Contractors/subcontractors and Manufacturers/Suppliers under a contract with users
13、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 terms and conditions as may be set forth in specific agreements with users, SIOP, SIEP and
14、 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 of any DEP, combination of DEPs or any part thereof. The benefit of this disclaimer sha
15、ll 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 under relevant contractual arrangements, DEPs shall not, without the prior written consen
16、t 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, including any copies which shall only be made by users with the express prior written
17、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 ascertain how users implement this requirement. All administrative queries should be d
18、irected 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 will probably need updating as further experience develops during their use. The above r
19、equirements 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 31.21.01.31-Gen. November 1989 Page 2 TABLE OF CONTENTS 1.INTRODUCTION.4 1.1GENERAL 4 1.2DEFINITIONS 5 2.CLASSIFICATIONOF MAT
20、ERIAL SPECIFICATION LISTS.6 3.BACKGROUND INFORMATION TO ADDITIONAL REQUIREMENTS7 3.1GENERAL 7 4.MATERIAL SPECIFICATION LISTS INCLUDING SKETCHES OF HEAT EXCHANGERS10 LIST 1MATERIAL SPECIFICATION FOR SHELL AND TUBE HEAT EXCHANGERS 12 LIST 2MATERIAL SPECIFICATION FOR REBOILERS14 LIST 3MATERIAL SPECIFIC
21、ATION FOR COOLERS AND CONDENSERS WITH FLOATING HEAD16 LIST 4MATERIAL SPECIFICATION FOR COOLERS AND CONDENSERS WITH FIXED TUBE SHEETS18 LIST 5MATERIAL SPECIFICATION FOR STAINLESS STEEL HEAT EXCHANGERS WITH A FLOATING HEAD20 LIST 6MATERIAL SPECIFICATION FOR ALLOY N04400 (MONEL 400) HEAT EXCHANGERS WIT
22、H A FLOATING HEAD.22 5.REFERENCES24 6.APPENDICES25 APPENDICES APPENDIX 1LISTS OF MATERIAL SPECIFICATIONS FOR SHELL-AND-TUBE HEAT EXCHANGERS26 APPENDIX 2METHOD OF DETECTION OF HARMFUL OXIDE FILMS ON COPPER- NICKEL ALLOY TUBES.27 DEP 31.21.01.31-Gen. November 1989 Page 3 1.INTRODUCTION 1.1GENERAL This
23、publicationcontainsanumberofself-containedlistswithdetailedmaterial specifications for non-fired shell-and-tube heat exchangers including coolers, condensers and reboilers used. It is not intended as a materials selection guide. The overall selection of construction materials should be made after ca
24、reful consideration of operating conditions, if necessary in consultation with the materials/corrosion engineering department. Once the selection has been determined, however, the lists in this specification will enable quick and effective specification of all heat exchanger parts. The lists as pres
25、ented refer primarily to refinery and chemical plant service. This edition constitutes a complete revision. The format of the lists has been changed to facilitate a unique numbering system for listing the components of the various heat exchanger types. As this DEP is intended to be an aid for comple
26、ting heat exchanger requisition forms the nomenclature of these sheets has been adhered to. The component list matches the list format as presented on the data requisition sheet, according to DEP 31.21.00.93-Gen. Sheet 6, for heat exchangers. All remarks added to material specifications are combined
27、 in one single short list of comprehensive notes, to which reference is made in the appropriate cases. More detail and some background information to this list is given separately in Section 3 in this document. Compared to the 1974 issue a significant reduction of additional requirements has been ac
28、hieved. The designation of materials refers to the ASTM standards. For comparable material standards, refer to DEP 30.10.02.11-Gen. “Metallic materials“. When specific corrosive circumstances have to be taken into account or materials do not comply with the standard, the materials engineering depart
29、ment must be consulted. Unless otherwise authorized by SIPM, the distribution of this specification is confined to companies forming part of or managed by the Royal Dutch/Shell Group and to contractors nominated by them. As a rule the requirements of this specification shall be adhered to. However,
30、national and/or local regulations may exist in which some of the requirements are more stringent. The contractor shall determine by careful scrutiny which of the requirements are more stringent and which combination of requirements will be acceptable as regards safety, economic and legal aspects. In
31、 all cases the contractor shall inform the principal of any deviation from the requirements of this specification 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 obtainin
32、g agreement to follow this specification as closely as possible. Where cross references are made, the number of the section or sub-section referred to is shown in brackets. DEP 31.21.01.31-Gen. November 1989 Page 4 1.2DEFINITIONS For the purpose of this specification, the following definitions shall
33、 hold : Shall and Should - the word shall is to be understood as mandatory and the word should as strongly recommended to comply with the requirements of this specification. The Principal is the party which initiates the project and ultimately pays for its design and construction. The Principal will
34、 generally specify the technical requirements. The Principal may also include an agent or consultant, authorized to act for the Principal. The Contractor is the party which carries out all or part of the design, engineering, procurement, construction and commissioning for the project. The Principal
35、may sometimes undertake all or part of the duties of the Contractor. DEP 31.21.01.31-Gen. November 1989 Page 5 2.CLASSIFICATIONOF MATERIAL SPECIFICATION LISTS Six main groups of material specifications have been considered: List 1.Heat exchangers. List 2.Reboilers. List 3.Coolers and condensers with
36、 floating head. List 4.Coolers and condensers with fixed tube sheets. List 5.Heat exchangers made of stainless steel. List 6.Heat exchangers made of Monel 400, Alloy N04400. The most common types of heat exchangers are considered in the lists mentioned above. Among these are: fixed tube sheet, float
37、ing head and hairpin bundle designs. It is not the intention to cover all possible heat exchanger designs. Specifications for variants are easy to derive in most cases as materials are virtually the same. For instance “pull through bundle designs“ are not considered in the specification lists since
38、there are only minor dimensional differences from a standard floating head heat exchanger, a smaller floating tube sheet being used. The standard material list for floating head heat exchanger can be applied. In list 1 both shell side and tube side are assumed to be non-corrosive products. In list 2
39、 both product side and heating medium side are assumed to be non-corrosive. Lists 3 and 4 are intended for non- corrosive products on the shell side and cooling water on the tube side. The materials specified vary from carbon steel to copper alloy depending on the corrosivity of the cooling water. T
40、wo heat exchanger groups with alloy materials are represented in list 5 and 6. List 5 covers heat exchangers of stainless steel grades AISI 304, 321, 316 and list 6 heat exchangers made of Alloy N04400 (Monel 400). In either group different specifications can be distinguished depending on where the
41、alloy material is needed, shell side, tube side or both sides. Only the floating head type has been chosen, but these lists can easily be converted to other types. Three stainless steel grades are combined in list 5 because of similarity, hence in addition to the specification list number the stainl
42、ess steel grade has to be mentioned, e.g. “List 5A-316L“. DEP 31.21.01.31-Gen. November 1989 Page 6 3.BACKGROUND INFORMATION TO ADDITIONAL REQUIREMENTS 3.1GENERAL The material standards specified according to e.g. ASTM do not always completely cover the Shell specifications and engineering philosoph
43、y. Therefore additional requirements have to be attached in some cases. However, the aim is to restrict amendments to code specifications as far as possible and practical. In this issue the number of additional notes has again been reduced. The additional requirements have been summarized in a compr
44、ehensive list to which reference is made, in the appropriate cases, in the material specification lists. This list of notes can be found on page 22. A brief explanation of the notes is given below. Note 1. Note 1 makes reference to the DEP 30.10.02.11-Gen. “Metallic Materials“ and is applicable to a
45、ll items. The latter is a guide to similar and acceptable substitute materials of other standards, such as British Standard, DIN, AFNOR and JIS. Note 2. Most steels according to ASTM specifications allow for carbon contents far above 0.23%. This increases the potential risk of weld cracking. Most st
46、eel manufacturers, however, can satisfy the required lower carbon content as specified in DEP 30.10.60.18-Gen.“ Welding of Metals“. Note 3. Some heat exchangers with fixed tube sheets require bellows in the shell to compensate for thermal expansion. The materials for this special construction shall
47、be specified separately. The use of bellow constructions in pressure containing parts is not encouraged by SIPM. Note 4. It is difficult to clearly define what constitutes corrosive, non-corrosive or mildly-corrosive cooling water and it is advised to consult a materials engineer in case of doubt. G
48、enerally it will be necessary to have the cooling water source evaluated by experts in this field in case no “local“ references are available with respect to material performance. To give some guidance the following examples of each condition are given. Example 1: Non-corrosive cooling water. Coolin
49、g water from a closed or semi-closed treated water system can generally be regarded as non-corrosive. This means that the make-up water for treated water systems is of good quality, e.g. condensate or boiler feed water, that inhibitors are added, the oxygen has been removed and pH is continuously controlled. Example 2: Mildly corrosive cooling water. This condition is more difficult to specify. Local circumstances and experience determine if the material specifications for mildly corrosive cooling water can be followed. Sweet untreated aerated water, e.g. fresh water from a lake, can gener
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