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1、TECHNICAL SPECIFICATION WELDED AND SEAMLESS DUPLEX AND SUPER DUPLEX STAINLESS STEEL LINE PIPE (AMENDMENTS/SUPPLEMENTS TO API SPEC 5LC) DEP 31.40.20.34-Gen. December 1998 DESIGN AND ENGINEERING PRACTICE This document is confidential. Neither the whole nor any part of this document may be disclosed to
2、 any third party without the prior written consent of Shell 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 do
3、cument 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 owners. PREFACE DEP (Design and Engineering Practice) publications reflect the views,
4、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 experience acquired during their inv
5、olvement 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 reference is made to, national and international standards and codes of practice.
6、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 any other such facility, and thereby to achieve maximum technical and economi
7、c 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 locality. The system of DEPs is expect
8、ed 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 and the attainment of the require
9、d 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, the Contractor or Manufacturer/Sup
10、plier 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 companies receiving technical a
11、dvice 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 all respects to the terms and co
12、nditions 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 that tenders for projects, materi
13、als 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 nature for any damage (including
14、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 and/or any company affiliated t
15、o 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 to any company or person whomsoev
16、er 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 DEPs vests in SIOP and SIEP. Use
17、rs 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. NOTE: In addition to DEP publicat
18、ions 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 DEPs are also applicable to Standar
19、d Specifications and DDDs. Standard Specifications and DDDs will gradually be replaced by DEPs. DEP 31.40.20.34-Gen. December 1998 Page 2 TABLE OF CONTENTS PART IINTRODUCTION.6 1.1SCOPE 6 1.2DISTRIBUTION, INTENDED USE AND REGULATORY CONSIDERATIONS6 1.3DEFINITIONS 6 1.4ABBREVIATIONS7 1.5CROSS-REFEREN
20、CES8 1.6INFORMATION TO BE SUPPLIED BY THE PRINCIPAL.8 PART IIAMENDMENTS/SUPPLEMENTS TO API SPEC 5LC.9 SECTION 1 SCOPE 10 1.1COVERAGE 10 1.3REFERENCED STANDARDS.10 1.4RETENTION OF RECORDS.10 1.5MEASURING DEVICES10 1.7CERTIFICATION.10 1.8QUALITY SYSTEM10 SECTION 2 PROCESS OF MANUFACTURE AND MATERIAL11
21、 2.1PROCESS OF MANUFACTURE11 2.2COLD EXPANSION.11 2.3HEAT TREATMENT12 2.5SURFACE FINISH.12 SECTION 3 CHEMICAL PROPERTIES AND TESTS13 3.1COMPOSITION.13 3.2HEAT ANALYSES.13 3.3PRODUCT ANALYSES.13 3.6CHEMICAL ANALYSES PROCEDURES13 SECTION 4 MECHANICAL PROPERTIES AND TESTS.14 4.1MECHANICAL PROPERTIES.14
22、 4.2TENSILE TESTS - GENERAL.14 4.3TENSILE TESTING.14 4.4LONGITUDINAL TENSILE TESTS.14 4.5TRANSVERSE TENSILE TESTS15 4.15GUIDED BEND TEST.15 4.17WELD DUCTILITY TEST FOR ELECTRIC-WELDED PIPE15 4.20HARDNESS TESTS (LC52-1200).15 4.20HARDNESS TESTS15 4.21FRACTURE TOUGHNESS TESTING16 SECTION 5 SPECIAL TES
23、TS.19 5.1FERRITE/AUSTENITE RATIO FOR DUPLEX STAINLESS STEEL19 5.2INTERGRANULAR CORROSION TEST (STRAUSS TEST).19 SECTION 6 HYDROSTATIC TESTS20 6.1INSPECTION HYDROSTATIC TEST.20 6.3TEST PRESSURES20 6.4SUPPLEMENTARY HYDROSTATIC TESTS.20 SECTION 7 DIMENSIONS, WEIGHTS AND LENGTHS21 7.1DIMENSIONS AND WEIG
24、HTS.21 7.2DIAMETER 21 7.3WALL THICKNESS.22 7.5LENGTH 22 7.6STRAIGHTNESS.22 7.7JOINTERS. 22 7.8PIPE ENDS 23 SECTION 8 NON-DESTRUCTIVE INSPECTION.24 8.1INSPECTION METHODS FOR WELDED PIPE.24 8.4RADIOLOGICAL INSPECTION.25 DEP 31.40.20.34-Gen. December 1998 Page 3 8.5FLUOROSCOPIC OPERATOR QUALIFICATION25
25、 8.6OPERATOR CERTIFICATION25 8.7REFERENCE STANDARDS.25 8.9FREQUENCY25 8.10PROCEDURE FOR EVALUATING IN-MOTION OPERATION OF THE FLUOROSCOPE.25 8.11ACCEPTANCE LIMITS.26 8.12IMPERFECTIONS.26 8.13DEFECTS 26 8.15ULTRASONIC AND ELECTROMAGNETIC INSPECTION OF WELDED PIPE 26 8.16ULTRASONIC AND ELECTROMAGNETIC
26、 INSPECTION OF SEAMLESS PIPE. 27 8.17ULTRASONIC INSPECTION OF CENTRIFUGALLY CAST PIPE .27 8.18LIQUID PENETRANT TESTING OF BEVEL FACES.28 8.19PERSONNEL QUALIFICATION28 SECTION 9 WORKMANSHIP, VISUAL INSPECTION AND REPAIR OF DEFECTS.29 9.3WORKMANSHIP.29 9.5DEFECTS 29 9.6REPAIR OF DEFECTS30 9.8PROCEDURE
27、 FOR REPAIR OF WELD SEAMS OF ELECTRIC WELD AND INDUCTION WELDED PIPE.30 9.9PROCEDURE FOR REPAIR OF WELD SEAM OF GAS METAL-ARC WELDED PIPE30 9.10GAUGE PIG. 30 SECTION 10MARKING AND SURFACE TREATMENT.31 10.1MARKING - GENERAL31 10.3SEQUENCE OF MARKINGS31 10.5DIE STAMPING.31 10.6SURFACE TREATMENT31 SECT
28、ION 11HANDLING, STORAGE, PACKAGING,AND DELIVERY.32 11.1HANDLING 32 11.2STORAGE. 32 11.3PACKAGING.32 11.4DELIVERY. 32 SECTION 12DOCUMENTATION.33 12.1LANGUAGE. 33 12.2PRE-MANUFACTURING DOCUMENTATION.33 SECTION 13FIRST-DAY-PRODUCTION TESTS.34 13.1GENERAL 34 13.2NON-DESTRUCTIVE TESTING.34 13.3CHEMICAL C
29、OMPOSITION.34 13.4MECHANICAL TESTING34 13.5SPECIAL TESTS.34 APPENDIX A.SPECIFICATION FOR WELDED JOINTERS 35 A1.METHOD. 35 A2.WORKMANSHIP.35 A3.MARKING 35 A4.NON-DESTRUCTIVE TESTING.35 APPENDIX B.REPAIR WELDING PROCEDURE 36 B.2.REPAIR WELDING PROCEDURE QUALIFICATION36 PART IIIREFERENCES37 DEP 31.40.2
30、0.34-Gen. December 1998 Page 4 APPENDICES APPENDIX 1DETERMINATION OF THE VOLUME FRACTION OF FERRITE IN DUPLEX STAINLESS STEEL BY SYSTEMATIC POINT COUNT40 DEP 31.40.20.34-Gen. December 1998 Page 5 PART IINTRODUCTION 1.1SCOPE This new DEP specifies requirements and gives recommendations for the manufa
31、cture and supply of seamless and longitudinally welded duplex and super duplex stainless steel line pipe for use in oil and gas operations under both sour and non-sour service conditions. NOTE:Sour service is defined in DEP 31.22.20.31-Gen. Part II of this DEP gives amendments and supplements to API
32、 Spec 5LC Second Edition August 1991 (plus Supplement 1, December 1992) which are considered necessary to ensure pipeline integrity in accordance with Shell Group requirements. The clause numbering in Part II of this DEP follows that of API Spec 5LC. Where clauses of API Spec 5LC are not amended or
33、supplemented by this DEP, they shall apply in their entirety. 1.2DISTRIBUTION, INTENDED USE AND REGULATORY CONSIDERATIONS Unless otherwise authorised by SIEP, 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 Contr
34、actors and Manufacturers nominated by them (i.e. the distribution code is “ F” , as described in DEP 00.00.05.05-Gen.). This DEP is primarily intended to be used for oil and/or gas pipelines, flowlines and related facilities. It is intended for use by Exploration and Production, Manufacturing, Chemi
35、cals or Supply/Marketing companies which require the use of line pipe. If national and/or local regulations exist in which some of the requirements may be more stringent than this DEP, the Contractor shall determine by careful scrutiny which of the requirements are the more stringent and which combi
36、nation of requirements will be acceptable as regards safety, environmental, economic and legal aspects. In all cases the Contractor 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 regulati
37、ons. The Principal may then negotiate with the Authorities concerned with the object of obtaining agreement to follow this DEP as closely as possible. 1.3DEFINITIONS 1.3.1General definitions The Contractor is the party which carries out all or part of the design, engineering, procurement, constructi
38、on, commissioning or management of a project, or operation or maintenance of a facility. The Principal may undertake all or part of the duties of the Contractor. The Manufacturer/Supplier is the party which manufactures or supplies equipment and services to perform the duties specified by the Contra
39、ctor. The Principal is the party which initiates the project and ultimately pays for its design and construction. The Principal will generally specify the technical requirements. The Principal may also include an agent or consultant authorised to act for, and on behalf of, the Principal. The word sh
40、all indicates a requirement. The word should indicates a recommendation. DEP 31.40.20.34-Gen. December 1998 Page 6 1.3.2Specific definitions Defect (in NDT)An imperfection or group of imperfections whose indication(s) do not meet specified acceptance limits. Electric-weldedTerm used in API Spec 5LC
41、which shall be understood to mean HFW. Finished pipePipe passed through all stages of production and inspection. Imperfection (in NDT)An interruption, which may be either intentional or unintentional, in the physical structure or configuration of a pipe. Indication (in NDT)Evidence of an imperfectio
42、n that requires interpretation to determine its significance. LotA unit of pipes from the same heat and, for batch heat treatment, heat treatment batch, having the same dimensions. For pipes with OD 32T - 300 DEP 31.40.20.34-Gen. December 1998 Page 16 The acceptance criteria fof 10 x 10 transverse t
43、est pieces shall be as follows: MaterialMinimum AverageMinimum singleIndividual Shear Jtest piece from theArea set% minimum J 22 Cr DSS705350 25 Cr SDSS1007550 For other specimens, the following factors shall be applied to the acceptance criteria: SizeOrientationFactor mm 10 x 10Longitudinal1.5 10 x
44、 7.5Transverse0.8 10 x 7.5Longitudinal1.2 10 x 5Transverse0.5 10 x 5Longitudinal0.8 4.21.2Charpy retests Where tests fail to meet the specified requirements, the sampled pipe shall be rejected. Two further pipes from the lot shall then be tested. The results for both of these further tests shall be
45、satisfactory without recourse to retesting. Should one or both pipes be unsatisfactory, the lot of pipes shall be rejected. DEP 31.40.20.34-Gen. December 1998 Page 17 Figure 4.9Location of Charpy V-notch for different weld configurations in pipe of wall thickness 20 mm DEP 31.40.20.34-Gen. December
46、1998 Page 18 SECTION 5 SPECIAL TESTS 5.1FERRITE/AUSTENITE RATIO FOR DUPLEX STAINLESS STEEL Delete this section and replace with the following: The percentage of ferrite phase shall be determined on one test piece from each end of each of the first-day-production test pipes and one test piece from on
47、e pipe representing each lot. The test pieces shall be extracted from the sample(s) removed for mechanical acceptance tests at a location around the pipe circumference agreed with the Principal. For longitudinally welded pipe, the test piece shall contain the full cross-section of the longitudinal w
48、eld. The ferrite content shall be measured 1 mm from both the internal and external surfaces and be reported for the parent material, weld metal and the parent material within 0.2 mm of the FL, as relevant to the method of manufacture. Measurement of ferrite content shall be in accordance with (Appe
49、ndix 1). Original photomicrographs shall be included in the inspection documents. The ferrite content shall be in the range 40 - 60% for parent material and HAZ and 30-60% for weld metal. The microstructure shall be considered acceptable if it displays a uniform ferrite and austenite phase distribution and freedom from third phase precipitates. 5.2INTERGRANULAR CORROSION TEST (STRAUSS TEST) Delete this section including items a), b), c), d), e), and f). DEP 31.40.20.34-Gen. December 1998 Page 19 SECTION 6 HYDROSTATIC TESTS 6.1INSPECTION HYDROSTATIC TEST Delete the second sentence and repla