NACE-SP0208-2008.pdf
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1、 Standard Practice Internal Corrosion Direct Assessment Methodology for Liquid Petroleum Pipelines This NACE International standard represents a consensus of those individual members who have reviewed this document, its scope, and provisions. Its acceptance does not in any respect preclude anyone, w
2、hether he or she has adopted the standard or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not in conformance with this standard. Nothing contained in this NACE International standard is to be construed as granting any right, by implication or otherwise,
3、 to manufacture, sell, or use in connection with any method, apparatus, or product covered by Letters Patent, or as indemnifying or protecting anyone against liability for infringement of Letters Patent. This standard represents minimum requirements and should in no way be interpreted as a restricti
4、on on the use of better procedures or materials. Neither is this standard intended to apply in all cases relating to the subject. Unpredictable circumstances may negate the usefulness of this standard in specific instances. NACE International assumes no responsibility for the interpretation or use o
5、f this standard by other parties and accepts responsibility for only those official NACE International interpretations issued by NACE International in accordance with its governing procedures and policies which preclude the issuance of interpretations by individual volunteers. Users of this NACE Int
6、ernational standard are responsible for reviewing appropriate health, safety, environmental, and regulatory documents and for determining their applicability in relation to this standard prior to its use. This NACE International standard may not necessarily address all potential health and safety pr
7、oblems or environmental hazards associated with the use of materials, equipment, and/or operations detailed or referred to within this standard. Users of this NACE International standard are also responsible for establishing appropriate health, safety, and environmental protection practices, in cons
8、ultation with appropriate regulatory authorities if necessary, to achieve compliance with any existing applicable regulatory requirements prior to the use of this standard. CAUTIONARY NOTICE: NACE International standards are subject to periodic review, and may be revised or withdrawn at any time in
9、accordance with NACE technical committee procedures. NACE International requires that action be taken to reaffirm, revise, or withdraw this standard no later than five years from the date of initial publication and subsequently from the date of each reaffirmation or revision. The user is cautioned t
10、o obtain the latest edition. Purchasers of NACE International standards may receive current information on all standards and other NACE International publications by contacting the NACE International First Service Department, 1440 South Creek Dr., Houston, Texas 77084-4906 (telephone +1 281-228-6200
11、). Approved 2008-11-07 NACE International 1440 South Creek Dr. Houston, Texas 77084-4906 +1 281-228-6200 ISBN 1-57590-221-4 2008, NACE International NACE SP0208-2008 Item No. 21127 Copyright NACE International Provided by IHS under license with NACELicensee=Boeing Co/5910770001 Not for Resale, 01/31
12、/2009 02:01:33 MSTNo reproduction or networking permitted without license from IHS -,-,- SP0208-2008 NACE International i _ Foreword This standard practice formalizes a methodology termed liquid petroleum internal corrosion direct assessment (LP-ICDA) that can be used to help ensure pipeline integri
13、ty. The methodology is applicable to pipelines that are normally fully packed with petroleum compound(s) existing in an incompressible liquid state under normal pipeline operating conditions, with basic (or bottom) sediment and water (BS however, the method is not limited to unpiggable pipelines. Th
14、is standard was prepared by Task Group (TG) 315 on Pipelines (Liquid Petroleum): Internal CorrosionDirect Assessment. TG 315 is administered by Specific Technology Group (STG) 35 on Pipelines, Tanks, and Well Casings. This standard is issued by NACE International under the auspices of STG 35. In NAC
15、E standards, the terms shall, must, should, and may are used in accordance with the definitions of these terms in the NACE Publications Style Manual. The terms shall and must are used to state a requirement, and are considered mandatory. The term should is used to state something good and is recomme
16、nded, but is not considered mandatory. The term may is used to state something considered optional. _ Copyright NACE International Provided by IHS under license with NACELicensee=Boeing Co/5910770001 Not for Resale, 01/31/2009 02:01:33 MSTNo reproduction or networking permitted without license from
17、IHS -,-,- SP0208-2008 ii NACE International _ NACE International Standard Practice Internal Corrosion Direct Assessment Methodology for Liquid Petroleum Pipelines Contents 1. General . 1 2. Definitions . 8 3. Pre-Assessment . 9 4. Indirect Inspection . 11 5. Detailed Examinations 16 6. Post Assessme
18、nt 18 7. LP-ICDA Records . 18 References 19 Appendix A: Determination of Water Accumulation (Nonmandatory) 22 Appendix B: Determination of Wettability (Nonmandatory) 28 Appendix C: Determination of Solids Accumulation (Nonmandatory) 28 Appendix D: Corrosion Rate Models (Nonmandatory) . 31 FIGURES Fi
19、gure 1: Pre-Assessment Step 3 Figure 2: Indirect Inspection Step . 4 Figure 3: Detailed ExaminationSite Selection . 5 Figure 4: Detailed Examination Step 6 Figure 5: Post-Assessment Step 7 Figure A1: Schematic representation of the stratified oil-water flow 25 Figure C1: Schematic presentation of th
20、ree-layer model and forces acting on a representative particle at the interface between the two bed layers . 29 TABLES Table 1: Typical Data for Use of LP-ICDA Methodology 10 _ Copyright NACE International Provided by IHS under license with NACELicensee=Boeing Co/5910770001 Not for Resale, 01/31/200
21、9 02:01:33 MSTNo reproduction or networking permitted without license from IHS -,-,- SP0208-2008 NACE International 1 _ Section 1: General 1.1 Introduction 1.1.1 This standard is intended to serve as a guide for applying the NACE LP-ICDA process to liquid petroleum pipeline systems. 1.1.2 The primar
22、y purposes of the LP-ICDA method are (1) to enhance the assessment of internal corrosion in liquid petroleum pipelines, and (2) to improve pipeline integrity. 1.1.3 The LP-ICDA methodology assesses the likelihood of internal corrosion and includes existing methods of examination available to a pipel
23、ine operator to determine whether internal corrosion is actually present or may occur. This methodology may be incorporated into corrosion integrity and risk management plans. 1.1.4 LP-ICDA uses flow modeling results and provides a framework to utilize those methods. 1.1.5 LP-ICDA was developed for
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