1、External Fusion Bonded Epoxy Coating of Line PipeAPI RECOMMENDED PRACTICE 5L9FIRST EDITION, DECEMBER 2001REAFFIRMED, MAY 2015External Fusion Bonded Epoxy Coating of Line PipeUpstream SegmentAPI RECOMMENDED PRACTICE 5L9FIRST EDITION, DECEMBER 2001REAFFIRMED, MAY 2015SPECIAL NOTESAPI publications nece
2、ssarily address problems of a general nature. With respect to partic-ular circumstances, local, state, and federal laws and regulations should be reviewed.API is not undertaking to meet the duties of employers, manufacturers, or suppliers towarn and properly train and equip their employees, and othe
3、rs exposed, concerning healthand safety risks and precautions, nor undertaking their obligations under local, state, or fed-eral laws.Information concerning safety and health risks and proper precautions with respect to par-ticular materials and conditions should be obtained from the employer, the m
4、anufacturer orsupplier of that material, or the material safety data sheet.Nothing contained in any API publication is to be construed as granting any right, byimplication or otherwise, for the manufacture, sale, or use of any method, apparatus, or prod-uct covered by letters patent. Neither should
5、anything contained in the publication be con-strued as insuring anyone against liability for infringement of letters patent.Generally, API standards are reviewed and revised, reafrmed, or withdrawn at least everyve years. Sometimes a one-time extension of up to two years will be added to this review
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8、. Questions concerning the interpretation of the content of this standard or com-ments and questions concerning the procedures under which this standard was developedshould be directed in writing to the standardization manager, American Petroleum Institute,1220 L Street, N.W., Washington, D.C. 20005
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13、t 2001 American Petroleum InstituteFOREWORDAPI publications may be used by anyone desiring to do so. Every effort has been made bythe Institute to assure the accuracy and reliability of the data contained in them; however, theInstitute makes no representation, warranty, or guarantee in connection wi
14、th this publicationand hereby expressly disclaims any liability or responsibility for loss or damage resultingfrom its use or for the violation of any federal, state, or municipal regulation with which thispublication may conict.Suggested revisions are invited and should be submitted to the standard
15、ization manager,American Petroleum Institute, 1220 L Street, N.W., Washington, D.C. 20005.vCONTENTSPage1 SCOPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.1 Description . . . . . . . . . . . . . . . . . . . . . . .
16、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.2 Denitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.3 Referenced Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17、 . . . 11.4 Retention of Records . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 COATING MATERIAL REQUIREMENTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.1 Purpose. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
18、 . . . . . . . . . . . . . . . . . . . . . . . . . . 12.2 Coating Materials Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.3 Traceability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.4 C
19、oating Supplier Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22.5 Certication of Physical Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 COATING MATERIAL QUALIFICATION. . . . . . . . . . . . . . . . . . . . . . . .
20、 . . . . . . . . . 23.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23.2 Preparation of Laboratory Coated Test Specimens. . . . . . . . . . . . . . . . . . . . . . . . 23.3 Epoxy Material Mechanical Properties and Tests.
21、 . . . . . . . . . . . . . . . . . . . . . . . . 34 APPLICATOR PRACTICES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34.1 Plant Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34.2 Receip
22、t of Pipe. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34.3 Handling of Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34.4 Coating of Material Selection . . . . . . . . . . . . . . .
23、. . . . . . . . . . . . . . . . . . . . . . . . . 34.5 Handling of Coating Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34.6 Designated Quality Control Responsibility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34.7 Inspector Notication . . .
24、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 APPLICATION PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45.1 Purpose. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
25、 . . . . . . . . . . . . 45.2 Surface Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45.3 Coating Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 PRODUCTION INSPECTION AND DOCU
26、MENTATION . . . . . . . . . . . . . . . . . . . . 56.1 Purpose. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56.2 Working Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
27、. 66.3 Visual Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66.4 Thickness Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66.5 Holiday Inspection. . . . . . . . . . . . . . . .
28、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66.6 Documentation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 REPAIR OF COATING DEFECTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67.1
29、 Repairs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67.2 Preparation of Repair Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67.3 Pinholes and Small Area Repairs . . . . . . . . . . .
30、. . . . . . . . . . . . . . . . . . . . . . . . . . 67.4 Large Area Repairs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 PRODUCTION ACCEPTANCE TESTING AND DOCUMENTATION. . . . . . . . . . 78.1 Testing Frequency . . . . . . . . . . . . . . . . . .
31、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78.2 Production Test Rings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7viiPage8.3 Flexibility Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
32、. . . . . . . 78.4 Cathodic Disbondment Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78.5 Hot Water Soak Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78.6 Microscopic Examination . . . . . . . . . . . .
33、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78.7 Retest of Type A or Type B Failures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78.8 Stripping and Recoating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 COATIN
34、G STENCIL REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79.1 Location of Coating Stencils . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79.2 Information Required. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
35、. . . . . . . . . . . . . . 89.3 Restenciling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 810 HANDLING, STORAGE AND SHIPPING OF COATED PIPE. . . . . . . . . . . . . . . . . 810.1 Handling. . . . . . . . . . . . . . . . . . . . . . . . .
36、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 810.2 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 810.3 Shipping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
37、. . . . . . . . . . . . 9APPENDIX A SPECIFIC GRAVITY DETERMINATION . . . . . . . . . . . . . . . . . . . . . . 11APPENDIX B GET TIME DETERMINATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13APPENDIX C GLASS TRANSITION AND HEAT OF REACTION DETERMINATION FOR COATING MATERIALS (POW
38、DERS). . . 15APPENDIX D MOISTURE ANALYSIS DETERMINATION . . . . . . . . . . . . . . . . . . . 17APPENDIX E PERCENT TOTAL VOLATILE ANALYSIS BY MASS. . . . . . . . . . . 19APPENDIX F ABRASION TEST METHOD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21APPENDIX G 24-HOUR CATHODIC DIS
39、BONDMENT TEST . . . . . . . . . . . . . . . . . 23APPENDIX H CHEMICAL RESISTANCE TEST. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27APPENDIX I FLEXIBILITY TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29APPENDIX J IMPACT TESTING . . . . . . . . . .
40、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31APPENDIX K MICROSCOPIC EXAMINATION FOR POROSITY AND VISIBLE INTERFACIAL CONTAMINATION UNDER FUSION-BONDED EPOXY PIPELINE COATINGS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33APPENDIX L HOT WATER SOAK TEST . . . . . .
41、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35Figures1 DSC Scan on Coating Material with Conditioning Run . . . . . . . . . . . . . . . . . . . . 162 DSC Scan on Coating Material with No Conditioning Run . . . . . . . . . . . . . . . . . 163 Cathodic Disbondment Test Set Up for Pipe Rin
42、g Samples . . . . . . . . . . . . . . . . . 244 Schematic of Apparatus for Cathodic Disbondment Test . . . . . . . . . . . . . . . . . . . 255 Effective Strap Thickness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 296 Four Point Bend. . . . . . . . . . . .
43、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 307 Examples of Cross-section Porosity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 338 Examples of Interface Porosity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
44、 . . 339 Interfacial Contamination Comparison Charts. . . . . . . . . . . . . . . . . . . . . . . . . . . . 34Tables1 Referenced Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Coating Material Physical Properties . . . . . . . . . . . . .
45、 . . . . . . . . . . . . . . . . . . . . . . . 23 Performance of Laboratory Coated Steel Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Performance of Coating Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 Production Test Ring Requirements .
46、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8viii1External Fusion Bounded Epoxy Coating of Line Pipe1 Scope1.1 DESCRIPTIONThis recommended practice provides external fusionbonded epoxy coating of line pipe for use in transportationpipelines. The Recommended Practice is l
47、imited to the appli-cation of external coatings on pipe prior to installation. Theremay exist differences in the surface condition of pipes pro-duced by the various pipe making processes permitted underthe latest editions of API standards. Surface conditions maypreclude the coating of such pipe.The
48、applicator shall be responsible for assuring compli-ance with all of the provisions of this practice however, thePurchaser may make any investigation necessary to satisfyhimself of compliance by the applicator.1.2 DEFINITIONS1.2.1 applicator:The organization responsible to thePurchaser for the appli
49、cation of the coating.1.2.2 batch: The quantity of material produced during acontinuous production run of not more than one calendar day.1.2.3 coating: The lm of coating as applied to the sub-strate.1.2.4 coating material: The material prior to applicationto the substrate.1.2.5 holiday:A discontinuity in a protective coatingwhich exhibits electrical conductivity when exposed to a spe-cic voltage.1.2.6 inspector: An authorized agent of the purchaser.1.2.7 may:May indicates that a provision is optional.1.2.8 purchaser:The owner company or the authorizedagency that buys the applie
