1、Recommended Practice for Unprimed Internal Fusion Bonded Epoxy Coating of Line PipeAPI RECOMMENDED PRACTICE 5L7SECOND EDITION, JUNE 1988REAFFIRMED, MAY 2015Recommended Practice for Unprimed Internal Fusion Bonded Epoxy Coating of Line PipeUpstream SegmentAPI RECOMMENDED PRACTICE 5L7FOURTH EDITION, J
2、UNE 1988REAFFIRMED, MAY 2015RP 5L7: Unprimed Internal Fusion Bonded Epoxy Coating of Line Pipe 3 POLICY I (a) API PUBLICATIONS NECESSARILY ADDRESS PROBLEMS OF A GENERAL NATURE. WITH RESPECT TO PARTICULAR CIRCUMSTANCES, ULATIONS SHOULD BE REVIEWED. (b) API IS NOT UNDERTAKING TO MEET DUTIES PLIERS TO
3、WARN AND PROPERLY TRAIN AND POSED, CONCERNING HEALTH AND SAFETY RSKS AND PRECAUTIONS, NOR UNDERTAKING THEIR OBLIGATIONS UNDER LOCAL, STATE, OR FEDERAL LAWS. LOCAL, STATE AND FEDERAL LAWS AND REG- OF EMPLOYERS, MANUFACTURERS OR SUP- EQUIP THEIR EMPLOYEES, AND OTHERS EX- (c) NOTHING CONTAINED IN ANY A
4、PI PUBLI- CATION IS TO BE CONSTRUED AS GRANTING ANY RIGHT, BY IMPLICATION OR OTHERWISE, FOR THE MANUFACTURE, SALE, OR USE OF ANY METHOD, APPARATUS, OR PRODUCT COVERED BY LETTERS PATENT. NEITHER SHOULD ANYTHING CONTAINED IN THE PUB- LICATION BE CONSTRUED AS INSURING MENT OF LETTERS PATENT. (d) GENERA
5、LLY, API STANDARDS ARE REVIEWED AND REVISED, REAFFIRMED, OR WITHDRAWN AT LEAST EVERY FIVE YEARS. TWO YEARS WILL BE ADDED TO THIS REVIEW CYCLE. THIS PUBLICATION WILL NO LONGER BE IN EFFECT FIVE YEARS AFTER ITS PUBLI- ARD OR, WHERE AN EXTENSION HAS BEEN GRANTED, UPON REPUBLICATION. STATUS OF THE PUBLI
6、CATION CAN BE ASCERTAINED FROM ANYONE AGAINST LIABILITY FOR INFRINGE- SOMETIMES A ONE-TIME EXTENSION OF UP TO CATION DATE AS AN OPERATIVE API STAND- THE API AUTHORING DEPARTMENT (TEL. 214- 220-9111). A CATALOG OF API PUBLICATIONS AND MATERIALS IS PUBLISHED ANNUALLY AND UPDATED QUARTERLY BY API, 1220
7、 L ST., N.W., WASHINGTON, D.C. 20005. 4 0732290 OOOL941 5 I RP 5L7-BB - 4 American Petroleum Institute FOREWORD (a) This Recommended Practice was prepared by a Formulating Committee which included representatives of pipeline operators and line pipe manufacturers and advisors from coating manufacture
8、rs and coating appli- cators as well as other interested individuals. (b) The purpose of this Recommended Practice is to present methods for qualifying coating materiais, pro- duction application of such materiais, and final accept- ance tests of coated pipe for internally corrosive conditions, a (c
9、) While the coating system described in this docu- ment is intended to provide a high degree of corrosion protection, the user is cautioned that operating condi- tions as well as the chemical nature of the product to be transported can affect the performance of the coating, and additional anti-corro
10、sion methods, such as inhibi- tors, may also be warranted. (d) American Petroleum Institute (API) Recommended I Practices are published to facilitate the broad availabil- I ity of proven, sound engineering and operating prac- tices. These Recommended Practices are not intended to obviate the need fo
11、r applying sound judgment as to when and where these Recommended Practices should be utilized. (e) The formulation and publication of API Recom- mended Practices is not intended to, in any way, inhibit anyone from using any other practices, (f) Any Recommended Practice may be used by anyone desiring
12、 to do so, and diligent effort has been made by API to assure the accuracy and reliability of the data contained therein. However, the Institute makes no representation, warranty, or guarantee in connection with the publication of any Recommended Practice and hereby expressly disclaims any liability
13、 or responsibil- ity for loss or damage resulting from their use, for any violation of any federal, state, or municipal regulation with which an API recommendation may conflict, or for the infringement of any patent resulting from the use of this publication. Attention Users: Portions of this public
14、ation have been changed from the previous edition. The locations of changes have been marked with a bar in the margin, as shown to the left of this paragraph. In some cases the changes are significant, while in other cases the changes reflect minor editorial adjustments. The bar notations in the mar
15、gins are provided as an aid to users as to those parts of this publication that have been changed from the previous edition, but API makes no warranty as to the accuracy of such bar notations. RP 5L7: Unprimed Internal Fusion Bonded Epoxy Coating of Line Pipe 5 SECTION 1 SCOPE 1.0 SCOPE This Recomme
16、nded Practice provides for UN- PRIMED INTERNAL FUSION BONDED EPOXY COATING OF LINE PIPE for use in transportation pipelines in the petroleum industry. The recommendation provided herein covers: a. Section i Scope Section 2 Coating Material Specification Section 3 Laboratory Coating Testing Section 4
17、 Application Practices Section 5 Production Inspection and Acceptance Procedures Within this Recommended Practice: 1) “Shall” is used to indicate that a provision is mandatory. 2) “Should” is used to indicate that a provision is not mandatory, but recommended as good prac- tice. 3) “May” is used to
18、indicate that a provision is optional. b. The Recommended Practice is limited to the application of internal coatings on unused pipe prior to installation. It should be recognized that there may exist differences in the surface condi- tion of pipe produced by the various pipemaking processes permitt
19、ed under the latest editions of API standards. Surface conditions may preclude the coating of such pipe. c. It is intended that the Applicator be responsible for assuring compliance with all of the provi- sions of this practice; however, the Purchaser may make any investigation necessary to satisfy
20、himself of compliance by the Applicator. 1.1 DEFINITIONS 1.1.1 Applicator The “Applicator” is the organization respon- sible to the Purchaser for the application of the coating. A “Batch” is defined as the quantity of mate- rial produced during a continuous production run of not more than 8 hours. 1
21、.1.2 Batch 1.1.3 Coating “Coating” indicates the film of coating as applied to the substrate. 1.1.4 Coating Material “Coating Material” indicates the material prior to application to the substrate. 1.1.5 Holiday A “Holiday” is a discontinuity in a protective coating which exhibits electrical conduct
22、ivity when exposed to a specific voltage. The authorized agent of the purchaser. The “Purchaser” is the owner company or the authorized agency that buys the coated pipe. The “Supplier” is the manufacturer and/or distributor of the coating material and its authorized technician. 1.1.6 Inspector 1.1.7
23、 Purchaser 1.1.8 Supplier 1.2 GENERAL 1.2.1 Coating Supplier Information I The coating material Supplier shall furnish to the Purchaser and/or Applicator the following information in written form upon request. a. Specifications of the basic material prop- erties and laboratory test results of the co
24、ating materiaI(s) and coating($ The basic material properties shall be within the ranges permitted in Section 2 of this Recommendation. The laboratory test re- sults of the coating shall be within the ranges permitted in Section 3. coating materials. ments of Table 2.3. b. Directions for handling an
25、d storing of the c. Certification of compliance to the require- d. Infrared “analysis” of the coating material (See Appendix 1). 1.3 REFERENCED STANDARDS 1.3.1 General This specification includes by reference, either in total OP in part, other API, industry and government standards listed in Table 1
26、.0. Requirements of other standards included by reference in this specification are essential to the safety and interchangeability of the equip- ment produced. Other nationally or internationally recognized standards shall be submitted to and approved by API for inclusion in this specification prior
27、 to their use as equivalent standards. 1.3.2 Requirements 1.3.3 Equivalent Standards RP 5L7-88 0732290 0001943 9 E-. 6 American Petroleum Institute TABLE 1.0 REFERENCED STANDARDS 1. NACE TM-01-75: Nace Viwial Latest 5. ASTM D1002: Test Method for Latest 2. SSPC-Vis 1-82T Pictoi-ia1 Surface Latest ti
28、es of Adhesives ifi ing (Metal to Metal) St and ard Edition Strength Proper- Edition SP5: Preparatioti Stand- Edition Shear by Tetisimi Load- ards for Paintiiig Steel Szirfaces 6. ASTMG17: Test Method for Latest Preparation Stand- Edition ance of Pipeline Coat- ards for Painting Steel Surf aces 7. A
29、STMB117: Method of Salt Spray Latest 8. NACE TM 01-70: Latest Steel Stmetiires bu Edition Organic, Inorganic and Metallic Coatings; Preparation and Test- ing of Siufaces 3. SIS 05-59-00 SA3: Pictorial Surface Latest Penetratim Resist- Edition ings (Blunt Rod) (Fog) Testing Edition Edition 4. DIN 559
30、28-Part 4: Corrosion Proteetimi of Latest SECTION 2 COATING MATERIAL SPECIFICATION 2.1 PURPOSE This Section describes material properties of coat- ing materials to be applied under the intent of this Recommended Practice. It is the Suppliers respon- sibility to perform the tests referenced in this S
31、ec- tion. The Purchaser or Applicator may also per- form any or all of the referenced tests as part of a quality assurance program. 2.2 COATING MATERIAL The coating material shall consist of a one- component, powdered, fusion-blended material con- sisting of epoxy resin(s), curing agent(s), pigment(
32、$, filler(s), catalyst(s), and flow control agent($ which, when applied to the preheated substrate, will melt, flow, and subsequently cure to produce a coating complying with the requirements of this Recom- mended Practice. 2.3 COATING MATERIAL PROPERTIES Property Value/Limits Test Method Specific G
33、ravity (1) f0.05 g/cc Appendix 2 Particle size Shelf Life (L2) Appendix 3 Gei Time (1) +20% Appendix 4 0.1% max. retained on 60 mesh (250 micron) Cure Cycle Capable of cure at temperature below 500 F (1) 260 Cl (3) for Time: (1) Glass Transition temperature (1) Appendix 5 Potential Reaction Energy (
34、1) Appendix 5 Moisture Content (4) 0.50% maximum Appendix 6 Total Volatile Content (4) 0.6% maximum Appendix 7 (1) per suppliers specification (2) per suppliers recommended storage conditions (3) limitation imposed by regulations on heating of cold (4) either Moisture or Total Volatile Content may b
35、e expanded pipe determined at suppliers discretion. RP 5L7: Unprimed Internal Fusion Bonded Epoxy Coating of Line Pipe 7 SECTION 3 LABORATORY COATING TESTING 3.1 PURPOSE This Section describes laboratory tests required to qualify coating materials. It is the responsibility of the Purchaser and/or co
36、ating Applicator to qualify the coating material prior to production. Once qual- ification is established, further qualification testing is not required unless the coating material or for- mulation changes. The Supplier shall certify to the Applicator and/or Purchaser the results of tests performed
37、under Section 3 for each qualified material. I I 3.2 PERFORMANCE TESTING STEEL PANELS Test panels shall be mild steel. Panel dimensions for each test are given in the referenced test method. Unless otherwise agreed upon between the Supplier and the Purchaser and/or Applicator, the surface shall be b
38、last cleaned using steel grit (G40, HRC 50-55) to any of the following standards: a. NACE No. 1 white metal finish in accordance b. Steel Structures Painting Council SSPC-Vis 1- c. Swedish Pictorial Standard SIS 05- 59-00 SA3 d. DIN 55928 PART 4. I with NACE Visual Standard TM-01-75. 82T SP5. The su
39、rface profile shall be 1.5 to 4.0 mils 38 to i00 microns, measured from peak to trough. 3.3 COATING OF TEST PANELS 3.3.1 Coating application and curing shall be in accordance with the Suppliers iecommenda- tions. I 3.3.2 Thickness of coating on the completed test panel shall be 14 f 2 mils 356 t- 51
40、 microns, measured by a coating thickness gauge cali- brated per Par. 5.3.2.4. 3.4 PERFORMANCE OF LABORATORY COATED STEEL PANELS 3.4.1 Testing The following tests shall be performed on test panels which have been prepared and coated in accordance with the above procedure. Tests shall be performed on
41、 duplicate panels. A coating shall be considered qualified when the results of both test panels meet the accept- ance criterion for each test. 0 3.4.2 Additional Tests At the option of the Purchaser or Applicator, additional qualification tests may be specified. Test Value/Limits Test Method Abrasio
42、n 20 mg max. Appendix 8 5000 psi r34.5 MPa min, or 2500 psi 17.2 MPa min. (The 2500 psi minimum applies only when Appendix 9 Test Method is used.) ASTM D1002 or Appendix 9. Au toclave Free of blisters, cracks, delaminations, or other defects exposing the steel substrate to corrosive media. Appendix
43、10 Cathodic Disbondment* Appendix 11 Chemical Resistance Appendix 12 Flexibility 3.75“/PD bend at O P -18 Cl Appendix 13 I Hot Water Soak Maximum: Rating 3 Appendix 16 Impact 15 in.-lb 1.705, minimum Appendix 14 Penetration Less than 10% ASTM G17 at 200 F 0.31 in. 8 mm maximum average radius 90 days
44、 at 73 no loss of adhesion ASTM B117 for 1000 hr *This is included as an adhesion test, not a service simulation. RP 5L7-88 # 0732290 000194 2 I- E 8 American Petroleum Institute SECTION 4 APPLICATIOW PRACTICES 4.1 PURPOSE This Section prescribes equipment and practices used in the surface preparati
45、on of line pipe for internal fusion bonded epoxy coating and the appli- cation of this coating on the prepared surface. 4.2 GENERAL 4.2.1 Applicator The Applicator is responsible for the quality control production tests outlined in Section 5 to ensure conformance with this Recom- mended Practice. Th
46、e Inspector shall have free access at all times to all parts of the application site which concern the internal coating of the pipe, while work on the contract of the Purchaser is being performed. 4.2.3 Coating Material 4.2.3.1 Selection 4.2.2 Plant Access By agreement between the Purchaser and Appl
47、icator, a list of coating mate- rials previously qualified by either the Purchaser or Applicator under Sections 2 and 3 shall be prepared. The Applicator and/or Purchaser shall then choose the coating material to be applied from this list subject to bid- ding restrictions. Approval or selec- tion of
48、 the coating materials shall be done far enough in advance (prefera- bly not less than 30 days) to provide material at the scheduled start of the work. Selection of alternate coating materials from the approved list may be made at any time by agreement between the Purchaser and the Appli- cator. 4.2
49、.3.2 Batch Samples It shall be the right of the Purchaser or Applicator to procure a coating material batch sample prior to or during the job for the purpose of veri- fication of conformance to coating material specifications. 4.3 HANDLING OF PIPE Pipe shall be handled in a manner to prevent dam- age to pipe walls, beveled ends, and coating. Pipe that is damaged by the coating and handling opera- tions shall be repaired in compliance with the latest editions of applicable API standards, or replaced, at the Applicators expense. 4.4 HANDLING OF COATING MATERIALS 4.4.1 Coa
