1、 Standard Practice Application, Performance, and Quality Control of Plant-Applied Single-Layer Fusion-Bonded Epoxy External Pipe Coating This NACE International standard represents a consensus of those individual members who have reviewed this document, its scope, and provisions. Its acceptance does
2、 not in any respect preclude anyone, whether 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 a
3、ny right, by implication or otherwise, 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 i
4、n no way be interpreted as a restriction 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 responsi
5、bility for the interpretation or use of 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 individ
6、ual volunteers. Users of this NACE International 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 addr
7、ess all potential health and safety problems 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 envir
8、onmental protection practices, in consultation 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 b
9、e revised or withdrawn at any time in accordance with NACE technical committee procedures.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 reaffirmatio
10、n or revision. The user is cautioned to 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 FirstService Department, 15835 Park Ten Place, Houston, TX 770
11、84-5145 (telephone +1 281-228-6200). Revised 2013-10-04 Revised 2002-02-17 Approved October 1994 NACE International 15835 Park Ten Place Houston, Texas 77084-5145 +1 281-228-6200 ISBN 1-57590-146-3 2013, NACE International NACE SP0394-2013 (formerly RP0394) Item No. 21064 SP0394-2013 NACE Internatio
12、nal i _ Foreword This NACE International standard practice presents guidelines for establishing requirements to ensure proper application and performance of plant-applied single -layer fusion-bonded epoxy (FBE) coatings to the external surfaces of carbon steel pipe. It is intended for use by corrosi
13、on control personnel concerned with mitigation of corrosion on buried and submerged piping used for transportation and storage of oil, gas, water, and similar products. This NACE standard was originally prepared in 1994 by NACE Task Group (TG) T-10D-10, a component of Unit Committee T-10D, “Protecti
14、ve Coating Systems. “ It was revised in 2002 and 2013 by NACE TG 031 (formerly TG T-10D-10), “Pipeline Coating Plant-Applied Single Layer Fusion-Bonded Epoxy: Review of NACE Standard RP0394,” administered by Specific Technology Group (STG) 03, “Protective Coatings and Linings Immersion/Buried.” It i
15、s sponsored by STG 05, “Cathodic/Anodic Protection”; and STG 35, “Pipelines, Tanks, and Well Casings.” This standard is published by NACE under the auspices of STG 03. In NACE standards, the terms shall, must, should, and may are used in accordance with the definitions of these terms in the NACE Pub
16、lications 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 recommended, but is not considered mandatory. The term may is used to state something considered optional. _ SP0394-2013 ii NACE Inte
17、rnational _ Application, Performance, and Quality Control of Plant-Applied Single-Layer Fusion-Bonded Epoxy External Pipe Coating Contents 1. General 1 2. Definitions 1 3. Coating Materials 1 4. Production . 4 5. Coating Application . 6 6. Production Inspection and Testing 6 7. Repair 10 8. Handling
18、, Storage, and Shipping 10 9. Marking 11 References 11 Appendix A: Specific Gravity Determination 13 Appendix B: Shelf Life Determination 14 Appendix C: Gel Time Determination 15 Appendix D: Glass Transition and Heat of Reaction Determination . 16 Appendix E: Moisture Analysis Determination 17 Appen
19、dix F: Cathodic Disbondment Test 18 Appendix G: Test for Porosity of the Coating. 20 Appendix H: Flexibility Test 21 Appendix I: Impact Test 27 Appendix J: Hot-Water Soak . 28 Appendix K: Test for Interface Contamination of the Coating . 30 Appendix L: Particle Size Analysis . 31 Appendix M: Total V
20、olatile/Moisture of the Epoxy Powder Mass Loss . 31 Appendix N: Cathodic Disbondment of Strained Coating . 32 Figures Figure G1: Examples of Cross-Section Porosity . 20 Figure G2: Examples of Interface Porosity . 21 Figure H1: Determination of Effective Strap Thickness 22 Figure H2: Radii in 3.18 mm
21、 (0.125 in) Increments. . 24 Figure H3: Radii in 3.18 mm (0.125 in) Increments. . 25 Figure H4: Radii in 3.18 mm (0.125 in) Increments. . 26 Figure H5: Radii in 3.18 mm (0.125 in) Increments. . 27 Tables Table 1: Epoxy Powder Properties 2 Table 2: FBE Coating Qualities 3 Table 3: Production Test Rin
22、g Requirements . 7 Table 4: In-Plant Verification of Epoxy Powder Quality 8 _ SP0394-2013 NACE International 1 _ Section 1: General 1.1 This standard presents guidelines for establishing the minimum requirements to ensure proper application and performance of plant-applied single-layer fusion-bonded
23、 epoxy (FBE) coatings to the external surfaces of pipe. 1.2 The function of such coatings is to prevent corrosion when used in conjunction with cathodic protection. 1.3 This standard describes methods for qualifying and controlling the quality of FBE pipe coatings, provides guidelines for proper app
24、lication, and identifies inspection and repair techniques to obtain the best applied FBE coating system. 1.4 Appendixes A through N describe the methods for testing various properties of coatings and all are mandatory for compliance with this standard. _ Section 2: Definitions Applicator: The organi
25、zation responsible to the purchaser for the coating application. Batch: The quantity of coating material produced during a continuous production run of not more than 8 hours. Coating: (1) A liquid, liquefiable, or mastic composition that, after application to a surface, is converted into a solid pro
26、tective, decorative, or functional adherent film; (2) (in a more general sense) a thin layer of solid material on a surface that provides improved protective, decorative, or functional properties. Coating Material: Epoxy powder. Cutback: The length of pipe left uncoated at each end for joining purpo
27、ses (e.g., welding). Holiday: A discontinuity in a protective coating that exposes unprotected surface to the environment. Inspector: The authorized agent of the purchaser. Purchaser: The owner company or the authorized agency that purchases the coated pipe. Supplier: The manufacturer or distributor
28、 of the coating material and its authorized technician. _ Section 3: Coating Materials 3.1 Supplier Information The suppliers must provide the following: (a) Directions for handling and storage of the coating materials; (b) Material safety data sheets (MSDS); (c) Certification of the determined phys
29、ical properties of batch (batch certificate) in accordance with Table 1 (see Paragraph 3.3); (d) Product quality certificate in accordance with Table 2 (see Paragraph 3.4); and (e) Technical data sheet (TDS) with basic physical properties including operating temperature limits of the product. 3.2 La
30、bels All boxes of epoxy powder supplied shall be labeled with the following information: (a) Epoxy powder manufacturers name; SP0394-2013 2 NACE International (b) Product description; (c) Product number; (d) Batch number; (e) Manufacturing location; (f) Shelf life/expiration date; (g) Manufacturing
31、date; and (h) Temperature requirement for storage and transportation. 3.3 Batch Certificates Each batch of powder shall be provided with a test certificate in accordance with Table 1. Table 1 Epoxy Powder Properties Property Value Limits Test Method Density/Specific Gravity In accordance with suppli
32、ers specification See Appendix A Particle Size Max. Retained on 150 m (100 mesh) sieve; max. retained on 250 m (60 mesh) sieve within the manufacturers recommendation See Appendix L Shelf Life In accordance with suppliers specifications and recommended storage conditions See Appendix B Gel Time In a
33、ccordance with suppliers specification or within 20% of the published value See Appendix C Cure Cycle Capable of cure at temperatures and time specified by the supplier In accordance with suppliers specification Moisture Content or Total Volatile Content(A)0.5% max. in accordance with Appendix E or
34、0.6 % in accordance with Appendix M See Appendix E and Appendix M (A) Either moisture or total volatile content may be determined at the suppliers discretion. 3.4 Product Quality Certificate 3.4.1 The coating supplier shall provide a product quality certificate in accordance with Table 2. The test s
35、pecimens shall be either laboratory-prepared coupons in accordance with Paragraph 3.5, or coupons collected from pipe coated at the factory. A minimum of two test specimens are needed unless otherwise specified in each test requirement. 3.4.2 The product qualification tests must be repeated if the e
36、poxy powder formulation, composition, or manufacturing location changes. SP0394-2013 NACE International 3 Table 2 FBE Coating Qualities Test Acceptance Criteria No. of Test Specimens Test Method Cross-section porosity Rating of 1 to 4, inclusive 2 Appendix G Interface porosity Rating of 1 to 4, incl
37、usive 2 Appendix G Flexibility: 3.0 /PD(A) permanent strain at 30 C No cracks, tears, delamination, or disbondment 3 Appendix H Hot-water adhesion: 48 hours, at 75 3 C Rating of 1 to 2, inclusive 3 Appendix J Hot-water adhesion: 28 days, at 75 3 C Rating of 1 to 3, inclusive 3 Appendix J Cathodic di
38、sbondment: 24 hours, 65 3 C, 3.5V 6.5 mm radial disbondment 3 Appendix FCathodic disbondment: 28 days 1.5 V, 20 3 C 8 mm radial disbondment 3 Appendix F Cathodic disbondment: 28 days, 1.5 V, 65 3 C 15.0 mm radial disbondment 3 Appendix F Strained coating cathodic disbondment: 28 days, 1.5 V, 20 3 C
39、No cracking, no delamination or disbondment 3 Appendix N Thermal characteristics Coating Tgshould be at least 5 C above the pipeline design temperature, or in accordance with suppliers specification 1 Appendix D Delta H (heat of reaction) In accordance with suppliers specification 1 Appendix D Impac
40、t resistance 1.5 J 3 Appendix I (A) Degrees per pipe diameter (/PD) NOTE: Testing for pipelines operating above the glass transition temperature of the coating shall be adjusted for atypical service applications such as elevated operating temperatures. Test methods and acceptance criterion shall be
41、based on the product TDS and recommendations by the coating manufacturers. 3.4.3 Laboratory specimens should be prepared in accordance with Paragraph 3.5. 3.5 Laboratory Specimens 3.5.1 Surface Preparation Test panels shall be hot-rolled carbon steel (UNS G10200,(1)AISI(2)1020, or approved equivalen
42、t) and have dimensions in accordance with the cited test method. The surface shall be abrasive blast cleaned in accordance with NACE No. 1/SSPC(3)-SP 51and NACE Standard RP02872using steel grit that shall be used during production to provide a surface profile of 50 to 100 m (2.0 to 4.0 mil), measure
43、d from peak to valley in accordance with these standards. 3.5.2 Coating Application 3.5.2.1 Coating application and curing shall be in accordance with the suppliers recommendations. (1)Unified Numbering System for Metals and Alloys (UNS). UNS numbers are listed in Metals however, the specified minim
44、um average shall be above 350 m (14 mil). NOTE: Greater FBE coating thickness can limit field bending, coating application in the plant, and in the field. 5.5.1 When FBE coating is used in systems in which the service temperature of the coated surfaces exceeds 65 C (150 F), thicker FBE minimums may
45、be used. Refer to the suppliers guidance for thickness recommendations for service temperatures above 65 C (150 F). 5.5.2 Other situations that may require a greater FBE minimum thickness are: (a) The pipe is to be concrete coated; (b) The pipe is placed through a drilled crossing; (c) Rocky or high
46、-impact backfill; or (d) Mechanical damage during construction. 5.5.3 The cutback limits shall be specified by the purchaser. _ Section 6: Production Inspection and Testing 6.1 Plant Access The inspector representing the purchaser shall have free access to all parts of the applicators plant concerne
47、d with the storage, application, testing, and handling of the FBE powder and coating of the purchasers pipe, while work on the contract of the purchaser is being performed. The inspection should be performed by a person qualified by experience and training in coating inspection methods. The applicator shall afford the inspector, without charge, inspection facilities to satisfy the inspector that the coating is being applied in accordance with the requirements of this standard. All inspections shall be made at the place of application before shipment of the co
