1、THE CORROSION SOCtEIY NACE Standard RP0399-2004 Item No. 21089 Stand a rd Recommended Practice Plant-Applied External Coal Tar Enamel Pipe Coating Systems: Application, Performance, and Quality Control This NACE International standard represents a consensus of those individual members who have revie
2、wed this document, its scope, and provisions. Its acceptance does not in any respect preclude anyone, whether they have 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
3、 NACE International standard is to be construed as granting any 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 Paten
4、t. This standard represents minimum requirements and should in 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
5、in specific instances. NACE International assumes no responsibility 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 polic
6、ies which preclude the issuance of interpretations by individual 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 u
7、se. This NACE International standard may not necessarily address 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 respo
8、nsible for establishing appropriate health, safety, and environmental 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 Inte
9、rnational standards are subject to periodic review, and may be revised or withdrawn at any time. 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. The user is cautioned to obtain the latest e
10、dition. Purchasers of NACE International standards may receive current information on all standards and other NACE International publications by contacting the NACE International Membership Services Department, 1440 South Creek Drive, Houston, Texas 77084-4906 (telephone +I 281 228-6200). Reaffirmed
11、 2004-03-3 1 Approved 1999-04-24 NACE International 1440 South Creek Drive Houston, Texas 77084-4906 +I (281) 228-6200 ISBN 1-57590-077-7 02004, NACE International RP0399-2004 Foreword This NACE standard recommended practice provides the most current technology and industry practices for the use of
12、plant-applied coal tar enamel external pipe coating systems. This standard is intended for use by corrosion-control personnel, design engineers, project managers, purchasing personnel, and construction engineers and managers. It is applicable to underground steel pipelines in the oil and gas gatheri
13、ng, distribution, and transmission industries. This standard was originally prepared in 1999 by NACE Task Group T-10D-2 on Coal Tar Enamel Coatings, a component of Unit Committee T-IOD on Protective Coating Systems. It was reaffirmed in 2004 by Specific Technology Group (STG) 03 on Protective Coatin
14、gs and Linings- Immersion/Buried. This standard is issued by NACE International 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 Publications Style Manual, 4th ed., Paragraph 7.4.1.9. Shall
15、and must are used to state mandatory requirements. The term should is used to state something considered good and is recommended but is not mandatory. The term may is used to state something considered optional. NACE International I RP0399-2004 NACE International Stand a rd Recommended Practice Plan
16、t-Applied External Coal Tar Enamel Pipe Coating Systems: Application, Performance, and Quality Control Contents 1. General 1 2. Definitio 1 3. Coating . 1 4. Coating Material 1 5. Coating Performance 2 6. Surface Preparation of Pipe 2 7. Coating Application . 3 8. Production Inspection and Testing 3
17、 9. Repair 5 Appendix A-Physical Properties of Coating Systems . . . 7 Table AI : Physical Properties of Coal Tar Enamel . 8 Table A2: Physical Properties of Primers for Coal Tar Enamel 9 Table A3: Physical Properties of Reinforcing Wrap 10 Table A4: Whitewash 11 II NACE International RP0399-2004 Se
18、ction 1: General 1 .I This standard establishes minimum requirements to ensure proper application and petformance of a plant- to ensure its long-term petformance. applied coal tar enamel system to the external sutfaces of pipe. Included are methods for qualifying and controlling the quality of a coa
19、l tar enamel (CTE) system, guidelines for its proper application, and inspection and repair techniques 1.2 This standard is applicable to coating systems used to prevent corrosion in conjunction with cathodic protection. Section 2: Definitions Applicator: The organization responsible to the purchase
20、r for the coating application. Cutback: The length of pipe left uncoated at each end for joining purposes (e.g., welding, push-on, etc.). Batch: Quantity of coating material produced in a single Holiday: A discontinuity in a protective coating that production run. exposes unprotected sutface to the
21、environment. Coating Materials: Primer, coal tar enamel, and Inspector: The authorized agent of the purchaser. re info rci ng wrap. Coating System: The complete number and types of coats applied to a substrate in a predetermined order. (When used in a broader sense, sutface preparation, Shelf Life:
22、The maximum allowed storage time for a pretreatments, dry film thickness, and manner of application are included.) Purchaser: The owner company or the authorized agency that purchases the coated pipe. coating material prior to its use. Supplier: The manufacturer and/or distributor of the coating mat
23、erial and its authorized technician. Section 3: Coating Systems 3.1 The standard coal tar enamel coating system required trench conditions, or other similarly difficult conditions for normal conditions contains the following components: contains the following components: (a) Primer (b) Coal tar enam
24、el: 2.4 mm (94 mils) minimum (c) Fiberglass innerwrap (d) Coated fiberglass or other petformance-comparable o ute rwrap (e) Kraft paper, water-emulsion latex paint, or whitewash 3.2 The double-coat-and-wrap coal tar enamel coating system required for submerged lines, extraordinarily severe (a) Prime
25、r (b) Coal tar enamel: 2.4 mm (94 mils) minimum (c) Fiberglass innerwrap (d) Coated fiberglass or other petformance-comparable o ute rwrap (e) Coal tar enamel: 0.79 mm (31 mils) minimum (f) Coated fiberglass or other petformance-comparable o ute rwrap (9) Kraft paper, water-emulsion latex paint, or
26、whitewash 4.1 Coating Material Supplier Information Section 4: Coating Material 4.1.1 Upon request, the coating material supplier shall furnish the following information for the purchaser and/or applicator in writing: (a) Directions for handling and storage of the coating material (b) Laboratory pet
27、formance test results of the basic physical properties of the coating materials (c) Certification of the physical properties of each batch of material (d) Material safety data sheets (MSDS) NACE International 1 RP0399-2004 4.2 Handling of Coating Materials 4.2.1 Coating material batches shall be ide
28、ntified by a batch coding system devised by the supplier. The batch code shall include a reference to the date of manufacture. Coating materials shall be shipped and stored according to recommendations from the supplier and so that contamination or adverse effects on the coating are avoided. 4.2.2 S
29、helf Life: Any batch of coating material that has exceeded the recommended shelf life may be rejected by the purchaser. 4.2.2.1 Any rejected coating material shall be immediately removed from the work site. At the option of the purchaser, any batch of coating material that has exceeded the recommend
30、ed shelf life may be tested to verify that it meets or exceeds the requirements as set forth herein or by other industry standards as agreed on by the purchaser and the applicator. The expense of such tests shall not be the responsibility of the purchaser. The purchaser shall not be under any obliga
31、tion to accept material that has exceeded its shelf life. 4.3 Coating Material Properties 4.3.1 It is the responsibility of the coating material supplier to petform the tests referenced in this section. The purchaser or applicator may also perform any or all of the referenced tests as part of a qual
32、ity assurance program. 4.3.2 The coating material shall meet the value limits for the properties listed in Appendix A. Section 5: Coating Performance 5.1 Recommended characteristics of an applied coating system are outlined in NACE Standard RPOI 69. 5.2 Recommended Coal Tar Enamel Properties 5.2.1 T
33、hermal Conductivity: 0.16 W/m-K (1.1 BTU/ft/h/F/in.) (ASTM“ E 1225) 5.2.6 Cathodic Disbondment: max. 8-mm (0.3-in.) 5.2.2 Electrical Resistance: 1 x IOl4 Ohm-cm (ASTM C 61 5.2.7 Adhesion: min. 2.4 MPa (350 psi) (ASTM D 5.2.3 Dielectric Strength: IO V/pm (250 V/mil) (ASTM D 495)4 5.2.4 Water Absorpti
34、on: od50 in.) (ASTM D 95)5 5.2.5 Water Vapor Permeability: (ASTM E 96)6 0.2% or 0.3 9/30 om (0.1 6.5 x IO3 perms radius at 60 days (ASTM G 8)7 454 1 ) 5.2.8 Coefficient of Friction: 0.59 to 0.91 (ASTM D 451 8) Section 6: Surface Preparation of Pipe 6.1 This section covers recommended procedures for
35、scabs, slivers, and other damage. Damage shall be noted sutface preparation to ensure the desired petformance of a on the inbound tally sheet and the purchaser shall be coal tar enamel coating system. 6.2 Bare pipe shall be supplied to the applicator visibly free of mill lacquer, oil, grease, and ot
36、her foreign deposits. The applicator shall remove any remaining deleterious deposits from the sutface to be coated in accordance with SSPC“- SP l.1 6.3 The applicator shall visibly inspect the pipe for dents, informed of the damage within 24 hours. 6.4 The pipe shall be uniformly heated to remove mo
37、isture from the sutface. 6.4.1 Type 4 epoxy-based primer (see Appendix A) requires preheating of the pipe prior to application. ()ASTM International (ASTM), 100 Barr Harbor Dr., West Conshohocken, PA 19428 ()SSPC: The Society for Protective Coatings, 40 24th St., Pittsburgh, PA 15222. NACE Internati
38、onal RP0399-2004 6.5 The sutface of the pipe shall be blast cleaned using grit or grishot to the sutface profile described in NACE No. 3/SSPC-SP 6” or SIS3 B-Sa 2 in ISO4 8501-1.12 The sutface temperature of the pipe shall be at least 3C (5F) above the dew point during blasting operations. 6.6 Surfa
39、ce profile shall be a minimum of 38 to 89 pm (1.5 to 3.5 mils) from peak to valley. 6.7 Bevels, lands, and internal coatings shall be protected from shogrit blasting and damage by impact, gouging, or any other contact. 6.8 Residual products from blasting shall be removed from the interior and exteri
40、or sutface of the pipe. Section 7: Coating Application 7.1 This section describes coating material selection and 7.6 The coal tar enamel shall be continuously monitored to application parameters for obtaining optimum petformance ensure that it is held at the recommended application of a coal tar ena
41、mel system. tempe rat u re d u ring a p p I cat ion. 7.2 The purchaser shall designate the specific primer, coal tar enamel, innerwrap, outerwrap, kraft paper, and whitewash or water-emulsion latex paint to be used. 7.2.1 The primer and coal tar enamel shall be furnished by the same manufacturer. 7.
42、3 The primer shall be applied uniformly and be free of runs, sags, drips, bare spots, and other defects. 7.4 The primer shall be applied at a minimum dry-film thickness of 19 pm (0.76 mils) and should be a maximum of 76 pm (3.0 mils) (dry) thick as measured from the profile peaks. The dry-film thick
43、ness can be measured using magnetic pull-off coating thickness gauges. Magnetic flux or fixed-probe gauges must be calibrated to SSPC-PA 2.13 7.7 The coal tar enamel shall be applied by spraying, flooding, or pouring to maintain a uniform, continuous coating at the specified thickness. The thickness
44、 of the coating system shall be specified by the purchaser within the following parameters: 7.7.1 The minimum dry-film thickness of the coal tar enamel shall be 2.4 mm (94 mils). 7.7.2 The dry thickness of the coating system shall be from 3.0 to 3.6 mm (120 to 140 mils). 7.8 The innerwrap shall be a
45、pplied simultaneously with the coal tar enamel at a nominal lap of 1.3 cm (0.5 in.) and a minimum lap of 0.64 cm (0.25 in.). It shall be imbedded in the middle of the coal tar enamel. 7.5 The primer shall be completely dry prior to application of the coal tar enamel and reinforcing wraps. The surfac
46、e temperature of the primed pipe shall be at least 3C (5F) above the dew point prior to application of the coal tar enamel. 7.10 Unless otherwise specified, a spiral wrap of kraft 7.9 The outerwrap shall be mechanically applied at a nominal lap of 1.3 cm (0.5 in.) and a minimum lap of 0.64 cm (0.25
47、in.) and be bonded to the coal tar enamel. paper shall be applied over the coating system. 7.1 1 The cutback limits and preparation shall be specified by the purchaser. 7.5.1 Type 4 epoxy-based primer shall be “tacky” prior to application of the coal tar enamel. 7.12 Requirements for additional laye
48、rs of coating are described in Paragraph 3.2. Section 8: Production Inspection and Testing 8.1 Plant Access handling, and application of the coating materials being applied in accordance with the purchasers contract. The The representative of the purchaser and/or the inspector inspection should be p
49、etformed by a person qualified by representing the purchaser shall have access to all areas of experience and training in coating inspection methods. All the applicators plant concerned with the receipt, storage, testing shall be done by the applicator at the place of application prior to shipment of the coated pipe. (3)Swedish Standards Institution (SIS), Box 3295, S-103 66, Stockholm 3, Sweden. (4)lnternational Organization for Standardization (ISO), 1 rue de Varembe, Case Postale 56, CH-1 121 Geneva 20, Switzerland NACE International 3 RP0399-2004 8.2
