1、 Standard Recommended Practice Field-Applied Heat-Shrinkable Sleeves for Pipelines: Application, Performance, and Quality Control 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
2、 any respect preclude anyone, whether he 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 i
3、mplication 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 in no way be in
4、terpreted 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 responsibility for the
5、 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 individual volunteers
6、. 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 address all potent
7、ial 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 environmental prote
8、ction 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 be revised or w
9、ithdrawn at any time without prior notice. 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 edition. Purchasers of NACE International standards may
10、 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 +1 281 228-6200). Approved 2003-11-14 NACE International 1440 South Creek Dr. Hous
11、ton, Texas 77084-4906 +1 (281)228-6200 ISBN 1-57590-177-3 2003, NACE International NACE Standard RP0303-2003 Item No. 21101 RP0303-2003 NACE International i _ Foreword This NACE standard recommended practice provides the most current technology and industry practices for the use of field-applied hea
12、t-shrinkable sleeve systems. This standard is intended for use by corrosion control personnel, design engineers, project managers, purchasers, and construction engineers and managers. It is applicable to underground steel pipelines in the oil and gas gathering, distribution, and transmission industr
13、ies. This standard was prepared by NACE Task Group 248 on Heat-Shrinkable Sleeve Coatings for External Repair, Rehabilitation, and Weld Joints on Pipelines. This Task Group is administered by Specific Technology Group (STG) 03 on Protective Coatings and LiningsImmersion/Buried. It is also sponsored
14、by STG 04 on Protective Coatings and LiningsSurface Preparation, and STG 35 on Pipelines, Tanks, and Well Casings. 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 thes
15、e terms in the NACE Publications Style Manual, 4th ed., Paragraph 7.4.1.9. Shall 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. _ RP030
16、3-2003 ii NACE International _ NACE International Standard Recommended Practice Field-Applied Heat-Shrinkable Sleeves for Pipelines: Application, Performance, and Quality Control Contents 1. General 1 2. Definitions 1 3. Coating Systems . 1 4. Coating Material 1 5. Coating Performance 2 6. Surface P
17、reparation of Pipe 2 7. Coating Application . 4 8. Inspection and Repair . 4 References 4 Table 1: Heat-Shrinkable-Sleeve Properties 3 _RP0303-2003 NACE International 1 _ Section 1: General 1.1 This standard presents guidelines for establishing mini-mum requirements to ensure proper application and
18、perfor-mance of field-applied, heat-shrinkable sleeves to the exter-nal surfaces of coated pipe. Included are methods for quali-fying and controlling the quality of a heat-shrinkable sleeve, guidelines for proper application, and inspection and repair techniques to ensure its long-term performance.
19、1.2 This standard is applicable to coating systems used to prevent corrosion in conjunction with cathodic protection. 1.3 This standard is applicable to heat-shrinkable wrap-around or tubular-type sleeve systems. _ Section 2: Definitions Applicator: The organization responsible to the purchaser for
20、the coating application. Coating Materials: Pre-manufactured heat-shrinkable sleeves and associated accessory products, e.g., primer, fil-ler materials, coating repair materials, etc. Coating Repair Materials: Pre-manufactured patches, fil-lers, etc., compatible with and made from similar materials
21、as the heat-shrinkable sleeves. Coating System: The complete number and types of coats applied to a substrate in a predetermined order. Filler Material: Compatible material used under a heat-shrinkable sleeve to fill voids or bridge transitions. Holiday: A discontinuity in a protective coating that
22、exposes unprotected surface to the environment. Inspector: The authorized agent of the purchaser. Mainline Coating: The plant-applied pipeline coating to which the heat-shrinkable sleeve girth weld joint-protection system must adhere and be compatible. Purchaser: The owner company or the authorized
23、agency that has the authority for the pipe to which the coating is to be applied. Repair Area: Area of original coating system that has been damaged and is being repaired using the coating materials. Shelf Life: The maximum allowable storage time for a coat-ing material prior to its use. Supplier: T
24、he manufacturer and/or distributor of the coating material. _ Section 3: Coating Systems 3.1 The standard for heat-shrinkable sleeves required for normal conditions contains the following components: (a) Primer (if specified) (b) Pre-manufactured heat-shrinkable sleeve (wrap-around or tubular-type).
25、 The heat-shrinkable sleeve shall consist of a heat-recoverable polyolefin backing coated with a mastic or hot-melt type adhesive layer. (c) Coating repair materials (if required). _ Section 4: Coating Material 4.1 Coating Material Supplier Information 4.1.1 The coating material supplier shall furni
26、sh the following information in writing to the purchaser and/or applicator: (a) Directions for handling and storing the coating material; (b) Laboratory performance test results of the basic physical properties of the coating materials; and; RP0303-2003 2 NACE International (c) Material safety data
27、sheets (MSDS). 4.2 Handling of Coating Materials 4.2.1 Coating material batches shall be identified 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 t
28、he supplier so that contamination or adverse effects on the coating are avoided. 4.2.2 Shelf Life: Any batch of coating material that has exceeded the recommended shelf life when delivered by the supplier may be rejected by the purchaser. 4.2.2.1 Any rejected coating material shall be immediately re
29、moved from the job site. At the dis-cretion of the purchaser, any batch of coating mat-erial that has exceeded the recommended 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 applica
30、tor. _ Section 5: Coating Performance 5.1 Recommended characteristics of an applied coating system are outlined in NACE Standard RP0169.15.2 The heat-shrinkable sleeve coating system and coating repair materials shall meet the performance characteristics as specified in Table 1. 5.3 The heat-shrinka
31、ble sleeve coating system must be compatible with the mainline coating as demonstrated by the coating-specific performance testing as identified in Table 1. 5.4 Performance requirements have been identified for mastic-based and hot-melt type adhesives. Mastic adhe-sives typically have an upper opera
32、ting temperature range of 80C (180F) while hot-melt adhesives can typically per-form up to 120C (250F). When performance requirements are identified as “at operating temperature,” the supplier shall provide results as noted in Table 1 at the rated pipe-line operating temperature for the product or s
33、ystem. 5.5 At the purchasers option, the supplier shall demon-strate fitness for use through prequalification testing, con-sisting of a field application and subsequent destructive peel adhesion testing over the steel cutback and mainline coating. Additional tests may be specified by the purchaser.
34、_ Section 6: Surface Preparation of Pipe 6.1 This section covers recommended procedures for sur-face preparation to ensure the desired performance of a heat-shrinkable sleeve. Note that surface preparation is crit-ical to performance and, therefore, the required surface pre-paration must be clearly
35、stated in suppliers installation liter-ature and performance documentation. 6.2 The applicator shall inspect the pipe surface to be coated for visible dents, scabs, slivers, and other damage. These defects shall be noted and corrected under the direc-tion of the pipeline purchaser. 6.3 The mainline
36、coating edge shall be beveled to 30 or less either at the coating factory or in the field prior to instal-lation of the heat-shrinkable-sleeve coating system. 6.4 The pipe shall be preheated to at least 5C (9F) above the dew point to remove the presence of moisture prior to surface cleaning. 6.5 Pri
37、or to blast or wire-brush cleaning, the surface of the pipe, weld, or repair area shall be inspected and, if required, cleaned as described in SSPC(1)-SP 12to remove the presence of oil, grease, or other contaminants. 6.6 Proper surface preparation requires that metal surfaces be blast cleaned or wi
38、re-brush cleaned to achieve the recommended surface preparation (NACE, SSPC, or ISO(2) 3) as outlined in the respective suppliers installation guides and agreed to by the purchaser. 6.7 Blast cleaned surface profiles shall be angular and a minimum of 50 m (2.0 mils) from peak to valley or as otherwi
39、se specified by the supplier.46.8 The heat-shrinkable-sleeve coating system shall be installed before any corrosion products form but within four hours after surface preparation. If the heat-shrinkable-sleeve coating systen is not installed within the specified period, the surface preparation shall
40、be repeated. 6.9 Wire-brush cleaned surfaces shall leave a coarse pro-file such that the surface is not polished. _ (1)SSPC: The Society for Protective Coatings (SSPC), 40 24thSt., 6thFloor, Pittsburgh, PA 15222-4656. (2)International Organization for Standardization (ISO), 1, rue de Varemb, Case po
41、stale 56, CH-1211 Geneva 20, Switzerland. RP0303-2003 NACE International 3 Table 1: Heat-Shrinkable-Sleeve Properties Property Test Method(A)Unit Mastic Sleeve Requirement Hot-Melt Sleeve Requirement Tensile Strength at Failure ASTM(B)D 6385kPa (psi) 15,200 (2,200) 15,200 (2,200) Ultimate Elongation
42、 ASTM D 638 % 400 400 Heat Aging: 150C (300F)/21 days ASTM D 638 % Elongation 200 200 Heat Shock: 225C (437F)/4 hours ASTM D 26716Visual No cracking, flow, or dripping No cracking, flow, or dripping Volume Resistivity ASTM D 2577ohm-cm 1013min. 1013min. Dielectric Voltage Breakdown ASTM D 1498kV/mm
43、(kV/in.) 5 min. (125 min.) 5 min. (125 min.) Impact at 23C (73F) ASTM G 149J/mm (ft-lb/in.) 4.5 (40) 5.6 (50) Adhesion to Steel Cutback and Mainline Coating ASTM D 100010N/cm (pli) 25 (15) 80 (45) Lap Shear Strength(C) at ambient temperature at operating temperature ASTM D 100211kPa (psi) 175 (25) 2
44、0 (3) 700 (100) 50 (7) Cathodic Disbondment at 23C (73F) ASTM G 812mm rad. (in. rad.) 15 (0.6) 15 (0.6) Cathodic Disbondment at Operating Temperature ASTM G 4213mm rad. (in. rad.) 25 (1.0) 25 (1.0) Hot-Water Immersion 120 days at Max. Operating Temperature, Sealed Ends ASTM D 87014Visual No delamina
45、tion, blisters, or water under sleeve No delamination, blisters, or water under sleeve Water Absorption ASTM D 57015% 0.1 max. 0.1 max. Low-Temperature Flexibility ASTM D 2671 C (F) -10C min. (14F min.) -15C min. (5F min.) _ (A)Properties tested according to ASTM D 638 and ASTM D 2671 shall be evalu
46、ated on the heat-shrinkable sleeve backing material only, i.e., adhesive removed. (B)ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428. (C)Lap shear requirements identified are representative of many pipeline applications. However, factors such as pipe diameter, steel wall thick
47、ness, soil type, and burial conditions may result in higher shear stress forces being imparted on the coating materials. 6.10 The adjacent mainline coatings over which the heat-shrinkable coating system is to be applied shall be sweep blasted or manually abraded prior to installation. Existing mainline coatings that are not being coated shall be pro-tected from damage by impact, gouging, mechanical cl
