1、 Standard Practice Application of Internal Plastic Coatings for Oilfield Tubular Goods and Accessories 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 any respect preclude anyon
2、e, 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 any right, by implication or otherw
3、ise, 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 interpreted as a restr
4、iction 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 interpretation or u
5、se 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. Users of this NACE
6、 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 potential health and safet
7、y 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 protection practices, in
8、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 CAUTIONARY NOTICE: NACE International standards are subject to periodic review, and may be revised or withdrawn at any time
9、 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 reaffirmation or revision. The user is caution
10、ed 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 First Service Department, 1440 South Creek Dr., Houston, Texas 77084-4906 (telephone +1 281-228-
11、6200). Reaffirmed 2008-03-19 Reaffirmed September 2002 Reaffirmed September 1996 Approved February 1991 NACE International 1440 South Creek Dr. Houston, Texas 77084-4906 +1 281-228-6200 ISBN 1-57590-153-6 2008, NACE International NACE SP0191-2008 (formerly RP0191) Item No. 21048 SP0191-2008 NACE Int
12、ernational i _ Foreword This standard practice was prepared to serve as an industry guideline for the proper application of internal plastic coatings on oilfield tubular goods and accessories. This standard is intended for users, applicators, and manufacturers. Premature failures of coatings on oilf
13、ield tubular goods and accessories often occur when the surface has not been properly prepared or the coating has not been properly applied. This standard presents proper procedures to be followed to ensure appropriate application of the coating to give the anticipated extended life to oilfield tubu
14、lar goods and accessories. This standard was originally prepared in 1991 by NACE Task Group T-1G-4, a component of Unit Committee T-1G on Protective Coatings, Elastomers, and Other Nonmetallic Materials for Oilfield Use. This standard was reviewed by T-1G and reaffirmed in 1996. It was reaffirmed in
15、 2002 and 2008 by Specific Technology Group (STG) 33Oil and Gas Production: Nonmetallics and Wear Coatings (Metallics). This STG is comprised of representatives from the oil and gas industry including consumers, producers, and interested individuals. This standard is issued by NACE International und
16、er the auspices of STG 33. 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. The terms shall and must are used to state a requirement, and are considered mandatory. The term should is used to st
17、ate something good and is recommended, but is not considered mandatory. The term may is used to state something considered optional. _ SP0191-2008 ii NACE International _ NACE International Standard Practice Application of Internal Plastic Coatings for Oilfield Tubular Goods and Accessories Contents
18、 1. General . 1 2. Definitions . 1 3. Preliminary Requirements. 1 4. Initial Inspection 2 5. Surface Preperation 2 6. Coating Application . 3 7. Coating Inspection 4 8. Coupling/Connection Make-Up. 6 9. Quality Control 6 10. Handling, Storage, and Shipping 6 11. Marking . 7 References 7 Appendix A:
19、Bullet-Nosed Pin Ends on API 8-Round Connections (Mandatory). 8 Appendix B: Required Inspection Equipment (Mandatory) 8 Appendix C: Tubing Pin End FinishCoating Thickness Requirements (Mandatory) 9 Appendix D: Typical Holiday Inspection EquipmentPin Ends, Couplings, and Other Accessories (Nonmandato
20、ry) 10 Figure A1: Bullet-Nosed Pin Ends on API 8-Round Connections . 8 Figure C1: Tubing Pin End Finish 9 Figure D1: Typical Holiday Inspection Equipment. 10 _ SP0191-2008 NACE International 1 _ Section 1: General 1.1 This standard presents guidelines for the proper application of plastic coatings t
21、o the internal surfaces of oilfield tubular goods and accessories. 1.2 The function of the internal plastic coating system is to provide a protective barrier between the metal surface and the environment. 1.3 By preventing or minimizing corrosion with protective coatings, the service life of the tub
22、ular goods and accessories is extended. Proper coating application prevents premature failure. 1.4 This standard addresses initial inspection of the tubular goods and accessories prior to coating, surface preparation, coating application, coating inspection, coupling/connection make-up, quality cont
23、rol, handling, storage, shipping, and marking. _ Section 2: Definitions Applicator: An individual or company that performs the plastic coating application. User: An individual or company, or its authorized representative(s), who makes use of the internally plastic-coated (IPC) tubular goods and acce
24、ssories. IPC material: Internally plastic-coated tubular goods (tubing, casing, line pipe, or drill pipe) and accessories (couplings, fittings, valves, mandrels, packers, etc.) Manufacturer: An individual or company that manufactures the plastic coating. Plastic coating: A polymeric film applied to
25、oilfield tubular goods (tubing, casing, line pipe, or drill pipe) and accessories (couplings, fittings, valves, mandrels, packers, etc.) to form a protective barrier between the metal surface and the environment to minimize corrosion, contamination, and/or deposit formation. Thick-film coating: A pl
26、astic coating that has a final dry film thickness of 250 to 760 m (10 to 30 mil). Thin-film coating: A plastic coating that has a final dry film thickness of less than 250 m (10 mil). _ Section 3: Preliminary Requirements 3.1 The applicator shall furnish all labor, coating, and equipment to coat tub
27、ular goods and accessories internally in accordance with this standard. 3.2 In cases in which this standard is in conflict with the coating applicators specifications, the applicator must review conflicts with the user prior to the job startup. 3.3 The user reserves the right to inspect all IPC mate
28、rial and activities at any time and to reject any work that does not meet the requirements of this standard. 3.4 The applicator shall notify the user a minimum of 72 hours prior to the startup of coating operations, unless otherwise agreed between the user and applicator. 3.5 The user shall ensure t
29、hat all tubular goods and accessories supplied by the user meet applicable API,(1)ANSI,(2)ASTM,(3)and NACE standards. 3.6 The applicator shall provide the user with specifications addressing the application procedures for the coating being applied. 3.7 The user shall specify the level of holiday ins
30、pection of IPC tubular goods to be performed on all specified coated surfaces in accordance with one of the following levels: Level I: The tube body Level II: The tube body and pin-end chamfer Level III: The tube body, pin-end chamfer, and couplings _ (1)American Petroleum Institute (API), 1220 L St
31、. NW, Washington, DC 20005-4070.(2)American National Standards Institute (ANSI), 25 West 43rd St., 4th Floor, New York, NY 10036.(3)ASTM International (ASTM), 100 Barr Harbor Dr., West Conshohocken, PA 19428-2959. SP0191-2008 2 NACE International 3.8 The user shall specify the holiday allowance for
32、each order of IPC material. 3.9 The user shall take all practical measures to provide material suitable for coating to the applicator. The pin ends on API 8-round1connections shall be bullet-nosed (rounded), leaving no sharp surfaces. Appendix A (mandatory) specifies dimensions for API 8-round bulle
33、t-nosed pin ends. 3.10 The applicator shall take all practical measures to identify unsuitable material prior to processing. 3.11 Appendix B (mandatory) lists inspection equipment required to perform inspection procedures. _ Section 4: Initial Inspection 4.1 The applicator shall inventory all tubula
34、r goods and accessories received, noting the following applicable information: (a) Number of pieces; (b) Approximate total length; (c) Indicated size, weight, grade, and range; (d) Type of connection; (e) Manufacturer; and (f) Type and number of thread protectors. 4.2 The applicator shall visually i
35、nspect all tubular goods and accessories for bent joints, out-of-round sections, damaged ends, and other obvious defects. Material exhibiting such defects shall be set aside and distinctly marked. 4.3 Tubular goods and accessories with non-API, proprietary premium connections may not be suitable for
36、 holiday-free coating application and should be reviewed with the connection manufacturer and applicator prior to coating. 4.4 Magnetism in the tubular goods and accessories that results in unacceptable accuracy of magnetic gauges used to measure the dry film thickness of the plastic coating shall b
37、e removed or altered to allow accurate thickness measurements. _ Section 5: Surface Preparation 5.1 Cleaning 5.1.1 Tubular goods shall be thermally cleaned. Accessories shall be thermally cleaned, solvent cleaned, or a combination of the two. Couplings shall be removed prior to cleaning. 5.1.2 Therm
38、al cleaning shall be performed by heating the material uniformly in an oven at 316 to 427 C (600 to 800 F) for a minimum of two hours. Metal temperature shall not exceed 427 C (800 F) for carbon steel; corrosion-resistant alloys may require different temperature limitations. Thermal-cleaning ovens s
39、hall be equipped with accurate temperature-monitoring equipment. 5.1.3 Solvent cleaning shall be performed in accordance with SSPC(4)-SP 1.25.1.4 Wet blasting may be used to clean material prior to thermal and/or solvent cleaning. 5.2 Abrasive Blasting 5.2.1 Subsequent to cleaning, tubular goods and
40、 accessories shall be dry abrasive blasted on 100% of the surface to be coated to NACE No. 1/SSPC-SP 5.35.2.2 Compressed air used in blasting and throughout the coating process shall be free of condensed water and oil. The applicator shall check the air system for these contaminants with a clean whi
41、te cloth or blotter a minimum of once every four hours. If contamination of the air system is indicated, all material coated since the last acceptable check shall be rejected. 5.2.3 Tubular goods and accessories shall be dry prior to abrasive blasting. Abrasive blasting shall not be performed when t
42、he metal surface temperature is less than 3 C (5 F) above the atmospheric dew point. The applicator shall measure the metal surface temperature and relative humidity and determine the dew point a _ (4) The Society for Protective Coatings (SSPC), 40 24th St., 6th Floor, Pittsburgh, PA 15222-4656. SP0
43、191-2008 NACE International 3 minimum of once every four hours. When the relative humidity in the blast area is greater than 85%, the applicator shall measure the metal surface temperature and relative humidity and determine the dew point a minimum of once every hour. 5.2.4 The surface profile shall
44、 be 25 to 76 m (1.0 to 3.0 mil). The surface profile shall be measured a minimum of once every four hours. Measurement of surface profiles using replica tape is outlined in NACE Standard RP0287.45.2.5 API pin ends shall be blasted by means that do not cause detrimental effects to the threads. API co
45、uplings shall be blasted separately by means that do not cause detrimental effects to the threads. 5.2.6 Surface preparation procedures for premium connections shall be in accordance with the connection manufacturers recommendations. 5.2.7 Abrasive-blasted surfaces shall be cleaned of all blast prod
46、ucts with contaminant-free compressed air (see Paragraph 5.2.2) prior to plastic coating application. 5.2.8 Abrasive-blasted surfaces shall be coated within one hour of blasting if exposed to ambient climate conditions or within two hours of blasting if stored in a controlled environment of less tha
47、n 25% relative humidity. 5.2.9 The surface to be coated shall be visually inspected with a high-intensity light after it has been abrasive blasted. Tubular goods shall be inspected from both ends. Tubular goods or accessories that contain mill scale, corrosion products, old coating, or other foreign matter shall be reblasted and reinspected. In no case shall the plastic coating be applied if rusting or discoloration is evident. 5.2.10 New or used tubular good
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