1、Designation:F283111 Designation: F2831 12An American National StandardStandard Practice forInternal Non Structural Epoxy Barrier Coating Material UsedIn Rehabilitation of Metallic Pressurized Piping Systems1This standard is issued under the fixed designation F2831; the number immediately following t
2、he designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This standard is inten
3、ded to establish the minimum criteria necessary for use of a mechanically mixed, blended, epoxybarrier coating (AWWA Class I) that is applied to the interior of12 in. to 36 in. metallic pipe or tube used in pressurized pipingsystems for corrosion protection and to improve flow rates. There is no res
4、triction as to the developed length of the piping systemother than the method of application (“blow through”, spin cast or hand sprayed) and the characteristics of the epoxy coating beingapplied but the manufacturers engineer shall be consulted for any limitations associated with this product, proce
5、ss and itsapplication for the end user.1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information only and are not considered standard.1.3 This standard does not purport to addres
6、s all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D1600 Terminology
7、for Abbreviated Terms Relating to PlasticsD3359 Test Methods for Measuring Adhesion by Tape TestD3363 Test Method for Film Hardness by Pencil TestD4541 Test Method for Pull-Off Strength of Coatings Using Portable Adhesion TestersD4752 Practice for Measuring MEK Resistance of Ethyl Silicate (Inorgani
8、c) Zinc-Rich Primers by Solvent RubD4414 Practice for Measurement of Wet Film Thickness by Notch GagesF412 Terminology Relating to Plastic Piping Systems2.2 AWWA Standard:3AWWA C210 Liquid Epoxy Coating Systems for the Interior and Exterior of Steel Water PipelinesAWWA Rehabilitation of Water Mains
9、: Manual of Water Supply Practices M28, Appendix2.3 NSF Standard:4NSF/ANSI 61 Drinking Water System Components Health EffectsNSF/ANSI 14 Plastic Piping System Components and Related Materials2.4 Society of Protective Coatings Standards:5SSPC-SP 1 Solvent Cleaning SSSPC-SP 6/NACE No. 3 Commercial bla
10、st cleaning3. Terminology3.1 DefinitionsDefinitions are in accordance with Terminology F412 and abbreviations are in accordance with TerminologyD1600, unless otherwise specified.1This practice is under the jurisdiction of ASTM Committee F17 on Plastic Piping Systems and is the direct responsibility
11、of Subcommittee F17.67 on Trenchless PlasticPipeline Technology.Current edition approved May 1, 2011. Published May 2011. DOI: 10.1520/F283111.Current edition approved April 1, 2012. Published May 2012. Originally approved in 2011. Last previous edition approved in 2011 as F283111. DOI: 10.1520/F283
12、112.2For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3Available from American Water Works Association (AWWA)
13、, 6666 W. Quincy Ave., Denver, CO 80235, http:/www.awwa.org.4Available from NSF International, P.O. Box 130140, 789 N. Dixboro Rd., Ann Arbor, MI 48113-0140, http:/www.nsf.org.5Available from Society for Protective Coatings (SSPC), 40 24th St., 6th Floor, Pittsburgh, PA 15222-4656, http:/www.sspc.or
14、g.1This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior
15、editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428
16、-2959, United States.3.2 Definitions:3.2.1 accredited certifying organization, nan agency accredited by an independent and authoritative conformity assessmentbody (ANSI, ISO/ICC or equivelant) to operate a material and product listing and labeling (certification) system that is acceptedby the Author
17、ity Having Jurisdiction.3.2.2 AWWA class I linings, nNon-structural systems, such as traditional CML and epoxy. (See AWWA Rehabilitation ofWater Mains.)3.2.3 listed (third- party certified), adjequipment or materials included in a list published by a listing agency (accreditedconformity assessment b
18、ody) that maintains periodic inspection on current production of listed equipment or materials and whoselisting states either that the equipment or material complies with approved standards or has been tested and found suitable for usein a specified manner.3.2.4 metallic piping, na tubular shape mad
19、e of metal, intended to convey fluids or gas. Usually semi-rigid or rigid metal suchas galvanized steel, galvanized wrought iron black steel, stainless steel, copper, brass or similar metal piping systems.4. Material Requirements4.1 When applied to potable water systems, epoxy barrier coatings shall
20、 be evaluated, tested and certified for conformance toNSF/ANSI 61, Section 5 for the intended application, field or factory or the health effects portion of NSF/ANSI 14 by an accreditedcertifying organization.4.2 Epoxy barrier coatings shall be prepared for application using mechanically engineered
21、metering and mixing methods toensure mixing and dispensing controls to manufacturers specifications.4.3 Epoxy barrier coatings shall be listed and identified for the type of application (“blow through”, spin cast or hand sprayed).5. Significance and Use5.1 This practice is for use by designers and s
22、pecifiers, regulatory agencies, owners, contractors, and inspection organizationswho are involved in rehabilitation of pressurized piping systems.6. Coating Application6.1 GeneralThe epoxy coating shall be applied in accordance with the manufacturers recommendations. Application shallbe by blow thro
23、ugh, airless-spray or centrifugal-wheel equipment or manufacturer-certified equal. “Blow through” applicationshall be limited to 6-in. diameter pipe and shall be applied from small diameter to large. Spin cast applications shall be pre-plannedin accordance with the manufacturers recommendations, whi
24、ch are dependent on pipeline diameter, length and architecture andshall be applied at change of diameter both ways. Random spool pieces of pipe shall be installed within the network architecturefor subsequent third party inspection when required or specified by owners or their designated representat
25、ives.6.2 Piping preparationPrior to abrasive blast cleaning, surfaces shall be inspected and, if required, cleaned according toSSPC-SP 1 to remove oil, grease, or other foreign matter. Only solvents approved by the epoxy coating manufacturer shall be used.Preheating of metallic type piping to remove
26、 oil, grease, mill scale, water, and ice may be used provided the pipe is preheated ina uniform manner to avoid distorting the pipe. All leaks in the piping system shall be repaired in accordance with themanufacturers recommendations prior to coating.6.3 Abrasive blast cleaningThe interior of the pi
27、ping system surfaces shall be abrasive blast cleaned to achieve a clean metalsurface conforming to SSPC-SP 6/NACE. No. 3 Abrasive blast cleaning and coating shall only be performed when the metaltemperature is more than 5 F (2.9C) above dew point. When required to meet the standard, or as required b
28、y manufacturersinstructions, the cleaning process shall be conducted both ways, from small diameter to large and from large diameter to small,to ensure all foreign material on the wall of the pipe is removed.6.4 Pipe CleaningAdescription of the quality and cleanliness of the pipe to be coated shall
29、be required. When viewed withoutmagnification, the cleaned surface shall be free of all visible oil, grease, dirt, mill scale, rust and previously applied coatings.Evenly dispersed, very light shadows, streaks, and discolorations caused by stains of mill scale, rust and old coatings shall bepermitte
30、d to remain on no more than 33 percent of the surface to be coated. The manufacturers instructions shall require that thedetails of the visual observation of the cleaned pipe to be recorded.6.5 Interior cleaningIf abrasives or other loose foreign matter has entered the interior of the piping system,
31、 then clean, dry,oil-free compressed air shall be used to remove the loose foreign matter in a manner that does not adversely affect the cleanedsurface. Alternatively, vacuum cleaning or other methods may be used in place of compressed air.6.6 Coating thicknessThe minimum coating thickness shall be
32、recommended by the coating manufacturer but shall be greaterthan 0.01 in. (0.2454 mm). The coating thickness shall be determined in the field via a wet film thickness gauge, meeting PracticeD4414-Standard Practice for Measurement of Wet Film Thickness of Organic Coatings by Notched Gages.6.7 Coating
33、 material preparation. Coating material preparation shall be in accordance with the manufacturers recommendation.Application shall be performed when the temperature is more than 5F (2.8C) above dew point. The temperature of the mixedcoating material shall not be lower than 50F (10C). The temperature
34、 of the piping system during application shall conform tothe recommendations of the coating manufacturer.6.8 CureThe coating manufacturer shall be consulted as to the proper cure time and methods but The minimum cure time,cure temperature and flushing requirements shall be in accordance with certifi
35、cation and listing requirements appropriate for theF2831 122application. For potable water applications, minimum cure time, cure temperature and flushing requirements shall be in accordancewith the NSF/ANSI 61 certification and listing requirements for the epoxy.6.9 Field TestingAt completion of ins
36、tallation, the pipe spool pieces randomly inserted into the piping network prior tocoating shall be removed for third party inspection and reporting for proper coating thickness and adhesion. A visual inspectionat of the entrance and exit points shall also be made by a qualified, third-party inspect
37、or. CCTV shall be used to inspect pipediameters of sizes 2 inches and above and a hand held bore scope used on12 to 2 in. (4 foot maximum length of inspection). Alsoat completion of installation an air test or hydrostatic test shall be conducted on the piping system. An air test of 150 psig orhydros
38、tatic test of 112 times the normal working pressure shall be put on the system for a minimum of one hour to assure thereare no leaks or observed drop in pressure. In addition the completed system shall be flow tested and the piping system shall berequired to meet the minimum flow rates as specified
39、in the model codes (UPC, IPC, NSPC, NPC ) adopted by the localjurisdiction.TEST METHODS7. General Requirements7.1 Minimum Coating ThicknessThe minimum coating thickness shall be as specified by the manufacturer but shall be notless than that specified in section 6.6 of the standard. Testing in accor
40、dance with 8.1 shall verify performance of the epoxy barriercoating material at the minimum thickness. .7.2 Samples: Six test samples shall be prepared for each piping material specified by the manufacturer. Each of the samples shallbe coated according to the manufacturers installation instructions
41、and allowed to cure for 24 hours at room temperature. Thesamples shall be subjected to the test specified in 8.2-8.4.8. Performance Requirements8.1 Thickness Verification TestA test assembly shall be set up for coating utilizing a 1-in. diameter pipe that is 50 ft in length.Fittings shall be used fi
42、ve 10 ft lengths of 1-in. diameter pipe with fittings attached to simulate an actual installation. The testassembly pipes and fittings shall be coated in accordance with the coating tables in the manufacturers installation instructions. Thecoated assembly pipes and fittings shall be allowed to dry a
43、t room temperature for at least 24 h. The thickness of the coating shallbe measured at the inlet and outlet ends of the test assemblyassemblies and the last fitting shall be removed and axially sectionedfor thickness testing along its length. The coating thickness shall be equal to or greater than t
44、he minimum coating thicknessspecified by the manufacturer. A mathematical evaluation of the coating tables in the manufacturers installation instructions shallbe performed, based on the test results for the 1-inch pipe, to establish that the minimum coating will be provided. Maximumthicknesses are d
45、etermined on an average basis and are addressed in NSF/ANSI 61.8.2 Pull-off Strength TestA sample shall be tested for resistance to pull-off of the epoxy barrier coating in accordance withTest Method D4541. On metallic surfaces, such as copper, steel or brass, the minimum pull-force without loss of
46、coating adhesionshall be 2500 psi.8.3 Immersion TestA sample shall be tested in accordance with AWWA C210. The sample shall display no blistering, peelingor disbondment of the epoxy barrier coating.8.4 Adhesion TestA sample shall be tested in accordance with Test Method D3359. The adhesion of the co
47、ating to the pipingmaterial shall meet a minimum rating of 4A when tested to Method A of the standard.8.5 CuringThe epoxy shall be cured per the manufacturers specifications. Upon completion of the curing process, the sampleshall meet the requirements of either Test Method D4752 for the solvent rub
48、test or Test Method D3363 for the pencil hardnesstest.8.6 Visual inspectionDuring visual inspection of the coated pipe or samples using CCTV, bore scope or other visual aids, thecoating shall exhibit an even application with no signs of blisters, sags, uncoated metal, delamination, ringing, cuts or
49、occlusions.In the event of such discrepancies the manufacturers engineer shall be consulted to provide the owner with respect to correctiveaction.9. Quality Control9.1 The epoxy components shall be manufactured under an approved quality control program with inspections at least onceannually by an inspection agency accredited by the International Accreditation Service (IAS). A full re-test of all performancerequirements shall be required at a minimum of once every 5 years. Epoxy coatings used with potable water piping systems s
