1、Designation: F2831 11Standard 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 the designation indicates the year oforiginal adop
2、tion 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. Scope1.1 This standard is intended to establish the minimumcriteria necessary for
3、 use of a mechanically mixed, blended,epoxy barrier coating (AWWA Class I) that is applied to theinterior of12 in. to 36 in. metallic pipe or tube used inpressurized piping systems for corrosion protection and toimprove flow rates. There is no restriction as to the developedlength of the piping syst
4、em other than the method of applica-tion (“blow through”, spin cast or hand sprayed) and thecharacteristics of the epoxy coating being applied but themanufacturers engineer shall be consulted for any limitationsassociated with this product, process and its application for theend user.1.2 The values
5、stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its
6、 use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D1600 Terminology for Abbreviated Terms Relating toPlasticsD3359 Test Me
7、thods for Measuring Adhesion by Tape TestD3363 Test Method for Film Hardness by Pencil TestD4541 Test Method for Pull-Off Strength of Coatings UsingPortable Adhesion TestersD4752 Practice for Measuring MEK Resistance of EthylSilicate (Inorganic) Zinc-Rich Primers by Solvent RubD4414 Practice for Mea
8、surement of Wet Film Thickness byNotch GagesF412 Terminology Relating to Plastic Piping Systems2.2 AWWA Standard:3AWWA C210 Liquid Epoxy Coating Systems for theInterior and Exterior of Steel Water PipelinesAWWA Rehabilitation of Water Mains : Manual of WaterSupply Practices M28, Appendix2.3 NSF Stan
9、dard:4NSF/ANSI 61 Drinking Water System Components Health EffectsNSF/ANSI 14 Plastic Piping System Components and Re-lated Materials2.4 Society of Protective Coatings Standards:5SSPC-SP 1 Solvent Cleaning SSSPC-SP 6/NACE No. 3 Commercial blast cleaning3. Terminology3.1 DefinitionsDefinitions are in
10、accordance with Termi-nology F412 and abbreviations are in accordance with Termi-nology D1600, unless otherwise specified.3.2 Definitions:3.2.1 accredited certifying organization, nan agency ac-credited by an independent and authoritative conformity as-sessment body (ANSI, ISO/ICC or equivelant) to
11、operate amaterial and product listing and labeling (certification) systemthat is accepted by the Authority Having Jurisdiction.3.2.2 AWWA class I linings, nNon-structural systems,such as traditional CML and epoxy. (See AWWA Rehabilita-tion of Water Mains.)3.2.3 listed (third- party certified), adjeq
12、uipment or ma-terials included in a list published by a listing agency (accred-ited conformity assessment body) that maintains periodicinspection on current production of listed equipment or mate-rials and whose listing states either that the equipment or1This practice is under the jurisdiction of A
13、STM Committee F17 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17.67 onTrenchless Plastic Pipeline Technology.Current edition approved May 1, 2011. Published May 2011. DOI: 10.1520/F283111.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact A
14、STM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from American Water Works Association (AWWA), 6666 W. QuincyAve., Denver, CO 80235, http:/www.awwa.org.4Available from NSF Internat
15、ional, P.O. Box 130140, 789 N. Dixboro Rd., AnnArbor, 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.org.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA
16、 19428-2959, United States.material complies with approved standards or has been testedand found suitable for use in a specified manner.3.2.4 metallic piping, na tubular shape made of metal,intended to convey fluids or gas. Usually semi-rigid or rigidmetal such as galvanized steel, galvanized wrough
17、t iron blacksteel, stainless steel, copper, brass or similar metal pipingsystems.4. Material Requirements4.1 When applied to potable water systems, epoxy barriercoatings shall be evaluated, tested and certified for confor-mance to NSF/ANSI 61, Section 5 for the intended application,field or factory
18、or the health effects portion of NSF/ANSI 14 byan accredited certifying organization.4.2 Epoxy barrier coatings shall be prepared for applicationusing mechanically engineered metering and mixing methodsto ensure mixing and dispensing controls to manufacturersspecifications.4.3 Epoxy barrier coatings
19、 shall be listed and identified forthe type of application (“blow through”, spin cast or handsprayed).5. Significance and Use5.1 This practice is for use by designers and specifiers,regulatory agencies, owners, contractors, and inspection orga-nizations who are involved in rehabilitation of pressuri
20、zedpiping systems.6. Coating Application6.1 GeneralThe epoxy coating shall be applied in accor-dance with the manufacturers recommendations. Applicationshall be by blow through, airless-spray or centrifugal-wheelequipment or manufacturer-certified equal. “Blow through”application shall be limited to
21、 6-in. diameter pipe and shall beapplied from small diameter to large. Spin cast applicationsshall be pre-planned in accordance with the manufacturersrecommendations, which are dependent on pipeline diameter,length and architecture and shall be applied at change ofdiameter both ways. Random spool pi
22、eces of pipe shall beinstalled within the network architecture for subsequent thirdparty inspection when required or specified by owners or theirdesignated representatives.6.2 Piping preparationPrior to abrasive blast cleaning,surfaces shall be inspected and, if required, cleaned accordingto SSPC-SP
23、 1 to remove oil, grease, or other foreign matter.Only solvents approved by the epoxy coating manufacturershall be used. Preheating of metallic type piping to remove oil,grease, mill scale, water, and ice may be used provided the pipeis preheated in a uniform manner to avoid distorting the pipe.All
24、leaks in the piping system shall be repaired in accordancewith the manufacturers recommendations prior to coating.6.3 Abrasive blast cleaningThe interior of the pipingsystem surfaces shall be abrasive blast cleaned to achieve aclean metal surface conforming to SSPC-SP 6/NACE. No. 3Abrasive blast cle
25、aning and coating shall only be performedwhen the metal temperature is more than 5 F (2.9C) abovedew point. When required to meet the standard, or as requiredby manufacturers instructions, the cleaning process shall beconducted both ways, from small diameter to large and fromlarge diameter to small,
26、 to ensure all foreign material on thewall of the pipe is removed.6.4 Pipe CleaningA description of the quality and clean-liness of the pipe to be coated shall be required. When viewedwithout magnification, the cleaned surface shall be free of allvisible oil, grease, dirt, mill scale, rust and previ
27、ously appliedcoatings. Evenly dispersed, very light shadows, streaks, anddiscolorations caused by stains of mill scale, rust and oldcoatings shall be permitted to remain on no more than 33percent of the surface to be coated. The manufacturersinstructions shall require that the details of the visual
28、observa-tion of the cleaned pipe to be recorded.6.5 Interior cleaningIf abrasives or other loose foreignmatter has entered the interior of the piping system, then clean,dry, oil-free compressed air shall be used to remove the looseforeign matter in a manner that does not adversely affect thecleaned
29、surface. Alternatively, vacuum cleaning or other meth-ods may be used in place of compressed air.6.6 Coating thicknessThe minimum coating thicknessshall be recommended by the coating manufacturer but shall begreater than 0.01 in. (0.2454 mm). The coating thickness shallbe determined in the field via
30、 a wet film thickness gauge,meeting Practice D4414-Standard Practice for Measurement ofWet Film Thickness of Organic Coatings by Notched Gages.6.7 Coating material preparation. Coating material prepara-tion shall be in accordance with the manufacturers recommen-dation. Application shall be performed
31、 when the temperature ismore than 5F (2.8C) above dew point. The temperature of themixed coating material shall not be lower than 50F (10C).The temperature of the piping system during application shallconform to the recommendations of the coating manufacturer.6.8 CureThe coating manufacturer shall b
32、e consulted asto the proper cure time and methods but The minimum curetime, cure temperature and flushing requirements shall be inaccordance with certification and listing requirements appro-priate for the application. For potable water applications,minimum cure time, cure temperature and flushing r
33、equire-ments shall be in accordance with the NSF/ANSI 61 certifica-tion and listing requirements for the epoxy.6.9 Field TestingAt completion of installation, the pipespool pieces randomly inserted into the piping network prior tocoating shall be removed for third party inspection andreporting for p
34、roper coating thickness and adhesion. A visualinspection at of the entrance and exit points shall also be madeby a qualified, third-party inspector. CCTV shall be used toinspect pipe diameters of sizes 2 inches and above and a handheld bore scope used on12 to 2 in. (4 foot maximum length ofinspectio
35、n). Also at completion of installation an air test orhydrostatic test shall be conducted on the piping system.An airtest of 150 psig or hydrostatic test of 112 times the normalworking pressure shall be put on the system for a minimum ofone hour to assure there are no leaks or observed drop inpressur
36、e. In addition the completed system shall be flow testedand the piping system shall be required to meet the minimumflow rates as specified in the model codes (UPC, IPC, NSPC,NPC ) adopted by the local jurisdiction.F2831 112TEST METHODS7. General Requirements7.1 Minimum Coating ThicknessThe minimum c
37、oatingthickness shall be as specified by the manufacturer but shall benot less than that specified in section 6.6 of the standard.Testing in accordance with 8.1 shall verify performance of theepoxy barrier coating material at the minimum thickness. .7.2 Samples: Six test samples shall be prepared fo
38、r eachpiping material specified by the manufacturer. Each of thesamples shall be coated according to the manufacturersinstallation instructions and allowed to cure for 24 hours atroom temperature. The samples shall be subjected to the testspecified in 8.2-8.4.8. Performance Requirements8.1 Thickness
39、 Verification TestAtest assembly shall be setup for coating utilizing a 1-in. diameter pipe that is 50 ft inlength. Fittings shall be used to simulate an actual installation.The test assembly shall be coated in accordance with thecoating tables in the manufacturers installation instructions.The coat
40、ed assembly shall be allowed to dry at room tempera-ture for at least 24 h. The thickness of the coating shall bemeasured at the inlet and outlet ends of the test assembly andthe last fitting shall be removed and axially sectioned forthickness testing along its length. The coating thickness shallbe
41、equal to or greater than the minimum coating thicknessspecified by the manufacturer. A mathematical evaluation ofthe coating tables in the manufacturers installation instructionsshall be performed, based on the test results for the 1-inch pipe,to establish that the minimum coating will be provided.M
42、aximum thicknesses are determined on an average basis andare addressed in NSF/ANSI 61.8.2 Pull-off Strength TestA sample shall be tested forresistance to pull-off of the epoxy barrier coating in accordancewith Test Method D4541. On metallic surfaces, such as copper,steel or brass, the minimum pull-f
43、orce without loss of coatingadhesion shall be 2500 psi.8.3 Immersion TestA sample shall be tested in accordancewith AWWA C210. The sample shall display no blistering,peeling or disbondment of the epoxy barrier coating.8.4 Adhesion TestA sample shall be tested in accordancewith Test Method D3359. The
44、 adhesion of the coating to thepiping material shall meet a minimum rating of 4Awhen testedto Method A of the standard.8.5 CuringThe epoxy shall be cured per the manufactur-ers specifications. Upon completion of the curing process, thesample shall meet the requirements of either Test MethodD4752 for
45、 the solvent rub test or Test Method D3363 for thepencil hardness test.8.6 Visual inspectionDuring visual inspection of thecoated pipe or samples using CCTV, bore scope or other visualaids, the coating shall exhibit an even application with no signsof blisters, sags, uncoated metal, delamination, ri
46、nging, cuts orocclusions. In the event of such discrepancies the manufactur-ers engineer shall be consulted to provide the owner withrespect to corrective action.9. Quality Control9.1 The epoxy components shall be manufactured under anapproved quality control program with inspections at least oncean
47、nually by an inspection agency accredited by the Interna-tional Accreditation Service (IAS). A full re-test of all perfor-mance requirements shall be required at a minimum of onceevery 5 years. Epoxy coatings used with potable water pipingsystems shall have chemical extraction test annually verifyin
48、gcontinued compliance with Section 5 of NSF/ANSI 61.9.2 All applicators/contractors shall be trained and certifiedby the manufacturer prior to any application.9.3 All equipment used by the applicators/contractors shallalso be certified by the manufacturer and be subject to annualcalibration.10. Prod
49、uct Marking10.1 All epoxy containers shall bear the following mark-ings, affixed by label:10.2 Manufacturers name or trademark,10.3 Certified to ASTM F2831, and,10.4 Internally coated pipe and tubing shall be permanentlyand legibly marked at each outlet and on the outside of exposedpipe with the following markings applied at 20-ft intervals:Manufacturers name or trademark and coating designation andmaterial with prohibition on the use of flame and heat to repairany part of system.11. Product Information11.1 The minimum barrier c
