1、Designation: F2831 12 (Reapproved 2017)Standard 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 ye
2、ar 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 intended to establish the minimumcri
3、teria necessary for 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
4、 of the piping system 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 u
5、ser.1.2 The values 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,
6、associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety, health, and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationall
7、y recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2D1600 Terminol
8、ogy forAbbreviated Terms Relating to Plas-ticsD3359 Test Methods for Rating 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
9、) Zinc-Rich Primers by Solvent RubD4414 Practice for Measurement 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 : M
10、anual of WaterSupply Practices M28, Appendix2.3 NSF Standard: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
11、cleaning3. Terminology3.1 DefinitionsDefinitions are in accordance with Termi-nology and abbreviations are in accordance with TerminologyD1600, unless otherwise specified.3.2 Definitions:3.2.1 accredited certifying organization, nan agency ac-credited by an independent and authoritative conformity a
12、s-sessment body (ANSI, ISO/ICC or equivelant) to 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 Ma
13、ins.)1This practice is under the jurisdiction of ASTM Committee F17 on PlasticPiping Systems and is the direct responsibility of Subcommittee F17.67 onTrenchless Plastic Pipeline Technology.Current edition approved Nov. 1, 2017. Published November 2017. Originallyapproved in 2011. Last previous edit
14、ion approved in 2012 as F283112. DOI:10.1520/F283112R17.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Avai
15、lable from American Water Works Association (AWWA), 6666 W. QuincyAve., Denver, CO 80235, http:/www.awwa.org.4Available from NSF International, 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 Flo
16、or,Pittsburgh, PA 15222-4656, http:/www.sspc.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationa
17、lly recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.13.2.3 listed (third- party certified), adjequipment or
18、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 ormaterial complies with approved standards or has been te
19、stedand 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 wrought iron blacksteel, stainless steel, copper, brass or similar metal pipingsystems.4.
20、 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 or the health effects portion of NSF/ANSI 14 byan accredited certifying organizatio
21、n.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 shall be listed and identified forthe type of application (“blow through”, spin ca
22、st 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 pressurizedpiping systems.6. Coating Application6.1 GeneralThe epoxy coating shall be appli
23、ed 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 6-in. diameter pipe and shall beapplied from small diameter to large. Spin cast ap
24、plicationsshall 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 pieces of pipe shall beinstalled within the network architecture for subsequent third
25、party 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 1 to remove oil, grease, or other foreign matter.Only solvents approved by the epo
26、xy 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 leaks in the piping system shall be repaired in accordancewith the manufacturers re
27、commendations 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 cleaning and coating shall only be performedwhen the metal temperature is more than 5
28、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, to ensure all foreign material on thewall of the pipe is removed.6.4 Pipe Cleaning
29、A 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 previously appliedcoatings. Evenly dispersed, very light shadows, streaks, anddiscolorat
30、ions 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 observa-tion of the cleaned pipe to be recorded.6.5 Interior cleaningIf abrasives o
31、r 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 surface. Alternatively, vacuum cleaning or other meth-ods may be used in place of c
32、ompressed 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 a wet film thickness gauge,meeting Practice D4414-Standard Practice for Measuremen
33、t 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 when the temperature ismore than 5F (2.8C) above dew point. The temperature of the
34、mixed 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 be consulted as tothe proper cure time and methods but The minimum cure time,cure te
35、mperature and flushing requirements shall be in accor-dance with certification and listing requirements appropriatefor the application. For potable water applications, minimumcure time, cure temperature and flushing requirements shall bein accordance with the NSF/ANSI 61 certification and listingreq
36、uirements 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 proper coating thickness and adhesion. A visualinspection at of the entrance and exit po
37、ints 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 ofinspection). Also at completion of installation an air test orF2831 12 (2017)2hydrostatic test s
38、hall 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 inpressure. In addition the completed system shall be flow testedand the piping
39、system shall be required to meet the minimumflow rates as specified in the model codes (UPC, IPC, NSPC,NPC ) adopted by the local jurisdiction.TEST METHODS7. General Requirements7.1 Minimum Coating ThicknessThe minimum coatingthickness shall be as specified by the manufacturer but shall benot less t
40、han 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 for eachpiping material specified by the manufacturer. Each of thesamples shall be
41、 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 Verification TestA test assembly shall be setup for coating utilizing five 10 f
42、t lengths of 1-in. diameter pipewith fittings attached to simulate actual installation. The testassembly pipes and fittings shall be coated in accordance withthe coating tables in the manufacturers installation instruc-tions. The coated pipes and fittings shall be allowed to dry atroom temperature f
43、or at least 24 h. The thickness of the coatingshall be measured at the inlet and outlet ends of the testassemblies and the last fitting shall be removed and axiallysectioned for thickness testing along its length. The coatingthickness shall be equal to or greater than the minimum coatingthickness sp
44、ecified by the manufacturer.Amathematical evalu-ation of the coating tables in the manufacturers installationinstructions shall be performed, based on the test results for the1-inch pipe, to establish that the minimum coating will beprovided. Maximum thicknesses are determined on an averagebasis and
45、 are 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-force without loss of coatingadhesion shall be 2500 psi.8
46、.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 adhesion of the coating to thepiping material shall mee
47、t 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 the solvent rub test or Test Method D3363 for thepencil
48、 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, ringing, cuts orocclusions. In the event of such discrepan
49、cies 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 onceannually 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 annual
