1、Designation: A862/A862M 98 (Reapproved 2014)Standard Practice forApplication of Asphalt Coatings to Corrugated Steel Sewerand Drainage Pipe1This standard is issued under the fixed designation A862/A862M; the number immediately following the designation indicates the yearof original adoption or, in t
2、he case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice covers the post coating of corrugated steelpipe and corrugated structur
3、al steel plate with asphalt materi-als. This practice is intended for shop-applied coating only.1.2 The values stated in either inch-pound units or SI unitsshall be regarded separately as standard. The values stated ineach system are not exact equivalents; therefore, use eachsystem independently of
4、the other, without combining values inany way. The SI units are shown in brackets in the text forclarity, but they are the applicable values when the applicationis to be performed using SI units.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use.
5、 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:2A849 Specification for Post-Applied Coatings, Pavings, andLinings for Corruga
6、ted Steel Sewer and Drainage Pipe3. Significance and Use3.1 Asphalt coating is used to provide additional protectionfor corrugated steel products (product) in corrosive or abrasiveenvironments, or both.4. Classification4.1 This practice covers three separate and distinct classifi-cations of coatings
7、. The general conditions under which thesecoatings are used are described in Specification A849.4.1.1 Classification A, Asphalt Coated A uniform coatingis applied to the interior and exterior of the product.4.1.2 Asphalt Coated with Paved Invert :4.1.2.1 Classification B1, Asphalt, Half Coated with
8、PavedInvertAuniform coating is applied to the interior and exteriorof the pipe covering at least 50 % of the circumference on thelower portion of the pipe as installed, and then a paving isapplied on the lower portion of the interior of the pipe asinstalled (the invert) to provide a smooth flow line
9、.4.1.2.2 Classification B2, Asphalt, Fully Coated with PavedInvertAuniform coating is applied to the interior and exteriorof the pipe, and then a paving is applied on the lower portionof the interior of the pipe as installed (the invert) to provide asmooth flow line.4.1.3 Classification C, Asphalt C
10、oated and LinedA uni-form coating is applied to the interior and exterior of the pipe,and then a lining is applied to fill the corrugations on the fullinterior of the pipe to provide a smooth interior.NOTE 1This coating is sometimes referred to as any of the following:asphalt coated and lined, aspha
11、lt coated and fully paved, asphalt coatedand 100 % paved, or asphalt coated smooth flow. The term “bituminous”is sometimes used instead of asphalt.5. Materials5.1 The coating and lining material shall be in conformancewith the requirements for asphalt material in SpecificationA849.6. Tank Control an
12、d Maintenance6.1 Tank Temperature The asphalt temperature in the tankshall be maintained between 392 and 410F 200 and 210Cduring the coating operation.6.2 Tank Cleanliness:6.2.1 The asphalt in the tank shall be kept free of contami-nants such as dirt, drum paper, and asphalt drippings from theshop f
13、loor.6.2.2 The asphalt tank shall be cleaned as necessary with aminimum frequency of once per year.6.2.3 The foam that results from the inadvertent introduc-tion of moisture to the tank shall be skimmed off or moved tothe side of the tank before inserting or extracting the product.1This practice is
14、under the jurisdiction of ASTM Committee A05 on Metallic-Coated Iron and Steel Products and is the direct responsibility of SubcommitteeA05.17 on Corrugated Steel Pipe Specifications.Current edition approved May 1, 2014. Published May 2014. Originallyapproved in 1986. Last previous edition approved
15、in 2008 as A862/A862M - 98(2008). DOI: 10.1520/A0862_A0862M-98R14.2For 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 web
16、site.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States17. Procedure7.1 Coating ApplicationApply the asphalt coating byinserting the product into the bath twice; the first applicationresults in a thin coating to achieve very good adheren
17、ce, andthe second achieves the coating thickness required by Specifi-cation A849.7.1.1 Steel surfaces shall be free of dirt, grease, dust, andmoisture before placement in the asphalt bath. The productshall be prepared immediately prior to the coating operation.7.1.2 Rotate large structures in the ta
18、nk to ensure that allsurfaces are coated.7.1.3 The product must remain in the tank until it achievesa minimum temperature of 375F 190C. The specific timerequirements will depend on factors unique to each operationand the product being coated. The time to reach the requiredtemperature is dependent on
19、 the initial temperature of theproduct, the steel thickness, the size of the product, and thevolume of the tank.7.1.4 The following table contains minimum immersiontimes:Steel Thickness, in. mm Time, min0.052 1.32 2 to 2.50.064 1.63 2.5 to 30.079 2.01 3.5 to 50.109 2.77 5 to 60.138 3.50 6.5 to 80.16
20、8 4.27 8 to 147.1.5 Cool the product to ambient temperature before appli-cation of the second coating.7.1.6 Insert the product a second time to provide theminimum thickness on each surface.7.2 Paving:7.2.1 Pave the interior of the coated pipe by applying the hotasphalt from the tank to the interior
21、surface of the pipe toprovide a thickness over the crest of the corrugation as requiredby Specification A849. Pump the hot asphalt to the pipe byappropriate mechanical means, not by transfer with buckets.The asphalt used for paving shall be a least 395F 200C toensure good adhesion to the coated pipe
22、. Pave the pipe as soonas possible after coating to avoid poor adhesion associated withthe accumulation of dirt and other residue on the coatingsurface.NOTE 2Steam, hot oil jacketing, or high-temperature electric tape isrecommended to keep the asphalt system free flowing. For furtherinformation on t
23、he selection of application equipment, consult a producerof asphalt products.7.2.2 Place end dams of wood or heavy paper at the ends ofthe pipe to retain the asphalt in the pipe. Three or moreapplications are usually required for most operations.7.3 Smooth Lining:7.3.1 Line the interior of the pipe
24、that has been coated bycovering the corrugations with hot asphalt. Provide a thicknessover the crest of the corrugations as required by SpecificationA849.7.3.2 Spray the hot asphalt, taken from the tank, whilerotating the pipe on a powered rotary device to provide auniform smooth lining.7.4 Storage
25、and Handling:7.4.1 Store and handle the coated product properly to avoidbruising, scaling, or scuffing of the asphalt coating. At thefabricators option, spray inorganic materials such as lime(whitewash), chalk, or silica dust on the exterior asphaltsurfaces after cooling to prevent removal of the ta
26、cky coatingwhen sections of pipe are stored in contact with each other.These inorganic coatings also help to lower the surfacetemperature of the pipe during storage.7.4.2 Install and backfill asphalt-coated corrugated steelproduct as soon as possible to avoid the damage due to infraredradiation. Inf
27、rared radiation volatizes the thin oils in the asphaltwhich dries the coating and promotes cracking. Product in-stalled in situations where prolonged exposure to the suns raysis unavoidable (that is, aerial sewer), and cracking of theasphalt coating is possible, shall be coated with supplementalcoat
28、ings such as aluminum-rich paints.7.5 RepairRepair damaged coatings with a cold-appliedasphalt mastic material described in Specification A849.8. Keywords8.1 asphalt coated steel pipe; asphalt coating; asphalt coat-ing repair; coating application; corrugated steel pipe; pavedinvert; protective coati
29、ngs; smooth linedASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of
30、 such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for a
31、dditional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to
32、 the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).A862/A862M 98 (2014)2
