1、Designation:A862/A862M98(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 the ca
2、se 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 structural steel p
3、late 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 the other,with
4、out 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.It is theresponsibi
5、lity 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 Corrugated Steel Sewer and Dra
6、inage 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.The general conditions unde
7、r 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 PavedInvertAuniform coating is ap
8、plied 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.4.1.2.2 Classification B2,Asphalt,Ful
9、ly 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 Coated and LinedA uni-form coating is applied
10、 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.NOTE1This coating is sometimes referred to as any of the following:asphalt coated and lined,asphalt coated and fully paved,asphalt coatedand 10
11、0%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 and Maintenance6.1 Tank Temperature The asphalt temperat
12、ure 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 floor.6.2.2 The asphalt tank shall be cleaned as necessar
13、y 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 under the jurisdiction of ASTM Committee A05 on Metallic
14、-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 in 2008 as A862/A862M-98(2008).DOI:10.1520/A0862_A0862M-98R1
15、4.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,W
16、est Conshohocken,PA 19428-2959.United States1 7.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 adherence,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
