1、Designation:G607(Reapproved 2013)Standard Test Method forAbrasion Resistance of Pipeline Coatings1This standard is issued under the fixed designation G6;the number immediately following the designation indicates the year of originaladoption or,in the case of revision,the year of last revision.Anumbe
2、r in parentheses indicates the year of last reapproval.Asuperscriptepsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method of accelerated test is a procedure fordetermining the relative resistance of steel pipeline coatings toabrasion by a slurry of c
3、oarse abrasive and water.The methodis intended to apply to the testing of all types of electricalinsulatingpipelinecoatingsandtapes,includingthermoplastics,thermoset,and bituminous materials.1.2 Pipeline coatings are not normally subjected to the typeof abrasion herein specified.1.3 Metallic protect
4、ive coatings such as zinc may be com-pared visually,but do not meet the electrical requirements ofthis test method.1.4 The values stated in SI units to three significant deci-mals are to be regarded as the standard.The values given inparentheses are for information only.1.5 This standard does not pu
5、rport to address all of thesafety concerns,if any,associated with its 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:2G12 T
6、est Method for Nondestructive Measurement of FilmThickness of Pipeline Coatings on Steel(Withdrawn2013)3G62 Test Methods for Holiday Detection in Pipeline Coat-ings3.Terminology3.1 Definitions:3.1.1 holidays,nsmall faults or pinholes which permitcurrent drainage through protective coatings on steel
7、pipe.4.Summary of Test Method4.1 Apparatus and materials are described whereby coatingson steel pipe are worn away by an abrasive slurry contained ina horizontally revolving drum.Specimens extend through bothends of the drum and are electrically insulated from contactwith the test apparatus.4.2 Peri
8、odic measurement of the electrical resistance be-tween the specimen and the drum indicates the degree ofabrasion resistance of the coating.5.Significance and Use5.1 This procedure defines a test method for comparing therelative resistance of pipeline coatings to abrasion.5.2 Abrasion resistance may
9、be used to specify optimumcoating thickness of candidate materials both in developmentand research work to study new coating systems or methodsand in quality control.6.Apparatus6.1 DrumA cylindrical steel container suitable for testingnine specimens simultaneously.Figs.1-3 show constructiondetails w
10、hich may be altered at the cap assembly if desired.Avalve shall be provided to release any pressure built up duringtest.6.2 Apparatus for Revolving the DrumAny suitable appa-ratus used to revolve the drum at 30.48 m(100 linear ft)/min.A modified jar rolling mill4has been found satisfactory forrevolv
11、ing the drum.6.3 Thickness Gage,to be used in accordance with TestMethod G12.6.4 Holiday Detectors,low-voltage wet-sponge type forthin film coatings(coatings thinner than 20 mils),and high-voltage type for thick film coatings(coatings thicker than 20mils).1This test method is under the jurisdiction
12、of ASTM Committee D01 on Paintand Related Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.48 on Durability of Pipeline Coating and Linings.Current edition approved June 1,2013.Published June 2013.Originallyapproved in 1969.Last previous edition approved in 200
13、7 as G6 07.DOI:10.1520/G0006-07R13.2For 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.3The last approved version of t
14、his historical standard is referenced onwww.astm.org.4The sole source of supply known to the committee at this time,to provide ameans for revolving the drum is Figure 801-V Jar Mill available from U.S.Stoneware,Inc.,Akron,OH.If you are aware of alternative suppliers,please providethis information to
15、 ASTM Headquarters.Your comments will receive carefulconsideration at a meeting of the responsible technical committee,1which you mayattend.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 NOTE1Low voltage detectors are used to locate pinh
16、oles,voids,orthin spots in pipeline coatings.The potential used with wet-spongedetectors can be up to 100 V DC.Procedures for using these detectors arefound in Method A of G62.For use of high voltage detectors operating inthe 900 to 20 000 Vdc range,see Method B of G62.6.5 Volt-ohm-meterAny electrical test instrument for mea-suring electrical resistance of the circuit.7.Reagents and Materials7.1 The test slurry shall consist of the following:7.1.1 Aluminum Oxide Grit,513.6 kg(30 lb).7.1.2 Tap Wa