1、Designation:C1618M19Standard Test Method forConcrete Sanitary Sewer Pipe by Negative(Vacuum)AirPressure(Metric)1This standard is issued under the fixed designation C1618M;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of la
2、st 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 test method covers procedures for testing of precastconcrete pipe sections,prior to delivery,where maximum fieldleakage
3、rates are specified.1.2 Tests described in this standard are intended to be usedat the point of manufacture of the concrete pipe and are notintended for testing installed pipe(for field tests see PracticesC969 and C1214).The user of this specification is advised thatindividual or multiple pipe secti
4、ons may be tested for thepurpose of testing the pipe barrel and additionally the joints instraight alignment when multiple pipe sections are tested.1.3 Test times are based on leakage rates and therefore areproportional only to the pipe diameter and are constant for anylength of test pipe or pipelin
5、e.1.4 Test times tabulated and the rate of air loss in thisstandard are based on successful testing of installed pipelines.However,since air and water have different physicalproperties,retests of some pipelines not meeting field air testshave been successful when tested with water.The leakage rateso
6、f 0.0017 CFM/ft2and 0.0003 CFM/ft2,were determinedempirically as the maximums for pipe to meet the 50 and 200gal/(in.of internal diameter)(mile of sewer)(24h)test rates,respectively1.5 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstand
7、ard.NOTE1The availability of this test procedure for concrete pipe variesfrom location to location.Check with local supplier(s)for availability andrecommendations.1.6 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the use
8、r of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.See Section 6 for specific safety precautions.1.7 This international standard was developed in accor-dance with internationally recognized pr
9、inciples 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:2C822 Terminology Relating to Conc
10、rete Pipe and RelatedProductsC969 Practice for Infiltration and Exfiltration AcceptanceTesting of Installed Precast Concrete Pipe Sewer LinesC1214 Test Method for Concrete Pipe Sewerlines by Nega-tive Air Pressure(Vacuum)Test Method3.Terminology3.1 DefinitionsFor definitions of terms related to prec
11、astconcrete pipe,see Terminology C822.4.Summary of Test Method4.1 The pipe to be tested shall be sealed at the outer endswith suitable airtight bulkheads.The change in the internalpressure during a specified time is used to determine theacceptability of the pipe.5.Significance and Use5.1 This is a q
12、uality test control performed at the manufac-turing plant to establish that the finished,shippable pipe meetsthe leakage limits stated in the specifications.6.Safety Precautions6.1 The user of this specification is advised of the following:6.1.1 This test may be dangerous if a pipe is not preparedpr
13、operly and proper procedures are not followed.6.1.2 No one should be allowed near the ends of the pipe ortest bulkheads during the test.1This test method is under the jurisdiction of ASTM Committee C13 onConcrete Pipe and is the direct responsibility of Subcommittee C13.09 on Methodsof Test.Current
14、edition approved Jan.1,2019.Published January 2019.Originallyapproved in 2005.Last previous edition approved in 2013 as C1618M 13.DOI:10.1520/C1618M-19.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandar
15、ds volume information,refer to the standards Document Summary page onthe ASTM websiteCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on stand
16、ardization 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.1 7.Apparatus7.1 The bulkheads used for negative pressure air tests do notrequire external restraints.7.2 The vacuum pump shall have adequate capacity toobtain the required test pressure.7.3 The test pressure shall be measured with a gage ormanometer that is precise enough to measure the incr
