1、Designation:C161813Standard Test Method forConcrete Sanitary Sewer Pipe by Negative(Vacuum)orPositive Air Pressure1This standard is issued under the fixed designation C1618;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of
2、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.Scope1.1 This test method covers procedures for testing of precastconcrete pipe sections,prior to delivery,where maximum fieldleakag
3、e 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 PracticesC924,C969,and C1214).The user of this specification isadvised that individual or multiple pip
4、e sections may be testedfor the purpose of testing the pipe barrel and additionally thejoints in straight alignment when multiple pipe sections aretested.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 p
5、ipeline.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
6、ratesof 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,respectively.1.5 The values stated in inch-pound units are to be regardedas standard.No other units of measurement are includ
7、ed in thisstandard.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 the safetyconcerns,if any,associated with its use.It is the responsibili
8、tyof the user of this standard to establish the appropriate safetyand health practices and to determine the applicability ofregulatory limitations prior to its use.See Section 6 for specificsafety precautions.2.Referenced Documents2.1 ASTM Standards:2C822 Terminology Relating to Concrete Pipe and Re
9、latedProductsC924 Practice for Testing Concrete Pipe Sewer Lines byLow-Pressure Air Test MethodC969 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.
10、Terminology3.1 DefinitionsFor definitions of terms related to precastconcrete 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 manufacturer shall chooseto use either low-pressure air or negative pressure
11、 air(vacuum)test methods to evaluate the condition of the pipe beforedelivery.The change in the internal pressure during a specifiedtime is used to determine the acceptability of the pipe.5.Significance and Use5.1 This is a quality control test performed at the manufac-turing plant to establish that
12、 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 preparedproperly and proper procedures are not followed.6.1.2 No one should be allowe
13、d 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 edition approved July 1,2013.Published December 2013.Originallyapproved in
14、2005.Last previous edition approved in 2013 as C1618 05(2013).DOI:10.1520/C1618-13.2For 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 on
15、the ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 7.Apparatus7.1 For positive air pressure test,one bulkhead shall includea remote controlled valve that will release the internal testpressure.7.2 For the low-pressure air te
16、st,tie rods or an external testframe that is designed to resist the force caused by internal airpressure shall be used to restrain the bulkheads.The low-pressure air test assembly shall be protected by a relief valveset to release at a pressure no greater than 6 psi.The bulkheadsused for negative pressure air tests do not require externalrestraints.7.3 The pressure or vacuum pumps shall have adequatecapacity to obtain the required test pressure.7.4 The test pressure shall be measured with a gage
