ASTM_C_1091_-_03a_2013.pdf

Designation:C109103a(Reapproved 2013)Standard Test Method forHydrostatic Infiltration Testing of Vitrified Clay Pipe Lines1This standard is issued under the fixed designation C1091;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of 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 defines procedures for hydrostaticinfiltration testing of new installations of vitrified clay pipelines,to demonstrate the structural integrity of the installedline.Refer to Practice C12.1.2 This test method is suitable for testing gravity-flow pipelines constructed of vitrified clay pipe or combinations of claypipe and other pipe materials.1.3 This test method is applicable to the testing of the pipelines only.Manholes or other structures should be testedseparately.1.4 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.5 This standard does not purport to address all of thesafety problems,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:2C12 Practice for Installing Vitrified Clay Pipe LinesC828 Test Method for Low-Pressure Air Test of VitrifiedClay Pipe LinesC896 Terminology Relating to Clay Products3.Terminology3.1 Terminology C896 can be used for clarifications ofterminology in this test method.4.Summary of Test Method4.1 This test method shall be performed on lines afterconnection laterals,if any,have been plugged and adequatelybraced to withstand the test pressure,and after the trencheshave been backfilled and compacted.5.Significance and Use5.1 The tests called for herein,for their results,indicate theacceptability of installed vitrified clay pipelines.6.Preparation of the Line6.1 To ensure the proper seating of the test plugs and theaccuracy of the test,the lines should be cleaned prior to testing.6.2 Examples of methods for cleaning the lines are thesewer cleaning ball and high pressure flushing equipment.7.Procedure7.1 The hydrostatic infiltration test procedure is applicablewhere the measured water table is 2 ft(610 mm)or greaterabove the pipe barrel at the lower manhole of the test section.Where the ground water elevation is indeterminate,less than 2ft(610 mm)above the top of the pipe barrel,or the line ispartially below the water table,use a combination of both theair test and infiltration procedure.NOTE1The most practical method for testing is Test Method C828,and is recommended.However,where ground water is present and meetsthe criteria established in,the infiltration test procedure outlined in thispractice is recommended.7.2 Determine the allowable infiltration rate for the testsection using Table 1.NOTE2What can be called false infiltration represents condensate onthe pipe walls.7.3 The test rate table is based on the standard of 50 gal/in.diametermileday(4.6 L/mm diameterkilometreday).7.4 Table 1 shows the allowable infiltration rate ingallons 100 ft of pipe hour(litres per 30.5 metres hour)foreach nominal pipe size.7.5 If the test section includes more than one pipe size,calculate the allowable test rate for each size and add to arriveat the total allowable test rate for the test section.7.6 Discontinue all pumping of ground water for a period of24 h prior to testing.1This test method is under the jurisdiction ofASTM Committee C04 on VitrifiedClay Pipe and is the direct responsibility of Subcommittee C04.20 on Methods ofTest and Specifications.Current edition approved Dec.1,2013.Published December 2013.Originallypublished in 1988.Last previous edition approved in 2008 as C1091 03a(2008).DOI:10.1520/C1091-03AR13.2For 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,West Conshohocken,PA 19428-2959.United States1 7.7 Plug the inlet to the section to be tested.If there isinfiltration in the section upstream from the test section,theupstream section shall be plugged off or dewatered to preventthe manhole from filling with water.7.8 Begin collection and measurement after constant flow isgenerated at the test section outlet.Collect the infiltration in acalibrated container or use a calibrated weir.7.9 Terminate the infiltration test when sufficient water iscollected or measured,or both,to establish the test rate.7.10 If the infiltration rate(Table 1)is within the establishedlimit,the line is presumed to have pa