1、Designation: C 1091 03a (Reapproved 2008)Standard Test Method forHydrostatic Infiltration Testing of Vitrified Clay Pipe Lines1This standard is issued under the fixed designation C 1091; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revisi
2、on, 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 vitrif
3、ied 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 th
4、e 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 stand
5、ard.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. Referenc
6、ed Documents2.1 ASTM Standards:2C12 Practice for Installing Vitrified Clay Pipe LinesC 828 Test Method for Low-Pressure Air Test of VitrifiedClay Pipe LinesC 896 Terminology Relating to Clay Products3. Terminology3.1 Terminology C 896 can be used for clarifications ofterminology in this test method.
7、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 thei
8、r 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
9、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
10、 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.NOTE 1The most practical method for testing is Test Method C 828,and is recommended. However, where ground water is present and meetsthe criteria est
11、ablished in 7.1, the infiltration test procedure outlined in thispractice is recommended.7.2 Determine the allowable infiltration rate for the testsection using Table 1.NOTE 2What can be called false infiltration represents condensate onthe pipe walls.7.3 The test rate table is based on the standard
12、 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 si
13、ze 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.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
14、be plugged off or dewatered to preventthe manhole from filling with water.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 Nov. 1, 2008. Publish
15、ed November 2008. Originallypublished in 1988. Last previous edition approved in 2003 as C 1091 03a.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 Do
16、cument Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7.8 Begin collection and measurement after constant flow isgenerated at the test section outlet. Collect the infiltration in acalibrated container
17、 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 passed the test.7.11 If there is no flow in the test s
18、ection or the flow isminimal and cannot be measured, the line has passed the test.8. Precision and Bias8.1 No statement is made about either the precision or biasof this test method for measuring gallons (litres) and time,since the results merely state whether there is conformance tothe criteria for
19、 success specified in the procedure.9. Keywords9.1 air test; clay pipe; hydrostatic test; infiltration; pipe;pressure test; sewers; vitrified clay pipe; water testASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this s
20、tandard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be re
21、viewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of therespons
22、ible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West
23、Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).TABLE 1 Allowable
24、Infiltration Test Rate in Gallons/100 ft ofLine Hour (Litre/Metre Hour)nominal pipesize,in. (mm)gal/100 ft h(L/m h)nominal pipesizein. (mm)gal/100 ft h(L/m h)4 (100) 0.16 (0.020) 24 (610) 0.95 (0.12)6 (150) 0.24 (0.030) 27 (685) 1.1 (0.13)8 (200) 0.32 (0.039) 30 (760) 1.2 (0.15)10 (255) 0.39 (0.049) 33 (840) 1.3 (0.16)12 (305) 0.47 (0.059) 36 (915) 1.4 (0.18)15 (380) 0.59 (0.073) 39 (990) 1.5 (0.19)18 (455) 0.71 (0.088) 42 (1070) 1.7 (0.21)21 (535) 0.83 (0.10) 48 (1220) 1.9 (0.24)C 1091 03a (2008)2
