1、Designation: C1719 11Standard Test Method forInstalled Precast Concrete Tanks and Accessories by theNegative Air Pressure (Vacuum) Test Prior to Backfill1This standard is issued under the fixed designation C1719; the number immediately following the designation indicates the year oforiginal adoption
2、 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 covers procedures for testing precastconcrete tanks (and in
3、stalled accessories) used for on-sitewastewater treatment, grease interception, grit/oil separation,water storage, or other applications requiring watertight con-struction and installation. This test method uses partial vacuumto demonstrate the integrity of the installed materials and theconstructio
4、n processes.1.2 This test method is intended to be used to demonstratethe condition of the installed system (precast concrete tank andaccessories) prior to backfill.1.3 Testing of the system before backfill is necessary so asto preclude inadvertent structural overloading of the systemcomponents duri
5、ng the test.NOTE 1Vacuum test criteria presented in this test method are similarto those in general use. The test and criteria have been widely andsuccessfully used in testing manholes as specified in Test Method C1244.1.4 The values stated in inch-pound units are to be regardedas standard. The valu
6、es 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 concerns, if any, associated with its use. It is theresponsibility of the user of this standard to esta
7、blish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C822 Terminology Relating to Concrete Pipe and RelatedProductsC1227 Specification for Precast Concrete Septic TanksC1244 Test Method for C
8、oncrete Sewer Manholes by theNegative Air Pressure (Vacuum) Test Prior to Backfill3. Terminology3.1 For definitions of terms relating to tanks, see Terminol-ogy C822.4. Summary of Test Method4.1 The tank shall be set in its installed position. Requiredaccessories and pipes shall be installed. All op
9、enings and pipesentering the tank shall be plugged. A vacuum shall be drawnand vacuum retention over a specified time period is used todetermine the acceptability of the tank and installed accesso-ries.5. Significance and Use5.1 This is not a routine test. The values recorded areapplicable only to t
10、he tank being tested and at the time oftesting. This test is intended only to demonstrate the sealingeffectiveness of the installed system. Structural design of thetank is defined or demonstrated within the scope of otherapplicable specifications and test methods, including Specifi-cation C1227.6. E
11、quipment Required6.1 A vacuum device is required and shall be capable ofreliably drawing the required vacuum. Suitable vacuum de-vices include vane- and venturi-type pumps, vehicle vacuumsystems, and high-performance shop-style vacuum cleaners.6.2 A vacuum measuring device is required and shall be a
12、vacuum gauge, mercury manometer, or water manometeraccurate to 0.1 in. (2.5 mm) Hg 1.4 in. (35 mm) H2O. If agauge is used, it shall be in current calibration to standardstraceable to NIST and shall have a range of no more than 10 in.(254 mm) Hg.6.3 Suitable pipes (or pipe stubs), pipe plugs, and pro
13、perblocking for same shall be used. If temporary stubs are used,they shall be of the same size and type of pipe as that to be usedin the final installation of the system, and shall be placed in thesame orientation as required by the final installation of thesystem.1This test method is under the juri
14、sdiction of ASTM Committee C27 on PrecastConcrete Products and is the direct responsibility of Subcommittee C27.30 on Waterand Wastewater Containers.Current edition approved Aug. 1, 2011. Published September 2011. DOI:10.1520/C171911.2For referenced ASTM standards, visit the ASTM website, www.astm.o
15、rg, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6.4 Suitable
16、 hose/tubing, valves, and related vacuumplumbing shall be used to allow the test to be conducted asrequired below.7. Preparation of the System7.1 The tank shall be placed into its final installed position.All section joints of the tank shall be sealed as required by themanufacturer.7.2 All pipes and
17、 conduits entering the tank shall beinstalled and temporarily plugged, taking care to securely bracethe pipes and plugs to prevent them from being drawn into thetank.7.3 Risers and their lids shall be installed to finished leveland sealed as required by the manufacturer.8. Procedure8.1 The test vacu
18、um shall be introduced either through oneof the risers or through an entry pipe, as long as either is sealedagainst loss of vacuum in accordance with the manufacturersrecommendations.8.2 A vacuum of 4 in. (102 mm) Hg 54 in. (1385 mm)H2O shall be drawn on the system, the valve on the vacuumline of th
19、e test head closed, and the vacuum pump shut off.8.3 The system shall pass if the vacuum is maintained for 5min. Should the negative pressure fall below 4 in. (102 mm)Hg during the test, the pressure shall be returned to 4 in. (102mm) Hg and the test time restarted. This shall not be prohibitedand t
20、he system shall be deemed acceptable if it passes therequirements on subsequent testing.8.4 If the installed system fails the test, the system shall notbe prohibited from being repaired and retested. Repairs shall bemade by the manufacturers recommended method.9. Report9.1 At the conclusion of the t
21、est, a report shall be recordedand shall include at a minimum: Date, time, and location of thetest; staff performing test and anyone else present; test equip-ment used and verification of calibration (as required); testset-up; test results and comments; and a positive statement asto the conformance
22、of the system with this test method.9.2 The test report shall be presented to the system owner ortheir representative, and a copy shall be retained by theindividual performing the test.10. Precision and Bias10.1 No justifiable statement can be made either on theprecision or bias of this procedure, s
23、ince the test result merelystates whether there is conformance to the criteria of the testspecified.11. Keywords11.1 acceptance criteria; concrete; on-site; tank; testmethod; vacuum testASTM International takes no position respecting the validity of any patent rights asserted in connection with any
24、item mentionedin this standard. 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 c
25、ommittee and must be reviewed 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
26、a meeting of theresponsible 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 Dr
27、ive, PO Box C700, West 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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).FIG. 1 Preparation of Tank for Vacuum Testing (Schematic Representation)C1719 112
