ASTM C1214M-2002(2009) Standard Test Method for Concrete Pipe Sewerlines by Negative Air Pressure (Vacuum) Test Method (Metric)《负压(真空)试验法测定混凝土管下水道的标准试验方法(米制)》.pdf
《ASTM C1214M-2002(2009) Standard Test Method for Concrete Pipe Sewerlines by Negative Air Pressure (Vacuum) Test Method (Metric)《负压(真空)试验法测定混凝土管下水道的标准试验方法(米制)》.pdf》由会员分享,可在线阅读,更多相关《ASTM C1214M-2002(2009) Standard Test Method for Concrete Pipe Sewerlines by Negative Air Pressure (Vacuum) Test Method (Metric)《负压(真空)试验法测定混凝土管下水道的标准试验方法(米制)》.pdf(3页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: C 1214M 02 (Reapproved 2009)Standard Test Method forConcrete Pipe Sewerlines by Negative Air Pressure(Vacuum) Test Method (Metric)1This standard is issued under the fixed designation C 1214M; the number immediately following the designation indicates the year oforiginal adoption or, in
2、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 concretepipe sewerlines, when using t
3、he negative air pressure (vacuum)test method to demonstrate the integrity of the installedmaterial and the construction procedures. This test methodcovers testing of 100 to 900-mm diameter circular concretepipe sewerlines utilizing gasketed joints.NOTE 1The user of this specification is advised that
4、 methods de-scribed in this test method may also be used as a preliminary test to enablethe manufacturer or installer to demonstrate the condition of sewer pipeprior to delivery or backfill. Minimum test times presented in Table 1 arefor pipelines. Holding times for testing an individual pipe may ha
5、ve to beincreased to allow for the accumulation of leakage when the tested pipeare incorporated into a continuous pipeline.NOTE 2The user of this test method is advised that the negative airpressure (vacuum) test criteria presented in this test method are similar tothose in general use. The test and
6、 criteria have been used widely andsuccessfully in testing smaller diameter pipe. Larger pipe will be acceptedmore conveniently by visual inspection and individual joint testing.NOTE 3The user of this test method is advised that no correlation hasbeen found between loss of vacuum and water leakage.1
7、.2 This test method is the SI companion to Test MethodC 1214.1.3 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 establish appro-priate safety and health practices and determine the applica-
8、bility of regulatory limitations prior to use. See Section 6 forspecific safety precautions.2. Referenced Documents2.1 ASTM Standards:2C 822 Terminology Relating to Concrete Pipe and RelatedProductsC 924 Practice for Testing Concrete Pipe Sewer Lines byLow-Pressure Air Test MethodC 969 Practice for
9、Infiltration and Exfiltration AcceptanceTesting of Installed Precast Concrete Pipe Sewer Lines3. Terminology3.1 DefinitionsFor definitions of terms relating to con-crete pipe, see Terminology C 822.4. Summary of Test Method4.1 The sewerline to be tested is plugged. Air is removedfrom the plugged lin
10、e by a vacuum pump or vacuum reservoir.The amount of vacuum loss is used to determine the accept-ability of the sewerline.5. Significance and Use5.1 This is not a routine test. The values recorded areapplicable only to the sewer being tested and at the time oftesting.6. Safety Precautions6.1 Warning
11、The user of this test method is advised thatthis test will be dangerous if a line is not prepared properly andproper procedures are not followed.6.2 Access manholes or structures must be ventilated and airquality continuously monitored.6.3 No one shall be allowed in or near the manholes duringtestin
12、g.7. Preparation of the Sewerline7.1 Where practical, clean the line prior to testing, wet thepipe surface, and eliminate debris.NOTE 4The user of this test method is advised that a wetted exterior1This test method is under the jurisdiction of ASTM Committee C13 onConcrete Pipe and is the direct res
13、ponsibility of Subcommittee C13.09 on Methodsof Test.Current edition approved June 1, 2009. Published July 2009. Originally approvedin 1992. Last previous edition approved in 2002 as C 1214M 02.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at s
14、erviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.TABLE 1 Minimum Test TimeNominalPipeSize, mmT (Time),min/100 mNominalPipeSize, mmT (Time),min/100 m100 0.9 525 9.7150 2.0 600 11.0200 3.5 675 13.0250 4.7 750 15.0300 6
15、.0 825 17.0375 6.8 900 19.0450 7.71Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.pipe surface is desirable and will produce more consistent test results. Airmay pass through the walls of dry pipe. This can be overcome by wettingthe
16、pipe. Usually, moisture absorbed from the backfill is sufficient to copewith this situation. If the problem persists, segmental testing of the linewill establish if there is a significant leak.7.2 Plug all pipe outlets including laterals. Review safetyprecautions in Section 6.8. Procedure8.1 Determi
17、ne the test time for the sewerline to be tested byusing Table 1. Table 1 has been established using the criteriaspecified in Table 2 and the formulas contained in the Appen-dixes. The test time is the time required for the vacuum to dropfrom 23.6 to 16.9 kPa.NOTE 5To provide satisfactory test result
18、s, the vacuum pump shall becapable of evacuating the sewer test section in the required test time, orless, as determined by 8.1. The pump capacity required to accomplish theevacuation of the line is equal to the rate necessary to reduce the sewer tothe desired pressure plus the allowable vacuum loss
19、 rate:C 5 0.17D2L/T 1 Qwhere:C = vacuum pump capacity, m3/s,T = required test time, or less,D = pipe internal diameter, m,L = length of test section, m, andQ = allowable vacuum loss rate, m3/s.8.2 Evacuate air until the internal air pressure of thesewerline is lowered by approximately 27.0 kPa of me
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