ASTM C828-03
(Test Method)Standard Test Method for Low-Pressure Air Test of Vitrified Clay Pipe Lines
Standard Test Method for Low-Pressure Air Test of Vitrified Clay Pipe Lines
SCOPE
1.1 This test method defines procedures for testing vitrified clay pipe lines, using low-pressure air, to demonstrate the integrity of the installed line. Refer to Practice C 12.
1.2 This test method shall be performed on lines after connection laterals, if any, have been plugged and braced adequately to withstand the test pressure, and after the trenches have been backfilled for a sufficient time to generate a significant portion of the ultimate trench load on the pipe line. The time between completion of the backfill operation and low-pressure air testing shall be determined by the approving authority.
1.3 This test method may also be used as a preliminary test, which enables the installer to demonstrate the condition of the line prior to backfill and further construction activities.
1.4 This test method is suitable for testing gravity-flow sewer pipe constructed of vitrified clay or combinations of clay and other pipe materials.
1.5 Terminology C 896 is to be used for clarification of terminology in this test method.
1.6 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
1.7 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: C 828 – 03
Standard Test Method for
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Low-Pressure Air Test of Vitrified Clay Pipe Lines
This standard is issued under the fixed designation C828; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Summary of Test Method
1.1 This test method defines procedures for testing vitrified 3.1 Thesectionofthelinetobetestedisplugged.Air,atlow
clay pipe lines, using low-pressure air, to demonstrate the pressure, is introduced into the plugged line. The line passes
integrity of the installed line. Refer to Practice C12. the test if the rate of air loss, as measured by pressure drop,
1.2 This test method shall be performed on lines after does not exceed a specified amount in a specified time. This
connection laterals, if any, have been plugged and braced may be determined by the use of Table 1, or calculated by use
adequatelytowithstandthetestpressure,andafterthetrenches of the formulas in Appendix X1.
have been backfilled for a sufficient time to generate a
4. Hazards
significant portion of the ultimate trench load on the pipe line.
The time between completion of the backfill operation and 4.1 Thelow-pressureairtestmaybedangeroustopersonnel
if, through lack of understanding or carelessness, a line is
low-pressure air testing shall be determined by the approving
authority. overpressurized or plugs are installed improperly. It is ex-
tremely important that the various plugs be installed so as to
1.3 This test method may also be used as a preliminary test,
which enables the installer to demonstrate the condition of the prevent the sudden expulsion of a poorly installed or partially
inflated plug. As an example of the hazard, a force of 250 lbf
line prior to backfill and further construction activities.
1.4 This test method is suitable for testing gravity-flow (1112 N) is exerted on an 8-in. (205-mm) plug by an internal
pressure of 5 psi (34 kPa). Observe the following safety
sewerpipeconstructedofvitrifiedclayorcombinationsofclay
and other pipe materials. precautions:
4.1.1 Nooneshallbeallowedinthemanholesduringtesting
1.5 Terminology C896 is to be used for clarification of
terminology in this test method. because of the hazards.
4.1.2 Install all plugs securely.
1.6 The values stated in inch-pound units are to be regarded
4.1.3 When lines are to be tested, it may be necessary that
as the standard. The values given in parentheses are for
information only. the plugs be braced as an added safety factor.
4.1.4 Do not overpressurize the lines.
1.7 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
5. Preparation of the Line
responsibility of the user of this standard to establish appro-
5.1 Air may pass through the walls of dry pipe. A wetted
priate safety and health practices and determine the applica-
interior pipe surface is desirable and will produce more
bility of regulatory limitations prior to use.
consistent test results. Usually moisture absorbed from the
2. Referenced Documents
backfill is sufficient to cope with this situation. Where practi-
cal, clean the line prior to testing to wet the pipe surface and
2.1 ASTM Standards:
2
C12 Practice for Installing Vitrified Clay Pipe Lines eliminate debris.
C1091 Test Method for Hydrostatic Infiltration and Exfil-
2 6. Procedure
tration Testing of Vitrified Clay Pipe Lines
2
6.1 Determine the test time for the section of line to be
C896 Terminology Relating to Clay Products
testedusingTable1orTableX1.1ortheformulasinAppendix
X1.
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6.2 Plug all openings in the test section.
ThistestmethodisunderthejurisdictionofASTMCommitteeC04onVitrified
Clay Pipe and is the direct responsibility of Subcommittee C04.20 on Methods of
6.3 Add air until the internal pressure of the line is raised to
Test and Specifications.
approximately 4.0 psi (28 kPa).After this pressure is reached,
Current edition approved February 10, 2003. Published June 2003. Originally
allowthepressuretostabilize.Thepressurewillnormallydrop
published in 1975. Last previous edition approved in 1998 as C828–98.
2
Annual Book of ASTM Standards, Vol 04.05. as the air temperature stabilizes. This usually takes 2 to 5 min,
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C828–03
depending on the pipe size. The pressure should be reduced to 7. Test Time
3.5 psi (24 kPa) before starting the test.
7.1 Table 1 shows the required test time, T, in minutes/100
6.4 Start the test when the pressure is at 3.5 psi (24 kPa). If
ft of pipe for
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