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Leakage Test

This document outlines the procedures for conducting a low pressure water test to check for leaks in sewer pipes. Key steps include sealing the pipe ends with plugs, filling the pipe slowly with water to a height between 2-7 meters, maintaining the water level for 2 hours and adding water every 5 minutes over a 30 minute period to determine the total leakage. Safety precautions like using proper PPE and checking equipment must also be followed. The low pressure water test can more clearly identify leak locations compared to an air test.

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889 views3 pages

Leakage Test

This document outlines the procedures for conducting a low pressure water test to check for leaks in sewer pipes. Key steps include sealing the pipe ends with plugs, filling the pipe slowly with water to a height between 2-7 meters, maintaining the water level for 2 hours and adding water every 5 minutes over a 30 minute period to determine the total leakage. Safety precautions like using proper PPE and checking equipment must also be followed. The low pressure water test can more clearly identify leak locations compared to an air test.

Uploaded by

asr.engineering2023
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Low Pressure Water Test (Leakage Test )

1.0 General
The low pressure water test is to be used for checking the water tightness of the joints and the
integrity of the sewer pipes. This test will show the location of the leaks more clearly than the
low pressure air test.

2.0 Equipment & Material


 Test Plug (2 nos)
 Clear Hose Pipe (with ruler indicator in liter at downstream end)
 Timer bracing to support hose pipe
 High Pressure Water Pump

3.0 Procedule

a) Seal the open ends, including sideline ends, using approved plugs. Strut the plugs
to prevent movement. Provide temporary bracing where necessary to prevent sewer movement
during testing.
b) Establish appropriate arrangements involving a standpipe to apply the water head
upstream end as shown in Figure 1.
c) Sealing the upstream end with a plug which has a connection point for a hose,
which can be connected to a tube acting as a standpipe.
d) Fill in water from the upstream end. Ensure water head is not less than 2 m above pipe crown
at the upstream end and not greater than 7 m above pipe crown at the downstream end.
Shorten the test length if the sewer gradient is so steep as to cause these water head
requirements not to be met.
e) Fill the sewer slowly to the required head and bleed air from behind the upstream plugs.
(Air may be released by slightly loosening the plug and pushing in a piece of wire between
the seal and the pipe.)
f) Maintain the water head for two (2) hours. Top up the water as required.

g) Check for leakage at the plugs and the test apparatus during the pressurising period and the
constant pressure holding period. Release the water pressure if leakage occurs. Make the
necessary repairs and adjustments before repressurising again.
h) Commence the test immediately after the last adjustment of water head in the preceding two
hours period.
i) Add water to maintain the starting water head every 5 minutes during the test period of 30
minutes. Record the total amount of water required for readjustment.
(Refer attachment 1)

4.0 HSE Requirement


a) All Personnel must be registered with security department and must possess valid
CIDB green card.
b) PPE must be complied at all times during installation works and testing.

c) All pipes, connection and pipes used must be checked by supervisor prior to testing.

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