10
NOTE:
Both ends of the tape should be grounded during installation.
Ends of Tape Must be Grounded at Sumps
Earthing Rod
When using a detection tool, the near end of the detectable tape should be disconnected from the grounding
point to allow the red cable from the transmitter to be connected to the tape and the black cable from the
transmitter to be connected to the grounding point. The far end of the tape should remain grounded to give the
highest signal strength and the earth spike should be as far away from the trace path as possible at a 90 degree
angle.
Use the lowest frequency possible from the transmitter around 577 Hz or 8 kHz to eliminate coupling to other
grounded cables. Use the receiver to follow the path of the tape to locate the buried pipe. Follow direction
included with the receiver and transmitter for detecting buried pipe location.
PRESSURE TESTING
Following inspection, prior and subsequent to backfilling, a tightness test should be carried out by a competent
person on each pipe run, chamber and sump to verify the integrity of joints and seals. This testing should meet
the requirements of local officials and engineers and comply with local health and safety regulations. The
following testing procedure is suggested for guidance only and should in no way override oil companies or local
regulator’s requirements.
TESTING GUIDELINES
Equipment:
• Target test pressure should be 50% of scale on gauge, e.g. if the test pressure is 1 Bar
(14.5 psi), use a 2 bar (29 psi) gauge.
• Gauges should have serial numbers and be tested and certified every year.
• Pressure testing equipment should have fitted a relief valve set at around 0.5 bar (7.25 psi) above the test
pressure.
General Guidelines:
• When applying pressure from gas cylinders, use suitable valves to ensure test pressure is not exceeded.
• Apply pressure or vacuum slowly to minimise risks.
• When you test primary pipe for tightness, the secondary should be open to atmosphere.
• Secondary Gemini® fittings should not be welded prior to testing primary to allow inspection of joints.
• When you test secondary pipe for tightness, the primary should be open to atmosphere. (The exception is
when you test the secondary pipe at a pressure higher than the recommended value in Table 5. When this
is the case, pressurize the primary pipe to a pressure that is ≥ (Secondary Test Pressure - 1 bar).
• Wipe each joint with soapy water to check for leaking.
WARNING:
Follow all federal, state, and local laws governing the installation of this product and its associated
systems. When no other regulations apply, follow NFPA codes 30, 30A, and 70 from the National Fire Protection
Association. Failure to follow these codes could result in severe injury, death, serious property damage, and/or
environmental contamination.
WARNING:
To avoid explosion hazards, nitrogen or an inert gas from a pressure cylinder should be used in
place of compressed air for tightness testing if fuel has been used to ballast underground storage tanks or if
pipe-work has previously contained petroleum.
Summary of Contents for UPP PIPING
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