Installation
06-237619-001 4-31 April 2020
4-11 PRESSURE TESTING OF PIPEWORK
It is recommended that the pressure testing is performed prior to the cylinder bank assembly.
Once installation of the open ended pipe work is complete, all nozzle connections shall be
plugged. and the pipe shall be pressure tested in accordance with national standards.
Manifolds and other closed section pipe work, such as selector valves, are pressure tested by
Kidde Fire Systems.
4-11.1 Precautions
Pneumatic testing involves the hazard of energy stored in compressed gas. Particular care
must therefore be taken to minimize the chance of failure of brittle components during a
pneumatic test.
Use compressed air or the Agent for pressure testing. All due precautions shall be taken to
prevent injury to personnel while the pipes are under pressure. Always maintaining a safe
distance from the pipe work. Evacuation of all areas affected both prior to and during the
pressure test. Conduct the pressure test from outside the room containing the pipe work.
The Compressed air or Agent pressure must be applied slowly through a pressure regulator.
When a pressure of approximately 3 bar is attained, a preliminary check shall be made,
including examination of joints and fittings.
4-11.2 Pressure Testing Using Gas
Follow this procedure to pressure test the pipework:
1. Disconnect the pipe downstream of the manifold and fit the distribution pipe inlet with a
test valve which incorporates a hose connection to the pressure testing equipment
(union/flanged connection to be supplied locally).
If no union/flanged connection has been installed one of the manifold check valve connec-
tions may be used or connect compressor with longer hose to one of the nozzle locations
(with nozzle removed) and remaining nozzle locations blanked off, before pressurizing to 3
bar ensure discharge hoses are disconnected from cylinder valves.
2. Disconnect all discharge hoses from the manifold.
3. Connect the pressure testing equipment to the test valve or manifold check valve (3/4”
BSP).
4. Slowly apply compressed air or Nitrogen through a pressure regulator. When a pressure of
3 bar is attained, make a preliminary check, including examination of joints and fittings.
After the inspection, check for pressure loss of no more than 20% (0.6 bar) in 10 minutes.
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