Amico Automatic Cryogenic Liquid Solenoid Manifold - Manual (Page 18)

18 Amico Pipeline
The following instructions apply for performing a leak test on the joints made during assembly and connection of
the Amico manifold.
The connections inside the Amico control cabinet have been inspected at the manufacturing plant and DO NOT
require leak testing. In order to determine whether any leaks exist between the tank and header bar sections or at
the pipeline connections, the systems must be pressurized using either oil-free dry air or oil-free dry nitrogen.
In the case of medical Oxygen, Nitrous Oxide, or Carbon Dioxide Amico manifolds, the actual service gases
ARE NOT suitable for leak testing due to their inherent dangerous properties. Leak testing must be performed
using either oil-free dry air or oil-free dry nitrogen.
• Connect a Liquid tank of the manifold service gas to the header bars on each side of the manifold using the
proper tank connection hose assemblies (pigtails) supplied
• Make sure all other outlets are capped with the plug and chain assemblies supplied
• Make sure that the pressure inlet valves of each bank are fully OPEN
• “S-L-O-W-L-Y” open the tank valves on each side of the cabinet, one side at a time, to pressurize the header
bar and pipeline
• All outlets from the pipeline, downstream of the manifold, should be closed and thus there should be no
flow from the manifold
• Check for leaks at all tank extension joints and at the joints where the pipes are connected to the pipeline,
using a commercial leak detector which is compatible with oxygen
• If any leaks are found the system must be depressurized by bleeding through a convenient pipeline outlet
and the faulty connections must be repaired
• The Header bar connections may be tightened one more turn maintaining the horizontal location of the
tank adapters, or a further application of an oxygen service threaded sealant may be required
• If the brazed pipeline connections leak they must be removed, cleaned and then re-brazed following the
proper technique. All repaired joints must be pressure tested as mentioned previously
Testing for Leaks