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Proof Test Strategy
Partial Testing
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Partial testing refers to a test that is capable of revealing certain failure
modes.
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By carrying out a series of partial tests it may be possible to reveal all failure
modes.
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Partial tests can be carried out at different frequencies.
An example of partial testing would be the testing of an actuated valve.
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Partial test 1:
Witness valve transition from operation position to the safe state in a
smooth manner whilst the plant is shut down.
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Partial test 2:
Flow scan of the valve and compare performance results against results
taken when new.
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Partial test 3:
Leak test of valve, requires valve to be removed from service.