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What is a Hydrostatic Test?

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The hydrostatic test consists of filling a piece of equipment with a fluid at test pressure, for a given period of time, to check the existence of leakages. The test is passed if the equipment bears the test pressure without any leakage. 

HYDROSTATIC TEST

The hydrostatic test is a common procedure to test piping equipment, like pipes, valves, and fittings (i.e. all products that shall withstand pressure when in operation.

When this type of test is not possible or recommended, the pneumatic test is a suitable alternative.

The hydro test is executed by skilled personnel by using chlorinated water (or other colored fluids) to check the existence of leakages in pressure-containing equipment. Before starting a hydrostatic test, the staff should pay attention to the testing fluid chemistry and how it may impact the equipment.

PNEUMATIC TEST

A pneumatic test uses compressed air or inert gases to test a piece of equipment. Pneumatic tests are generally executed on low-pressure equipment or small parts or when a hydro test cannot be executed for whatever reason.

A FAILED TEST (VIDEO)

The video shows how the test is executed and a failure example

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