OGLTS has our own in-house testing bay to ensure all pressure testing operations are carried out in a safe and efficient manner.

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Hydrostatic Testing

Hydrostatic or Hydro Testing is a process that uses liquid to pressurize an item for strength and leaks. After shutdown and repairs, a Hydrostatic test is often required to validate that the equipment is prepared to operate under desired conditions once it is returned to service.

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Test Process

A hydrostatic test involves filling an item (component, piping or tanks) with a liquid removing the air contained within it, and then pressurizing the system up to 1.5 times the design pressure limit of the unit. The pressure is held for a particular duration, and then the next step is visual observation. A drop in pressure indicates that there is a leak.

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Also, the visual inspection is often enhanced by applying a tracer or fluorescent dye to the liquid to identify cracks and leaks effectively.

A hydrostatic test will expose leak points and notifies about internal or external structural problems with the tank (such as cracks) that might lead to leaks later on.

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Pneumatic Testing

A pneumatic test uses air, or an inert gas such as nitrogen, to pressurize the system to specified percentage of its original pressure limit (e.g. 110%). Then, a holding period is applied for a fixed duration, and the results are monitored to determine the safety and integrity of the system.

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A pneumatic test determines the safety capabilities of a pressured system by detecting leaks, understanding maximum capacity, and testing Joint fittings.

 

Why is a Pneumatic Test required?

Pneumatic tests are necessary to ensure your pressure system's safety, reliability, and leak tightness. So, when a newly installed or repaired pressure system is about to be operational again, a pneumatic test is performed to validate the systems' safety and reliability.

The test also helps understand the limits and capabilities of a pressured system, which are crucial to know before putting any piping into service.

And quite understandably, the test also helps to know that your equipment meets industry qualifications or not.