Hydrostatic testing is the procedure that most newly manufactured hose, cylinders and tubes go through to qualify as safe and tested. Hydrostatic testing is also required periodically to re-qualify the pressure vessels for a continued service, so if a hose has been in use for a period of time, it may need testing to ensure it is safe to use in its application.

During a hydrostatic test, a pressure vessel is placed inside a closed system; usually a test jacket filled with water and a specified internal water pressure is applied to the container inside this closed system.

The vessel that is being tested should be located within a sealed vessel, which is filled with incompressible fluid – usually water or oil. The vessel is then subjected to a known internal pressure for a set duration, which is already in place, which them determines the total and permanent expansion that the test chamber undergoes. After a hydrostatic test has been completed, a physical and visual inspection will also take place, which helps to determine whether you the device has been damaged or distorted due to the pressure it has just been subject to.

The pressure is usually 150% of the vessels recommended operating level which allows a thorough test of the vessel to be taken out. During times, an application may require its vessels to operate with a higher pressure, leading to an increased strain on the hose. This ensures that a hose can deal with times like these, avoiding leaks, bursts and other damages, each of which could result in accidents and fatalities that can have dangerous consequences. It is always recommended that you should have your applications and vessels checked regularly to avoid issues such as these.

Buckley Industrial are a business that specializes in the manufacture, inspection and testing of flexible hose assemblies for the power generation, chemical, food processing, paper and petrochemical industries and can supply you with the services that you require.