Friday, 8 May 2015

Which Hose Testing Service Do You Need?

hydrostatic testing
The management of Flexible Hose Assemblies (FHAs) is often overlooked by many companies. However, in recent years the Health & Safety Executive and many more companies have grasped the importance of managing the integrity of FHAs.

Hose testing services such as hydrostatic testing, helium testing and nitrogen testing are carried out in order to test for leaking hose assemblies, which are a risk to personal health and safety. Additionally, there are many environmental issues associated with unwanted emissions. Depending on your company and specific requirements, there are numerous hose testing techniques that can be employed:

Hydrostatic Testing – This involves filling a hose assembly with water and taking it to a pre-specified test pressure, which is generally 1.5 times the maximum working pressure. This is then held at this pressure for a set period of time, to ensure it can hold this pressure without leaking.

Helium Testing – Helium is extremely rare in the atmosphere, therefore it makes it easier to find leaks and due to it being inert, it is safe to test with. It has become the method of choice over time, for the majority of high sensitivity leak testing applications. This is used to find small leaks or possibly larger leaks in bigger volumes.

Visual Inspection – The exterior of a hose can be damaged in many ways, which can make you question its integrity. Some of these defects could be obvious dents and kinks, but others can be a lot harder to find. Therefore the Visual Inspection involves examining the outside of a hose for defects, which are likely to cause leaks during service.

Nitrogen Testing – This involves preparing the hose assembly for testing, but making sure the assembly is completely sealed. This is connected to the test rig through a flexible hose one end and the other end of the hose will have a valve attached to release the nitrogen slowly and safely once the test is complete. The hose is pressurised whilst under water to ensure it can hold pressure without leaking.

Vacuum Testing – This testing service is employed to test hose assemblies used in suction applications, to ensure they will stay rigid during service.

Internal Inspection – A hose assembly can pass both a visual inspection and a hydrostatic test, but it can still have imperfections to its internal structure. The inspection involves examining the inside of a hose, looking for any defects which could cause it to fail during service. After this is complete, the hose assemblies are immediately sealed at both ends using custom made caps to prevent ingress of any foreign bodies.

Electrical Continuity Test – Certain applications require an electrical bond between the end fittings of a hose assembly, to avoid creating a static build up within the length of the hose. This is achieved by incorporating a conductive material within the hose bonded to the end fittings.

If you would like to find out more information of the hose testing services Buckley Industrial offer, contact them by calling 01244 544 080 or email their supportive sales team at: sales@buckley-industrial.co.uk


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