pressure testing hoses

Pressure Testing

Global Onsite pressure tests every hose assembly to 1.5 x WP that is manufactured in our workshop and Onsite containers. In addition to that, we also carry out regular burst testing samples to ensure that our customers are getting the very best quality.

Is pressure testing a safety requirement for everybody?

In order to have type approval from DNVGL and ABS a valid pressure test for all hose assemblies is required.

What risks are involved if you do not pressure test hoses?

The hoses will not be approved by either DNVGL or ABS. We are also able to identify any unusual behaviour from the hose before it is sent to the customer for installation.

What happens if a hose fails a pressure test?

If a hose fails a pressure test we will log it and will run a root cause analysis to understand why the hose failed. We will never try to repair or fix a hose that fails in a pressure test. The hose is scrap and a new hose will have to be manufactured.

How is the hose pressure test carried out?

All hose assemblies made by Global Onsite are pressure tested with water 1.5 times the normal working pressure of the hose for 5 minutes. Example if the hose has a working pressure of 350 bar we will pressure test it to 525 bar for 5 minutes.

What are you looking for when the test is carried out?

When performing a pressure test we are looking for any leaks from the hose. There are no tolerances for any leaks. If a hose is leaking it will automatically fail the pressure test.

What role do supervisors and managers play when pressure testing?

All personnel that are doing pressure tests and hose assemblies need to have a valid certificate and training. It is our supervisors/managers responsibility to ensure that all our employees have the correct training and certificates to perform the task they are instructed to do.

What safety measures need to be taken when pressure testing?

When doing pressure tests it is important to follow our procedures and risk assessments to be able to perform a safe pressure test.

What could cause hose degradation?

The hose is mainly built out of rubber. Rubber deteriorates quickly and must, therefore, be treated and stored correctly. Global Onsite has a policy that we will never sell a customer a hose that is older than 2 years. If a hose has any scratches in the outer cover it will also be scrapped. If a hose is stored in UV light or exposed to daylight the rubber will age even faster. All our hoses are stored in closed boxes to avoid any UV light exposure.

What reassurance does the final certificate provide once testing has been completed?

With a pressure test certificate issued from Global Onsite, our customers can be assured that they have received a product that meets the quality the hose was designed for.

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