Google has failed me on this one so hopefully someone here can provide some wise words.

Our engineers' vans carry a nitrogen cylinder - cylinders owned by BOC and swapped out as and when empty. The nitrogen is used to adjust pre-charge pressure in various expansion vessels in the heating and air-conditioning systems of buildings.

The question has been asked about whether any kind of regular maintenance/inspection programme needs to be in place to ensure the safe function of the regulating valves - owned by us - that we use with these nitrogen bottles.

I have some experience of the Pressure System Safety Regs (as they pertain particularly to fixed installations) so am aware that with fixed systems a Written Scheme of Examination would likely be the 'bible' that sets out an inspection regime. I am not clear what the situation is for portable systems..........

Anyone help?

:-)

Not Nitrogen, but the following for oxy /fuel may be of interst:-

British Compressed Gases Association Code of Practice CP7

They may have a version specifically for Nitrogen

Chris

Thanks both........food for thought.