Hi,

I've been reading through the rules and it mentions that a burst disc is required on cylinders above 50psi. How does this work for tiny bottles, the sort that are used in paintball handguns and bicycle tire inflators?

Example:
http://www.ebay.co.uk/itm/Bicycle-Cy...ViV0MTTlN7jRbw

Are these disallowed in the rules even if there is a pressure relief valve?

Dan