Alan, I gave this response to Simon the other day:

A burst disc is a pressure relief device and as long as it is certified to rupture at 1000 psi then it would be acceptable from a safety perspective. I would not recommend it for the 1000psi limit as this pressure can be and has been achieved in outdoor summer events due to ambient temperature and direct sunlight. Once the disc ruptures, thats it, it does not re-seal afterwards.

Hope that helps

Paul
FRA Technical Team