Hi, Installing oxygen gas cylinder outside a building and piping gas to upstairs lab Gas to be feed at 30bar What safety precautions would I need to be aware of;(covering installation and maintenance of the gas supply The gas is for a new material analyser / tester for lab. Any advise would be great

How big is the cylinder? Most contain of order 11 cubic metres of gas. You need security - people should not be able to tamper with the cylinder (remember to acount for any possibility of trespassers, including children). The gas bottle (which I guess will be rented) should be securely tethered so that it cannot fall over. The pipework needs to be of sufficient integrity for the service conditions, and the joints need to be high integrity. Check that, if there were a leak, it cannot cause oxygen enrichment to any significant extent (will normally only apply if this bottle leaks into a small unventilated space). The pipework (but not the gas bottle, if it is rented) needs to go on the pressure system statutory inspections (written scheme of examination) . You need to consider what is at the user end. If there is any fuel gas, you should consider items such as flashback arrestors. The regulator will need replacement at intervals - look at the BCGA guidance for this. If you do need flashback arrestors, these will also need to be replaced at intervals. Do you need a pressure release valve? This will depend on the scope for generating an over-pressure and what will happen if there is. That should get you thinking. Not claimed to be exhaustive.

The O2 TPV + the pipework comprise a Pressure System and must comply with the Pressure Systems Safety Regs! Frank Hallett