Sorry to hear you need supplemental O2. You will need to be extremely aware of any kind of ignition sources. You may want to plan your activity, turn off the O2, do what you need, and take a break to catch your breath, and repeat. You might be on an intensifier with a long hose which is another hazard to deal with. If anything is hot enough to glow it will combust, and possibly catch something that is close on fire. Once you have a routine I'm sure you will figure it out. I have seen someone with a goldfish right from the store use a cigarette to open the plastic bag full of oxygen. Instant flame, and a fish flopping on the floor. I have had several instances of people who smoke, and use O2 singe their face when the cigarette burst into flames. Sorry to be long winded, it really is/can be dangerous.