You can't confuse acetylene or nitrogen, old or new style; acetylene uses maroon for the whole bottle, nitrogen uses black for the shoulder only. Also the cylin

You can't confuse acetylene or nitrogen, old or new style; acetylene uses maroon for the whole bottle, nitrogen uses black for the shoulder only. Also the cylinders are quite different shapes. Also the colours are for "the room is on fire, quick what's in that gas bottle over there?" situations. Are you allowed to be a safety responder if you're colour blind? For everyone else the rule is pretty simple; GTFO, and if acetylene is involved, GTFO out of the postcode.