yr right is on the money. 50 psi and above for most bottles is a refill. Below 50psi requires a process known as scrubbing and/or a corrosion check.
All bottles have a manufacturers overhaul life which includes a regulator service or overhaul and a full purge and internal corrosion check.This obviously covers refilling the cylinder with fresh oxygen.The overhaul period is normally 5 years but it is spelled out by the manufacturer of the bottle
If anyone doubts the need for these procedures which could if ignored result in an exploding bottle, look up the Qantas incident near Manilla. Bottles only explode for ,corrosion, fire, cracking or fatigue.
Now that oxygen is B1 license, rather than a B2, it will be interesting to see if there are any changes to the oxygen accident rate.
Wunwing
Last edited by Wunwing; 25th May 2014 at 04:20.