The cold, the torch, the oxycon or me.....?

[Scubeadoo]

When it's very cold you may need to keep your Propane cylinder slightly warm as well.
Propane is in a liquid form in the cylinder and needs to absorb a certain amount of heat from the environment to " gas off" . If you feel your cylinder it will often feel quite cool even on a warm day if you have ben working for a prolonged period as the liquid is absorbing heat from the steel cylinder. Propane gasses off at temperatures down to -6c ( possibly lower) but the rate at which it gasses off drops as the outside temperature falls particularly once the temperature where your cylinder is kept approches freezing.
What may be happening is that your propane pressure may be falling as you work as the "gassing off" process in the bottle is not quite keeping pace with the rate at which you are using gas.
Standing your Propane cylinder somewhere slightly warmer may help, even moving it into the sun on a very cold clear day can help ( Do Not do this in the summer).


Marion