View Single Post
Old 2019-06-17, 11:24am
Robin Passovoy Robin Passovoy is offline
Senior Member
Join Date: Dec 31, 2009
Posts: 475

Gas under pressure liquefies, which is what is actually in those canisters and tanks. As you work on the torch, you're taking some of that pressure off, which chills down the liquefied gas and slows the flow. Couldn't tell you the physics behind it, but I've had frost forming on those little compressed-air spray cans that are used to clean out keyboards, and I once saw a propane tank that had been used in an outdoor ironworking demo during a rainstorm. That thing had sealed itself to the pavement in an inch-thick shell of ice!
Reply With Quote