psycix wrote:I do not expect a fridge to have a pop-off: it would be releasing the gas and the fridge would need a freon-refill.
Which generally would be greatly preffered to an explosion. I'm talking about a safety pop-off. CO2 tanks have'm. Bernzomatic propane cylinders have'm. Water heaters have'm. Compressor resevoirs have'm.
I suppose that if the max pressure of the frig compressor is low enough then a safety wouldn't be needed, but a normal reffer system is all metal, no rubber hoses to pop as a safety. Perhaps the crimped fill pipe is used as the safety?