Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

I don't have the image nor the specs at my fingertips, but I have seen a Jensen boiler that was supposed to have been tested to failure. It looked about like a football in shape and the pressures reached were in the hundreds of pounds if I recall correctly.

But then again, Jensen's are about the most overbuilt boilers in the toy steam field, while there are many others with thin walls, soft solders and long seams in their boilers that may well only be good to about twice their safety valve release pressures.

All that said, toy steam boiler explosions are historically, very rare indeed!