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

I notice a lot of people rework and restore old Jensen and Wilesco boilers, so I assume that at least some of them test the things for safety purposes. I know that boilers are normally tested to twice their operating pressure , and I, myself have done so with a P M Research #1 boiler I built. I guess testing to twice operating pressure is the way to go. That being said, what is the max operating pressure for a Jensen 75 boiler?

Donald E. Jones