I'm working on a project in which I'll be dealing with pressure vessels. As of now I've drawn/conceptualized everything on theory basis. The diagrams are made on the basis of theory, but then I came through a situation where I'll require to heat water under high pressure at around 300-350 Celsius. So then I decided to use pressure vessels and to use LPG gas for heating it (LPG has flame temperature of around 1100 Celsius, but please note that I want to heat the water kept in vessel at just 300-350 Celsius)
Now, I'm stuck in thinking that how do you heat pressure vessels? Are there any special port/connections provided to heat them/the content inside them? Or are any special type of heaters used to heat them? Would be great if you can tell everything you know about heating it
Optional to read(this could be wrong): Are we supposed to directly heat them on flame? Just like cooking your food on the gas-stove running using LPG? If this is so, then won't it take too much time because the walls of vessels would be very thick?