Frist off I know nothing about making a steam boiler so if my question sounds dump please bare with me. But I was wondering if their is a type of boiler that heats the tubes on the inside and small amounts of water sprayed on the tubes to instantly turn it to steam and what type of tubing would be the best that would heat to red and not burn out or brake from having water sprayed on it. If anyone knows about this type of boiler or where I mite find info on these or if I am way off base. trying to build a boiler as small as possible and most efficiently. thanks ahead just incase I'm thinking out in never never land. I have never been one to play in the box when outside the box is so much fun just can be frustrating sometime.:fan: