On Jul 15, 11:21 pm, TBirdFrank
wrote:
Welding - cast iron - boiler explosions???

shurely shome mistake

Boilers are not cast iron just for starters

Superheater pipes in the smokebox may be cast iron. And some foolish
people might be tempted to weld those pipes.
If a pipe leaks, the chimney is right above so the steam can go up
there. And it can go back through the boiler pipes to the firebox,
where hopefully the external door will be shut.
Unless someone is cooking a sausage at the time.