Aye Steve,
Working around steam engines has made me cautious about pressurised steam. Even the soldered cocoa tin with the small nail hole punched in the lid, then sealed with plasticine, being heated by a methylated spirit burner could built up a good head of pressure afore 'letting fly'!

Soldering, the lid on a tin, with a wee bit of water in it and then 'cooking' it, was very salutary, the soldering coming apart in spectacular fashion and the ringing in the ears for a wee while after. Far better than any "When iPad"!
Off for a stravaig and get blown into the North Sea.
Toodle pip, Bill