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Hi all, Firstly the tube weep when cold or hot. I was told that it was the correct expander for the size tube/wall thickness and size of holes in the plate on the smoke box end. out here in Darkest Africa one doesn't always get the correct tooling. J, thank you for the information on the...

Greetings J, I'm using 19mm dia.copper tubes in to 12mm plates. The expander I'm using is for 19mm dia.tubes. I don't know if I have left too much tube protruding, I have left 4mm. Regards, K

Greetings , the copper tubes in the steel boiler I have built show some weeping.The tubes have been expanded ,but I still cannot get a perfect seal.Anyone with some advise would be appreciated. Regards, Warthog

Hi, Thank you for accepting my application to join this site. I'm at present building a South African Railways 15f in 5inch gauge. It has a steel boiler with copper tubes. The barrel is a schedule 40 steel tube 8' dia. with the rest of the construction from 10mm boiler plate. as soon as I can...