Kunifer boilers

[Ebenezer GoodParticipant @ebenezergood76202]

[Ebenezer GoodParticipant @ebenezergood76202]

Hi, I have just been given some 150mm Kunifer pipe 4mm wall, has anyone used this for building a boiler before? My Internet searching has drawn a blank.

[duncan webster 1Participant @duncanwebster1]

There is a lot of good information at **LINK**

There are 2 grades, I'm not sure it makes any difference. There is a UK supplier at **LINK**

if you give them a ring and ask to speak to techy people they might help. At the end of the day it's down to your boiler inspector

[nigel jones 5Participant @nigeljones5]

Im only guessing here(its been 30 years since I last sat in a metallurgy class) but nickel is added to the copper to make it more ductile, and a ductile boiler isn't something I want to be near. Also the boiler regs in UK only allow for copper or steel in construction (Southern Fed) so you aren't likely to get it passed an inspector.

[duncan webster 1Participant @duncanwebster1]

I'd much rather be near a ductile boiler than a brittle one!

[Neil WyattModerator @neilwyatt]

I like the idea that a copper-nickel alloy hull can have a "payback period as short as 32 years" – that's long-term financial planning!

Neil

[nigel jones 5Participant @nigeljones5]

I wouldnt want to experience either. I once made a simple boiler out of exceptionally thin copper just to see if it would hold out, it did but it got thrown in the scrap bin anyway.

[julian atkinsParticipant @julianatkins58923]

I cant comment on the above.

I had a short length of 'copper alloy' ex RN tube given to me many years ago. Aparently used on very high pressure steam lines.

I cut it up for various things including a number of displacement lubricator tanks for hydrostatic sight feed type displacement steam oil lubricators on locos all tested to working pressure of the loco. I have not the slightest doubt it was the copper nickel alloy referred to above. It silver soldered beautifully.

Cheers,

Julian

[Simon CollierParticipant @simoncollier74340]

If it is any help, the Australian code allows cupro-nickel alloys 400 Monel and R405 Monel.

[Ebenezer GoodParticipant @ebenezergood76202]

Thanks for the advice, I hadn’t considered it might not be approved for use.

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