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Polly Steam Plant

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Joseph Harland 102/03/2020 05:34:10
10 forum posts

Hi All,

I'm in the middle of making a copy of Tubal Cain's POLLY.

Do I need to remove the remnants of silver brazing flux from inside the boiler and if so - how?

Joe Harland

mick H02/03/2020 07:56:55
723 forum posts
21 photos

It will dissolve when you pickle and rinse it.

Mick

Joseph Harland 102/03/2020 10:27:48
10 forum posts

Thanks Mick, I was worrying about how to rinse out the inside - there are only 2 small openings.

Joe

Norman Billingham02/03/2020 11:57:56
39 forum posts

We teach students on our basic course at SMEE to make Polly. So far I think we've had about 120 made. We use copper tube to make the boiler and just give it a wash through with hot water to remove flux residues after brazing in the end plates. We've never had a problem. It's actually more important to wash thoroughly when you've used soft solder with Bakers fluid flux as in soldering the firebox to the base - chloride residues from the flux can be corrosive to steel.

Good luck with the build

Joseph Harland 105/03/2020 06:04:19
10 forum posts

Thanks for the advice Norman (and Mick), I am carrying on.

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