Polly Steam Plant

Polly Steam Plant

This topic has 5 replies, 3 voices, and was last updated 5 March 2020 at 06:04 by Joseph Harland 1.

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2 March 2020 at 05:34 #454960
Joseph Harland 1
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@josephharland1
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
Advert

2 March 2020 at 05:34 #33537
Joseph Harland 1
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@josephharland1
2 March 2020 at 07:56 #454964
michael howarth 1
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@michaelhowarth1
It will dissolve when you pickle and rinse it.

Mick
2 March 2020 at 10:27 #454990
Joseph Harland 1
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@josephharland1
Thanks Mick, I was worrying about how to rinse out the inside – there are only 2 small openings.

Joe
2 March 2020 at 11:57 #455010
Norman Billingham
Participant
@normanbillingham91454
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
5 March 2020 at 06:04 #455450
Joseph Harland 1
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@josephharland1
Thanks for the advice Norman (and Mick), I am carrying on.
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