Polly Steam Plant

[Joseph Harland 1Participant @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

[Joseph Harland 1Participant @josephharland1]

[michael howarth 1Participant @michaelhowarth1]

It will dissolve when you pickle and rinse it.

Mick

[Joseph Harland 1Participant @josephharland1]

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

Joe

[Norman BillinghamParticipant @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

[Joseph Harland 1Participant @josephharland1]

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

[Author]

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