[modeleng] Re: Boiler blues
- From: "R.L. Roebuck" <rlr20@xxxxxxxxxxxxxxxx>
- To: Model Engineering List <modeleng@xxxxxxxxxxxxx>
- Date: Mon, 12 Sep 2005 12:47:31 +0100 (BST)
Hi there Barrie,
Just a quick thought - do you really need to remove this coating?
Might it not burn away with time anyway?
Surely it can't do any harm to the boiler to have it there, infact may
even protect the inner surfaces of the tubes, and may have no appreciable
affect on the heat transfer.
If you really want to get rid of it, possibly some chemical means should
be tried, but definitely ought to be very careful what you use, try some
out on samples of copper and silver solder before you start.
Yours,
Rich.
PS Over 2000 pounds - ouch, that sounds painful!
On Mon, 12 Sep 2005, Barrie Purslow wrote:
> I am restoring a 5" Duchess the boiler of which is in generally good
> condition. However the flue tubes, which are about 15/16 ins. I.D., are
> coated internally with a layer of hard, black carbon. I have given it
> the usual flue brush treatment which produced clouds of black dust but a
> hard layer about 1/64 ins. thick remains. I have tried fitting the flue
> brush into an electric drill and giving the tubes a few minutes of
> rotary action to little effect. I am wary about trying anything more
> aggressive as I have heard quotes of over £2000 for a replacement
> boiler. Any ideas anyone? Barrie Purslow Warrington UK MODEL ENGINEERING
> DISCUSSION LIST.
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