[modeleng] Re: Copper boilers
- From: "Clif Walker" <clif.gwr@xxxxxxxxxxxxxx>
- To: <modeleng@xxxxxxxxxxxxx>
- Date: Thu, 2 Dec 2004 19:47:33 -0000
Hi All,
Other factors come into play as well on Copper Boilers.
Some of the older ones have the joints brazed,this can suffer from
dezincification in some water areas.What happens here is the Zinc disappears
from the brass used to braze the joint leaving only a very porous soft
copper behind which has almost no strength.In fact you can almost wipe the
copper away with your fingers.
The tell tail sign is a pinky look to the metal, you can also see this
happen on some brass fittings.It happens a lot on domestic hot water systems
in some places.
Because of this, if the Boiler inspector knows that the boiler is pretty old
he will insist on all of the cleading taken off so that he can see the
joints.
Needless to say if a Boiler has got a bad dose of this it is a new boiler
job as the joints cannot be repaired.
I have not looked but I believe that there is a lot of information on the
internet about this problem.
Regards
Clif
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