[modeleng] Re: Expanding boiler tubes

The trouble with steel tubes is they don't last long, copper will last the 
life of the boiler.The boilermaker  will make more money renewing the steel 
tubes.

E.W.
----- Original Message ----- 
From: "Roger" <roger.g3tdm@xxxxxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: Wednesday, January 26, 2005 4:34 PM
Subject: [modeleng] Re: Expanding boiler tubes


> Hi,
>
>     Andy asked:
>
>>How do I go about expanding copper  tubes into a steel boiler?
>>
>    I see that you have had various ideas suggested,  including the
> proper way with a roller tool.
>
>    I friend of mine who had a leak at the firebox end of an engine and
> didn't have a proper roller tool discovered that an expanding masonry
> bolt (Rawl Bolt) could be used to expand the tube - it certainly
> worked,  but is not the recommended method!
>
>    If you do the arithmetic it is surprising just how much more the
> copper expands,  compared to the steel shell - it is no wonder that the
> tubes leak where they go into the steel plates.   I talked to a
> professional boiler builder about this and he reckoned a steel boiler
> with copper tubes always gave trouble and recommended that the copper
> tubes be replaced with steel tubes expanded into place.
>
>    Just thought you would like to know about the above!
>
>
>       Cheers,
>
>
>          Roger Mason,  in St. Agnes.
>
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