[Steam-engine] RE: feedwater

[Richard Strobel]

Personally I like the idea...if I ever do this tho..I'll practice on a piece 
of scrap.  I imagine thread engagement is the final product.

Thanks Andy
RickinMt.


----- Original Message ----- 
From: "Andy glines" <pioneersop96 at yahoo.com>
To: "Steam-engine mailing list" <steam-engine at lists.stationary-engine.com>
Sent: Thursday, November 17, 2005 7:30 AM
Subject: Re: [Steam-engine] RE: feedwater


> Its funny that I'm the one who made this suggestion
> because I have bee agonizing over doing the same thing
> with the Huber.  The way it was plumbed was having the
> feed from the injector and the water from the
> crosshead pump enter at the same place.  The whole
> point of two feedwater sources is redundancy which my
> system doesn't provide.  For some reason I really
> don't want to put another hole in my boiler.  Guess
> I'll have to get over it.
> Let's talk about how to make the new hole.  We
> discussed this at the '04 Pawnee Steam School.  I'll
> share the method that we talked about.  Determine the
> size of the hole needed from a tap drill chart.
> Instead a drilling an reaming to the proper size you
> want to drill the hole undersized.  Now we will expand
> the small hole to the proper size.  Heat the area
> around the hole red hot then drive in a tapered punch
> to expand the hole.  Only drive the punch in a little
> then reheat.  If we get to aggressive with the
> expanding we could cause cracks.  Keep tabs on the
> hole size so it doesn't get to big.  Stop expanding
> while the hole is still slightly small.  After the
> work piece has cooled, ream the hole to the proper
> size for tapping.  The idea behind expanding the hole
> with a tapered punch is to upset the metal around the
> hole making it thicker.  FYI "upsetting" is a
> blacksmith's term for working metal in such a way that
> it becomes shorter and thicker.
>
> comments please??
>
> --- Blake <blake at little-mountain.com> wrote:
>
> > That might be the best suggestion so far. Why not
> > just drill and
> > tap a new feed water opening? There should be no
> > reason you can't
> > do that as you're not doing any welding whatsoever.
> >
> > Blake
>
>
> Andy Glines
> Evansville, IN
>
>
>
>
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