[TheForge] Teaching blacksmithing and insurance

[Peter Fels And Phoebe Palmer]

Hi Jeff:
I have 2000' of water line going under the highway and up a steep little 
canyon. That's the static pressure, but there's a lot of line friction.
Just because I'm getting old I'm sure, the thought of a steel vessel, 
yellow hot, under pressure in a structure of red hot bricks gave me pause.
I saw a pottery kiln explode once ( black smoke ignition)  and it threw 
bricks 50 '. That's an undesirable temperature for flying objects.
But; grin, it looks like a hell of a lot of fun and produces a somewhat 
different effect.
So, I have the water pressure and the size of the bodys were larger than 
I can easily heat.
Last factor, the water isn't very compressable and I was careful to 
exclude all air so when the steel or the weld failed abruptly it was no 
big deal.
The steel varied from 14 to 18 ga and was preshaped in some instances, 
double layers of flat inflated in others. I also did some in 20 ga 
roofing copper..was funny but fragile.
When they were ready for chasing, I capped  the inlet tube and  used the 
water inside for the backup. worked to some degree....probably work 
better for softer metals.
Pete F


Barking Crow wrote:

>Peter,
>
>I curious how you get 130 psi with water and what made you want to use water
>instead of air?   Also, why you'd want to do it cold?  Was the object to
>large to heat?  I guess if it worked it would save a lot of trouble.  How
>thick was the stock?  Interesting idea.
>
>Jeff Valentine
>
>
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