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Re: [oletrucks] Air Compressor Update

To: "Ole Trucks" <oletrucks@autox.team.net>
Subject: Re: [oletrucks] Air Compressor Update
From: "WR Teto" <monadnoc@crystal-mtn.com>
Date: Tue, 23 May 2000 11:59:07 -0400
I work for a steel fab company that manufactures ASME code-stamped pressure 
tanks, and I spend a
good part of my time doing pneumatic and hydrostatic pressure testing.  Believe 
me, don't fool
around with unknown, jury-rigged pressure tanks.  All ASME tanks are tested at 
1-1/2 times their
code-stamped working pressures.  I have seen first-hand some exciting ruptures 
and there are
industry stories that would scare you to death.  One of our customers in the 
offshore oil drilling
industry was pressure testing to destruction, a pipe with caps welded on the 
ends.  They had
installed what they considered sufficient safety precautions.  The pipe finally 
let go at 30,000 psi
(!!), blowing one end-cap off.  The cap went through a 6" concrete wall, a 3 
foot thick dirt
barrier, and then through one of the employees cars.  Hydrostatic pressure is a 
lot safer (though
not fool-proof) due to the fact that water, unlike air, cannot be compressed.  
A failure results in
an instant drop of pressure, but catastrophic ruptures can still happen.

Bottom line is, don't build your own pressure tanks out of water heaters, oil 
drums, etc.  Unless of
course you need your 15 minutes of fame and probably a column in the local 

Wally / Templeton MA
53 3100 rod project
72 Chevy Malibu

> I would be suspicious of the same risk.  Normal city water pressures are
> around 60# & compressed air for shops usually runs around 125# (give or take
> 10-15#).  So it is about double.  I also have no real world experience with
> this, just speculating.

oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959

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