Hyperbaric Chamber
We constructed a hyperbaric test chamber from a 6 foot length of
10" steel pipe with 1/2" thick wall. One end is closed off
with a flat plate reinforced with frames, and the other is fitted
with a reinforced 1/2" thick steel hatch designed to open inward so
avoid the necessity for a locking ring or flange bolts. Once
closed up and filled with water the chamber will be pressurized with
a pressure washer pump. The chamber will be able to withstand
pressures up to 2400 psi, or the equivalent of 5600 feet of see
water.
We are using closed cell foam, anti-fatique floor mat for the
hatch gasket. If that fails then Rod Kluwe suggested "Garlock
Blue" gasket for high pressure pipe lines.

3000 PSI Pressure Washer Pump
Horizontal Shaft, Cat General AR $190 |
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Notes:
Steel Pipe Ball Park PSI calculation:
P=2*S*t*F/D
P-pressure
S-SMYS (specified minimum yield strength of your pipe, e.g. 52,000
psi)
t-Pipe wall thickness
F--Design Factor (between 0 and 1, generally between .5 and .72 for
DOT regulated work)
D-Pipe outer diameter
52,000 psi is a middle of the road standard pipe commercially
available steel pipe strength. You can get pipe in the following
grades, Grade B (35,000 psi)
10.75" OD x 0.5 Wall, possibly Grade B
(2 * 35000 * 0.5 * .75) / 10.75 = 2442 psi / 0.433 = 5640 ft
4000 ft test / 0.433 = 1732 psi
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