On Tue, 6 Apr 2010 17:00:00 -0400, Stormin Mormon wrote:

At 150 PSI, they would be useful as expansion tanks for air
compressors.

Interesting idea!

1. Buy copper pipe
2. Drill ten holes 2 inches apart in the steel pipe for the threaded bolts
3. Tap the ten holes in the galvanized steel pipe for the threaded bolts
3. Drill an axial hole through the center of ten threaded bolts
4. Drill a hole through the center of ten soda caps for the threaded bolts
5. Screw the ten threaded bolts into the caps and then into the steel pipe
6. Cap one end of the steel pipe & place a chuck on the other end
7. Chuck the other end of the steel pipe onto your CO2 regulator hose
6. Screw ten 2 liter soda bottles onto the ten caps bolted to the pipe
7. Turn on the C02 gas and pressurize the twenty liters to 150psi
8. Remove the chuck
9. You now have 20 liters of 150psi portable C02!

QUESTION:
How many liters of gas does a typical automotive car tire take anyway?