Expansion Tanks as a Pressure Vessel?

[jsefcik]

at work everytime i go into the maintainence closet i keep looking at these water expansion tanks and say to myself that would make one hell of an air tank, it already has a schrader valve built in and other said has 3/4 pipe threads i dont see why it wouldnt work


ideas??? thoughts???

[jrrdw]

Look for pressure ratings and safe operating temperature ranges.

[jsefcik]

i just looked at the safe temps and said they are perfectly fine up to boiling water temps around 110-210 and pressures up to 120 psi,

personaly i dont see why you couldnt go higher, its pretty much a propane tank, so you should be able to pump alot of air in there

[jrrdw]

As always, safety is upon the user.

[Gippeto]

1) Expansion tanks have a bladder in them.

2) Cost...$60-90 around here, while propane tanks can be bought new for $35...or had for free once expired.

3) If someone throws out an expansion tank...it likely has a hole in it from corrosion...do you REALLY want a pressure vessel that's corroded thin?

4) That "free" expansion tank will still have a bladder in it.

[jsefcik]

1) Expansion tanks have a bladder in them.

2) Cost...$60-90 around here, while propane tanks can be bought new for $35...or had for free once expired.

3) If someone throws out an expansion tank...it likely has a hole in it from corrosion...do you REALLY want a pressure vessel that's corroded thin?

4) That "free" expansion tank will still have a bladder in it.

i wasnt aware of a bladder, but thanks,

[ramses]

3) If someone throws out an expansion tank...it likely has a hole in it from corrosion...do you REALLY want a pressure vessel that's corroded thin? .

or a tear in the bladder