if it passes maybe publish the shop name that failed it here and hopefully they can explain.......or get more training ..........it might be they have a bad operator who can get more training ...
Failed Hydro
- Thread starter rob.mwpropane
- Start date
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Dialog in court: Attorney representing the dead technician to Hydro shop owner: "So you knowingly placed a failed steel tank in your test machine"?
OP
I took it directly to the hydro shop that they all use.
I don't like "bad mouthing" places, but if it saves someone's tanks I'll be happy to. And it's not so much the LDS as they just "take it to the hydro shop"....but you would think that by now they would know something is up if they have more fails than normal.
All dependent on if my tank passes or not. I don't really want to throw out any names in case it fails.... (although I think I've mentioned all of them in this thread).
Hopefully along the way I can get the hydro shop to change their ways and save some tanks....but I highly doubt it. Scuba is not their main income.
OP
Why would that matter? A failed tank put through a hydro test can't "explode". I don't understand?
Edit: from my limited understanding the "worst" that can happen during a hydro test is that it won't hold water pressure and they watch it go down... I don't know if all places are the same, but the 2 places I have been dealing with use water in the cylinder and a water jacket outside.... there is absolutely no chance of anything happening beside a water pressure drop on a gauge.
tmassey
Contributor
That’s why it is a “hydrostatic” test. What makes scuba tanks dangerous is they are filled with highly compressed *gas*. It acts like an incredibly massive and powerful spring. When a tank ruptures, all that spring energy is released violently. And there’s nothing outside of the tank to absorb all of that violently released energy.
In a hydrostatic test, there’s water inside the tank. The water inside the tank is under pressure, but it’s not compressed like a spring. So when it lets go, there’s very little spring force behind it. And, of course, the tank is put into a an environment designed to absorb the much reduced energy that is released if tank were to let go.
after all, it would be really silly to create a test environment that is designed to stress tanks beyond their normal operating environment and then not design it to deal with the repercussions.
captain
Contributor
I know Alec, have dived with him at vintage diving events.
OP
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