You say there was nothing scary to report,
"Me" filling the position of the typical "new" reporter on the staff at your
local news agency questions......
First off could we say that you were not on a bicycle and you were actually
in your car? That sounds soooo much more exciting.
When you had your blow out, were there any by-standers that saw what
happened? Do you think the rain we had last night contributed to the flat?
Were the road conditions treacherous? Can you tell us where you were going
when this all happened. What do you think would have happened had you run
in to a concrete wall as a result of the flat? Do you think oil prices will
cause you to buy a cheaper replacement tire? Did your ABS come into play?
Were any of the other passengers in your car injured? Are you going to sue
the tire company? Do you think the speed that you were driving at had any
contributing factors to the this catastrophic tire failure? Being near the
air port at the time were you in fear of hitting an air plane on the runway?
This is "so in so" the next big reporter in "your home town" on the scene
reporting on the terrible accident caused by poor quality tires near the
airport where a vehicle" skidded into a crash" as a result of rapid air loss
in the spare tire.
Back to you Domique.
Okay, good point, low-pressure systems quite possibly aren't subject to the
same regulations in terms of testing and certification, mea culpa. But I
still treat any compressed gas with respect, I've seen too many people on
their way to the hospital as a result of having too casual an attitude
towards compressed gas, same as with any power tool.
Catastrophic tank failures usually include a fuel source.
Air pressure alone (within the range of the safety valve) is not
likely to blow a tank apart and have shrapnel fly all over the place.
There simply isn't enough stored energy to do that. It isn't a
My compressor, a dual tank Emglo, was purchased in 1987. About 8 years ago
it developed leakage around the bottom supports (the rails that hold it off
the ground). A friend tried to repair it using a MIG welder, to no avail.
Then I posted the problem to some newsgroup or another and someone posted
his fix: use epoxy. I did so and am still using that compressor (though I
think I'm beginning to hear another leakage hiss).
Thanks, Lee. The important part for me is that it was a "leaking
hiss", not a catastrophic failure. My carry tank is cheap enough that
I will just replace rather than try to fix it when the time comes. But
I am cheap enough not to want to replace it just because of some date
stamp, as long as I am not creating a safety hazard.
Alex -- Replace "nospam" with "mail" to reply by email. Checked infrequently.
If you use it in a business with other folks around, you might
consider replacing to limit your liability regardless of how well you
believe the repairs have been done. The ASME code certification is
invalidated by repair to the tank without opening a new code
certification which can be done, but not worth the cost on that type
of tank. Very small chance of any injury, but it could blow a fitting
or a glob of rust/epoxy.
if you use it for personal use then it doesn't really matter that much
if you are confident of the repairs.
I used to manufacture tanks to ASME codes. Can't remember an
expiration date ever being part of the process. Also did due
diligence on a manufacturer of air compressors and then worked in a
tool group that included a compressor manufacturer (not the same one).
To my knowledge, no expiration dates there.
Hgh pressure dive tanks have an expiration date, that is they have to
be visually inspected periodically and then hydrostatically tested
periodically or their certification "expires". If they don't pass
either one, they are not returned to you. They are dangerous when
worn, but normally take 2000 psi or greater.
As far as failure mode on a 125-150 psi working pressure tank, if rust
occurs internally then it may cause a slow leak that will get worse
until the tank won't hold any more, but not catasrophic. I have seen
a poorly seated drain coupling blow out with force but towards the
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