You can give these guys a shot. I've used their location here a few times and they're always good.
http://www2.mathesongas.com/storeLocato ... pt=4&ra=25
That's a tough spot you're in. Hope you're able to find someone to help out.
General welding questions that dont fit in TIG, MIG, Stick, or Certification etc.
- Otto Nobedder
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Weldmonger
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Joined:Thu Jan 06, 2011 11:40 pm
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Location:Near New Orleans
While I haven't seen the composite bottles yet, I have ordered a nitrogen cylinder that could be filled to 4500PSI. I think the MAWP on it was 6000, but regulations restricted it to 4500. I also never used it. It proved a waste of time, as the idea was to pre-charge a system for a 9680psi test, and the pump we had for the job could accomplish the "pre-charge" faster than setting up the bottle then swapping in the pump.Arno wrote:...Is there no gas seller in the US region yet that carries the newer style 300bar/4350psi bottles like are getting more common here in Europe?...
Steve S
The composite ones are fairly new and specialised though and mostlly meant for easier portability. Fairly expensive too, but could probably mean the difference between being able to reach some locations or not.airrj wrote: So whether or not the cylinder can pass the test at 15 years it is scrap. This really adds to the cost of unit compared to aluminum or steel that can go for many more years.
They do tend to have a hard life being lugged around a lot (which is also why the protective pieces are on the top and bottom), so I suspect many of them will already get damaged enough in their lifecycle that they won't even need to last that long.
Also in many cases they are operated on an exchange/rental basis, so the end user doesn't really see the lifespan (or lack thereof), but they just end up more expensive to rent if they need to be replaced sooner..
Plain steel cylinders are still the norm though, but there the 300bar units are making inroads too.
Bye, Arno.
The 5 year hydo test has three outcomes, scrap, safe for indicated pressure and plus. The test involves measuring deformation of the cylinder under pressure and then measuring the yield volume after pressure is relieved.
Plus means 10% overfill pressure is allowed. My rudimentary gouges show 2500 psi. There is still a generous safety factor.
Steel at 2265 indicated lasts a very long time. I've had oxygen cylinders from the 1940s come through..lots of hydro stamps for sure.
If it works, why not?
Plus means 10% overfill pressure is allowed. My rudimentary gouges show 2500 psi. There is still a generous safety factor.
Steel at 2265 indicated lasts a very long time. I've had oxygen cylinders from the 1940s come through..lots of hydro stamps for sure.
If it works, why not?
- Otto Nobedder
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Weldmonger
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Joined:Thu Jan 06, 2011 11:40 pm
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Location:Near New Orleans
I have a favorite bottle I use for helium, exclusively, for helium leak testing. It's original test date is March 1919, and the neck ring reads, "Army Air Service Balloon."
It's currently out of date, and I intend to have it retested in March of 2019, and have the recertification date stamped directly under the original test date, for a "century cylinder".
Steve S
It's currently out of date, and I intend to have it retested in March of 2019, and have the recertification date stamped directly under the original test date, for a "century cylinder".
Steve S
ryanjames170
- ryanjames170
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Guide
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Joined:Sun Sep 25, 2016 12:46 pm
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Location:Wisconsin
That's pretty sweet manOtto Nobedder wrote:I have a favorite bottle I use for helium, exclusively, for helium leak testing. It's original test date is March 1919, and the neck ring reads, "Army Air Service Balloon."
It's currently out of date, and I intend to have it retested in March of 2019, and have the recertification date stamped directly under the original test date, for a "century cylinder".
Steve S
Welder/Fitter
RM Fab & Products
Lincoln Invertec V300 pro
Miller 54D Wire Feeder
Miller 2E DC Welder Generator
Everlast Power IMIG 200
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Klutch Plasma 275i Plasma Cutter
Hobard/Smith Oxy Torch using propane.
RM Fab & Products
Lincoln Invertec V300 pro
Miller 54D Wire Feeder
Miller 2E DC Welder Generator
Everlast Power IMIG 200
Everlast Power ARC 200ST
Klutch Plasma 275i Plasma Cutter
Hobard/Smith Oxy Torch using propane.
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