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#1
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LS3a oxygen cylinder specification
I am trying to get my oxygen cylinder inspected for refilling. It is due
for a hydro test and inspection. However there has been a shake up of cylinder inspections in the local dive industry and as a result the inspector is checking all the paperwork very thoroughly. Unfortunately he cannot identify the manufacture specification from the markings on the cylinder, which is a bit of an issue. The cylinder was supplied by Rolladen Schneider, with my LS3a, when it was delivered new. It is a steel 4l cylinder, manufactured in Germany in 1979 that fits exactly into the molded O2 cylinder recess in the glider. Does anybody know what the applicable manufacturing specification would been at that time? Thanks Ian |
#2
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LS3a oxygen cylinder specification
On Tuesday, December 3, 2019 at 2:33:48 AM UTC-8, ian wrote:
I am trying to get my oxygen cylinder inspected for refilling. It is due for a hydro test and inspection. However there has been a shake up of cylinder inspections in the local dive industry and as a result the inspector is checking all the paperwork very thoroughly. Unfortunately he cannot identify the manufacture specification from the markings on the cylinder, which is a bit of an issue. The cylinder was supplied by Rolladen Schneider, with my LS3a, when it was delivered new. It is a steel 4l cylinder, manufactured in Germany in 1979 that fits exactly into the molded O2 cylinder recess in the glider. Does anybody know what the applicable manufacturing specification would been at that time? Thanks Ian Ian, perhaps this document is useful. Jim https://www.eiga.eu/publications/eig...-on-cylinders/ |
#3
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LS3a oxygen cylinder specification
On 12/3/19 6:44 PM, JS wrote:
On Tuesday, December 3, 2019 at 2:33:48 AM UTC-8, ian wrote: I am trying to get my oxygen cylinder inspected for refilling. It is due for a hydro test and inspection. However there has been a shake up of cylinder inspections in the local dive industry and as a result the inspector is checking all the paperwork very thoroughly. Unfortunately he cannot identify the manufacture specification from the markings on the cylinder, which is a bit of an issue. The cylinder was supplied by Rolladen Schneider, with my LS3a, when it was delivered new. It is a steel 4l cylinder, manufactured in Germany in 1979 that fits exactly into the molded O2 cylinder recess in the glider. Does anybody know what the applicable manufacturing specification would been at that time? Thanks Ian Ian, perhaps this document is useful. Jim https://www.eiga.eu/publications/eig...-on-cylinders/ Thanks that looks very interesting, I am sure we can tie my cylinder back to an original inspection. Also a lot of other information on that site, including lists of known defective cylinders (I don't believe mine is on that list). Any idea what the actual manufacturing spec would have been applicable in Germany in the late 1970's? Ian |
#4
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LS3a oxygen cylinder specification
Interesting document on pressure tank markings. Is there a US version of this somewhere?
Thanks, John |
#5
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LS3a oxygen cylinder specification
On Wednesday, December 4, 2019 at 7:55:41 AM UTC-8, John DeRosa OHM Ω http://aviation.derosaweb.net wrote:
Interesting document on pressure tank markings. Is there a US version of this somewhere? Thanks, John Of course I can't find a document I've had for years, a simple explanation of cylinder markings! Here's a course from Los Alamos National Lab. https://permalink.lanl.gov/object/tr...LA-UR-13-28838 And cylinder manufacturer markings. http://www.ctcseminars.com/files/tec...GRLIST2017.pdf Jim |
#6
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LS3a oxygen cylinder specification
On 12/3/19 6:44 PM, JS wrote:
On Tuesday, December 3, 2019 at 2:33:48 AM UTC-8, ian wrote: I am trying to get my oxygen cylinder inspected for refilling. It is due for a hydro test and inspection. However there has been a shake up of cylinder inspections in the local dive industry and as a result the inspector is checking all the paperwork very thoroughly. Unfortunately he cannot identify the manufacture specification from the markings on the cylinder, which is a bit of an issue. The cylinder was supplied by Rolladen Schneider, with my LS3a, when it was delivered new. It is a steel 4l cylinder, manufactured in Germany in 1979 that fits exactly into the molded O2 cylinder recess in the glider. Does anybody know what the applicable manufacturing specification would been at that time? Thanks Ian Ian, perhaps this document is useful. Jim https://www.eiga.eu/publications/eig...-on-cylinders/ That was useful but still not enough for the inspector. They could identify the inspectorate stamping. But the need to identify the manufacturer as well as the standard that it was made to. Any suggestions on interpreting the manufacturer's markings as well the applicable standard? Thanks Ian |
#7
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LS3a oxygen cylinder specification
Why go through all of the bureaucratic BS? If a dive shop has to comply with excessive inspection protocols, take the cylinder to a hydrotest facility that deals with welding cylinders. I have been getting cylinders tested through Argyle Welding (company has been bought by Praxair https://www.praxair.com/). Cost is about $35 and it generally takes a week or so.
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#9
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LS3a oxygen cylinder specification
If it was any cylinder except the steel one you have, I would just say bite the bullet and replace it with a new aluminum cylinder. Unfortunately, the receptacle in the LS-3 ONLY accepts that particular size, and they are difficult to find. The aluminum equivalent is too large in diameter to fit in the mount socket, and modifying the 'glass is a difficult job that brings its own problems with getting approval for the change. Where are you located? I might be able to direct you to a hydrotest facility that won't make you jump through flaming hoops. (Never a good idea with an O2 cylinder :-)
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#10
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LS3a oxygen cylinder specification
wrote on 12/6/2019 6:52 AM:
If it was any cylinder except the steel one you have, I would just say bite the bullet and replace it with a new aluminum cylinder. Unfortunately, the receptacle in the LS-3 ONLY accepts that particular size, and they are difficult to find. The aluminum equivalent is too large in diameter to fit in the mount socket, and modifying the 'glass is a difficult job that brings its own problems with getting approval for the change. Where are you located? I might be able to direct you to a hydrotest facility that won't make you jump through flaming hoops. (Never a good idea with an O2 cylinder :-) Expensive, perhaps, but can a cylinder that fits be purchased from Europe? In one of my older gliders, a medical bottle would barely fit, but it did go in. -- Eric Greenwell - Washington State, USA (change ".netto" to ".us" to email me) - "A Guide to Self-Launching Sailplane Operation" https://sites.google.com/site/motorg...ad-the-guide-1 |
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