If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
|
Thread Tools | Display Modes |
#11
|
|||
|
|||
Retesting and filling oxygen tank.
On May 5, 10:06*am, bumper wrote:
If the tank is "portable", and you will be having it hydro tested locally, I suggest NOT using a welding supply place unless they test on-site. If they throw a bunch of bottles in a truck to send off for testing, your nice bottle will not come back looking the same. bumper Yep, welding supply shops can be tricky. Once I was on a errand to pick up a refilled (large type) O2 bottle. While I waited for my turn at the counter, I noticed a truck being unloaded at the dock. It was loaded with green O2 bottles - none of which showed the blue "Aviation Oxygen" sticker. Since I couldn't see any Aviation Oxygen bottles, I told the counterman I wouldn't be surprised if he couldn't fill my order. "No problem", he said, "Watch". He opened a drawer, retrieved a sheet of blue Aviation Oxygen stickers and slapped one on the nearest green bottle. "Now, he said, "I can sell you an Aviation Oxygen bottle - that will be $115." "How much would it be without the sticker?" "$35", he said. It's surprising how honest people can be at times. |
#12
|
|||
|
|||
Retesting and filling oxygen tank.
We use a lot of oxygen in Minden. All the bottles I see are hydrotested by a local fire extinguisher company, which is certified by the DOT. I'm not telling you how to do it, just how we do it here. Fred
|
#13
|
|||
|
|||
Retesting and filling oxygen tank.
Wasn't it P.T. Barnum who said, "There's a sucker born every minute"?
ABO - Hah! I only had one year of chemistry in college, but I do recall that an element is an element is an element. Oxygen is oxygen. "Bill D" wrote in message ... On May 5, 10:06 am, bumper wrote: If the tank is "portable", and you will be having it hydro tested locally, I suggest NOT using a welding supply place unless they test on-site. If they throw a bunch of bottles in a truck to send off for testing, your nice bottle will not come back looking the same. bumper Yep, welding supply shops can be tricky. Once I was on a errand to pick up a refilled (large type) O2 bottle. While I waited for my turn at the counter, I noticed a truck being unloaded at the dock. It was loaded with green O2 bottles - none of which showed the blue "Aviation Oxygen" sticker. Since I couldn't see any Aviation Oxygen bottles, I told the counterman I wouldn't be surprised if he couldn't fill my order. "No problem", he said, "Watch". He opened a drawer, retrieved a sheet of blue Aviation Oxygen stickers and slapped one on the nearest green bottle. "Now, he said, "I can sell you an Aviation Oxygen bottle - that will be $115." "How much would it be without the sticker?" "$35", he said. It's surprising how honest people can be at times. |
#14
|
|||
|
|||
Retesting and filling oxygen tank.
On Monday, May 7, 2012 12:08:34 PM UTC-5, Dan Marotta wrote:
Wasn't it P.T. Barnum who said, "There's a sucker born every minute"? ABO - Hah! I only had one year of chemistry in college, but I do recall that an element is an element is an element. Oxygen is oxygen. "Bill D" wrote in message ... On May 5, 10:06 am, bumper wrote: If the tank is "portable", and you will be having it hydro tested locally, I suggest NOT using a welding supply place unless they test on-site. If they throw a bunch of bottles in a truck to send off for testing, your nice bottle will not come back looking the same. bumper Yep, welding supply shops can be tricky. Once I was on a errand to pick up a refilled (large type) O2 bottle. While I waited for my turn at the counter, I noticed a truck being unloaded at the dock. It was loaded with green O2 bottles - none of which showed the blue "Aviation Oxygen" sticker. Since I couldn't see any Aviation Oxygen bottles, I told the counterman I wouldn't be surprised if he couldn't fill my order. "No problem", he said, "Watch". He opened a drawer, retrieved a sheet of blue Aviation Oxygen stickers and slapped one on the nearest green bottle. "Now, he said, "I can sell you an Aviation Oxygen bottle - that will be $115." "How much would it be without the sticker?" "$35", he said. It's surprising how honest people can be at times. .... Oxygen is oxygen. I was just studying with my 2012 Private Pilot Test Prep book and found a relevant and hopefully interesting passage: "Aviation oxygen should be used to replenish an aircraft oxygen systems... Oxygen used for medical purposes or welding normally should not be used because it may contain too much water. Specifications for Aviators' breathing oxygen are 99.5% pure oxygen and not more than .005 mg of water per liter of oxygen." |
#15
|
|||
|
|||
Retesting and filling oxygen tank.
On May 7, 12:42*pm, wrote:
On Monday, May 7, 2012 12:08:34 PM UTC-5, Dan Marotta wrote: Wasn't it P.T. Barnum who said, "There's a sucker born every minute"? ABO - *Hah! *I only had one year of chemistry in college, but I do recall that an element is an element is an element. *Oxygen is oxygen. "Bill D" wrote in message .... On May 5, 10:06 am, bumper wrote: If the tank is "portable", and you will be having it hydro tested locally, I suggest NOT using a welding supply place unless they test on-site. If they throw a bunch of bottles in a truck to send off for testing, your nice bottle will not come back looking the same. bumper Yep, welding supply shops can be tricky. Once I was on a errand to pick up a refilled (large type) O2 bottle. While I waited for my turn at the counter, I noticed a truck being unloaded at the dock. It was loaded with green O2 bottles - none of which showed the blue "Aviation Oxygen" sticker. Since I couldn't see any Aviation Oxygen bottles, I told the counterman I wouldn't be surprised if he couldn't fill my order. *"No problem", he said, "Watch". *He opened a drawer, retrieved a sheet of blue Aviation Oxygen stickers and slapped one on the nearest green bottle. *"Now, he said, "I can sell you an Aviation Oxygen bottle - that will be $115." *"How much would it be without the sticker?" "$35", he said. It's surprising how honest people can be at times. ... Oxygen is oxygen. I was just studying with my 2012 Private Pilot Test Prep book and found a relevant and hopefully interesting passage: "Aviation oxygen should be used to replenish an aircraft oxygen systems.... Oxygen used for medical purposes or welding normally should not be used because it may contain too much water. *Specifications for Aviators' breathing oxygen are 99.5% pure oxygen and not more than .005 mg of water per liter of oxygen." That information was true 100 years ago but it's about a century out of date. Oxygen today is made from a liquid air reduction process which produces chemically pure oxygen. This is what is supplied to all users. There's no incentive for the industry to deliberately produce contaminated oxygen. There is zero water in any compressed oxygen sold today. If you dig a bit further, you'll find specifications for welding and medical oxygen are far tighter than for 'aviation oxygen'. |
#16
|
|||
|
|||
Retesting and filling oxygen tank.
On Monday, May 7, 2012 2:11:21 PM UTC-5, Bill D wrote:
On May 7, 12:42*pm, wrote: On Monday, May 7, 2012 12:08:34 PM UTC-5, Dan Marotta wrote: Wasn't it P.T. Barnum who said, "There's a sucker born every minute"? ABO - *Hah! *I only had one year of chemistry in college, but I do recall that an element is an element is an element. *Oxygen is oxygen. "Bill D" wrote in message .... On May 5, 10:06 am, bumper wrote: If the tank is "portable", and you will be having it hydro tested locally, I suggest NOT using a welding supply place unless they test on-site. If they throw a bunch of bottles in a truck to send off for testing, your nice bottle will not come back looking the same. bumper Yep, welding supply shops can be tricky. Once I was on a errand to pick up a refilled (large type) O2 bottle. While I waited for my turn at the counter, I noticed a truck being unloaded at the dock. It was loaded with green O2 bottles - none of which showed the blue "Aviation Oxygen" sticker. Since I couldn't see any Aviation Oxygen bottles, I told the counterman I wouldn't be surprised if he couldn't fill my order. *"No problem", he said, "Watch". *He opened a drawer, retrieved a sheet of blue Aviation Oxygen stickers and slapped one on the nearest green bottle. *"Now, he said, "I can sell you an Aviation Oxygen bottle - that will be $115." *"How much would it be without the sticker?" "$35", he said. It's surprising how honest people can be at times. ... Oxygen is oxygen. I was just studying with my 2012 Private Pilot Test Prep book and found a relevant and hopefully interesting passage: "Aviation oxygen should be used to replenish an aircraft oxygen systems.... Oxygen used for medical purposes or welding normally should not be used because it may contain too much water. *Specifications for Aviators' breathing oxygen are 99.5% pure oxygen and not more than .005 mg of water per liter of oxygen." That information was true 100 years ago but it's about a century out of date. Oxygen today is made from a liquid air reduction process which produces chemically pure oxygen. This is what is supplied to all users. There's no incentive for the industry to deliberately produce contaminated oxygen. There is zero water in any compressed oxygen sold today. If you dig a bit further, you'll find specifications for welding and medical oxygen are far tighter than for 'aviation oxygen'. Well, I guess the source of at least some of the obviously widespread confusion is clear - our training materials are incorrect and/or just out of date and out of touch with technical reality. thanks. |
#17
|
|||
|
|||
Retesting and filling oxygen tank.
Bill:
In addition to being pure, bottled oxygen made from liquid air is also super dry -- all traces of water are frozen out in the process. So the old problem with oxygen not being dry is no longer an issue. |
#18
|
|||
|
|||
|
|
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Saturn V S-IC-T (static test stage) fuel tank assembly is mated to the liquid oxygen (LOX) tank 6416666.jpg | [email protected] | Aviation Photos | 0 | April 12th 07 01:33 AM |
Saturn I Liquid-Oxygen (LOX) Tank 6000382.jpg | [email protected] | Aviation Photos | 0 | April 10th 07 09:59 PM |
oxygen tank | Lignan Christian | Soaring | 10 | February 9th 06 10:52 PM |
filling Oxygen tanks | Bruce McFadden | Piloting | 40 | January 3rd 05 03:25 AM |
Filling oxygen tanks | Bruce McFadden | Owning | 49 | December 28th 04 11:41 PM |