Teamfour
Guest
I need to keep my filled tank inside my truck for about 4 hours. Any danger?
Keeping tank inside of truck?
- Thread starter Teamfour
- Start date
Please register or login
Welcome to ScubaBoard, the world's largest scuba diving community. Registration is not required to read the forums, but we encourage you to join. Joining has its benefits and enables you to participate in the discussions.
Benefits of registering include
- Ability to post and comment on topics and discussions.
- A Free photo gallery to share your dive photos with the world.
- You can make this box go away
Teamfour:
I've had to do the same off and on for the past couple weekends. I've been keeping my back windows rolled down a bit. If they are in the back I park my car in the shade if possible.
http://www.searover.com/rca/scuba/opinions/scuba_opn_burst_disks.shtml
The math looks right.
Also:
http://www.deep-six.com/page70.htm
Which includes "As a general rule, for every change in temperature of one degree Fahrenheit, the pressure in a scuba tank changes about 5 psi."
A burst disk at 1.4x working rating = 1.4*3000 = 4200psi. The margin, then, before the burst disk would fail is 4200 - 3000 = 1200 psi.
1200 psi/5 psi-per-degree-F = 240F. If your measured full fill was 3000 psi at an ambient temp of 80F, your trunk temp would need to go up to about 320F (240 + 80) to blow the disk.
If your trunk is that hot, use it as a broiler
The results are consistent between the two references -- the ballpark 5 psi-per-F that I quoted from the second source would result in 3200psi for a delta T of 40F, while the first site shows the "real" value of 215 psi differential -- close enough for general calculations.
That said, I still crack my windows on hot days, just because I dislike sitting in a really hot car.
The math looks right.
Also:
http://www.deep-six.com/page70.htm
Which includes "As a general rule, for every change in temperature of one degree Fahrenheit, the pressure in a scuba tank changes about 5 psi."
A burst disk at 1.4x working rating = 1.4*3000 = 4200psi. The margin, then, before the burst disk would fail is 4200 - 3000 = 1200 psi.
1200 psi/5 psi-per-degree-F = 240F. If your measured full fill was 3000 psi at an ambient temp of 80F, your trunk temp would need to go up to about 320F (240 + 80) to blow the disk.
If your trunk is that hot, use it as a broiler
The results are consistent between the two references -- the ballpark 5 psi-per-F that I quoted from the second source would result in 3200psi for a delta T of 40F, while the first site shows the "real" value of 215 psi differential -- close enough for general calculations.
That said, I still crack my windows on hot days, just because I dislike sitting in a really hot car.
markfm:http://www.searover.com/rca/scuba/opinions/scuba_opn_burst_disks.shtml
The math looks right.
Also:
http://www.deep-six.com/page70.htm
Which includes "As a general rule, for every change in temperature of one degree Fahrenheit, the pressure in a scuba tank changes about 5 psi."
A burst disk at 1.4x working rating = 1.4*3000 = 4200psi. The margin, then, before the burst disk would fail is 4200 - 3000 = 1200 psi.
1200 psi/5 psi-per-degree-F = 240F. If your measured full fill was 3000 psi at an ambient temp of 80F, your trunk temp would need to go up to about 320F (240 + 80) to blow the disk.
If your trunk is that hot, use it as a broiler
The results are consistent between the two references -- the ballpark 5 psi-per-F that I quoted from the second source would result in 3200psi for a delta T of 40F, while the first site shows the "real" value of 215 psi differential -- close enough for general calculations.
That said, I still crack my windows on hot days, just because I dislike sitting in a really hot car.
WOW! Thanks for that explanation.
Similar threads
