Firearm & Gun Forum - FireArmsTalk.com > General Discussion Forums > The Club House > Do Not Approach A Burning Compressed Gas Delivery Truck!

Reply
 
LinkBack Thread Tools Display Modes
Old 07-20-2013, 04:07 AM   #11
Camo, you are lucky to see it.
FTF_SUPPORTER.png
Feedback Score: 0 reviews
 
KG7IL's Avatar
 
Join Date: Sep 2010
Location: Eatonville,Washington. My nearest neighbors are cows.
Posts: 2,414
Liked 1704 Times on 943 Posts
Likes Given: 5195

Default

Our old trash fire (in the good old days) would sometimes pop an aerosol can. Best we could do with the resources we had.

KG7IL is offline  
 
Reply With Quote
Old 07-20-2013, 09:49 AM   #12
Moderator
FTF_MODERATOR.png
Feedback Score: 0 reviews
 
c3shooter's Avatar
 
Join Date: Feb 2008
Location: Third bunker on the right,Central Virginia
Posts: 16,362
Liked 8413 Times on 3646 Posts
Likes Given: 1300

Default

Dad- the standard pressure relief valve setting is 250 psi. In a fire, pressure goes up, valve opens, released propane burns but does not explode.

However, a pool fire under a tank, or a jet fire impinging ON the tank does 2 things. It raises pressure- AND- at the top of the level of liquid in the tank, a stress line is developed. Metal below liquid level transfers heat to liquid. Metal ABOVE liquid cannot transfer heat to vapor. Uneven heating results, causing deformation of metal. At around 121% above the PRV setting, under THOSE conditions, wall can tear, and BLEVE.

Changing temp of propane makes major change in pressure inside tank.
70 F = 96 PSI
100 F = 127 PSI
110 F = 230 PSI

Under MOST circumstances, the PRV does it's job, and no explosion. However, heat it rapidly enough, pressure increase is SO rapid, the PRV cannot keep up. And propane tanks are built to a VERY different spec than ordinary compressed gas cylinders. Oxygen tanks are at 2080 psi, and have a rupture pressure far higher.

Yeah, I am just a veritable fount of obscure and useless info.

__________________

<--- Your Moderators at our weekly Troll Hunt

c3shooter is offline  
Vikingdad Likes This 
Reply With Quote
Old 07-20-2013, 10:21 AM   #13
Feedback Score: 0 reviews
 
Wrangler44's Avatar
 
Join Date: Jun 2013
Posts: 26
Liked 19 Times on 10 Posts

Default

Quote:
Originally Posted by Rick1967
It is also amazing how many stupid people drove past on the other side of the freeway while they were blowing up. I am betting the only reason no one else came through is because enough people stopped that no one else could get through.
In the fire service we call this job security.
__________________
Wrangler44 is offline  
 
Reply With Quote
Reply

Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Firearms Forum Replies Last Post
Delivery Driver Wins kytowboater Firearms in the Media 0 05-28-2013 09:16 AM
Compressed Air Fun! Vikingdad The Club House 8 01-22-2013 03:27 AM
Compressed Loads mrb1982 Ammunition & Reloading 20 12-12-2011 07:06 PM
Unique, 9MM, & Compressed Load? Richz99 Ammunition & Reloading 1 07-04-2011 09:19 AM
Delivery may be a little rough but This man Gets it safedman Politics, Religion and Controversy 20 04-04-2011 02:35 AM



Newest Threads