important safety suggestion to help ur self not get blown up

[Chronobreak]

Actually, its not the heat, its the compressing of an air and oil mix. Its the same as how a diesel engine works. the tank doesnt quite get hot enough to ignite the mixture. Now dont gewt me wrong, some tanks are filled to an unsafe temp, but not high enough to ignite. The compression to 4500psi does it.

Chronobreak, no oil will work in fill nipples. We used to do it all the time also, I think the difference is how fast we're filling the tanks these days. The person whos tank blew up, prolly did fill the nipple with oil alot, for it to do that.

Don Miguel, sorry, but for a tank to actually blow the whole bottom of the tank off, would require tank damage beyond comprehension. The tank that "Exploded" didnt really explode, the reg threads seperated and the tank came away from the reg. Tanks dont "Explode". A tank failure is usally a very small hole, pinhole size. any picture of a tank thats lokks truely blown up, was filled to about 13,000-20,000 psi, to see how far they could actually go up in pressure.

Shane-O

the only tanks i have seen explode were in APG i believe and were filled to 12~k for testing/demonstration purposes.

shane, thanks for the confirmation as i know i can trust YOU on the subject, il make sure no oil goes into tanks to stop a leaky fill nipple

i have noticed xtreme doesnt flash fill, i always tell the refs here to NOT do it, but usualy they stil do when airing up our rentals in a hurry

flash fils are also bad or dangerous for numerous other reasons as well.

[Beemer]

Actually, its not the heat, its the compressing of an air and oil mix. Its the same as how a diesel engine works. Shane-O

So I dont need heat now just fuel and air and some compressing? In a diesel it is the Heat of the compressed air that lights the fuel. The compression is 14:1 or higher. Lower the compression and what happens?

How come a Mag valve gets warm after rapid fire? How come the fill nipple is Hot after a slam fill? You can add all the oil ya want if you compress it Sloooow enough it wont flash.
You need heat, spark or flame no matter how ya slice it. How come my tank pressure drops off after a slam fill?

[chemical x]

Thank you dark wolf

I wouldnt have seen this had it not been posted. I have seen warnings before about oil in HPA bottles but I didnt know why. Luckily I have never added oil to my tanks.

[Shane-O-Mac]

So I dont need heat now just fuel and air and some compressing? In a diesel it is the Heat of the compressed air that lights the fuel. The compression is 14:1 or higher. Lower the compression and what happens?

How come a Mag valve gets warm after rapid fire? How come the fill nipple is Hot after a slam fill? You can add all the oil ya want if you compress it Sloooow enough it wont flash.
You need heat, spark or flame no matter how ya slice it. How come my tank pressure drops off after a slam fill?

Hey smarty pants, why so many questions???.............

Let me make a small correction to my previous post, you do need some heat for the action to occur, but not much, its the compressing thats making it become highley combustable. If you dont compress the air fuel mixture it will not combust as easily by spark, or heated air. If you lower the compression on a diesel, it wont run very well, as it doesnt have a spark system like a gas engine. Diesels start the combustion process by detonation, which uses residual heat from the piston face to ignite, not hot air IIRC. Injecting the fuel air mixture into a motor has a cooling effect of the air in the cylinder, until its compressed. But it has to be compressed to much higher pressures than gas engines to make the mixture MORE combustable.

Do you really want answers to the other questions you posted? I believe you know them...

Shane-O

[Lohman446]

Fuel and heat - the amount of heat can be overcome by compression. Theres heat at anything over absolute zero. That being said, you do not get as much heat when slow filling and may never be in danger of touching the flash point of air compressed to 4500PSI.

[don miguel]

Just a question is "flash filling" when they fill the tank quickly and not slowly, waiting for it to cool down?

[Lohman446]

Just a question is "flash filling" when they fill the tank quickly and not slowly, waiting for it to cool down?

Yes. Have your tank filled by a diveshop once and watch them do it, if they allow anyone back by where they fill the tanks. Expect to see an enclosure and a long fill - five minutes or so

[dark wolf 0982]

Thank you dark wolf

I wouldnt have seen this had it not been posted. I have seen warnings before about oil in HPA bottles but I didnt know why. Luckily I have never added oil to my tanks.

ur welcome, if i didnt post this probly somebody wouldve died i bet

[Lohman446]

ur welcome, if i didnt post this probly somebody wouldve died i bet

Little conceited aren't we?

[hitech]

With regards to heat, something to remember is that you do not necessarily need an increase in heat to ignite the oil/air mixture. If the compression loweres the flash point to the temprature of the mixture, boom...

[SCpoloRicker]

ur welcome, if i didnt post this probly somebody wouldve died i bet

Must... resist... temptation...



Curses!

/I know, but geez...

[Tunaman]

I stickied the thread. The advise is good. Lay off the newbies.

[dark wolf 0982]

sick thanks a lot

[Lohman446]

I stickied the thread. The advise is good. Lay off the newbies.

If I get a vote, and I don't, the other thread had the same warnings, and far better and more technical discussion of the issue.

[don miguel]

Great thread DarkWolf.