High pressure hose blowing, can it happen UW?

[Mike Veitch]

You ever seen a hp fill whip blow? Damn thing goes off like a cat o'nine tails. My buddy had whip marks all over his body as he was unfortunately standing near by when it blew. Even got him on the old family jewels...nasty! :11:

 

[WaterDawg]

Yeah but a whip is much different from a hose.

 

[scubamoo]

NOAA Dive Center experimented with this and found that the LP hose drained a tank much quicker than a HP hose -- confirming what most of you have said.

Just unscrew the LP and HP hoses from your first stage and compare the apertures -- the HP is small, the LP is large!

 

[Keysdrifter454]

If you have a high-pressure hose blow underwater, it will sound like a billion screaming teapots. And, if that hose gets pushed up against your flesh, it can (will) force air under the skin, possibly causing death. A LP hose can do this too.

That's a very unique perspective, Doc.

 

[padiscubapro]

Now, if your hp hose was to unscrew from your first stage, it would be very cool. And empty your tank in short order.

not on most regs..
unscrew you HP hose.. this port it SEVERELY restricted.. The LP hose will dump a tank much much faster

 

[padiscubapro]

what he said about pressure injections is correct COULD give a embolism but the hose going off pop where ever it goes off will cause a problem for most divers, in 20 yrs I have seen 2 hoses blow and I had one LP whip me good enough to make me bleed through a tee shirt, so its possible but not likely

Lp hose hing are much more common and dangerous.. On a recent trip, a diver ruptured an ear drum because the lp hose blew ..

 

[padiscubapro]

You ever seen a hp fill whip blow? Damn thing goes off like a cat o'nine tails. My buddy had whip marks all over his body as he was unfortunately standing near by when it blew. Even got him on the old family jewels...nasty! :11:

Fill station whips are very different hoses, They are designed to allow gas to flow with as little restriction as possible.. They are very large bore hoses and fittings at both ends are also as large as possible.

 

[jbisjim]

In my first few years of diving, and not owning my own gear.I was in Cozumel and I had the Hp hose that went into the gage console burts just in side the console. Lots o bubbles is right, but it was at the begining of the dive and we were at 60 feet. When i got to the surface it was all gone.

Lesson learned: I went out and got my own gear.

 

[DennisW]

I've seen one HP hose, actually the gauge blew, go on a dive in the Bahamas once. I believe we were at about 60 ft. It was loud, very loud, and bubbles were everywhere. The guy made a normal ascent. The LP hose will absolutely drain a tank much faster than the HP hose.

 

[novadiver]

HP hoses have fairly small openings, and a busted one doesn't leak all that much. A blown LP hose will empty your tank before a blown HP hose.

Think about it... 3000 psi spread over an area only .01 square inches is only 30 pounds.

Maybe I'm just slow but if it only transfers 30# of pressure, why does the pressure guage read 3000#. ?

In the old days, training manuals told you to turn the pressure guage around when turn on the tank so if the glass failed it wouldn't cause injury. I wonder why if it is only 30# of pressure ?