O2 brand ombord på en dykbåt!
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Såg en insändare från Phi Lee på "The Deco Stop". Summering:
En O2 flaska på en RB (ECCR) ombord på en dykbåt påbörjade en brand, det hela slutade med att alla fick lämna dykbåten hals över huvudet och att hela båten brann. En tankeställare till oss alla på forumet som handskas med O2......
Insändaren med text och bild på båten som brinner finns på "The Deco Stop" under forumet rebreathers, man måste dock vara medlem för att få access till forumet. Länk till sidan: http://thedecostop.com
Saxat ur "The Deco Stop":
Publiceringsdatum: 06-03-2005
"Most people who subscribe to NWRB list already know this story that happened 2 days ago, but I thought that I might as well post it here to remind everyone not to be complacent with O2.
We were diving on Friday (as usual) in anticipating for diving the U-533 again in 2 weeks.
The first team (all on OC) has just came back from the dive, and was being helped back on the boat. While the last diver of the team was about to get on board, the second team (all on CC) was getting ready to gear up for the dive.
I was putting on my unit when I heard a strong gas swooshing sound like a BIG blow torch going (no explosion though). Looking up I saw huge yellow flames came from the bottom of one of the 2 ECCR units, and people were flying over the rail in the water and I was the last man on-board since they were all closer to the unit and knew what was happening before me.
Not being a hero, I dove over the rail without thinking while mentally kicking myself for being so slow.
By the time my head popped out of the water, it was only about ~5 seconds from the moment I saw the flames. And 1/3 of the 27-ft diving boat was already in flame.
Everyone knew that there were O2 and Nitrox stages remained on-board so we swam as hard as we could away from the boat (all without fins) since we had no idea what will happen next.
I guess about 3 minutes later, the tank o-rings on the stages were melted one by one and each acted like a giant torch shooting flames up over the rail clearly visible from the water. Just a few seconds after flaring out, each stages "exploded" shooting debris at least 50m/150ft in the air and landed over us.
Eventually all of the stages were destroyed and we were expecting the boat diesel to explode next, but it never happen. By this time, the boat was fully inflamed. See picture attached...
We were picked up by a recreational fishing boat and brought back to port. The Coast Guard came out to put out the fire and towed the remain of the boat back to port. It was burnt to the water line and everything on board was destroyed (except for my keys which were melted into the fiberglass floor, and still useable now).
I got off light losing only my 2 stages, fins, mask, hood, dive bag, sunglasses, wallet and phone (US$3,000). The guy who owned the unit that went up in flame lost ~US$15,000 since his digital video system, GPS, Helium analyzer, etc were gone.
I have started an analytical discussion about the accident since the O2 tank was turned on at least a few minutes before the flames appear. And if it came just 1 minute later after the diver had don the unit, it could have been much worse.
Here was the timeline event:
- Diver turned on O2 tank
- Turned on RB electronic
- Solenoid activated and got unit to surface set-point (0.7)
- Diver was picking unit up to don when fire started (~3 mins after turned on tank)
The fact that there was a delayed time frame is the part that scare me the most since no one would have any chance of turning the tank valve off as it wouldn't be a human instinct to drop the unit, reach down into the flame and turn the valve off. If the flame started while the tank was being turned on, then it would have been easier.
Tank was O2-cleaned ~1 month before. Reg was 3-dive old. Unit was 4-year-old.
We all know about adiabatic compression as a possible source of problem, but no one was able to pin down on any strong cause in this incident. The suggestions were:
- debris in the valve
- old hose
But at the end, no one will know for sure what happened."
«TILLBAKA
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