OK, you guys are making me nervous with the descriptions of deflagration. I've
got a cart with an oxygen and an acetylene cylinder, no hoses connected right
now. Is it safe to store this as is in a garden shed? Do I need to separate the
cylinders or is it OK to leave them together in the cart?
They're OK together.
The one caveat that I got from the welding supply guy when I started
on a cross-continent move was that the acetylene bottle must be
shipped upright. The moving company naturally wouldn't ship the thing
so it made the journey inside a car that was being towed on a trailer.
It probably got quite warm in there but we placed the cylinder (a
half-height one) upright on the floorboards and strapped it to the
back of the passenger seat.
I suspect that keeping them upright during storage is the thing to do
too. I've never seen a welding supply outfit store its bottles
Actually your better off (code wise) to leave your regulators and hoses
attached. When you have a cart that is "in service" You can have both gasses
together on a cart as you describe. If your gasses are "in storage" they
have to separated by 20 feet between them. And double chained to the wall.
(one chain just isn't good enough anymore)
As for your own personal protection goes. Just make sure your tank valves do
not leak. You should always close your tank valves when not in service.
Don't rely on the regulator to not fail, they do.
Unlike Propane tanks, Acetylene and Oxygen tanks do not have pop valves that
can release pressure if the tanks are over filled or heated.
You should ventilate your shed too. Put a vent near the floor. Propane,
Acetylene, and Natural gas are heavier than air. They will collect at ground
SC Glass Tech
Scam Diego, Comi-fornia
Do I need to separate the
It's fine to leave them together.
Keep the valves off, ventilation in ANY small shed is good idea.
I don't really like transporting acetylene cylinders in a horizontal
position. Stand them upright for a couple of hours before using them. If
you do light your torch and a purple flame comes from the tip, that's
acetone. Not good. Anyway, transporting ANY gas cylinders (not just
acetylene) in an enclosed area is a really bad idea. If you are moving
any long distance, it's best to sell your cylinder and buy another when
arriving. Most companies I deal with, (AIRGAS, PURITY,) don't have a
problem with crediting cylinders.
Hi, I just covered this in a welding course at the local community college,
If storing without hoses and regulators the bottles should be seperated by
sheet of steel approx 3/6" thick, kind of like a bulkhead in a boat.
Storage area should be cool, dry and in an oil free area. Pure oxygen will
cause oil to combust without a source of heat. It creates it own. Bottles
should have all fittings removed and protective caps placed on them if
storing for any length of time. The should also be chained or otherwise
secured in an upright position. Acetylene cylinders should NEVER NEVER
placed on their side, always upright.
Hope this helps
I believe so. Store upright and make sure shed is vented at top and
bottom. Acetylene gas rises, so if you have openings in the top of your
shed (ridge cap), the gas will just leak away and not build up inside
Not to worry Scott, since hundreds of thousands of users keep them in
their shops for use, without incident. I'm currently keeping mine in
the garage, but in a previous home kept them in my basement shop.
Just remember to ALWAYS turn off the tank valves after use. You never,
ever leave the hose lines pressurized except when in use.
If have tanks in relatively good condition (not all corroded, slimey,
ancient, etc.) and store them in controlled temperature conditions
(say, under 120-degrees), you WILL NOT have any problem.
After talking to the fire marshal here at work (I was worried about
housing code issues for them) I decided to put my OA rig in storage
out in my garage. My worries about leaks, and also the effect of
having the cylinders in the basement in the event of a house
fire were similar to the thoughts of the fire marshal. He said
he would not store them in his house, legal or not.
Relative densities of various gases:
16 Methane C1H4 (natural gas)
26 Acetylene C2H2
28.74 Air N2 O2 Ar (78/21/1)
44 Propane C3H8
58 Butane C4H10
I wouldn't like to depend on gravity to vent
acetylene from any enclosed space. Methane
or natural gas is a fair bit lighter than air.
"Peter W. Meek"