Friends,
It's great to see that so many CH'ers get such dramatic and effective relief with O2. It seems, though, that there is very little posted regarding some important safety considerations when handling O2. We've touched on the "No Smoking" rule on occasion, but did you know that many substances, particularly certain oils and greases, will spontaneously erupt into fire or even an explosion if they come into contact with pure o2?
I work in the chemical industry, and this week we received the following Safety bulletin - WARNING! Graphic Image of Burn Injury - Viewer discretion advised!:
"SAFETY BULLETIN 1
COMPRESSED GAS SAFETY
Issued 09.02.2009 1
The following incident involved a welder who was adjusting the pressure on
an oxygen regulator.
The welder had oil on his hand and there was an oxygen leak from the hose
clamp.
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General Precautions
Oxygen under pressure and hydrocarbons (oil and grease) can react
violently, resulting in explosions, fire and injury to personnel and damage to
property.
Never allow oil or grease to come into contact with oxygen under pressure.
SAFETY BULLETIN 1
COMPRESSED GAS SAFETY
Issued 09.02.2009 2
Even a small amount of hydrocarbon can be hazardous in the presence of
high oxygen concentrations. In fact, any organic matter in contact with oxygen
under pressure could have a violent reaction.
Installation Precautions
DO Maintain the pressure element assembly and connection free from
dirt and any grease or grime.
DO Follow the manufacturer's instruction manual for the correct
pressure ranges to be used and for proper care and storage.
DO Use the proper size wrench to secure the gauge to the regulator.
DO Use only the thread sealant recommended by the manufacturer.
DO Leak test the gas outlet connection using soap solution prior to
use.
DO NOT Touch oxygen regulators or cylinder heads with hands or gloves
that are contaminated with oil, grease, grime or any organic
material. An explosion could result.
DO NOT Install a low pressure gauge into the high pressure port on a
regulator. Always double check.
DO NOT Use gauges designed for a specific gas for a different gas, e.g.
never use an oxygen gauge for acetylene.
DO NOT Exchange gauges from one regulator to another.
DO NOT Remove the restrictor installed in the gauge connection. The
restrictor limits gas flow and aids in limiting temperature rise due
to adiabatic compression.
DO NOT Use or handle gas regulators unless you are authorised and
qualified to do so.
Operating Precautions
Gauges can fail during operation and the energy contained in the
compressed gases can produce violent effects should the pressure element
assembly rupture.
DO Always apply cylinder pressure slowly. The gas may heat up due
to compression and ignite. This is called adiabatic compression.
DO Stand with the cylinder between you and the regulator when
turning on the gas cylinder. This will reduce the possibility of injury
from flying parts should the pressure element assembly rupture.
DO Use good judgement and common sense. Know the hazards of
the materials you work with.
DO NOT Use clamps or substitute materials that are not approved by the
regulator manufacturer."
Here's a link that's a "Must read" for O2 users, too:
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Please note, I am not suggesting that anyone give up their O2, that it doesn't work, or that you shouldn't use it. Just know what you're dealing with, and PLEASE be careful with it!
Very best regards,
Jim