Oxygen

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General Characteristics Health Hazards Material Recommendations

A colorless, nonflammable and odorless gas. Sustains combustion of many materials which cannot burn in air.

Increases combustion rate when compared to air

Copper, brass, nickel alloys, stell and stainless steel. All equipment must be degreased.
TLV-TWA Flammable Limits DOT Class / Label
None Established Strong oxidizer 2.2 / Nonflammable
Molecular Weight Specific Gravity Specific Volume
32.0 1.105 @ 77 F 12.1 cu.ft./lb @ 70 F
CGA Valve Outlet CAS Registry No. UN Number
540 7782-44-7 1072
National Stock Number (NSN) Applicable to Oxygen
CFC Specifications Chart
MIL Spec / Fed Specs
MSDS for Oxygen


Grade
Part #
Purity Minimum Cylinder
Size
Volume
SCF
Pressure
@ 70 F
Comments
Research
432000
99.999% Min. 049
044
002
337
225
4
2640
2000
1800

None

Ultra High
404200
Electrolytic
99.99% Min. 049
044
LBS
337
225
2
2640
2000
1800

None

Zero
404300
99.98%
<0.5 ppm THC
049
044
LBS
337
225
2
2640
2000
1800

None

Aviator
423000
99.9%
<3 ppm water
049
044
337
225
2640
2000

None

Extra Dry
404400
99.6% 049
044
LBS
337
225
2
2640
2000
1800

None

Industrial / Technical 99.9% 049
044
LBS
336
224
2
2640
2000
1800

None


Uses: Oxygen a vital element of life, here you will discover Oxygen in some of the purist forms for Breathing, electronic applications and advanced research purity.

Oxygen includes 21% of the atmosphere at all altitudes. The remaining atmosphere consists of 78% nitrogen and 1% traces of other gases. Oxygen under normal conditions is an odorless, colorless, tasteless, non-combustible gas. It is the most important single element on earth.

At each breath we fill our lungs with air. Millions of tiny air sacs (known as "alveoli") in our lungs inflate like tiny balloons. In the minutely thin walls enclosing each sac are microscopic capillaries though which blood is constantly transported, from the lungs to every cell in the body. The oxygen extracted from the air in the lungs is carried by the blood to every part of the body. Because the body has no way to store oxygen over a period of a long time, it leads a breath-to-breath existence.

The human body must have oxygen to convert fuel (the carbohydrates, fats, and proteins in our diet) into heat, energy, and life. The conversion of body fuels into life is similar to the process of combustion; fuel and oxygen is consumed, while heat and energy is generated. This process is known as "metabolism".

The rate of metabolism, which determines the need for and consumption of oxygen, depends on the degree of physical activity or mental stress of the individual. Not all people require the same amount of oxygen. A man walking at a brisk pace will consume about four times as much oxygen as he will while sitting quietly. Under severe exertion or stress, he could possibly be consuming eight times as much oxygen as resting.

There are four kinds of oxygen that are merchandised or sold to users; Aviation, Medical, Welding and Research. There is a ongoing controversy if there is any difference between the different types. Oxygen gas is produced from the boiling off of liquid oxygen. It would appear that the oxygen is therefor the same. Where we obtain oxygen, all the different types of oxygen are supplied from the same manifold system. Then someone says that medical oxygen has more moisture in it. That is partly true. The oxygen going to a hospital bed is plain oxygen that comes from liquid oxygen. At the bed location, there is a unit on the wall that adds moisture. At this moment we now have medical oxygen. If the oxygen is in a pressure vessel or in a manifold system (like inside a hospital) then it is regular oxygen. The cost of medical or welding oxygen is normally much less than the oxygen you get at an airport.

Also of interest, we have been told by the suppliers of welding oxygen, the purity level required for welding and cutting purposes is more critical than for breathing.

The bottom line about the different types of oxygen is in the insurance liability of the oxygen supplier. The gas is the same but the insurance liability is different.

Last Updated: 98 AUG 10