نسیم صبح فردا

What is oxygen?

  • Oxygen is a colorless, odorless, tasteless, gaseous element that supports human life, and It’s combustible, It makes 1/5 of the atmosphere.
  • (%20.95 by volume of the atmosphere and %32.5 by weight of atmosphere) Oxygen at low temperature(0 -184 C), clear, the very light blue liquid that is slightly heavier than water
  • All elements, except neutral gases, combine with oxygen and create The oxides form. Oxygen is non-flammable but greatly intensifies the combustion process

Available oxygen grades:

% 99.9999,% 99.9995,% 99.999,% 99.995,% 99.6


Tanks and maintenance:

  • Oxygen can be charged in the gas form and under pressure in cylinders as well as in trailer tubes.
  • Liquid oxygen is transported and stored in portable flasks and cryogenic tanks.

Compatible and incompatible materials:

  • Gaseous oxygen is non-corrosive and can be used in systems made of ordinary metals. At the temperature of oxygen liquefaction, carbon steels and steel alloys lose their malleability and they aren’t suitable for exposure to oxygen.
  • Metals and alloys are suitable for exposure to oxygen at liquid temperatures include: stainless steel (eg 316,304), nickel and chromium alloys, nickel, Monel 400, copper brass, bronze, and austenitic aluminum alloys.
  • Oxygen contact systems and piping must be free of any combustible materials, grease or oil.
Molecular Weight 31.9988
steam pressure 100 K. Pa @ -183.15 0C
Gas density 1.326 Kg/m3 @ 21.1 0C and 1 atm
The latent heat of evaporation at the boiling point 213 KJ/Kg
Special heat capacity CP=0.9192 KJ/Kg.0C

CV=0.6577 KJ/Kg.0C

CP/CV=1.40

Critical temperature -118.60C
Critical pressure 5043 KPa(a)
Ability to dissolve in water 0.0489 vol.(gas)/Vol.(Water) at 00C and 1 atm
Explosion / ignition range in air Non Flammable

Material Compatibility of OXYGEN

 

METALS PLASTICS ELASTOMERS

Brass

CARBON STEEL

StainLess Steel

Alumium

Zinc

CoPPER

Monel

Kel-F

Teflon

Tefzel

Kynar

PVC

Polycarbonate

Viton® Buna-N Neoprene Polyurethane

O

Kalrez

GAS S C O C S S S O O O O O C U O O O

 

S – Satisfactory for use with the intended gas
C – Conditional. May be incompatible under some circumstances or conditions Contact your Praxair representative for additional information
U – Unsatisfactory for use with the intended gas
I – Insufficient data available to determine compatibility with the intended gas
O – All nonmetalic, even those considered compatible, may be ignitable in oxygen enriched environments or in other oxidizing gases. Successful
use depends upon oxygen purity, pressure, temperature, cleanliness and elimination of ignition mechanisms. Please contact your Praxair
Representative for additional information

Classification of dangerous Products:

Dangerous Products Transport Information:

 

IATA IMDG DOT
UN 1072 UN 1072 UN 1072 UN NUMBER
Oxygen, compressed Oxygen, compressed Oxygen, compressed UN SHIPPING NAME
2.2 2.2 2.2 TRANSPORT HAZARD CLASS
NO NO NO ENVIRONMENTAL HAZARD
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