نسیم صبح فردا

What is sulfur hexafluoride?

  • Sulfur hexafluoride is a colorless, odorless, non-toxic, non-flammable gas that has electrical insulation properties and acts as an insulator in electrical equipment.
  • SF6(Sulfur hexafluoride) At atmospheric pressure 1, can deform directly from the solid phase to the gaseous phase.
  • SF6 One of the most stable chemical compounds in the presence of many substances، It dissolves very little in water and oil and does not change pH.

Available grades:

%99.999-% 99.99 – %99.9


Tanks and maintenance:

  • SF6 can be charged and carried in cylinders and pressure vessels with working pressure more than 68 times.
  • The maximum charge weight of the cylinder is %120 of the weight of the cylinder water intake.

Compatible and incompatible materials:

  • SF6 In contrast with all metals is non-corrosive.
  • In the vicinity of the electrical discharge may decompose somewhat.
  • Some compounds resulting from the breakdown of SF6 molecules? , They Might be corrosive.
  • Corrosion caused by the breakdown of SF6 molecules may be due to the presence of moisture or high temperatures.
  • SF6 Decomposes very little in the presence of some special metals, This effect occurs in the presence of silicon and carbon steels.
  • Decomposition at high temperatures does not occur in the presence of aluminum, copper, brass, and silver.
  • Most washers used in SF6 systems Made of Teflon, neoprene, and natural latex
Molecular Weight 146.05
steam pressure 2156 K. Pa @ 21.1 0C
Gas density 6.17 Kg/m3 @ 20 0C and 1 atm
Latent heat of vaporization at temperature 200C  63.1 KJ/Kg
Special heat capacity CP=0.6790 KJ/Kg.0C

CV=0.6190 KJ/Kg.0C

CP/CV=1.097

Critical temperature 45.560C
Critical pressure 3753 KPa(a)
Solubility in water 0.001 vol.(gas)/Vol.(Water) at 25.0 0C and 1 atm
Explosion / ignition range in air  Non-Flammable Gas

Material Compatibility of SULPHUR HEXAFLUORIDE

 

METALS PLASTICS ELASTOMERS

Brass

CARBON STEEL

StainLess Steel

Alumium

Zinc

CoPPER

Monel

Kel-F

Teflon

Tefzel

Kynar

PVC

Polycarbonate

Viton® Buna-N Neoprene Polyurethane

Updating

Kalrez

GAS Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating Updating

 

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

Dangerous Products classification:

Dangerous Products Transport Information:

 

IATA IMDG DOT
UN 1080
UN 1080 UN 1080 UN NUMBER
SULPHUR HEXAFLUORIDE SULPHUR HEXAFLUORIDE SULPHUR HEXAFLUORIDE UN SHIPPING NAME
2.2 2.2 2.2 TRANSPORT HAZARD CLASS
NO NO NO ENVIRONMENTAL HAZARD
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