Ordinary high purity industrial gas

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Helium


 
Description
Helium is the lightest element after hydrogen, and represents in nature in limited quantities (only 5 ppm of the atmosphere). It is a nonflammable and nontoxic gas. Helium is inert to chemical reactions and radiations. Out of all inert gases, helium has the highest thermal conductivity. The gas is only slightly soluble in water. Liquid helium is the coldest known substance with boiling point of -269 degree C.



Applications
1) Used for welding and as a lifting gas in balloons.
2) Used as a coolant in nuclear reactors and for growing germanium and silicon crystals for transistors, as well as the production of some metals such as titanium and zirconium.
3) Used for filling cold-water fluorescent lamps as well as laser and fiber optic production.
4) Liquid helium is used for cooling superconductive megnets.



PHYSICAL AND CHEMICAL PROPERTIES
Appearance : Compressed gas. Colorless gas Odor : No odor warning properties. Odor : Mixture contains one or more component(s) which have the following odor: No odor warning properties. Odor threshold : No data available. pH : Not applicable. Melting point/range : No data available. Boiling point/range : -452 °F (-268.9 °C) Flash point : Not applicable. Evaporation rate : Not applicable. Upper/lower explosion/flammability limit : No data available. Vapor pressure : Not applicable. Water solubility : 0.0015 g/l Relative vapor density : 0.138 (air = 1) Lighter or similar to air. Relative density : No data available. Partition coefficient (noctanol/water) : Not applicable. Auto-ignition temperature : No data available. Decomposition temperature : No data available. Viscosity : Not applicable. Molecular Weight : 4 g/mol Helium Density : 0.012 lb/ft3 (0.0002 g/cm3) at 70 °F (21 °C) Note: (as vapor) Specific Volume : 96.68 ft3/lb (6.0349 m3/kg) at 70 °F (21 °C) Hazards & Transportation.



Hazard Statements
H280: Contains gas under pressure; may explode if heated. Helium May displace oxygen and cause rapid suffocation.
Major Hazard: high temperature and suffocation
Toxicity: nontoxic
Fire Potential: nonflammable
Odour: none
DOTE Name: Helium
DOT Label: nonflammable gas
Identification No.: UN-1046 (compressed gas)
                                UN-1963 (refrigerated liquid)
Hazard Class/Division: 2.2
Cylinder data
Color: black
Valve: CGA580
Water capacity: 40 liters (standard)
Contents: 6m³
Filling pressure at 21℃: 150bar
Gas specifications
Industrial grade: 99.999%

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