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Nitrogen

Nitrogen is a colorless, odorless, non-flammable gas which constitutes over 78.0% of atmospheric air.

Commercial nitrogen is the product of air separation, and is used for inerting electrical systems and chemical manufacturing, and for food processing and packaging.

Due to its reactivity under the influence of high heat and chemicals, nitrogen is not used as a shielding gas in the welding industry.  It is, however used as a purging and refrigerant gas, and has powered many impact wrenches in the motorsports world.

Nitrogen DOT Name Nitrogen Molecular Weight 28.013
Major Hazards High Pressure, Suffocation DOT Label Non-flammable gas Specific Volume 13.8 ft/lb (12.00 m3/kg)
Fire Potential Non-flammable DOT Class 2.2 CAS No. 7727-37-9
TLV-TWA None Established DOT No. UN1066 Valve Outlet CGA 580
Packaging Cylinder Size Weight Pressure (PSI @ 70F) Dimensions (Height x Diameter)
20 cu. ft. 14 2015 18" x 5 1/2"
60 cu. ft. 40 2015 22" x 7"
80 cu. ft. 43 2015 36" x 7"
115 cu. ft 65 2015 48" x 7"
277 cu. ft. 140 2265 54" x 9"
301 cu. ft. 165 2400 60" x 10"