Taylor-Wharton EF-1500 - Manual (Page 4)

BT-481 REV. B
4
parts. Also, be sure all replacement parts are thoroughly "Cleaned For Oxygen Service" in accordance with Compressed
Gas Association (CGA) Pamphlet G-4.1 "Cleaning for Oxygen Service" or equivalent industrial cleaning specifications.
Observe Safety Codes When Locating Oxygen Equipment
Before locating oxygen equipment, become thoroughly familiar with National Fire Protection Association (NFPA)
Standard No. 50, "Bulk Oxygen Systems", and with all federal, state and local safety codes. The NFPA Standard covers
the general principles recommended for the installation of bulk oxygen systems on industrial and institutional consumer
premises.
Safety Precautions for Liquid Nitrogen
Nitrogen is an inert, colorless, odorless, and tasteless gas making up four-fifths of the air you breathe. Liquid nitrogen is
obtained by cooling air until it becomes a liquid and then removing the oxygen. Air is roughly one-fifth oxygen. Liquid
nitrogen is at a temperature of -320
°F (-196°C) under normal atmospheric pressure.
Extreme Cold - Cover Eyes and Exposed Skin
Accidental contact of liquid nitrogen or cold issuing gas with the skin or eyes may cause a freezing injury similar to
frostbite. Handle the liquid so that it won't splash or spill. Protect your eyes and cover the skin where the possibility of
contact with the liquid, cold pipes and equipment, or the cold gas exists. Safety goggles or a face shield should be worn
if liquid ejection or splashing can occur or cold gas can issue forcefully from equipment. Insulated gloves that can be
easily removed and long sleeves are recommended for arm protection. Trousers without cuffs should be worn outside
boots or over the shoes to shed spilled liquid.
Keep Equipment Area Well Ventilated
Although nitrogen is non-toxic and non-flammable, it can cause asphyxiation in a confined area without adequate
ventilation. Any atmosphere not containing enough oxygen for breathing can cause dizziness, unconsciousness, or even
death. Nitrogen, a colorless, odorless, and tasteless gas, cannot be detected by the human senses and will be inhaled
normally as if it were air. Without adequate ventilation, the expanding nitrogen will displace the normal air resulting in a
non-life-supporting atmosphere.
Dispose of Waste Liquid Nitrogen Safely
Dispose of waste liquid nitrogen out-of-doors where its cold temperature cannot damage floors or driveways and where it
will evaporate rapidly. An outdoor pit filled with clean sand or gravel will evaporate liquid nitrogen safely and quickly.
NOTE: Argon is an inert gas whose physical properties are very similar to those of nitrogen. For handling of liquid
argon, follow the safe practices described for the handling and use of liquid nitrogen.
Safety Precautions for Liquid Carbon Dioxide
WARNING: CARBON DIOXIDE CAN CAUSE ASPHYXIATION AND DEATH IN CONFINED, POORLY
VENTILATED AREAS.
COLD GAS CARBON DIOXIDE CAN CAUSE SEVERE FROSTBITE TO THE EYES OR SKIN. DO NOT
TOUCH FROSTED PIPES OR VALVES. IF ACCIDENTAL EXPOSURE TO THESE GASES OCCURS,
CONSULT A PHYSICIAN AT ONCE. IF A PHYSICIAN IS NOT READILY AVAILABLE, WARM THE AREAS
AFFECTED BY FROSTBITE WITH WATER THAT IS NEAR BODY TEMPERATURE.
Keep Equipment Area Well Ventilated.
Carbon dioxide affects the important acid-base balance in the body. Carbon dioxide is formed in normal functioning
within the body, but the body can tolerate increased amounts of carbon dioxide only in limited concentration. This is
recognized in OSHA standards where a Threshold Limit Value of 5,000 parts per million by volume (0.5 percent
concentration) has been adopted. For safety, concentrations above this level should not be permitted; increased
concentrations can cause bodily harm or death. Additionally, carbon dioxide can cause asphyxiation by
displacing oxygen resulting in dizziness, unconsciousness or death.