SHIELDING GASES
Which shielding gases are reactive gases?
Which shielding gases are inert gases? • Argon - heavier than air • Helium - lighter than air
• Nitrogen • Carbon Dioxide
All are: Odorless Colorless Can displace oxygen Check confined spaces for adequate air with oxygen analyzer or use a respirator Same precautions shall apply to pits, tank bottoms, low areas, and areas near floors when heavier than air gases and vapors are present, and to tank tops, high areas and near ceilings when lighter than air gases are present.
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