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Slide 61


    Title: Breathing Air Quality and Use
    Type: Text Slide

    • Compressed breathing air must meet at least the requirements for Type 1 - Grade D breathing air described in ANSI/CGA G-7.1-1989:
      • Oxygen content (v/v) of 19.5 - 23.5%
      • Hydrocarbon (condensed) content of 5 milligrams per cubic meter (mg/m3) of air or less
      • CO content of 10 parts per million (ppm) or less
      • CO2 content of 1,000 ppm or less
      • Lack of noticeable odor
    • Compressors supplying breathing air to respirators must be equipped with suitable in-line air-purifying sorbent beds and filters that are maintained and replaced or refurbished per manufacturer’s instructions