DID YOU KNOW?
As early as the 2nd century, Greek experiments showed that fire burned more intensely in purified air. [3] Today, we know this “purified air” as oxygen — and too much of it in the wrong place can turn a safe space into an explosion hazard.
KNOW THE RISK
- Oxygen-enriched atmospheres pose a significant fire and explosion risk. These environments are commonly found in medical, industrial, and confined space settings. [1]
- The normal atmosphere contains 20.8% to 21% oxygen. Anything above that threshold increases the flammability of materials — even those not normally considered combustible. [1]
- Oxygen enrichment can result from leaking cylinders, improper ventilation, or chemical reactions. Even rusting steel wool can produce unexpected oxygen levels. [1]
MITIGATE THE RISK
1. Always Test Confined Spaces
- Use a calibrated gas monitor to test for oxygen levels before entering any confined or high-risk space. Never assume an area is safe based on appearance. [1]
2. Label Oxygen-Enriched Areas Clearly
- Post clear signage and restrict access where elevated oxygen levels are detected. Alert all personnel to increased fire risk. [1]
3. Remove Flammable Materials
- Even grease, oil, and clothing can ignite spontaneously in an oxygen-enriched environment. Keep these materials out of affected zones. [2]
OXYGEN SAFETY REMINDER
Oxygen is essential for life — but too much of it in a confined space can create deadly hazards. Know your environment, test before entry, and control your ignition sources. In oxygen-enriched zones, extra caution is not optional — it’s lifesaving.