To Burn or Not to Burn - High Oxygen Mixtures

Discussion in 'Dive Equipment Editorials' started by Curt Bowen, Jan 15, 2017.

  1. Curt Bowen

    Curt Bowen Key Holder Advanced Diver Magazine / Forum Staff Member

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    Within the diving industry, systems with oxygen concentrations
    greater than 41% are treated as 100% oxygen regarding cleaning
    and oxygen service. Systems with 21% to 26% oxygen require no
    special cleaning. Between 40% and 25%, opinions and procedures
    vary widely. Most know that fires occur in 100% oxygen systems,
    but less known are fires in 46% oxygen systems, such as NASA’s
    Neutral Buoyancy Laboratory (NBL). So a big question centers
    around the 25% to 40% oxygen concentrations and potential
    combustion risk. Many materials that are not flammable in air are


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