Dangerous atmosphere: the air inside a tank can kill before anything else does

Most confined-space deaths are not caused by a fall or a blow. They are caused by the air. Air that looks normal and kills in silence.

A confined space is any enclosure not designed to be occupied: a tank, a pit, a silo, a large pipe. The danger is not the space itself, but what its atmosphere does to your body. And there are three ways that air turns deadly.

The three faces of a dangerous atmosphere

First, lack of oxygen: below 19.5 % your body starts to fail, and the air you breathe may have been displaced by another gas without you noticing. Second, too much of something toxic: H2S, carbon monoxide, vapors; a small concentration is enough to knock you out in a couple of breaths. Third, a flammable atmosphere: vapors that, with one spark, turn the enclosure into a bomb. Think of opening an old refrigerator: you do not see the gas that escaped, but the air inside is no longer the air outside.

Someone entering a tank with low oxygen does not feel like they are suffocating. They feel tired, sit down to rest, and never get back up.

Air is measured, not assumed

The rule is simple and not negotiable: no confined space is entered without measuring the atmosphere first, and without continuing to measure while anyone is inside. Measuring once when you open the lid is not enough: the atmosphere changes with the work, the temperature and time. Oxygen, toxic gases and explosivity, in that order, with calibrated equipment and a clear standard for when you do NOT go in.

Before you lift the next lid, ask yourself one question: do I know what is in that air, or am I assuming it? Assuming is the first step of the accident. Your people can learn to read and control that atmosphere, step by step, in EURECA.