What is one of the primary risks when performing gas-free tests?

When performing gas-free tests, one of the primary risks is the potential for explosion from flammable gases. Gas-free testing is typically done to ensure that a confined space, like a tank, is safe for personnel to enter or work in. This process involves measuring the concentration of flammable gases to determine if they are at a safe level. If the concentration of these flammable gases is too high, there exists a significant risk of ignition, which can lead to explosions or fire incidents.

Flammable gases can accumulate in confined spaces during previous cargo operations or from residual materials, and identifying this risk is crucial for maintaining safety standards. Therefore, monitoring for flammable gases helps in preventing potentially catastrophic events, ensuring that appropriate safety measures and protocols are followed before any work begins in such environments.