5% of methane in air equals what percentage of LEL?

To determine what percentage of the Lower Explosive Limit (LEL) is represented by 5% of methane in air, it's important to understand the concept of LEL. The LEL refers to the minimum concentration of a gas in air that can ignite in the presence of an ignition source. For methane, the LEL is typically around 5% by volume in air.

When you have a concentration of 5% methane, that concentration is exactly at the LEL for methane. Therefore, 5% of methane in air corresponds to 100% of its LEL. This means that the methane concentration is at the critical level where it can potentially ignite, making it the threshold value.

Consequently, stating that 5% of methane in air equals 100% of the LEL is accurate and reflects the relationship between methane concentration and its explosive properties. This critical information is essential for fire safety and hazard management practices, particularly in environments where flammable gases may be present.