What is the maximum percentage of a mixture in which non-flammable gases are not ignitable at 14.7 PSIA?

The maximum percentage for a mixture in which non-flammable gases are categorized as not ignitable at 14.7 PSIA is 13 percent. This figure is significant in safety and compliance contexts, particularly concerning the handling and storage of fuel and gases.

In a mixture containing both flammable and non-flammable gases, the threshold establishes levels at which the risk of ignition is minimized. The 13 percent concentration represents the upper limit at which the mixture is still considered safe from ignition risks under standard atmospheric pressure conditions. Any mixture exceeding this percentage could potentially have flammable properties, even if it primarily consists of non-flammable gases.

Understanding this limit is crucial for professionals involved in handling fuel-oil systems, as it helps in designing safe systems that prevent fire hazards. By adhering to these guidelines, individuals and organizations can ensure compliance with safety regulations and mitigate the risks associated with flammable and non-flammable gas mixtures.