At what temperature is natural gas considered highly flammable?

Natural gas is considered highly flammable at temperatures in the range of 1000°F to 1100°F. At these temperatures, the gas can ignite readily and sustain combustion, posing significant safety hazards, particularly in environments where gas appliances and systems are used.

The principle behind this is that as the temperature rises, the molecules within natural gas become more active, making it easier for them to ignite when exposed to a spark or flame. This is especially critical in fields such as heating and energy, where understanding the flammability range is essential for safe operation and compliance with safety regulations.

In contrast, the other ranges listed do not reach the threshold at which natural gas becomes highly flammable. As temperatures fall below 1000°F, the risk of ignition decreases significantly, making it safer for handling and usage in residential and commercial applications.