non-incendive; non-firing
Technical term used in safety engineering and hazardous area classification to describe equipment or materials that will not ignite a flammable atmosphere under normal operating conditions.
This device has a non-incendive design.
It is necessary to select non-incendive materials.
防爆 (explosion-proof) is a broader term for preventing explosions, while 非発火性 specifically means the equipment itself will not produce sparks or heat that could cause ignition.
Compound of 非 (non-), 発火 (ignition), and 性 (property). A modern technical term formed from Sino-Japanese elements.