Not All Gases Ignite the Same Way.

Hydrogen ignites far more easily than propane. That difference is what gas groups and temperature classes capture — and why the full certification code matters.

Gas groups rank ignition sensitivity.

IIC-rated equipment meets the most demanding Group II requirements and also satisfies IIA and IIB applications, subject to the complete certification and site specification.

Temperature classes limit surface heat.

A marking is not a general badge of safety. It describes exactly which protection concept, gas group and surface-temperature limit the certified equipment provides.