FMDs, or Flame Mitigation Devices, are specialized safety components required in all portable fuel containers sold in the United States. Their primary function is to prevent an external flame from entering the container and igniting the fuel vapors inside, which could otherwise cause a flashback explosion.

The requirement for FMDs comes from the Consumer Product Safety Commission (CPSC) Final Rule (16 CFR Part 1461), which took effect in July 2023. This rule mandates that all gas cans and similar portable fuel containers must be equipped with an FMD that passes standardized safety testing.

Key technical points:

• Design: FMDs are typically a mesh or flame arrestor integrated into the spout or opening of the container.
• Function: They dissipate heat and quench the flame front, preventing ignition from traveling into the container.
• Testing Standards: The CPSC rule references ASTM standards for flame arrestor performance, ensuring all devices meet the same minimum level of protection.

In short, FMDs are federally mandated safety features designed to significantly reduce the risk of fire hazards, and every compliant gas can must include them to be legally sold in the U.S.

Thank you

Thank you

Thank you