Answer
Sep 18, 2024 - 08:10 AM
Flame-Resistant (FR) clothing is categorized into four Hazard Risk Categories (HRC) or levels, ranging from HRC 1 to HRC 4. HRC 1 provides the least protection, typically with a minimum Arc Thermal Performance Value (ATPV) of 4 cal/cm², while HRC 4 offers the highest protection, requiring a minimum ATPV of 40 cal/cm². These levels help ensure that workers are equipped with appropriate protection based on the potential thermal hazards they may encounter.
