What does HRC 3 mean?
What does HRC 3 mean?
Hazard Risk Category
Garments compliant to HRC (Hazard Risk Category) 3, as defined by NFPA 70E, 2012 edition, have an arc rating that is greater than or equal to 25 cal/cm², but are less than 40 cal/cm². Finding flame resistant clothing compliant to HRC 3 may be more difficult than Levels 2 and 4.
What is HRC level?
NFPA 70E is a safety standard that denotes Hazard Risk Categories (HRC) based upon an array of occupational duties. An HRC level is determined by the minimum amount of calories per square centimeter (ATPV or Cal/cm2).
What does HRC 2 mean?
Garments compliant to HRC (Hazard Risk Category) 2, as defined by NFPA 70E, 2012 edition, have an arc rating that is greater than or equal to 8 cal/cm², but is less than 25 cal/cm². HRC 2 may also be called Level 2.
What does HRC mean in fr clothing?
(Hazard/Risk Category):
HRC (Hazard/Risk Category): The five Hazard/Risk categories are specified by the chart listed in NFPA® 70E. The chart, based on specific job tasks, ranges from HRC 1 (which is low risk and allows for 100% treated cotton), up to HRC 4 (which is high risk and requires FR clothing with a minimum arc rating of 40).
What is a 40 cal suit?
When you see an item that is marketed as a 40 cal arc flash suit, the number actually means that the suit is rated to protect against arc flashes with an incident heat energy level of up to 40 cal/cm2. A 40 cal/cm2 arc flash suit, therefore, would be designed to absorb heat energy 40 times more intense.
What’s the difference between HRC 0 and 4?
The chart, based on specific job tasks, ranges from HRC 0 (which is low risk and allows for 100% untreated cotton), up to HRC 4 (which is high risk and requires FR clothing with a minimum arc rating of 40). The HRC is used to determine the necessary arc rating of a garment worn during a given job task.
How is the HRC level of clothing determined?
HRC level is determined by the minimum amount of calories per square centimeter ( ATPV or Cal/cm 2) a treated garment must pass through with a 50% probability of a 2nd or 3rd degree burn occurring, thus the protective level of the treated clothing. The higher the ATPV, the higher the HRC level attained, the greater the protection.
How to calculate the minimum HRC level for Fr?
The following HRC level chart / table /matrix shows minimum ATPV value that must be calculated to acquire the next level of HRC and typical FR apparel used to accomplish the ATPV/HRC calculation.
Which is the best HRC 2 fr work shirt?
A 100% cotton flame resistant button down work shirt offers great protection and style all day long! EXCEL FR ComforTouch 6oz. FR Uniform Shirt (SLU8) This CAT 2 flame resistant work shirt is comfortable and looks good! This comfortable flame resistant work shirt is a great choice for everyday wear.