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How to Select Your Fire Resistant Clothing
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- Time of issue:2013-10-28
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How to Select Your Fire Resistant Clothing
Conduct an assessment of the job that requires arc flash or fire resistant clothing.
An easy way to determine the risk category for a particular task is to compare your
task at hand to the list of common jobs provided in the NFPA 70E standard’s table
130.7 (c)(9).
Evaluate the difference and determine whether your job presents more or less hazard
than what you found on the table and determine your HRC (Hazard/Risk Category) from
zero to 4. Make sure that the fire resistant garments you select are rated for equal
or higher calorie rating than what is present in your job. Evaluate the Arc Rating
of your garments. Arc Rating is measured in cal per centimeter squared, and is the
amount of incident energy that the garments can be exposed to and cause the onset of
2nd degree burn 50 percent of time. Keep in mind that you can layer flame resistant clothing to achieve a higher Arc Rating.
Upon completing your hazard evaluation, look at the material options that fit your HRC or Arc Rating requirements.
Different materials possess unique characteristics that make them ideal for various applications.
The differences in fire resistant fabrics include the weight and flexibility (comfort),
cost, lifetime, appearance, and, arc rating, and additional functions, such as chemical
resistance, that might be beneficial for certain applications.
Please view our fire resistant fabric guideline for various information comparing qualities
of different FR fabrics including Nomex IIIA, Cotton, CPX of Nomex, Nylon/cotton,
Polyester/cotton, Indura, Indura Ultra Soft.
Take a look at the various qualities of these materials to determine what fabric would be
the best fit for your application.
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