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Flame Retardant clothes from a manufacturer
of ISO & NFPA certified FR fabrics

ASTM 1959

 ASTM-logoStandard Test Method for Determining the Arc Rating of Materials for Clothing

This is the test method used to calculate quantitative results for fabrics relating to how they perform in an electric arc environment. 
 
EN ISO 61482-1 panel test5.1 This test method is intended for the determination of the arc rating of a material, or a combination of materials.
5.1.1 Because of the variability of the arc exposure, different heat transmission values may be observed at individual sensors. Evaluate the results of each sensor in accordance with Section 12.

5.2 This test method maintains the specimen in a static, vertical position and does not involve movement except that resulting from the exposure.
5.3 This test method specifies a standard set of exposure conditions. Different exposure conditions may produce different results. In addition to the standard set of exposure conditions, other conditions representative of the expected hazard may be used and shall be documented in the reporting of the testing results.    
 
•The purpose of this test method is to determine how much heat a certain fabric (or system of fabrics) will block from an electric arc before the onset of second degree burns for the wearer. 
•The amount of energy blocked by the fabric is reported as Arc Thermal Performance Value (commonly abbreviated as ATPV).  The value is reported as Breakopen Threshold Energy (Ebt) if the fabric breaks open before the onset of second degree burns is reached. 
•Heat Attenuation Factor (the percentage of total heat blocked by the fabric from reaching the sensor) is also determined. 
•Test results from ASTM F1959 must be reported for all garments that meet ASTM F1506.

 

Risk Category

Clothing Description

Required ATPV of
the Garment System
(cal/cm2)

0

Non-melting, flammable materials (i.e. untreated cotton, wool, rayon or silk, or blends of these materials).

N/A

1

• Arc rated FR shirt + FR trousers or arc rated FR coverall

4

2

• Non FR undergarment
• Arc rated FR shirt + FR trousers or arc rated FR coverall.8

8

3

• Non FR undergarment
• Arc rated FR shirt + FR trousers or arc rated FR coverall
• Arc flash coverall selected so that the system garment arc rating meets the required minimum.

25

4

• Non FR undergarment
• Arc rated FR shirt + FR trousers or arc rated FR coverall
• Arc flash coverall selected so that the system garment arc rating meets the required minimum.

40

 

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INDUSTRY
FR FABRIC
FR TAPE & ZIPS
FR WORKWEAR
TYPE OF PROTECTION
Army & Police 100% Cotton    
Electric Utility 88/12 Modacrylic FR Jackets ISO 11611
Emergency (911) 80/20 Cotton/Polyester FR Pants ISO 1149-5
Mining 99% Cotton/1%Antistatic  FR Shirts NFPA 2112
Oil & Gas 93 M-Aramid/5 P-Aramid/2AS  FR Underwear NFPA 70/E
Power Plants 100% Meta-Aramid FR Rainwear ASTM F1506
Railway Roads 100% Para-Aramid   ASTM F1959 (ARC)
Welding 50% FR-Viscose/50 M-Aramid   EN 61482-1-2
  N 3A Aramid   EN 469
  FR Reflective tapes   EN 61482-1-2 (ARC)
  FR Zippers    
  FR Sewing threads