Protection against Heat & Flame, Limited Flame Spread
This standard replaces the withdrawn EN533. While the standard does deal with the issue of flame resistance to some extent, it is arguably more suited to outerwear that would usually be worn over other protective garments. For this reason ProGARM have opted to rather meet EN11612 which offers a higher standard of protection.
Clothing manufactured to this standard is made from flame retardant materials so that if the material comes into contact with a flame, it will only continue to burn for a limited amount of time. After removal from the flame, the material will stop burning. Clothing in this category should not be worn to protect against convective heat, radiant heat, molten metal or similar higher risk hazards.
The contents of this standard
For fabrics, this standard only has a flame spread test and the test results are given as Index values as detailed below. The number of wash cycles and the washing method used to achieve the stated index value are also given under the EN Standard pictogram. E.g. “25H” indicates 25 domestic wash cycles (this can also be indicated as “I” for industrial wash cycles or “C” for chemical cleaning such as Dry Cleaning). The “60” represents the laboratory washing temperature in degrees Celsius. There are also requirements in this standard for the seam strength to be tested and for tests to ensure the flame retardant properties of the garment’s seams meet the requirements.
Different tests, codes
Index 1: No flaming to the top or side edge, no flaming debris and no afterglow shall spread from the carbonized area to the undamaged area. Hole formation is possible under this Index. These fabrics should not be worn next to the skin. An example of a fabric in the category would be an FR polyester which will meet the requirements but will always form a hole.
Index 2: No flaming to the top or side edge, no flaming debris and no afterglow shall spread from the carbonized area to the undamaged area. No hole formation possible with this Index. The requirements are the same as Index 3 but no maximum afterflame time is specified.
Index 3: Requirements are the same as Index 2, but the Afterflame time of each individual specimen should not exceed 2 seconds.