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ARC FLASH BLOGSafety Standards - EN ISO 14116
EN ISO 14116
Protective clothing with lower level of Flame Retardant protection.
The standard is often used for PPE clothing and accessories with lower level Flame Retardant protection, such as High-Visibility vests, rainwear, t-shirts with short sleeves and socks.
It is divided into three classes, where index 3 is the highest level. Index 3 garments should be worn in combination with EN ISO 11612 garments. (It is important to note that Index 1 garments should not be worn next to the skin. This standard does not have a dedicated Symbol/Pictogram.
LOI - Limited Oxygen Index
LOI means the minimum concentration of oxygen (expressed as a percentage) that would be required to support combustion of a fabric. It determines the protection of the garment regarding relative flammability and should be over 25%.
The LOI value is one way to indicate the level of FR protection a garment provides and it makes it easier for the user to compare and choose the right level of protection. LOI level depends on the FR fibre/fibre combination and the fabric weight.
Example of LOI values:
Normal cotton 18%,
Polyester/Nylon 20-22%
Wool 25%
Chemically treated FR cotton 28%
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