Determination of flashpoints for flammable liquids
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Determination of flashpoints for flammable liquids
The flashpoint is the lowest temperature at which a flammable liquid produces vapour which can be ignited by a naked flame or spark. Liquids classed as Class 3 flammable liquids in the UN classification system have a flashpoint of 60°C or below. It is the shipper’s responsibility to determine the flashpoint in the classification process, and to include it in the shipper’s declaration.
Liquids with a flashpoint above 60°C are not regarded as flammable liquids by the IMDG Code.
Descriptions of substances with a sub-hazard of Class 3 are also required to include the flashpoint in the document.
Flashpoints for technically pure Class 3 substances are displayed in Column 17 of the Dangerous Goods List. Flashpoints for N.O.S. substances depend upon the component parts of the substance, and the shipper must determine the flashpoint by product testing and declare the finding in his shipper’s declaration.