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A Class K blaze extinguisher is acclimated on fires involving affable media (fats, grease, and oils) in bartering affable sites such as restaurants. These blaze extinguishers assignment on the assumption of saponification. Saponification takes abode back acrid mixtures, such as potassium acetate, potassium citrate, or potassium carbonate, are activated to afire affable oil or fat. The acrid admixture accumulated with the blubbery acerbic creates a bubbling cream on the apparent that holds in the abasement and beef and extinguishes the fire. These extinguishers are articular by the letter K.
Labeling Blaze extinguishers are labeled so users can bound analyze the classes of blaze on which the extinguisher will be effective. The appearance arrangement combines pictographs of both recommended and unacceptable extinguisher types on a distinct identification label. Following are examples of archetypal labels.
Also amid on the blaze extinguisher characterization is the UL rating. The UL appraisement is burst bottomward into Class A and Class B:C ratings. These after ratings acquiesce you to analyze the about aition capability of assorted blaze extinguishers. For example, an extinguisher that is rated 4A:20B:C indicates the following:
When allegory these ratings, agenda there is not a after appraisement for Class C or Class D fires. Class C fires are about either a Class A or a Class B blaze involving activated electrical accessories area the blaze aition media charge be non-conductive. The blaze extinguisher for a Class C blaze should be based on the bulk of the Class A or Class B component. For extinguisher use on a Class D fire, the about capability is abundant on the extinguisher nameplate for the specific burnable metal blaze for which it is recommended.
This commodity originally appeared in the August 2004 affair of Occupational Health & Safety.
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