Cassette Range

1. Accident Occurrence Situations

When a pot was placed on a cassette range to ignite, the user smelt gas but continuously used it. 2 or 3 minutes later, suddenly a fire explosively started between the pot and the cassette range. Though the fire was instantly extinguished, a person cooking then got slightly burnt.

The accidental product, which was purchased 10 years ago was used approximately once a year and stored in a container box after the use.

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2. Origins of Accident

Based on the situation of the accident, the NITE observed the external appearance of the product causing the accident, confirmed the accident phenomenon, performed the airtight test, observed the governor (pressure regulator), and analyzed the material.
The result showed that a fine crack was found in the governor portion and the zinc base alloy, or the using material, contained considerable amount of impurities such as lead and tin. When there are many impurities contained in the zinc base alloy, the device will be corroded by the long use. The accident was judged to occur in such a manner that fine cracks were formed by the corrosion of the gas passage, and the gas leaked from them to be explosively burst into flames.

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3. Matters Required Attentions

To prevent the similar accident from occurring again, please confirm the type of the cassette range in use, and if it is the same type of the cassette range, by way of precaution, stop using it.