Hsinchu Gas Blast: Detector Claims Questioned Amid Fatalities

A devastating gas explosion at a Hsinchu City bento shop, which claimed two lives and injured two others, has brought scrutiny to the shop owner's assertion of having installed a gas leak detection alarm. Investigators at the scene found no such device, raising questions about the safety measures in place.

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If the business owner had indeed installed an alarm, both types of functions would be sufficient to prevent a disaster.

Firefighters emphasized the critical role of gas leak detectors in preventing such tragedies. They explained that two main types exist: one that automatically shuts off the gas supply upon detection, and another that simply emits an alarm. Either type, if correctly installed and operational, could have averted the disaster. However, they cautioned that improper placement or a malfunctioning unit could render the safety device ineffective.

To ensure optimal performance, fire officials provided guidance on the correct installation of gas detectors. For natural gas (which is lighter than air), detectors should be placed high up, within 30 cm of the ceiling. For bottled liquefied petroleum gas (which is heavier than air), detectors should be installed low to the ground, within 30 cm of the floor, as the gas tends to settle in lower areas.

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Detectors for natural gas should be installed high up, within 30 cm of the ceiling, because natural gas, mainly methane, is lighter than air and will accumulate towards the ceiling, ducts, or enclosed spaces above.

Experts also advised against installing detectors directly above stoves, near range hoods, in the path of air conditioners or fans, or in bathrooms and high-humidity environments, as these conditions can interfere with the detector's ability to sense gas leaks accurately. The incident underscores the importance of proper safety equipment and its correct installation in preventing potentially fatal accidents.

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For bottled gas, install it low to the ground, within 30 cm of the floor, because propane and butane, the main components of bottled gas, are heavier than air and will sink, accumulating in low-lying or poorly ventilated areas.