• The Journal of the Convergence on Culture Technology
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• v.9 no.3
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• pp.607-617
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• 2023

This study aims to analyze whether the performance of the fire extinguisher meets the criteria for the apparent specific gravity property test by calculating the change in internal pressure and the use period of the fire extinguisher as a new one with 5 years, recycled one with 5 years, a new one with 10 years, and a new one with 13 years, respectively. As a result of the experiment, when the internal pressure of the fire extinguisher was 0%, the first, second, and third arithmetic mean analysis of the dry chemical extinguisher according to the use period was found to be condemned. When the internal pressure of the fire extinguisher was 50%, it was measured as 130 ml in sample 12-08-new and analyzed as unsuitable. Also, sample 09-09-new of a new dry chemical extinguisher with 13 elapsed years measured 145ml, which was found inappropriate. All other dry chemical extinguishers were analyzed to be suitable. All were noted suitable when having normal internal pressure of the fire extinguisher, except for sample 09-06 of a new dry chemical extinguisher with 13 elapsed years, which was determined to be unsuitable caused by measuring as 131 ml for experimental value. As a result of experiments, some of the apparent specific gravity tests of dry chemical extinguishers from 10 years to 13 years have found that they are unsuitable for the performance of the fire extinguishers due to the massive phenomenon. Accordingly, it is necessary to reduce the endurance period of dry chemical extinguishers from 10 years to 7 years.

• Fire Science and Engineering
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• v.26 no.3
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• pp.91-99
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• 2012

Fatal injuries and deaths have occurred resulting from the operation or disassembling of a powder extinguishers in Korea. If a rusted powder extinguisher is exploded during operation or disassembling, it rises to the air like a rocket and hits a head, chest, or neck part of an operator, resulting in his (her) death or injury. In this study examines the explosion accident cases of a powder fire extinguisher and analyzes their causes, reactions to explosion, and precautionary measures. And in this paper suggests 1) no using of old fire extinguishers in fire drill or education, 2) education and public information on danger of old fire extinguishers, 3) indication of explosion danger to cartridge-type dry chemical powder fire extinguishers had already placed to buildings etc., 4) obligatory indication of durable years on fire extinguishers, 5) examination for introduction of system that do hydraulic pressure test about fire extinguishers that given period past, 6) construction of system that reclaim old fire extinguishers, 7) construction of system that recycle or reuse old fire extinguishers, and 8) operation of help desk related to old fire extinguishers as precautionary measure of fire extinguisher explosion accidents.

• The Journal of the Convergence on Culture Technology
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• v.8 no.6
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• pp.661-666
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• 2022

This study presented the criteria for analyzing the corrosion of the powder extinguisher storage container according to the useful life, and conducted an experiment on the market area, the factory area, and the apartment building area to ensure proper performance at all times and drew the following conclusions.First, the experimental value for the degree of corrosion of external contact storage containers was found to be unsuitable in the factory area in 2014. In 2012, the experimental value for the degree of corrosion of external contact storage containers in apartment complexes was found to be inappropriate. Second, the experimental value for the dropout of the external paint in the storage container was found to be inappropriate in the factory area in 2014. In 2012, the experimental value of the degree of coating of the external paint storage container in the apartment building area was found to be inappropriate. It was analyzed that the useful life of the fire extinguisher is 10 years, and if it passes the sample test only once, it will be used for up to 13 years, but in fact, the difference varies greatly depending on the surrounding environment of the fire extinguisher place. Since the degree of corrosion of the storage container of the fire extinguisher from 8 years of the fire extinguisher's useful life is clearly decreased, it is judged that 5 years of the fire extinguisher is appropriate.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2013.04a
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• pp.21-22
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• 2013

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2014.10a
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• pp.904-905
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• 2014

일반 가정이나 산업 현장에서 화재가 발생할 경우 인명 피해와 재산 피해가 막대하다고 할 수 있다. 이러한 막대한 피해를 막기 위하여 국가에서는 소화방재를 위한 법적 검토와 소방 안전교육 및 피난훈련을 실시하고 있다. 그러나 대부분의 화제 현장에서의 초기 대응은 대부분 분말소화기에 의존하고 있는 실정이다. 현재 새롭게 개발된 청정 소화약제를 활용한 고체에어로졸(fixed aerosol) 소화장치를 개발하여 화재 방지시스템을 개발하고 있다. 본 논문에서는 고체에어로졸 소화장치의 활용에 있어서 불꽃감지센서 및 열 감지센서의 데이터를 활용할 수 있고, 화재 발생 현장에 대한 현장 데이터를 원격지에서 모니터링 할 수 있는 유무선통신기반의 제어기 모듈을 개발하여 원격지 화재 현장을 보다 효율적으로 대응할 수 있는 시스템을 개발하고자 한다.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2013.11a
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• pp.43-44
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• 2013

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2005.05a
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• pp.47-55
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• 2005

Fire extinguisher, which is cost effective and easily accessible, is a very effective way of fire suppression. To keep its initial performance it needs periodical inspection and appropriate maintenance. However, many fire extinguishers of which the powder is incompletely coated deteriorates due to the moisture and leak of charge pressure after several years. Accordingly inappropriate powder replacement and pressurization has widely been doing by unqualified persons. Also, the absence of lifetime for fire extinguisher made people keep old bad fire extinguisher without precise inspection. This study specified those issues through case studies and suggested some ways for the systematic improvement.

• Fire Science and Engineering
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• v.30 no.1
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• pp.111-120
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• 2016

This study is intended to provide legislative direction for fire products life expectancy. Domestic and international laws relating to fire products life expectancy have been reviewed, and the results of a Fire Safety Manager Consciousness (FSMC) survey were analyzed. The FSMC survey has been designed in order to assist with the establishment of appropriate fire safety policy. A questionnaire survey was conducted with 660 fire safety administrators from 17 municipal and provincial districts, with the intention of gaining expertise on the extension of life-span for 32 fire products. The survey also asked for candidates opinions on future policy direction. Based on the survey results and the review of policies within other nations, we have devised a set of policy issues with the intention of extending the life-span of fire-safety items. The survey result revealed that 79.3% of Fire Safety Managers (FSMs) concurred with the establishment of legislation regarding the maintenance and correct care of fire-safety products. Overall, over 30% of FSMs were in favor of regulations regarding Ddry chemical fire extinguishers (77.3%), fire detectors (44.6%), fire hoses (44.4%), gaseous agent fire extinguisher (40.6%), automatic descending life lines (36.2%), exit lights (35.9%), air respirators (35.9%), extinguishing systems for residential cooking facilities (33.9%), automatic spray-type extinguishing units (33.9%), emergency lights (31.2%), and gas leakage detectors (30.7%). Especially, among these, dry chemical fire extinguishers (60.0%), detectors (20.0%), and fire hose (18.8%) were identified as the fire products primarily in need of maintenance legislation. The general consensus is that fire products older than 10 years need to be replaced. Based on the survey results, there was general agreement that fire product life expectancy is in need of legislation. This study recommends the introduction of fire product life expectancy legislation in phases.

• Journal of the Society of Disaster Information
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• v.19 no.3
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• pp.644-655
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• 2023

Purpose: Metal fires occur in metal handling, processing, waste storage plants, etc. It is difficult for firefighters to extinguish metal fires, and it takes a long time, so caution is needed in fire suppression. Method: In this study, current statistics and problems of metal fires were introduced, and then the effectiveness was verified by experiments with using fire extinguishing agents used in Korea. Comparative suppression experiments of 5 different fire extinguishing agents for burning powders of 99.9% magnesium over 150 ㎛ were performed following the metal powder type test method of Class D fire in ISO 7165. Result: 5 fire extinguishing agents are the power types of dry sands and expanded vermiculites most commonly used in Korea, the certified class D fire extinguisher used abroad, and ochers requiring verification, and the liquid silica gel. Conclusion: The results of experiments showed expanded vermiculites were the best metal fire extinguishing agent considering effectiveness, convenience of use, and economical feasibility.

• Journal of the Korea Safety Management & Science
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• v.24 no.4
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• pp.117-124
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• 2022

This study collected powder extinguishers with 6-10 years of elapsed life from January 2012 to January 2017 in market, factory, and apartment areas to experiment with changes in fineness and to examine the characteristics of extinguishing power. First, in the case of ABC powder, 98.3 wt% of the 8-year market area and 98.6 wt% of the 10-year apartment complex were found to be inappropriate in the first, second, and third arithmetic average analysis of the powder extinguisher from 6 to 10 years. That is, the fine distribution and size of the powder extinguishing agent particles should be managed within an appropriate range. It is analyzed that the powder fire extinguisher may experience a change in the fineness of the powder depending on the external environment exposure, placement, management status, and age of use, resulting in a decrease in digestive power or inability to radiate. Second, the fire extinguisher cannot be used in the initial fire suppression depending on the place of deployment, the environment of deployment, the progress of the number of years of use, and maintenance, so it is necessary to strengthen the device that enables fire extinguisher maintenance and inspection. Third, in the manufacturing process, the charging method should also be reviewed in consideration of the conditions of the workplace, the humid season, and the rainy environment.