• Journal of the Korean Institute of Gas
• /
• v.27 no.4
• /
• pp.56-61
• /
• 2023

The plant is an important facility as a infrastructure, and ensuring safety against possible accidents such as gas leaks and explosions must be considered in the design. However, there is little study on explosion pressure in plants for reasons such as economic feasibility, and overpressure data on this field is insufficient. In this study, an experimental design plan considering the explosion scenario that may occur in the plant was presented, and the explosion pressure was confirmed through an explosion experiment. Hydrogen-methane mixed gas was used as a combustible material, and the effect of confinement and congestion on overpressure was studied. The effect of overlapping pressure waves during deflagration and the turbulence effect by congested pipes are discussed. The results of this study can be used as input data in various safety designs.

• Fire Science and Engineering
• /
• v.26 no.2
• /
• pp.84-89
• /
• 2012

For the safe handling of n-nonanol, this study was investigated the explosion limits of n-nonanol in the reference data. The flash points and AITs (autoignition temperatures) by ignition delay time were experimented. As a results, the lower and upper explosion limits of n-nonanol recommended 0.8 Vol.% and 6.1 Vol.%, respectively. The lower flash points of n-nonanol by using closed-cup tester were experimented $94{\sim}97^{\circ}C$. The lower flash points of n-nonanol by using open cup tester were experimented $103{\sim}104^{\circ}C$. This study measured relationship between the AITs and the ignition delay times by using ASTM E659-78 apparatus for n-nonanol. The experimental AIT of n-nonanol was $270^{\circ}C$.

• Fire Science and Engineering
• /
• v.29 no.2
• /
• pp.20-24
• /
• 2015

For the safe handling of anisole, this study was investigated the explosion limits of anisole in the reference data. The flash points and auto-ignition temperatures (AITs) by ignition delay time were experimented. The lower flash points of Anisole by using closed-cup tester were experimented in $39^{\circ}C$ and $42^{\circ}C$. The lower flash points of Anisole by using open cup tester were experimented in $50^{\circ}C$ and $54^{\circ}C$. This study measured relationship between the AITs and the ignition delay times by using ASTM E659 tester for Anisole. The AIT of Anisole was experimented as $390^{\circ}C$. The lower explosion limit (LEL) by the measured the lower flash point for Anisole were calculated as 1.07 Vol%.

• Fire Science and Engineering
• /
• v.25 no.2
• /
• pp.120-125
• /
• 2011

For the safe handling of n-dodecane, the explosion limits were investigated and the lower flash points and AITs (autoignition temperatures) by ignition delay time were experimented. By using the literatures data, the lower and upper explosion limits of n-dodecanee recommended 0.6 Vol.% and 4.7 Vol.%, respectively. The lower flash points of n-dodecane by using closed-cup tester were experimented $77^{\circ}$ and $80^{\circ}C$. The lower flash points of n-dodecane by using open cup tester were experimented $84^{\circ}C$ and $87^{\circ}C$. This study measured relationship between the AITs and the ignition delay times by using ASTM E659-78 apparatus for n-dodecane. The experimental AIT of n-dodecane was $222^{\circ}C$.

• Fire Science and Engineering
• /
• v.31 no.3
• /
• pp.25-30
• /
• 2017

Because of the vertical combustion characteristics of combustible substances, accurate substance safety information for their safe use, handling and transportation is essential. The flash point, fire point, explosion limits and autoignition temperature (AIT) are important safety parameters which need special attention in chemical plants and laboratories that handle dangerous materials. In this study, tert-butylbenzene which is widely used as an intermediate material in the chemical industry was selected. For the reliability of the flammable properties of tert-butylbenzene, this study was investigated the explosion limits of tert-butylbenzene in the reference data. The flash points, fire points and AITs by the ignition delay time for tert-butylbenzene were experimented. The lower flash points of tert-butylbenzene by using the Setaflash and Pensky-Martens closed-cup testers measured $39^{\circ}C$ and $44^{\circ}C$, respectively. The flash points of tert-butylbenzene by using the Tag and Cleveland open cup testers are measured $51^{\circ}C$ and $54^{\circ}C$. And the fire points of tert-butylbenzene by the Tag and Cleveland open cup testers were $54^{\circ}C$ and $58^{\circ}C$ respectively. The AIT of tert-butylbenzene measured by the ASTM 659E tester was measured as $450^{\circ}C$. The lower explosion limit of $39^{\circ}C$ which measured by the Setaflash flash point tester was calculated to be 0.68 vol%.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
• /
• 2005.05a
• /
• pp.3-6
• /
• 2005

• Fire Protection Technology
• /
• s.11
• /
• pp.23-30
• /
• 1991

For the prevent of fire accident or explosion disasters from inflammable gas and vapour, flame arresters are used in chemical equipment, oil tank or other similar installation. The flame arresters have been used mainly wire gauze type. Wire gauze type flame arrestes is affected several factors. We have know that the quenching ability has a great of difference the preference in accordance with flame velocity, direction of flame propagation and wire net of mesh and number of qauze and introduce examination result data quoated from the abroad.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
• /
• 2010.04a
• /
• pp.68-72
• /
• 2010

부산 실내사격장 화재의 사격실 내 폭발의 원인을 추정하고 안전대책을 강구하기 위해 화재 시뮬레이션과 외국 실내사격장 화재의 사례조사를 수행하였다. 사격실 내의 폭발원인은 다공성 계란판형 폴리우레탄 흡음재와 흡음재에 축적된 잔류화약 분말의 격렬한 연소로 추정되었다. 실내사격장의 안전대책으로 폴리우레탄 흡음재의 사용금지, 잔류화약의 제거와 철저한 관리, 금연, 탄자받이 주위의 강재 요소 제거, 효율적 환기 등이 요구된다.

• Journal of Korean Institute of Fire Investigation
• /
• v.9 no.1
• /
• pp.35-46
• /
• 2006

본 연구에서는 변압기의 종류와 각 변압기의 특징에 대해 살펴보았다. 최근 변압기 사고의 발생현황과 통계를 살펴보고, 화재 및 폭발 안정성에 가장 취약한 지상설치형 유입식 변압기를 대상으로 절연유 분출원인 및 폭발 현상 등 변압기 사고의 주요 원인에 대해 이론적으로 연구하였다. 또한, 화재 폭발 메카니즘을 살펴봄으로서 그 위험성을 인지하고, 유입식 변압기의 사고의 방지를 위한 대책 마련을 하고자 하였다.

• Journal of ILASS-Korea
• /
• v.20 no.2
• /
• pp.101-106
• /
• 2015

Gas leakage and dispersion in the underground LNG power plant can lead to serious fire and explosion accident. In this study, computational fluid dynamics simulation was applied to model the dynamic process of gas leakage and dispersion phenomena in a closed space. To analyze the risk assessment factor, such as the flammable volume ratio, transient simulations were carried out for different scenarios. The simulation results visualized the gas distribution with time in the closed space. The flammable volume ratio was introduced for quantitative analysis the fire/explosion probability.