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http://dx.doi.org/10.7842/kigas.2018.22.4.27

A Study on the Examination of Explosion Hazardous Area Applying Ventilation and Dilution  

kim, Nam Suk (Dept. of Enterprise Disaster Safety Management, Incheon National University)
Lim, Jae Geun (Dept. of Enterprise Disaster Safety Management, Soongsil University)
Woo, In Sung (Dept. of Enterprise Disaster Safety Management, Incheon National University)
Publication Information
Journal of the Korean Institute of Gas / v.22, no.4, 2018 , pp. 27-31 More about this Journal
Abstract
Classification of explosion hazard areas is very important in terms of cost and safety in the workplace handling flammable materials. This is because the radius of the hazardous area determines whether or not the explosion-proof equipment is installed in the electrical machinery and apparatus. From November 6, 2017, KS C IEC-60079-10-1: 2015 will be issued and applied as a new standard. It is important to understand and apply the difference between the existing standard and the new standard. Leakage coefficients and compression factors were added to the leakage calculation formula, and the formula of evaporation pool leakage, application of leakage ball size, and shape of explosion hazard area were applied. The range of the safety factor K has also been changed. Also, in the radius of the hazardous area, the existing standard applies the number of ventilation to the virtual volume, but the revised standard is calculated by using the leakage characteristic value. In this study, we investigated the differences from existing standards in terms of ventilation and dilution and examined the effect on the radius of the hazard area. Comparisons and analyzes were carried out by applying revised standards to workplaces where existing explosion hazard locations were selected. The results showed that even if the ventilation and dilution were successful, the risk radius was not substantially affected.
Keywords
explosion hazard area; ventilation; dilution; release characteristics;
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  • Reference
1 KS C IEC 60079-10-1, Explosive atmospheres part 10-1 : Classification of Explosion hazard Area, Korean Industrial Standards, 2012.
2 KS C IEC 60079-10-1:2015, Explosive atmospheres part 10-1 : Area Classification- Explosion Gas Zone, Korean Industrial Standards, 2015.
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