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A Study on the Correlation of MESG and Explosion Pressure
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 Title & Authors
A Study on the Correlation of MESG and Explosion Pressure
Hwang, Kyungyong; Shin, Woonchul; Lee, Taeck-Kie;
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 Abstract
Electrical apparatuses for use in the presence of explosive gas atmospheres have to be special designed to prevent them from igniting the explosive gas. Flameproof design implies that electrical components producing electrical sparks are contained in enclosures and withstand the maximum pressure of internal gas or vapours. In addition, any gaps in the enclosure wall have to designed in such a way that they will not transmit a gas explosion inside the enclosure to an explosive gas or vapours atmosphere outside it. In this study, we explained some of the most important physical mechanism of Maximum Experimental Safe Gap(MESG) that the jet of combustion products ejected through the flame gap to the external surroundings do not have an energy and temperature large enough to initiate an ignition of external gas or vapours. We measured the MESG and maximum explosion pressure of propane and acetylene by the test method and procedure of IEC 60079-20-1:2010.When the minimum MESG is measured, the concentration of propane, acetylene in the air is higher than the stoichiometric point and their explosion pressure is the highest value.
 Keywords
MESG;Maximum Experimental Safe Gap;explosion pressure;flameproof;propane;acetylene;
 Language
Korean
 Cited by
 References
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