Download Electrical Safety in Flammable Gas/Vapor Laden Atmospheres by W.O. E. Korver PDF
By W.O. E. Korver
This e-book offers accomplished insurance of electric process install inside of parts the place flammable gases and drinks are dealt with and processed. The exact threat overview of flammability hazards linked to chemical and petrochemical destinations is important in settling on the purpose at which the prices of electric apparatus and set up are balanced with explosion protection standards. The e-book bargains the most up-tp-date code requisites in addition to tables and illustrations as analytic instruments. Environmental features are lined in part 1 besides instructed electric set up and protection techniques. part 2 treats a few program illustrations intimately. part three offers examples for the applying of classifying NEC category 1 destinations.
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Additional resources for Electrical Safety in Flammable Gas/Vapor Laden Atmospheres
Example text
4. The release of large quantities of flammable gases or vapors. 5. Low LEL. 6. Low wind velocity without cross winds and a flat terrain. 7. Heavier-than-air gases or vapors. B. Short Horizontal Traveling Distances 1. Low pressure or low process temperature in the system. 2. Small rupture opening causing a low flow rate of flammable substances. 3. High molecular weight. 4. The release of small quantities of flammable gases or vapors. 5. High LEL. 6. High wind velocity with cross winds and obstructed terrain.
This condition allows the location to be remotely dangerous. If only electrical equipment breaks down there is no danger either, because there are no flammable gases or vapors in the location that can be ignited. This condition also allows the location to be remotely dangerous. However, if both electrical equipment and process equipment break down at the same time, then the location must be considered dangerous even though it is sufficiently ventilated. This does not imply that the failure of process and electrical equipment cannot happen at the same time.
If the temperature is below flash point, the location is not hazardous, and consequently, classification of the location is not necessary. In addition to the first requirement, it is also necessary that electrical equipment be present in the hazardous location. Since electrical equipment is a very effective source of ignition and generally is more effective than any other non-electrical source of ignition, classification of a location must be associated with the presence of electrical equipment.