危险区域电气设备安装注意事项101021蔡文.pptx

Installation of Electrical Equipment in Hazardous AreasDenial of Ignition Sources to flammable GasesIt cannot be stressed how important the philosophies followed to deny ignition sources to flammable gases are.The smallest ignition source can lead to the most dire consequences……,Both far away – Deepwater Horizon, Gulf of Mexico, April 2010And close to home - Pingyu Coal Electric Co Ltd, Yuzhou, Henan Province, October 2010This presentation is based on the International Elecrotechnical Commission’s publication IEC-60079There are other publications such as the National Electric Code (NEC) in the USA that have also produced standards for hazardous areas but the equipment in this project will be to IEC standardsThe IEC has over a century of experience producing electrical standardsThe first hazardous area standards were created for the mining industry and then expanded to include the oil and gas sectorIEC standards are not frozen in time but evolve for many reasons such as new materials being produced, technical advances are made and findings from disaster enquires to name but a few These standards are written to provide the best possible protection in the event of a gas escape utilising experience of prior disasters and the leading experts in the hazardous area field Flammable gases require ONLY ONE source of ignitionAll equipment MUST comply with the regulationsDisaster news stories usually say there was AN explosionAll regulations MUST be adhered to=============There can be no exceptionsThe zones for this vessel can be found on drawing M40188-1030015 - Hazardous Area PlanPlus - all equipment in exterior locations which is capable of operation after a shutdown is to be suitable for installation in Zone 2 locationsThere are various philosophies that are defined by the IEC to deny source of ignitionNote; There is a philosophy hierarchy, Zone 0 equipment can be used in Zones 12, Zone 1 equipment can be used in Zone 2 List of Hazardous Areas on Hai Yang Shi You 981Bell