Analysis of ES hazards in overfilling protection gauge |
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| Affiliation: | 1. TÜV SÜD Process Safety, Basel, Switzerland;2. Swiss Process Safety, Basel, Switzerland;1. APELEC Laboratory, Djillali Liabes University of Sidi Bel-Abbes, Algeria;2. PPRIME Institute, University of Poitiers – IUT, Angoulême, France;1. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China;2. Central China Branch of State Grid Corporation of China, Wu Han 430077, China;1. KOMAG Institute of Mining Technology, Pszczyńska 37, 44-101 Gliwice, Poland;2. Wroclaw University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wroclaw, Poland |
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| Abstract: | Gauging operations can cause electrostatic ignition in road tankers during filling operations involving flammable liquids. For this reason, gauging from above the liquid surface should not be carried out in a road tanker containing a flammable atmosphere when hazardous conditions are present.Introduction of an overfilling sensor to automatically stop the filling in case of deviation can be a safety measure to prevent overfilling of the road tanker and the generation of a rather big flammable pool.Nevertheless, this situation generates a conflict of interest with the formerly described safety measure of preventing a charged liquid to approach a counter-electrode in presence of a explosive atmosphere.This situation has been assessed in detail by using a simulation program. It was clear that the gauge could lead to an ignition already when the liquid approached the edge of the gauge. A new design was defined to prevent such hazard. |
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| Keywords: | Gauging operations Discharge prevention |
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