CEI EN 60079-10 Electrical Apparatus For Explosive Gas

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Extra info for CEI EN 60079-10 Electrical Apparatus For Explosive Gas Atmospheres. Classification Of Hazardous Areas

Sample text

Inferiore alla temperatura di processo e alla temperatura ambiente Flash point....................................... Below process and ambient temperature Densità dei vapori...................... Superiore a quella dell’aria Vapour density................................ Greater than air *All’interno del serbatoio e della fossa, basso. *Within the tank and the sump, low. Taking into account relevant parameters, the following are typical values which will be obtained for this example: a = 3 m from vent openings; b = 3 m above the roof; c = 3 m horizontally from the tank.

A = 3 m in orizzontale dalla sorgente di emissione; b = 1 m dal livello del suolo e fino ad 1 m sopra la sorgente di emissione. Due to the high air flow, the extent of zone 1 is negligible. Grazie all’elevato flusso dell’aria, l’estensione della zona 1 intorno alla sorgente di emissione è trascurabile. NORMA TECNICA CEI EN 60079-10:1996-10 Pagina 37 di 62 Example No. 2 A normal industrial pump mounted at ground level, situated indoors, pumping flammable liquid: Esempio N° 2 Una normale pompa industriale installata a livello del suolo, situata al chiuso, che pompa liquido infiammabile: CAPTION LEGENDA 1 2 1 2 Ground level§ Sump Livello del suolo Fossa Non in scala Not to scale 1 2 Zona 1_Zone 1 Zona 2_Zone 2 Sorgente di emissione (tenuta pompa) Source of release (pump seal) Esempio 2 Principali fattori che influenzano il tipo e l’estensione delle zone Principal factors which influence the type and extent of zones Impianto e processo Plant and process Ventilazione Ventilatation Tipo..........................................

11 is a plan view; for vertical extent of the zones, see examples Nos. 1, 6, 8 and 9. ) see examples Nos. 1, 6 ,8 and 9. In questo esempio è illustrato un modo di utilizzo degli esempi N° 1, 6, 8 e 9. All’interno del deposito si trovano: tre serbatoi di benzina con bacino di contenimento (elemento 3), cinque pompe di liquido installate una a fianco all’altra (elemento 1), una pompa singola (elemento 1), un impianto per il caricamento di autobotti (elemento 4), due serbatoi di gasolio (elemento 4) e un separatore a gravità olio/acqua (elemento 2).

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