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HSE assingnment describing safety featres in CNG Plant in ESD, Cascades and Electrical connections
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Emergency Shut-Down system (ESD) CNG compressor packages are provided with an Emergency Shut-Down (ESD) system. The ESD system is activated by pressing a mushroom head type Emergency switch mounted in a safe possible location.The ESD system when activated, Brings the unit to an immediate halt Isolates the unit from Gas suction line Closes all the output priority valves , thus isolating the compressors, cascades and dispensers from earthquakes.Electrical ConnectionsThe cables are terminated with double compression Explosion of glands. The electric motors are explosion proof with motor protection relays with multiple safety features. The instruments/sensors are made intrinsically safe suitable for hazardous area application.Salient features of CascadesTYPE3000/2000L Water Capacity
NO OF BANKS3 or 1
DESIGN CODE
CYLINDERSGAS CYLINDER RULES + IS 7285
VALVESIS 3224
SAFETY DEVICESIS 5703
OPERATING PRESSURE255 BAR
TEST PRESSURE435 BAR
Safety Features of Cascade Pressure Relief Devices (PSD) are provided in the form of Burst discs with fusible plug, to relieve the excess pressure. The vent of relief devices of individual cylinders is connected to a common manifolds and released to atmosphere at a safe location CNG cylinders are hydro-tested every 5 years.