ENGINEERING & MEO CLASS 4 & 2 NOTES

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on February 14, 2017

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Materials for Seawater Pipeline Systems

Materials for Seawater Pipeline Systems Introduction A range of materials is available for the construction of piping systems conveying seawater to machinery and plant installations. The purpose of the present paper is to review the technical and economic advantages and disadvantages of the different types of materials for the various applications concerned. Applications The main applications to be considered are seawater intakes and distribution systems for: • Sea-going and coastal vessels of all types • Offshore oil and gas platform installations • Desalination plants producing fresh water from seawater • Coastal petroleum and petrochemical processing plants • Coastal electricity generating stations. Material Requirements The factors that are relevant in choosing a material for such applications are: • Resistance to corrosion by seawater over a wide range of operating conditions • Resistance to corrosion by the external environment • Resistance t...

MAIN SWITCH BOARD (MSB) SAFETIES: Electrical safeties: Dead front type switchboard, Fuses, Relays, Circuit breakers, Earth fault indicators, Under voltage relay, Reverse power trip, Preferential trip, Over current trip, Short circuit trip, Arc chute, Ebonite Rod ( to remove static charge). General safeties: · Insulated hand gloves, dry boiler suits, shoes without metallic part, Rubber pad in front of switchboard, 0.6m gap behind switchboard, Panel doors to be earthed, interlocked handles for opening doors. · No water, oil, or steam pipeline in its vicinity. Overhead crane safeties: 1) The most important safety feature of the crane is the electromagnetic fail safe brakes which do not ...

Main engine Troubleshooting part 1

SPARKS FROM THE FUNNEL CAUSES: It can be caused by too much after burning or poor combustion. In case the exhaust temperature is too high, there could be a soot fire. REMEDIAL ACTION: Check fuel oil temperature and scavenge temperatures. Drain the fuel oil tanks. A Dirty economizer should be soot blown and water washed when the engine is stopped. TOO MUCH SPARKING FROM THE FUNNEL CAUSES: If the exhaust gas temperatures are too high in addition to heavy sparking at the funnel, there is a possibility of a fire at the economizer or a scavenge fire. REMEDIAL ACTION: Stop the engine, but do not run at low loads since un burnt fuel is more at low loads. Start the standby economizer water circulating pump to increase cooling. Provide boundary cooling. Stop the engine & shut the air inlets at the turbocharger and auxiliary blowers. CYLINDER RELIEF VALVE LIFTING UP CAUSES: This can be due to excess fuel supplied during starting or maneuverings Accumulated or un burnt fuel igniti...

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