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Many of the changes in everyday life that have taken place during the last fifty years have resulted from developments in the chemical industry. A wide range of ordinary items are in fact derived from complex chemical processes, and are often derived from the by-products of the production of energy. The greatest advances made in…
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Introduction To ensure a fast and effective ability to respond to a fire situation the ship is provided with means to shut off tanks containing flammable liquids that would normally be open; to shut down the pumps and other equipment that could cause or maintain a fire and to shut off air supply to the…
Read More “QUICK-CLOSING VALVES EMERGENCY STOPS AND FIRE DAMPERS” »
Cargo oil tanks must be water washed, purged and gas freed prior to inspection. Cargo oil tanks must NEVER be entered when inerted. Prior to gas freeing any COT or gaseous space, the hydrocarbon content must be below 2% Hc, thus ensuring that the space will not pass through the flammable envelope as the oxygen…
On a general cargo vessel the identification of the location of a parcel of cargo was a simple process. Since the vessel was divided into holds, the first parameter was the hold. Each hold was divided into lower hold and tween decks hence the next parameter was either lower hold or tween dk. Each of…
Read More “Container Vessel – Stowage plan & Slot Identification” »
Introduction These Guidelines have been developed to assist with the maintenance of the shipboard oil pollution plan. Such plan shall be effective if it is carefully tailored to the particular ship for which it is intended. Certain aspects of the plan would be common for all company’s ships but when dealing with equipment and particulars…
The inert gas system (IGS) consists of a main inert gas plant, using boiler flue gas to provide a gas explosion protection system, i.e. a low O2 content in the cargo oil tanks and slop tanks. This is achieved by maintaining a slight overpressure in the tanks at all times. Whilst discharging the cargo, liquid…
Description: A hygrometer is a an easy to use tool for measuring the amount of humidity in the atmosphere and dew point temperature of a parcel of air. The most common type of hygrometer found on board ships is a dry and wet bulb type hygrometer. It comprises of a pair of basic thermometers fixed…
Combined pressure/vacuum valves are fitted to each cargo tank. These valves are designed to relieve positive or negative pressure in the tanks. Combined PV valves are fitted to each cargo oil and slop tank based on the vapor emission control system in accordance with USCG requirements. The purpose of the PV valve is to provide…
Description The exhaust gas boiler, which is located in the engine room at the upper deck level, is used to generate steam from the waste heat in the main engine exhaust gas. It can be operated separately or in connection with the oil fired auxiliary boilers. The steam generating tubes are of the pin tube…
The main cargo pump system consists of three vertical centrifugal single stage double suction type cargo pumps. They are situated at the bottom of the pump room and are driven by a single stage Curtis steam turbine and intermediate shaft passing into the pump room through a gas tight bulkhead gland. The pumps are each…