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INERT GAS SYSTEMS AND PROCEDURES

Inert gas system The salient features of the inert gas regulations are listed below Note:  Nitrogen generators are now used on Chemical tankers due to the nature of Nitrogen (No soot or water carry over). The system consists of the following components Boiler uptake valves

CARGO TANK PREPARATION

The circumstances of a substantial claim recently settled by the Club in respect to cargo contamination and shortage clearly underline the fact that some masters do not understand that the suitability of cargo spaces for the intended cargo is their responsibility and theirs alone. Inadequate

CARGO HEATING

Cargo heating Normally cargo heating uses steam as the media for heat exchange, but some ships use special hydraulic oil as a medium. The voyage orders will clearly indicate if the cargo requires heating and the temperature to be maintained. Normally the heating clause in

STOWAGE PLAN ON CONTAINER VESSEL

Stowage on container vessels The modern container vessel is also divided into holds, but using a similar system for containers would be impossible as a hold may contain anywhere between 50 to 250 containers and the port stay is in hours. Some system to identify

TANKER OPERATIONS

Tank cleaning It is customary to clean the cargo tanks as a preparation to load the next cargo after the cargo is discharged and the tanker sails out from the discharge port. This is done because the next cargo may not be compatible with the

Valves

Types of Valves You have by now understood the functions of a valve. These act as controls and allow or stop flow of any material. In the study of these valves, it is necessary to understand: The mechanism which controls the flow, Operation of the

TANK ENVIRONMENTAL CONTROL

METHODS OF CONTROL Before any cargo operations are carried out it is essential that cargo tanks be thoroughly inspected for cleanliness; that all loose objects are removed; and that all fittings are properly secured. In addition, any free water must be removed. Once this inspection

Cargo Pumps

A cargo pump is a machine used to propel the liquid cargo from the tank into a pipe so that it may reach the shore tank (be discharged). We have learnt in our school days that the atmosphere can support a column of 10.336 m

MEASUREMENT OF OIL CARGOES & ASTM TABLES

Oil cargoes, like any other substance, can be measured in volume or weight. The volume will vary with temperature and hence it should be expressed in standard units so that a comparative study can be made. Temperature is measured in degrees Fahrenheit or degrees centigrade.

ODMCS

OIL DISCHARGE MONITORING CONTROL SYSTEM System The system required shall be such that the three way valve to allow discharge of the oily water into the sea, shall open once the above condition are satisfied and will remain open until such time as the above