Boiler Easing Gear Why is it fitted? As per SOLAS chapter II-1 regulation 32 “Every steam boiler and every un-fired steam generator shall be provided with not less than 2 safety valves of adequate capacity. However, having regard to the output or any other features of any boiler or un-fired steam generator, the administration may…
SCOPE OF DRY-DOCKING SCOPE OF DRY-DOCKING, INSPECTION AND REPAIR TO BE CARRIED OUT (1) BOTTOM INSPECTION AND CORRECTIVE ACTION AS RECOMMENDED BY CLASSIFICATION SOCIETY SURVEYOR. SCOPE OF DRY-DOCKING, INSPECTION AND REPAIR TO BE CARRIED OUT. This is the first visit of the surveyor on the ship. This inspection is carried out as soon as…
SAFE STABILITY CONDITION TO BE PROVIDED DURING DOCKING When docking the ship the ship is slightly trimmed by the stern so that the stern block touches the stern frame first. This is necessary to steady the ship by locating the stern on the block. The stern side is chosen since the stern frame is…
VARIOUS SHIP PLANS REQUIRED BY SHIPYARD FOR DRY DOCKING VARIOUS SHIP PLANS REQUIRED FOR DRY DOCKING :- The following plans and drawings are required to be submitted to the shipyard for their use to enable the ship to be dry docked safely. To be submitted before ship enters dry dock (1) G.A. plan (a…
HOW TO PLAN BUDGET FOR DRY DOCKING DRY DOCK COSTING AND BUDGET The commercial operation of bulk carriers tankers and Container vessels follow a pattern of movement or transportation called world wide tramping whereby the ships have to sail in accordance to instructions and directives from charterers and the route programs are not fixed…
WHAT IS DRY DOCK? NECESSITY OF DRY DOCKING – BY A.K.RAMANUJAN Reasons for dry-docking? Dry dock dry docking necessity. The dry docking activity of cargo ships on a regular basis is a requirement for efficient and safe operation of ships and has two main objectives which are as follows :- To clean, scrub, prepare …
Withdrawal of Propeller shaft, survey and assembly propeller shaft Withdrawal,survey assembly propeller shaft Withdrawal,survey assembly .All large single screw ocean going ships have solid flanged propeller shafts, which necessitates the withdrawal of the shaft within the machinery The Rudder is ;positioned just behind the propeller and hence prevents the outward withdrawal of the shaft…
Vacuum Sewage System General Description The system uses vacuum to transport sewage from toilets and urinals (Collected in a local tank behind the urinal and activated by a float as the level rises) to collecting units. There is a vacuum only ion the piping network and collecting units (Toilets, urinals etc.) remain under atmospheric pressure…
Fatigue of engineering components * Fatigue is the progressive and localized structural damage that occurs when a material is subjected to cyclic loading. The nominal maximum stress values are less than the ultimate tensile stress limit, and may be below the yield stress limit of the material. * Fatigue occurs when a material is subjected…
ROTARY VANE STEERING GEAR – Rotary vane steering gear is usually fitted with 3 fixed vanes and 3 moving vanes and can turn to 700 of total rudder movement i.e 350 on each side. – Three fixed and three moving vanes are usual and permit a total rudder angle of 70’, i.e. 35° in…
Microbial Degradation of lubricating oils onboard One of the vessel I served as Second Engineer suffered a sudden microbial degradation and infestation which caused USD 20000000 on engine repair and a 30 days of laid up with further consequent losses. The ship was about 20 years old with no history of Microbial attack on lube…
Plate type Heat Exchanger Plate type Heat Exchangers are made up from an assembly of identical metal plates pressed together. Such plates have with horizontal or chevron pattern corrugations. Each plate’s working space is protected by a nitrile rubber joint. The plates, which are supported beneath and hung at the top by metal rails on…
