Articles related to Marine engineering practice
Watchkeeping and equipment Operation
- In: Marine engineering practice
- Published Date
- By DieselShip
- Hits: 551
.jpg&w=150&zc=1&q=95 "Watchkeeping and equipment Operation")
Watchkeeping and equipment Operation
The 'Round the clock' operation of a ship at sea requires a rota system of attendance in the machinery space. This has developed into a system of watchkeeping that has endured until recently. The arrival of 'Unattended Machinery Spaces' (UMS) has begun to erode this traditional practice of watchkeeping. The organisation of the Engineering Department, conventional watchkeeping and UMS practices will now be outlined.
The Engineering Department
The...
The 'Round the clock' operation of a ship at sea requires a rota system of attendance in the machinery space. This has developed into a system of watchkeeping that has endured until recently. The arrival of 'Unattended Machinery Spaces' (UMS) has begun to erode this traditional practice of watchkeeping. The organisation of the Engineering Department, conventional watchkeeping and UMS practices will now be outlined.
The Engineering Department
The...
DERRICKS
- In: Marine engineering practice
- Published Date
- By Logeswari N
- Hits: 1220
DERRICKS
Most older ships and some recent ones use winches in conjunction with derricks for working cargo. The derricks may be arranged for fixed outreach working or slewing derricks may be fitted. A fixed outreach system uses two derricks, one ‘topped’ to a position over the ship’s side and the other to a position over the hold. Figure 9.9 shows the commonest arrangement adopted, known as Union Purchase rig. The disadvantages of the fixed outreach...
Most older ships and some recent ones use winches in conjunction with derricks for working cargo. The derricks may be arranged for fixed outreach working or slewing derricks may be fitted. A fixed outreach system uses two derricks, one ‘topped’ to a position over the ship’s side and the other to a position over the hold. Figure 9.9 shows the commonest arrangement adopted, known as Union Purchase rig. The disadvantages of the fixed outreach...
The Realities and Myths of Bunker Fuel Contaminants
- In: Marine engineering practice
- Published Date
- By Ramalingam
- Hits: 439
The Realities and Myths of Bunker Fuel Contaminants
Chemical contamination in Bunker Fuels; what is it? Why does it occur? What are the damaging chemicals and effects on the ships engines? What are the common testing techniques used by laboratories? And what protection can the ship operators expect?You may have recently seen an increase in the number of news items talking about chemically adulterated fuel. It has been well debated & discussed but looking...
CARGO HANDLING
- In: Marine engineering practice
- Published Date
- By sivasankar
- Hits: 903
CARGO HANDLING
The duty of a deck winch is to lift and lower a load by means of a fixed rope on a barrel, or by means of whipping the load on the warp ends; to top or luff the derricks, and to warp the ship. In fulfilling these duties it is essential that the winch should be capable of carrying out the following requirements:
(a) lift the load at suitable speeds;
(b) hold the load from running back;
(c) lower the load...
The duty of a deck winch is to lift and lower a load by means of a fixed rope on a barrel, or by means of whipping the load on the warp ends; to top or luff the derricks, and to warp the ship. In fulfilling these duties it is essential that the winch should be capable of carrying out the following requirements:
(a) lift the load at suitable speeds;
(b) hold the load from running back;
(c) lower the load...
DECK CRANES
- In: Marine engineering practice
- Published Date
- By Logeswari N
- Hits: 1416
DECK CRANES
A large number of ships are fitted with deck cranes. These require less time to prepare for working cargo than derricks and have the advantage of being able to accurately place (or spot) cargo in the hold. On container ships using ports without special container handling facilities, cranes with special container handling gear are essential. Deck-mounted cranes for both conventional cargo handling and grabbing duties are available with lifting capacities of...
A large number of ships are fitted with deck cranes. These require less time to prepare for working cargo than derricks and have the advantage of being able to accurately place (or spot) cargo in the hold. On container ships using ports without special container handling facilities, cranes with special container handling gear are essential. Deck-mounted cranes for both conventional cargo handling and grabbing duties are available with lifting capacities of...
HEAT TREATMENT
- In: Marine engineering practice
- Published Date
- By Mayurdhwaj
- Hits: 823
HEAT TREATMENT
Iron carbon diagram
The austenite- ferrite transformation
Under equilibrium conditions, pro-eutectoid ferrite will form in iron-carbon alloys containing up to 0.8 % carbon. The reaction occurs at 910°C in pure iron, but takes place between 910°C and 723°C in iron-carbon alloys However, by quenching from the austenitic state to temperatures below the eutectoid temperature Ae1, ferrite can be formed down to temperatures as low...
Iron carbon diagram
The austenite- ferrite transformation
Under equilibrium conditions, pro-eutectoid ferrite will form in iron-carbon alloys containing up to 0.8 % carbon. The reaction occurs at 910°C in pure iron, but takes place between 910°C and 723°C in iron-carbon alloys However, by quenching from the austenitic state to temperatures below the eutectoid temperature Ae1, ferrite can be formed down to temperatures as low...
