Skip to main content

Classification Society Rules for STARTING AIR SYSTEM

AIR BOTTLES:- Two or more air bottles of equal capacity are to be provided. With both the bottles completely pressed up, they should be able to give 12 starts of main engine, alternately in Ahead and Astern direction, without having to replenish them with air from compressors. This is in case of reversible engines. For non reversible engines, 6 starts should be possible under similar conditions.


AIR COMPRESSORS :- Two or more main air compressors should have the capacity divided between them to fill up the air bottles starting from atmospheric pressure to required capacity within one hour.


SAFETY DEVICES :-
1. Non return valve in starting air line, closest to main engine.
2. Pressure relieving device in starting air line, viz Bursting Disc.
3. Relief Valve in each Cylinder head of Main Engine.
4. Flame trap or flame arrestor in starting air line close to cylinder
    head.
5. Means to prevent admission of starting air to cylinder already          firing.
6. Fusible plug and Relief valve on air bottle.

7. Relief valve on each stage of air compressor.
8. Unloaders on air compressor.

9. Bursting disc on Inter/ after coolers.
10. High air temperature alarm for compressor.
11. Overload trip for compressor motor.




Comments

  1. Enjoyed the article, really explains everything in detail, it is very interesting and useful at the same time. Keep up the good work. online propane handling training. Thank you.

    ReplyDelete

  2. Your blog has some excellent information; we appreciate you taking the time to share it with us. Moreover, you could look customer relationship management module in erp

    ReplyDelete

Post a Comment

Popular posts from this blog

Difference Between A, B & C-Class Divisions?

IMO Symbol A Class Division  IMO Symbol B Class Division  SOLAS has tables for structural fire protection requirement of bulkheads and decks. The requirements depend on the spaces in question and are different for passenger ships and cargo ships. The Administration has required a test of a prototype bulkhead or deck in accordance with the Fire Test Procedures Code to ensure that it meets the above requirements for integrity and temperature rise. Types of Divisions: "A" Class "B" Class "C" Class "A" Class: "A" class divisions are those divisions formed by bulkheads and decks which comply with the following criteria: They are constructed of steel or equivalent material They are suitably stiffened They are constructed as to be capable of preventing the passage of smoke and flame to the end of the one-hour standard fire test. they are insulated with approved non-combustible materials such that the average tempera...

Bilge Injection Valve

Bilge Injection is a valve that enables the engine room bilges to be pumped out directly overboard in the event of an emergency such as flooding. The valve is normally fitted to the end of a branch connection with the main sea water suction line. This enables large main seawater cooling pumps to be used as a bilge pump in an emergency. Emergencies like fire and flooding involve the use of seawater. If there is a fire, seawater is the biggest resource of water available in the sea. Similarly, if it involves flooding of the engine room, cargo spaces or any other place on the ship for that matter; you would again require pumping the sea water out of the ship. In both these cases, you require pumps.  There are two valves in close proximity namely main injection valve and bilge injection valve. Both of them have their own independent controls. The diameter of the bilge injection valve is kept nearly 66% of the main valve diameter which draws water directly from the sea th...

Load Line & Why it is Important

Merchant ships have a marking on their hull know as the Plimsoll line or the Plimsoll mark, which indicates the limit until which ships can be loaded with enough cargo, internationally, the Plimsoll line on a ship is officially referred to as the international load line. Every type of ship has a different level of floating and the Plimsoll line on a ship generally varies from one vessel to another.  All vessels of 24 meters and more are required to have this Load line marking at the centre position of the length of summer load water line. There are two types of Load line markings:- Standard Load Line marking – This is applicable to all types of vessels. Timber Load Line Markings – This is applicable to vessels carrying timber cargo. These marks shall be punched on the surface of the hull making it visible even if the ship side paint fades out. The marks shall again be painted with white or yellow colour on a dark background/black on a light background.  ...