PRECAUTIONS TO BE OBSERVED WHILE CLEANING CHEMICALS

PRECAUTIONS:

1. Some chemicals produce toxic gases, hence carryout ventilation while using such chemicals,
2. Use protective clothing while cleaning chemicals and barrier creams which may help to protect the skin may be applied,
3. A chemical from an un_labelled container should never be used unless uts identify has been positively established,
4. Chemical should always be handled with utmost care,eyes and skin should be protected from accidental exposure or contact,
5. Manufacturer or supplier's advice on the correct use of chemicals  should always be followed,
6. Chemical should not be mixed unless is it known that the dangerous reaction will not be caused.
7. Carbon tetra chloride should not be used for cleaning electrical equipments, because of the High toxicity of its vapours,
8. A record (Product data sheet) should (when obtainable) be kept on board, available to all users, containing sufficient information to determine the degree of the danger posed by the substance,
9. Exposure to certain substance such as mineral oils, natural solvents, and chemicals including domestic cleaning agents and detergents may cause dermatitis.
10. Suitable gloves should be worn when using such substance,
11. Medical first aid guid should be consulted for accidents involving chemicals,

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SOME RULES &SAFETY PRECAUTIONS RELATING TO PUMPING OUT BILGE

 RULES & SAFETY PRECAUTIONS 

1. Vessel shall have atleast four independent power pumps connected to mains, ballast, sanitary
2. One such pump should be remote operated 
3. pump should be of self priming type,
4. Each pimp should have a direct suction,
5. Main circulation pump should have a direct suction with non return valve,
6. Bilge pipes should not be led through oil tanks or double bottom tanks.
7. Bilge valves should be non return valve,
8. Emergency bilge system should be separated from main system,
9. Bilge pipes should be provided with mud boxes and strum boxes,
10. Sounding pipes where provided are to be as straight as possible,
11. Bilges should never be pumped out directly into sea,
12. Bilges should be pumped via oily bilge separator,
13. Never pump out bilges without the permission of chief engineer,

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STARTING AND RUNNING CHECKS AND STOPPING OF AIR COMPRESSOR

 STARTING PROCEDURE

• check the air bottle pressure and drain  the air bottle for any condensate moisture.

1. Open air  bottle filling  valve.
2. Open compressor air discharge valve,
3. Check compressor sump oil level,
4. Open compressor air cooler cooling water inlet and outlet valves,
5. Purge out cooling water area -jacket etc,
6. Open drain valve of each stage,
7. Crank the compressor by hand a couple of times.
8. Make sure compressor body is free from any other foreign materials,
9.  Start the compressor,

RUNNING CHECKS:

1. close the air cooler air side stages drain valves, starting from 1st stage.
2. Check compressor lub oil pressure and cooling water pressure,
3. Drain each stage cooler and air bottle at regular intervals of 5 mints.
4. Check crankcase and all stages coolers for over heating,
5. Check for any abnormal sounds,
6. Check the air pressure and air temperature of air receiver and every stage of compressor.

STOPPING PROCEDURE:

1. when air bottle attained the required pressure
2. Open the air cooler drain valves (starting from 3rd stage to 1st stage)
3. Stop the compressor,
4. Close compressor outlet valve,
5. Close air bottle inlet valve,.
6. Drain air bottle to remove any condensate,
7. Shut the cooling water inlet and outlet valves, after air compressor has cooled down,
8. Check all valves are in their correct position.

VALVES USED ONBOARD TANKER SHIP

 Valves:

1. Manifold valves
2. Tank valves 
3. Drop valves 
4. Crossover valves 

Where its fitted

 Manifold Valves:

• These valves which are constructed in lines flow to the connecting flanges.

Master valves:

• At each line where a fore and aft pipe lines passes through a tank sich hand operated valve is fitted in the line, these are known as master valves.

Tank valves:

• The Valve which is  close to each bell mouth is located as valve which controls the flow of oil into and out of the tank.

Drop valves:

•  Each main line has one or two drop lines and drop valves control the flow of oil in those line.

Crossover valves:

• Athwart ship tank line joining the line are known as a crossover lines and the crossover valves separating the main line from other as well as separating individual tanks.

STARTING PROCEDURE OF PURIFIER

1.  Switch on the electrical motor 
2. Wait ror 10-15 mint for the purifier to reach it's operational speed (check the ammeter for load on the motor,the current will reduce once the the purifier reached it's operational rpm)
3. Supply sea water( sealing water) by open the sea water line valve.
4. Check the water outlet of purifier, if the water seal is formed.
5. Now close the sea water valve (sealing water)
6. Supply the oil into purifier (through the heater if it is heavy oil or lub oil)
7. Open the operating water line,and keep the line on,.
8. Now purifier is in operation, absorb the oil delivery through the oil line by looking at the sight glass.

SLUDGE OUT PROCEDURE.

1. Close the supply of fuel (also heater)
2. Form the seal.
3. Open de-sludge water by opening the valve.
4. When you hear the hissing noise and see the loas on the motor while high,
5.  shut the de-sludging valve.
6.  That means de-sludging  has been carried out.
7. Now absorb for the motor to be in it's normal load this means the purifier is ready for it's operation 
8. Now follow the starting procedure 3 to 8

GALLEY FIRE ONBOARD SHIP MEO CLASS 4 ORALS

 Major accommodation fire occur in gallery while cooking.

• Incase of fire in oil pan 
• Use fire blanket to extinguish the fire 
• Incase of electrical fire.
• Isolate the electrical supply.
• Use portable co2 extinguisher.
• If fire intensity is high. If its not extinguished by fire blanket or co2 portable fire extinguisher. 
• Switch off the galley supply and exhaust fan. And pull the emergency lever to shut off exhaust hood ventilation,
• Which will placed in galley or entrance of galley.
• Close the galley door.
• Rise the fire alarm, from nearest call point.
• Inform the bridge or ship office incase ship is in port..
• Confirm the galley entrace door and ventilation  and electrical supply is shut off.
• Release the fixed fire fighting System if installed there.
• Otherwise use water and portable extinguisher to fight the fire ..

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