Answer SSEP Question 1
Q1.
Explain in detail a fixed gas fire extinguisher system, indicating the
quantity of the fire- extinguishing medium, the controls required for
the system, installation requirements and training required to bring the
system to be readily operated.
Drills and Practices for Fire Fighting:
(1) The master shall conduct sufficient fire drills to make sure that each crew member is familiar with his or her duties in case of a fire.
(2) Each fire drill must include:
(a) Summoning passengers on a vessel on an overnight voyage to muster or embarkation stations;
(b) Summoning the crew to report to assigned stations and to prepare for and demonstrate assigned duties;
(c) Instruction in the use and location of fire alarms, extinguishers, and any other firefighting equipment on board;
(3) Each fire drill must, as far as practicable, be conducted as if there were an actual emergency;
(4) Firefighting drills and training shall be logged or otherwise documented for review by the Coast Guard upon request. The drill entry shall include the following information:
(a) Date of the drill and training; and
(b) General description of the drill scenario and training topics.
Ans:- Fire fighting bulk $\displaystyle \small \mathrm{CO_2}$ :
$\displaystyle \small \mathrm{CO_2}$ H.P multi-cylinder type total flooding system is operated by using gas pressure. The operator in the control potion releases the gas from pilot cylinder in the $\displaystyle \small \mathrm{CO_2}$ room by means of a manual pull wire.
The $\displaystyle \small \mathrm{CO_2}$ from the cylinders act on the pistons of a gas release system. Movement of the piston actuates a series of levers attached to the cylinder head valves which by means of special cutter releases the gas to the manifold. The released gas then passes to a control valve at the control station and hence to the different heads in the protected space.
(a) Control cabinet door cannot be closed with control valve in open position.
(b) concise instruction must be provided at control position.
(c) Control cabinet door locked, key kept in glass box adjacent to control cabinet with a special hammer to shatter the glass attached.
$\displaystyle \small \mathrm{CO_2}$ Calculation
cylinder details:- Material - manganese steel
$\displaystyle \small \mathrm{CO_2}$ Contain - 45.4 kg
Cyl. Capacity - 68 litres
Filling Ratio - 0.67
Empty Cyl weight - 80 kg
Safety disc bursting pressure - 190 bar @ 63 deg cel.
Storage pressure - 52 bar @ 15 deg cel.
Test pressure - 250 bar
volume of free $\displaystyle \small \mathrm{CO_2}$ = 0.56 cubic meter per kg.
E.R gross volume = X without casing 40%
E.R gross volume = Y with casing 35%
Volume of free air bottles = Z
Volume of maximum cargo hold = A
As per regulation No. of bottle:-
E/R without casing $\displaystyle \small \mathrm{\frac{(X+Z)\times 0.40}{0.56\times 45.4}}$
E/R with casing $\displaystyle \small \mathrm{\frac{{(Y+Z)\times 0.35}}{0.56\times 45.4}}$
largest cargo hold $\displaystyle \small \mathrm{\frac{{A\times 0.3}}{0.56\times 45.4}}$
*Casing:- Horizontal area 40% or less of midway horizontal area between Tank top and lower casing part.
Z can be omitted in air bottle relief valve bursting disc discharge goes outside protected space
$\displaystyle \small \mathrm{CO_2}$ H.P multi-cylinder type total flooding system is operated by using gas pressure. The operator in the control potion releases the gas from pilot cylinder in the $\displaystyle \small \mathrm{CO_2}$ room by means of a manual pull wire.
The $\displaystyle \small \mathrm{CO_2}$ from the cylinders act on the pistons of a gas release system. Movement of the piston actuates a series of levers attached to the cylinder head valves which by means of special cutter releases the gas to the manifold. The released gas then passes to a control valve at the control station and hence to the different heads in the protected space.
(a) Control cabinet door cannot be closed with control valve in open position.
(b) concise instruction must be provided at control position.
(c) Control cabinet door locked, key kept in glass box adjacent to control cabinet with a special hammer to shatter the glass attached.
$\displaystyle \small \mathrm{CO_2}$ Calculation
cylinder details:- Material - manganese steel
$\displaystyle \small \mathrm{CO_2}$ Contain - 45.4 kg
Cyl. Capacity - 68 litres
Filling Ratio - 0.67
Empty Cyl weight - 80 kg
Safety disc bursting pressure - 190 bar @ 63 deg cel.
Storage pressure - 52 bar @ 15 deg cel.
Test pressure - 250 bar
volume of free $\displaystyle \small \mathrm{CO_2}$ = 0.56 cubic meter per kg.
E.R gross volume = X without casing 40%
E.R gross volume = Y with casing 35%
Volume of free air bottles = Z
Volume of maximum cargo hold = A
As per regulation No. of bottle:-
E/R without casing $\displaystyle \small \mathrm{\frac{(X+Z)\times 0.40}{0.56\times 45.4}}$
E/R with casing $\displaystyle \small \mathrm{\frac{{(Y+Z)\times 0.35}}{0.56\times 45.4}}$
largest cargo hold $\displaystyle \small \mathrm{\frac{{A\times 0.3}}{0.56\times 45.4}}$
*Casing:- Horizontal area 40% or less of midway horizontal area between Tank top and lower casing part.
Z can be omitted in air bottle relief valve bursting disc discharge goes outside protected space
$\displaystyle \small \mathrm{CO_2}$ flooding procedure:
(a) chief engineer to take charge of the operation.
(b) ETO to start emergency generator and put on load. Electric circuit to engine room from emergency switch board to be isolated.
(c) Activate the $\displaystyle \small \mathrm{CO_2}$ release alarm by opening control box door. It will trip E/R vent fans, purifier space exhaust, main engine auxiliary blower, engine control room A/C and power panel.
(d) All person report to muster station, ensure all engine room entrance are shut while leaving E/R and also on all decks in accommodation.
(e) take a head count and ensure all present or accounted for.
(f) confirm remote stop activated.
(g) 2nd engineer to trip all quick closing valves.
(h) 3rd engineer to start emergency fire pump and ensure proper operation and standby, confirm Isolating valve to E/R shut.
(i) Support squad to close all blower flaps, funnel flaps, skylight, All engine room and funnel doors.
(j) emergency squad to start boundary cooling as required.
(k) confirm engine room is sealed and final head count.
(l) Inform master and discharge $\displaystyle \small \mathrm{CO_2}$.
(a) chief engineer to take charge of the operation.
(b) ETO to start emergency generator and put on load. Electric circuit to engine room from emergency switch board to be isolated.
(c) Activate the $\displaystyle \small \mathrm{CO_2}$ release alarm by opening control box door. It will trip E/R vent fans, purifier space exhaust, main engine auxiliary blower, engine control room A/C and power panel.
(d) All person report to muster station, ensure all engine room entrance are shut while leaving E/R and also on all decks in accommodation.
(e) take a head count and ensure all present or accounted for.
(f) confirm remote stop activated.
(g) 2nd engineer to trip all quick closing valves.
(h) 3rd engineer to start emergency fire pump and ensure proper operation and standby, confirm Isolating valve to E/R shut.
(i) Support squad to close all blower flaps, funnel flaps, skylight, All engine room and funnel doors.
(j) emergency squad to start boundary cooling as required.
(k) confirm engine room is sealed and final head count.
(l) Inform master and discharge $\displaystyle \small \mathrm{CO_2}$.
(1) The master shall conduct sufficient fire drills to make sure that each crew member is familiar with his or her duties in case of a fire.
(2) Each fire drill must include:
(a) Summoning passengers on a vessel on an overnight voyage to muster or embarkation stations;
(b) Summoning the crew to report to assigned stations and to prepare for and demonstrate assigned duties;
(c) Instruction in the use and location of fire alarms, extinguishers, and any other firefighting equipment on board;
(3) Each fire drill must, as far as practicable, be conducted as if there were an actual emergency;
(4) Firefighting drills and training shall be logged or otherwise documented for review by the Coast Guard upon request. The drill entry shall include the following information:
(a) Date of the drill and training; and
(b) General description of the drill scenario and training topics.
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