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Figure 24 : Installation of Fire Damper Onboard
3.9 VACUUM BOX TESTING 3.9.1 Reference
Based on ABS Rules 3-7-15.11 1. Definition and Purpose : Vacuum Box Testing is a test to detect any leaks on the
structure. A box over a joint with leak indicating solution applied on the fillet or full penetration welds.
2. Method : by using air pressure 3. Details of Testing : 1 The air within the box is removed by an ejector to create a
vacuum of 0.20 bar 0.20 kgfcm
2
, 2.9 psi – 0,26 bar 0.27 kgfcm
2
, 3.8 psi inside the box. 2 Vacuum must to be applied before final coating.
4. Other Methode Testing : Air Testing. But for the deep tank, vacuum test is better
effective than air testing.
3.9.2 Procedure of Testing
1. Prepare a testing equipment such as soapy water and vacuum boxer. Vacuum boxer will be installed along with pressure gauge, pump, valve and hose connector.
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Figure 25 : Vacuum Box
2. To spray the soapy water to every boundary SIM joint.
A vacuum boxer with one of side opened and other side to made of glass will be affixed to every boundary SIM Joint that
has been sprayed with soapy water before.
Figure 26 : Spraying the Soapy Water to Boundary SIM Joint
3. Later, the air inside the vacuum boxer sucked by the pump. The air pressure is sucked by the pump in accordance with ABS Rules see at pressure gauge. Minus sign indicates if
the air was inhaled.
Figure 27 : Checking of Pressure Value
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4. The air pressure in the box become lower than before, and the air in the compartment tank higher pressure will be move toward vacuum boxer.
5. Surveyor will to checked for leaks on the SIM Joint. Leak characterized by the appearance of bubbles in the soapy water.
Figure 28 : Surveyor Examine the Leaks on SIM Joint
6. For to ensure the real leak, we must to spray soapy water again to
boundary SIM joint welding the suspected leak and check again.
3.9.3 Result and Conclusion of Survey
During the vacuum test process, Surveyor discovered a leak point on boundary SIM joint. Then, Surveyor asked to shipyard workers for to do reweld and UT Ultrasonic Test.
Before reweld, boundary SIM joint of the leak must be back gouging grindstone reweld
grindstone. Finally, Surveyor doing vacuum test again especially for the leak point.
Figure 29 : Comment From Surveyor
Figure 30 : Back Gouging, Reweld, and Grindstone
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Figure 31 : Return Vacuum Test Process After Reweld 3.10 MARPOL ANNEX VI ABOUT PREVENTION OF AIR POLLUTION
3.10.1 Sulphur Oxides SO
x
1. Sulphur content of any fuel oil used on board ships shall not exceed 4.5 mm 2. Requirements for within SO
x
emission control area example : Baltic Sea, sulphur content not exceed 1,5 mm
Figure 32 : Test Report Laboratory of Fuel Oil Sample
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3.10.2 Fuel Oil Quality
1. Fuel Oil requirement that the content of SOx and NOx in accordance with the previous rules, it does not contain inorganic, are not harmful to the ship and personnel, and does
not cause pollution 2. Not applicable for solid coal and nuclear fuel
3. A certificate of bunker and fuel oil samples are kept on board
Figure 33 : Receipt For Bunker Document and Samples Of The Fuel Stored On Board 3.10.3 Nitrogen Oxides NO
x
1. NOx is a generic term for the mono-nitrogen oxides NO and NO2 nitric oxide and nitrogen dioxide. NOx should not be confused with nitrous oxide N2O, which is a
greenhouse gas and has many uses as an oxidizer, an anaesthetic and a food additive. NOx is formed from the endothermic reaction of nitrogen and oxygen gases in the air
during combustion, especially at high temperatures, during the combustion of oil, coal or gas.
2. This regulation does not apply to emergency diesel engines, engines installed in lifeboats and any device or equipment intended to be used solely in case of emergency; and
3. This regulation shall apply to : a. Each diesel engine with a power output of more than 130 kW which is installed
on a ship constructed on or after 1 January 2000; and b. Each diesel engine with a power output of more than 130 kW which undergoes a
major conversion on or after 1 January 2000. 4. NO
x
Standard
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The operation of each diesel engine to which this regulation applies is prohibited, except when the emission of nitrogen oxides calculated as the total weighted emission of
NO2 from the engine is within the following limits: a. 17.0 gkW h when n is less than 130 rpm
b. 45.06 n
–0.2
gkW h when n is 130 or more but less than 2000 rpm c. 9.8 gkW h when n is 2000 rpm or more
where n = rated engine speed crankshaft revolutions perminute.
3.10.4 Ozone Depleting Substances
Purpose : to prevent the use of refrigerant that can damage or diluting the ozone layer
Figure 34 : Refrigerant
Ozone Substances
NODS
HFCs
R134A, R32, R125, R245CA
HFCs azeotropic
R507 HFCs approach
azeotropic R404A , R407B
ODS
Halon or BFCs
R13B1, R12B1, R1211, R1301,
R2402 CFC
R11, R12, R113, R114, R115
HCFCs
R22, R123, R124
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Figure 35 : Continuous - Refrigerant 3.11 INSULATION
3.11.1 Reference Base on SOLAS Part I Chapter II about Construction
– Fire protection, fire detection, and fire extinction
3.11.2 Type Of Insulation 1.
“A” Class Division
Requirements :
1. They are contructed of steel or other equivalent material
2. For bulkhead and deck
3. They are suitably stiffened 4. They are insulated with approved non-combustible materials such that the average
temperature of the unexposed side will not rise more than 140 C above the
original temperature , nor will the temperature, at any one point, including any joint,
rise more than 180 C above the original, within time listed below :
Class “A-60” 60 min
Class “A-30” 30 min
Class “A-15” 15 min
Class “A-0” 0 min
2. “B” Class Division
Requirements : 1. They are constructed of approved non-combustible materials and all materials used in
the construction and erection of B class divisions are non-combustible, with the
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exception that combustible veneers may be permitted provided they meet other appropriate requirements of this chapter
2. They are insulated with approved non-combustible materials such that the average temperature of the unexposed side will not rise more than 140
C above the original temperature
, nor will the temperature, at any one point, including any joint, rise more than 225
C above the original, within time listed below : Class “B-15”
15 min Class “B-0”
0 min
3. “C” Class Division
C class divisions are divisions constructed of approved non-combustible materials. They need meet neither requirements relative to the passage of smoke and flame nor
limitations relative to the temperature rise. Combustible veneers are permitted provided they meet the requirements of this chapter.
3.11.3 The division of type insulation
Installation of insulation on each adjacent rooms on the ship bulkhead or deck is depend on the type of the ship. Based on the SOLAS Chapter II-2 regulatio 9, type of vessel
is divided in 3 three :
1. Passenger Ship
A passenger ship is a ship which carries more than twelve passengers. Type of insulation divided in 2 two :
In ships carrying more than 36 passengers Table 2 – Table 3
Table 2 : Standard Insulation on Bulkhead For Passenger Ship More Than 36
Passenger
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Table 3 : Standard Insulation on Decks For Passenger Ship More Than 36 Passenger
In ships carrying less than 36 passengers Table 4 – Table 5
Table 4 : Standard Insulation on Bulkhead For Passenger Ship Less Than 36 Passenger
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Table 5 : Standard Insulation on Decks For Passenger Ship Less Than 36 Passenger
2. Cargo Ship Except Tanker
Cargo ship is any ship which is not a passenger ship Table 6 – Table 7
Table 6 : Standard Insulation on Bulkhead For Cargo Ship Except Tanker
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Table 7 : Standard Insulation on Decks For Cargo Ship Except Tanker
3. Tanker
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A tanker is a cargo ship constructed or adapted for the carriage in bulk of liquid cargoes of an inflammable nature Table 8
– Table 9 Table 8 : Standard Insulation on Bulkhead For Tanker
Table 9 : Standard Insulation on Decks For Tanker
1 Control Station Spaces containing emergency sources of power and lighting.
Wheelhouse and chartroom. Spaces containing the ships radio equipment.
Fire control stations.
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Control room for propulsion machinery when located outside the machinery space. Spaces containing centralized fire alarm equipment.
2 Corridors Corridors and lobbies.
3 Accommodation spaces Accommodation spaces are those spaces used for public spaces, corridors, lavatories,
cabins, offices, hospitals, cinemas, game and hobby rooms, barber shops, pantries containing no cooking appliances and similar spaces.
4 Stairways Interior stairway, lifts, totally enclosed emergency escape trunks, and escalators other
thanthose wholly contained within the machinery spaces and enclosures thereto. In this connection, a stairway which is enclosed only at one level shall be regarded as part of the
space from which it is not separated by a fire door. 5 Service spaces low risk
Lockers and store-rooms not having provisions for the storage of flammable liquids and having areas less than 4 m
2
and drying rooms and laundries. 6 Machinery spaces of category A
Machinery spaces of category A are those spaces and trunks to such spaces which contain either :
Internal combustion machinery used for main propulsion; Internal combustion machinery used for purposes other than main propulsion
where such machinery has in the aggregate a total power output of not less than 375 kW; or
any oil-fired boiler or oil fuel unit, or any oil-fired equipment other than boilers, such as inert gas generators, incinerators, etc.
7 Other machinery spaces Electrical equipment rooms auto-telephone exchange, air-conditioning duct spaces.
Spaces as defined in regulation 3.30, excluding machinery spaces of category A. Machinery spaces are machinery spaces of category A and other spaces containing propulsion
machinery, boilers, oil fuel units, steam and internal combustion engines, generators and major electrical machinery, oil filling stations, refrigerating, stabilizing, ventilation and air
conditioning machinery, and similar spaces, and trunks to such spaces.
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8 Cargo pump – rooms
Spaces containing cargo pumps and entrances and trunks to such spaces. 9 Service spaces high risk
Galleys, pantries containing cooking appliances, saunas, paint lockers and store- rooms having areas of 4 m
2
or more, spaces for the storage of flammable liquids, and workshops other than those forming part of the machinery spaces.
10 Open decks Open deck spaces and enclosed promenades having little or no fire risk. To be
considered in this category, enclosed promenades shall have no significant fire risk, meaning that furnishings shall be restricted to deck furniture. In addition, such spaces shall be
naturally ventilated by permanent openings. Air spaces the space outside superstructures and deckhouses.
3.11.4 Result and Conclusion of Survey
The all OSV at Marcopolo Shipyard which are currently still in progress was designed under SPS Code 2008_MSC 26682 and the total crews are 36 persons, then table 9.5 and
9.6 of SOLAS II-2Reg. 9 is applied based on SPS CodeChapter 6 for structural fire protection drawing approval process and survey reference.
CHAPTER 6 FIRE PROTECTION
6.1 For ships carrying more than 240 person on board, the requirements of chapter II-2of SOLAS for passenger ship carrying more than 36 passenger should be applied 9.1 dan 9.2
6.2 For ship carrying more than 60 but not more than 240 persons on board, the requirements of chapter II-2 of SOLAS for passenger ship carrying not more than 36
passengers should be applied. 9.3 dan 9.4
6.3 For ships carrying not more than 60 persons on board, the requirements of chapter II-2 of SOLAS for cargo ships should be applied 9.5 dan 9.6
