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Basic #GAS TANKER operation

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Kind: captions
Language: en

00:00:00.000
[Music]
00:00:07.530 00:00:07.540 guessing up inerting after drydock
00:00:16.109 00:00:16.119 inerting after docking this to be
00:00:18.430 00:00:18.440 carried out for the purpose to ensure
00:00:20.260 00:00:20.270 non flammable condition during
00:00:22.390 00:00:22.400 subsequent gassing up and to decrease
00:00:24.700 00:00:24.710 the dew point temperature this is
00:00:28.030 00:00:28.040 normally carried out by displacement
00:00:30.010 00:00:30.020 method for the purpose
00:00:32.740 00:00:32.750 oxygen concentration must be reduced to
00:00:36.100 00:00:36.110 below five percent by volume it is
00:00:39.759 00:00:39.769 better to first drive the cars with
00:00:41.799 00:00:41.809 Hanks machinery and piping system to
00:00:45.399 00:00:45.409 reduce the dew point dew point of the
00:00:48.790 00:00:48.800 cargo tank must be lower than the cargo
00:00:51.520 00:00:51.530 to be carried oxygen content of the
00:00:54.759 00:00:54.769 gases to be measured at regular
00:00:56.680 00:00:56.690 intervals at different gas sampling
00:00:59.139 00:00:59.149 points fitted on cargo trunk top and
00:01:01.750 00:01:01.760 cargo hold in nursing of other cargo
00:01:05.680 00:01:05.690 piping machinery cool down piping
00:01:08.800 00:01:08.810 company brocation piping and pump
00:01:11.650 00:01:11.660 discharge piping are to be carried out
00:01:14.140 00:01:14.150 hauling inert gas purging
00:01:19.890 00:01:19.900 00:01:22.600 00:01:22.610 neither nitrogen nor carbon dioxide the
00:01:26.209 00:01:26.219 main constituents of inert gas can be
00:01:28.609 00:01:28.619 condensed by a ship's relic plant this
00:01:32.660 00:01:32.670 is because the cargo temperature each is
00:01:35.060 00:01:35.070 above its critical temperature and is
00:01:37.460 00:01:37.470 therefore in condensable and removal of
00:01:42.529 00:01:42.539 inert gas from the cargo tank is
00:01:44.510 00:01:44.520 necessary cargo gas is sent into the
00:01:48.469 00:01:48.479 bottom of cargo tank through the main
00:01:50.569 00:01:50.579 liquid filling pipe and inert gas in the
00:01:53.570 00:01:53.580 tank is discharged to flare stack of the
00:01:56.510 00:01:56.520 shore and burn out gas exchange is
00:02:01.039 00:02:01.049 carried out gradually from the bottom of
00:02:02.839 00:02:02.849 the tank when content of cargo gas and
00:02:06.740 00:02:06.750 tank exceeds above 95% inert gas purge
00:02:10.789 00:02:10.799 or guessing up be thinning or cool down
00:02:16.280 00:02:16.290 operation cool down is necessary to
00:02:22.250 00:02:22.260 avoid excessive tank pressure during
00:02:24.080 00:02:24.090 bulk loading whole tank is cooled down
00:02:28.129 00:02:28.139 gradually before loading cooling liquid
00:02:32.599 00:02:32.609 is sprayed through the spray nozzles
00:02:34.759 00:02:34.769 that are fitted on the cool down piping
00:02:37.930 00:02:37.940 pay attention during the initial stage
00:02:40.580 00:02:40.590 of cool down as large amounts of oil gas
00:02:43.580 00:02:43.590 is generated in the tank resulting with
00:02:46.370 00:02:46.380 the tank pressure rising rapidly
00:02:50.170 00:02:50.180 temperature of each part of the tank is
00:02:52.610 00:02:52.620 to be kept equal as possible and the
00:02:55.250 00:02:55.260 differential temperature is to be kept
00:02:57.050 00:02:57.060 within 50 degrees centigrade the rate at
00:03:01.580 00:03:01.590 which you can't go tank can be cooled
00:03:03.199 00:03:03.209 without creating high thermal stress
00:03:06.210 00:03:06.220 depends on the design the containment
00:03:08.370 00:03:08.380 system reference should always be made
00:03:12.690 00:03:12.700 of the chips operating manual to
00:03:14.910 00:03:14.920 determine the allowable cooldown rate
00:03:17.390 00:03:17.400 00:03:21.730 00:03:21.740 cargo handling and monitoring system
00:03:25.120 00:03:25.130 arrangements of instruments cargo
00:03:27.470 00:03:27.480 control cargo control room consists of
00:03:34.090 00:03:34.100 cargo control console ballast console
00:03:41.460 00:03:41.470 cargo part gas detecting system
00:03:44.400 00:03:44.410 00:03:48.540 00:03:48.550 and accomodation part gas detecting
00:03:51.060 00:03:51.070 system
00:03:52.550 00:03:52.560 00:03:54.559 00:03:54.569 from the cargo console the chief and
00:03:57.380 00:03:57.390 duty officer controls and monitors the
00:04:00.380 00:04:00.390 whole operation of the cargo the cargo
00:04:04.550 00:04:04.560 console mainly consists on cargo tank
00:04:07.759 00:04:07.769 pressure gauges and recorders cargo tank
00:04:11.599 00:04:11.609 liquid level gauges main and emergency
00:04:15.949 00:04:15.959 cargo pump discharging pressure and amp
00:04:18.080 00:04:18.090 ere's cargo tank temperature indicator
00:04:23.719 00:04:23.729 and recorder each trunk top showing the
00:04:28.670 00:04:28.680 vowels and cargo pump status
00:04:30.660 00:04:30.670 00:04:33.270 00:04:33.280 general indication of cargo lines and
00:04:36.010 00:04:36.020 valves setup ESD control and alarm
00:04:41.170 00:04:41.180 indicator cargo Relic compressors
00:04:46.120 00:04:46.130 parameter low Decatur cargo instrument
00:04:55.510 00:04:55.520 room the instrument room contains the
00:04:59.469 00:04:59.479 starting panel for the main cargo pumps
00:05:03.480 00:05:03.490 emergency cargo pups
00:05:09.930 00:05:09.940 Relic compressor
00:05:11.730 00:05:11.740 00:05:15.800 00:05:15.810 and relic compressor and motor room fan
00:05:19.850 00:05:19.860 00:05:22.150 00:05:22.160 cargo tank control box cargo control box
00:05:27.409 00:05:27.419 situated on main deck at each cargo
00:05:29.870 00:05:29.880 trunk top consists of box a box B and
00:05:33.770 00:05:33.780 pump switch box
00:05:36.690 00:05:36.700 box a contains pressure indicators and
00:05:39.600 00:05:39.610 pressure switches for cargo tank fold
00:05:42.180 00:05:42.190 and relict liquid line the signals from
00:05:45.630 00:05:45.640 this box are transmitted to CCR box B
00:05:51.180 00:05:51.190 contains cargo tank level indicator and
00:05:53.760 00:05:53.770 cargo and emergency cargo pump discharge
00:05:55.950 00:05:55.960 pressure gauges pumps which box contains
00:06:00.690 00:06:00.700 main and emergency cargo pumps and
00:06:02.850 00:06:02.860 starting switches nearshore manifold
00:06:09.380 00:06:09.390 pressure gauges for liquid piping and
00:06:12.000 00:06:12.010 gas piping
00:06:13.540 00:06:13.550 00:06:16.870 00:06:16.880 thermometer for liquid piping pressure
00:06:20.960 00:06:20.970 transmitters to CCR for liquid and gas
00:06:23.720 00:06:23.730 piping each trunk top release liquid
00:06:33.440 00:06:33.450 line thermometer and thermal resistance
00:06:35.540 00:06:35.550 bulb for remote indication monitoring of
00:06:43.040 00:06:43.050 cargo parameters all cargo tanks holds
00:06:47.420 00:06:47.430 and other cargo related machinery
00:06:49.100 00:06:49.110 parameters and alarms can be monitored
00:06:51.950 00:06:51.960 from cargo and engine control room as
00:06:54.080 00:06:54.090 well as from wheelhouse
00:06:58.450 00:06:58.460 signals to these monitors are received
00:07:00.610 00:07:00.620 from various pressure transmitters
00:07:02.670 00:07:02.680 temperature sensors and level gauges
00:07:05.430 00:07:05.440 located at different parts of cargo
00:07:07.720 00:07:07.730 hangars associated equipment and piping
00:07:10.940 00:07:10.950 00:07:16.280 00:07:16.290 cargo system and equipment cargo piping
00:07:20.610 00:07:20.620 system as per international gas code
00:07:26.550 00:07:26.560 cargo pipelines are not allowed beneath
00:07:29.130 00:07:29.140 deck level on gas carriers therefore all
00:07:33.750 00:07:33.760 connections to tank must be taken
00:07:36.090 00:07:36.100 through the tank dome which penetrate
00:07:38.220 00:07:38.230 the main deck all other cargo pipelines
00:07:43.230 00:07:43.240 must be laid above debt level gas
00:07:47.760 00:07:47.770 carriers are normally fitted with liquid
00:07:49.650 00:07:49.660 and vapor manifolds at mid ship cargo
00:07:55.440 00:07:55.450 piping system consists of liquid line
00:08:00.560 00:08:00.570 vapor line relic liquid line also called
00:08:06.440 00:08:06.450 condensate line liquid and vapor
00:08:10.290 00:08:10.300 crossover liquid crossover header vapor
00:08:15.690 00:08:15.700 header relic liquid line header also
00:08:20.760 00:08:20.770 called condensate header relief line
00:08:28.520 00:08:28.530 high-pressure line booster discharge
00:08:31.320 00:08:31.330 line drain line inert gas line order
00:08:42.029 00:08:42.039 tank gas carriers cargo tanks are
00:08:48.000 00:08:48.010 constructed by taking into consideration
00:08:50.330 00:08:50.340 as to how the cargo will be carried
00:08:52.890 00:08:52.900 whether under pressurized or
00:08:54.960 00:08:54.970 refrigerated conditions or under a
00:08:57.360 00:08:57.370 combination of pressure and
00:08:58.650 00:08:58.660 refrigeration NYK ship management's
00:09:05.130 00:09:05.140 vessels are designed to carry LPG cargo
00:09:08.340 00:09:08.350 at atmospheric pressure under
00:09:10.530 00:09:10.540 refrigerated conditions each vessel is
00:09:18.180 00:09:18.190 fitted with four fully refrigerated to
00:09:20.280 00:09:20.290 type a prismatic self-supporting cargo
00:09:23.400 00:09:23.410 tanks the minimum service temperature
00:09:27.180 00:09:27.190 for each tank is minus 46 degrees
00:09:29.880 00:09:29.890 centigrade the maximum allowable
00:09:34.590 00:09:34.600 specific gravity of cargo is 0.61 grams
00:09:38.310 00:09:38.320 per cubic centimeter
00:09:43.579 00:09:43.589 each cargo tank is fitted with two
00:09:46.170 00:09:46.180 safety relief valves with a maximum
00:09:48.840 00:09:48.850 relief valve setting of -2 to 28
00:09:52.139 00:09:52.149 kilopascal gauge all the pipes and the
00:09:58.920 00:09:58.930 equipment two cargo tanks penetrate
00:10:01.650 00:10:01.660 through the trunk top relinquish action
00:10:07.410 00:10:07.420 plan fully refrigerated vessels are
00:10:12.840 00:10:12.850 fitted with relief action plan to
00:10:15.869 00:10:15.879 perform the following essential
00:10:17.280 00:10:17.290 functions relinquish flying cargo vapor
00:10:20.939 00:10:20.949 generated by flash evaporation vapor
00:10:23.999 00:10:24.009 displacement and boil off during
00:10:26.340 00:10:26.350 loadings maintaining cargo tank pressure
00:10:32.249 00:10:32.259 within the safe limit while at sea by
00:10:35.550 00:10:35.560 reel iqua fiying the boil off vapor
00:10:40.069 00:10:40.079 cooling down the cargo tanks and
00:10:42.360 00:10:42.370 associated pipelines before loading or
00:10:45.179 00:10:45.189 unloading
00:10:48.880 00:10:48.890 NYK ship management's lpg carriers are
00:10:52.510 00:10:52.520 fitted with five horizontal oil free and
00:10:55.060 00:10:55.070 water-cooled type cargo compressors
00:10:57.820 00:10:57.830 00:11:02.940 00:11:02.950 methanol from vessels are provided with
00:11:09.370 00:11:09.380 one methanol tank and/or one portable
00:11:12.790 00:11:12.800 methanol pump methanol is used as an
00:11:16.360 00:11:16.370 antifreeze on LPG vessels to remove
00:11:19.300 00:11:19.310 hydrate formation in cargo pump
00:11:21.490 00:11:21.500 lubrication system or in cargo tank
00:11:24.280 00:11:24.290 spray line nozzles to avoid
00:11:29.470 00:11:29.480 contamination of cargo methanol is to be
00:11:32.380 00:11:32.390 used only when hydrate formation has
00:11:34.660 00:11:34.670 been confirmed and company owner and
00:11:37.600 00:11:37.610 charters are informed cargo heater and
00:11:44.890 00:11:44.900 the booster pump some vessels are
00:11:49.600 00:11:49.610 provided with one or two booster pumps
00:11:51.790 00:11:51.800 and one cargo heater to unload cargo in
00:11:55.270 00:11:55.280 warm condition
00:12:01.170 00:12:01.180 you
00:12:05.110 00:12:05.120 fixin firefighting appliances dry
00:12:10.130 00:12:10.140 chemical powder system LPG ships are
00:12:15.500 00:12:15.510 provided with fix
00:12:23.730 00:12:23.740 00:13:07.850 00:13:07.860 and hose DCP nozzles are to be operated
00:13:11.249 00:13:11.259 by the actuate in bottles installed in
00:13:13.710 00:13:13.720 each hose unit
00:13:21.870 00:13:21.880 00:13:33.060 00:13:33.070 co2 system co2 fire extinguishing system
00:13:40.290 00:13:40.300 is used to
00:13:47.990 00:13:48.000 00:14:38.370 00:14:38.380 00:14:52.650 00:14:52.660 the chief officer is to confirm with
00:14:55.320 00:14:55.330 bridge that all personnel have evacuated
00:14:58.080 00:14:58.090 from the protected space and a headcount
00:15:00.300 00:15:00.310 is taken he then confirms with the
00:15:02.910 00:15:02.920 bridge to release co2 in the case that
00:15:06.990 00:15:07.000 co2 bottles are fully depleted during
00:15:09.300 00:15:09.310 the fire the fire main for co2 system is
00:15:12.720 00:15:12.730 operated
00:15:22.690 00:15:22.700 00:15:33.270 00:15:33.280 co2 is to be released only in the case
00:15:36.330 00:15:36.340 of actual fire nitrogen system the
00:15:44.790 00:15:44.800 vessel is provided with 10 bottles of
00:15:46.620 00:15:46.630 nitrogen gas
00:15:54.840 00:15:54.850 00:16:33.920 00:16:33.930 open main isolation valve
00:16:45.929 00:16:45.939 00:16:58.600 00:16:58.610 see
00:17:00.090 00:17:00.100 Spray system water spray system is
00:17:05.309 00:17:05.319 provided for fire prevention sheltering
00:17:07.490 00:17:07.500 cooling of the vessel and protection of
00:17:10.289 00:17:10.299 crew water spray system covers the
00:17:14.400 00:17:14.410 following areas trunk top
00:17:26.159 00:17:26.169 00:17:43.710 00:17:43.720 firestation wheelhouse and cargo control
00:17:47.470 00:17:47.480 room
00:17:50.190 00:17:50.200

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