4. LA EXENCIÓN DEL IMPUESTO SOBRE EL PATRIMONIO
4.2. Condiciones exigibles a las sociedades participadas para que queden exentas
00 COMPRESSOR ROOM 01 ELECTRIC MOTOR ROOM 02 ELECTRIC MOTOR ROOM AIRLOCK 03 TOWER PUMP COFFERDAM NO.1 04 TOWER PUMP COFFERDAM NO.2 05 TOWER PUMP COFFERDAM NO.3 06 TOWER PUMP COFFERDAM NO.4 07 GLYCOLE WATER AIR VENT 08 EMERGENCY FIRE PUMP ROOM 09 CARGO CONTROL ROOM
10 TOP OF ENGINE ROOM (ABOVE BOILER NO. 1) 11 TOP OF ENGINE ROOM (ABOVE BOILER NO. 2) 12 ENGINE ROOM FAN AIR INTAKE (AFT PORT) 13 ENGINE ROOM FAN AIR INTAKE (AFT STB.) 14 ENGINE ROOM FAN AIR INTAKE (FORE STB.) 15 AIR CONDITIONING STATION AIR INTAKE 16 GLYCOLED WATER EXPANSION TANK NO. 1 17 GLYCOLED WATER EXPANSION TANK NO. 2 18 STEAM CONDENSATE OBSERVATION TANK W.D.
19 STEAM CONDENSATE OBSERVATION TANK E.R.
20 MANIFOLD CRANE AIRLOCK
VENTED DUCTS SURROUNDING THE GAS PIPE TO THE BOILERS (OUTLET)
ENGINE ROOM FAN AIR INTAKE (FORE PORT)
ALARM 1 ALARM 2 DESIGNATION CHANNELS
MDXi No.1
Tank 4 Engine Room
A B C D
Tank 3 Tank 2 Tank 1
MDXi No.2
ALARM 1 ALARM 2 AL 1 AL 2 FAULT DESIGNATION
CHANNELS AL 1 AL 2 FAULT
PRIMARY INSULATION SPACE INFRARED ANALYSER NO. 1 AND NO. 3
PRIMARY INSULATION SPACE INFRARED ANALYSER NO. 2 AND NO. 3
TANK NO. 1
TANK NO. 2
TANK NO. 3
TANK NO. 4
FIRST PROGRAMMER COMBUREX IR
SECOND PROGRAMMER COMBUREX IR FAULT
RESET BUZZER LAMP TEST 00
01
5.3 Gas Detection System
The System is supplied by ‘ICARE’ France Societe Nouvelle and consists of
- 1 Infrared analyser system switchable from primary to secondary insulation spaces,
- 1 Infrared analyser system in Primary Insulation Space,
- 1 Infrared analyser system in Secondary Insulation Space,
- Catalytic combustion type detectors for gas detection in air for various spaces,
- Catalytic combustion type detectors for continuous measurement in boiler exhaust gas main,
- Catalytic combustion type detector for steam condensate,
- Control panel to be located in the CCR, - Repeater panels,
- Portable detectors & calibration equipment.
5.3.1 Infrared Gas Analyser System This gas detection equipment consists of
A Cabinet Housing 4 Independent Gas Detection Systems Based on 2 Different Principles of Detection
Systems Based on the Principle of Infrared Absorption for the Detection of Insulation Spaces - An independent system consisting of an IR Comburex programmer and an IREX infrared detector (scale 0-5% CH4 by volume) for detecting the primary insulation spaces in the 4 tanks.
This system has an associated sampling system driven by two pumps PA1 and PA2 and a gas circuit.
Each sampling line includes a BP 143 flame arrestor for the analysis channels and a BP 101 sampling nozzle for the “pure air” channel.
- An independent system consisting of an IR Comburex programmer and an IREX infrared detector (scale 0-40% CH4 by volume) for detecting the secondary insulation spaces in the 4 tanks.
This system has an associated sampling system driven by two pumps PA3 and PA4 and a gas circuit.
Each sampling line includes a BP 143 flame arrestor for the analysis channels and a BP 101 sampling nozzle for the “pure air” channel.
- An IREX detector (scale 0-100% CH4 by volume), common to the two IR Comburex programmers and switchable to one of the insulation spaces by a key switch, located on the cabinets front panel and marked “IREX 100% Vol. CH4”.
Operation of their Comburex and IREX Systems Each of the 2 IR Comburex programmers can thus display and manage the gas concentration output by the two IREX systems.
The IREX analyser that has been validated is identified on the IR Comburex programmer LCD by a symbol at the right of the LCD as follows:
- A1 indicates that the non-redundant IREX system is selected (IREX scale 0-5% by volume for the primary insulation space programmer and IREX scale 0-40%
by volume for the secondary insulation space programmer).
- A2 indicates that the redundant IREX system is selected (IREX scale 0-100% by volume for one of the programmers).
The symbols A1 and A2 are also used to distinguish each analyser when the user menu parameters (Alarm 1 & 2 thresholds, value of standard gas, etc.) are programmed and the alarm messages or faults are displayed.
To standardise the operation of the two programmers, the two push buttons on each IR Comburex have been eliminated and the functions they performed (i.e. stop horn and select channel) have therefore been reorganised as follows:
- The “stop horn” function for the two units is performed by the cabinet front panel push button marked
“RESET BUZZER”.
- The “select channel” function is available on the menu and can be accessed via the keyboard of each programmer by following the procedure below:
Press the “FUNCT” key:
- message “ACCESS CODE Val. or ”
Press the “ ” key:
- message “CALL CHAN. Val. or ” Press the “VALID” key:
- message Channel: X? or Val.”
Press one of the number keys, e.g. “1”:
- message “Call channel 1”
or press “VALID”:
- message “Call P A “
Repeat this procedure for each channel called up.
For details of the operation of these units, refer to their respective technical manuals (IR Comburex and IREX).
Operation of the Printer
The 40-column printer in this cabinet prints out the concentrations in the primary insulation space when the IREX 0-100% volume scale is switched in.
5.3.2 Catalytic Gas Analyser
Systems Based on the Principle of Catalytic combustion
- An independent system consisting of an MDXi unit and two SX202 explosimeter detectors for detection of the ventilated ducts surrounding the gas pipe to the boilers.
These detectors incorporate hardware for case assembling and are designated DTX 279
An independent system consisting of a MDXi unit and nineteen (19) SXY202 and SX202.H detectors for environment detection in various room and at specific spots.
These 19 detectors will be located as follows:
* 12 SX202 environment detectors in various rooms -designated DTX 285
* 4 SX202 detectors with hardware for flange assembling (AS 233 flange) for detection on the pipe casings.
* 3 SX202.H detectors fitted with a tracer ribbon, plus their accessories and mounting hardware, and classified as EEx d. These detectors are installed on the 2 glicolate water expansion tanks and on the steam condensate observation tank.
Operation of MDXi Units
The operations of these units is detailed in the MDXi technical manual.
Operation of the Cabinets Alarm Buzzer
A “synthesis” function groups together the alarms and faults of the systems described in § A and B above, and rings a buzzer and also illuminates a specific LED for each unit.
Isolating Valves Panel
A panel groups together the valves isolating each sampling line of the two insulation spaces
Connecting the Portable Detectors on the Lines Sampling the Insulation Spaces
Three-way valves are used to connect the portable detectors on each sampling line. It should be noted that, when one of these valves is switched for connecting a portable detector, the sampling flow to the cabinet is cut off. A flow fault will possibly be triggered if the channel in question is scanned at the same time by the cabinet.
These valves are designed for padlocking in the normal position, i.e. sampling to the cabinet.
Repeater Panel
Three alarm/fault repeater panels providing audible and visual warnings are located in:
- the engine room, - the wheel house, - the ECR.
The audible warning is generated by a buzzer which, after the occurrence of an event, must mandatorily be acknowledged locally, even if the alarm or fault has been acknowledged on the unit (cabinet).
5.3 Gas Detection System - Page 1 Issue: 1
Cargo Systems and Operating Manual LNG LERICI
point, CH4)
Portable Detectors
The ICARE portable detectors can analyse the following gases:
- Methane in air or in nitrogen, scale 0-100% LEL, i.e.
0-5% CH4 by volume.
This portable unit operates with dual dilution. It is equipped with a small flowmeter chassis for checking and adjusting the analysis sampling flows and the dilution flow from the air cylinder.
The injected airflow must be adjusted using the flowmeter cock to be the same as the analysis flow.
It is mandatory for these two flows to be equal (ball at the same height).
- Oxygen, scale 0-25% O2 by volume.
- Carbon Monoxide, scale 0-1000 ppm CO.
- Carbon Dioxide, scale 0-20% CO2 by volume.
The operation of these units is detailed in the ICARE technical manual.
5.3 Gas Detection System - Page 2 Issue: 1
5.4.1a De-Watering Pump Arrangement Issue: 1
Cargo Systems and Operating Manual LNG LERICI
Secondary Insulation Space Nitrogen Supply Column
to Secondary Barrier
Air Driven Water Pump