Cargo Operating Manual

Full text

(1)BERGESEN Cargo Operating Manual. LNGC BERGE EVERETT (H2212).

(2) LNGC BERGE EVERETT Introduction.....................................................................................................3 Cargo Machinery Symbols and Colour Scheme...........................................4 Abbreviation....................................................................................................5 Part 1 Cargo and Ballast System ............................................................. 1 - 1 1.1 Cargo Piping System...................................................................... 1 - 2 1.1.1 Liquid, Vapour, Spray Pipes................................................ 1 - 2 1.1.2 Gas Line (One Tank Operation) .......................................... 1 - 4 1.1.3 Fuel Gas and Vent Pipes...................................................... 1 - 4 1.1.4 Inerting/Aeration Pipes ........................................................ 1 - 4 1.2 Cargo Pumps.................................................................................. 1 - 6 1.2.1 Main Cargo Pumps .............................................................. 1 - 8 1.2.2 Stripping/Spray Pumps ...................................................... 1 - 10 1.2.3 Emergency Cargo Pump .................................................... 1 - 12 1.3 Cargo Compressors...................................................................... 1 - 14 1.3.1 HD Compressors................................................................ 1 - 14 1.3.2 LD Compressors ................................................................ 1 - 18 1.4 Boil-Off/Warm Up Heater ........................................................... 1 - 22 1.5 LNG Vaporizer ............................................................................ 1 - 24 1.6 Forcing Vaporizer ........................................................................ 1 - 26 1.7 Vacuum Pumps ............................................................................ 1 - 28 1.8 Custody Transfer System............................................................. 1 - 30 1.8.1 Radar-Based Level Gauge ................................................. 1 - 30 1.8.2 System Readout and Control ............................................. 1 - 32 1.8.3 Float Level Gauge.............................................................. 1 - 40 1.8.4 Trim-List Indicator ............................................................ 1 - 42 1.9 Nitrogen Production System ........................................................ 1 - 44 1.10 Inert Gas and Dry Air System.................................................... 1 - 46 1.11 Gas Detection System ................................................................ 1 - 48 1.12 Cargo and Ballast Valve Control ............................................... 1 - 50 1.12.1 Cargo and Ballast Control System................................... 1 - 50 1.12.2 Emergency Shutdown System ......................................... 1 - 54 1.12.3 Ship Shore Link ............................................................... 1 - 56 1.12.4 Mooring Load Monitoring System .................................. 1 - 60 1.13 Relief Systems ........................................................................... 1 - 62 1.13.1 Cargo Tank Relief Valves................................................ 1 - 62 1.13.2 Insulation Space Relief Valves ........................................ 1 - 62 1.13.3 Pipe Relief Valves ........................................................... 1 - 62 1.14 Ballast Level and Draft Indicating System ................................ 1 - 64 1.15 Fuel Oil Bunkering and Transfer Systems ................................. 1 - 66. Cargo Operating Manual. Part 2 Cargo Auxiliary and Deck System ............................................... 2 - 1 2.1 Temperature Monitoring System ................................................... 2 - 2 2.2 Insulation Space Nitrogen Control System .................................... 2 - 4 2.3 Cofferdam Glycol Heating System ................................................ 2 - 6 2.3.1 Hull Ventilation ................................................................. 2 - 10 2.4 Fire Fighting System .................................................................... 2 - 12 2.4.1 Fire Protection and Wash Deck.......................................... 2 - 12 2.4.2 Water Spray System........................................................... 2 - 14 2.4.3 Dry Powder System ........................................................... 2 - 16 2.4.4 CO2 System ....................................................................... 2 - 18 2.4.5 Fire Detection System........................................................ 2 - 20 2.5 Auxiliary FW Cooling System..................................................... 2 - 22 2.6 Steam Condensate System ........................................................... 2 - 23 2.7 Bilge and Scupper System ........................................................... 2 - 26 2.8 Instrument Air System ................................................................. 2 - 27 2.9 Emergency Air System ................................................................ 2 - 28 Part 3 Cargo Operations........................................................................... 3 - 1 3.1 Insulation Space Tests.................................................................... 3 - 1 3.2 Post Dry Dock Operation ............................................................... 3 - 3 3.2.1 Insulation Space Inerting ..................................................... 3 - 3 3.2.2 Drying Cargo Tanks............................................................. 3 - 7 3.2.3 Inerting Cargo Tanks ........................................................... 3 - 9 3.2.4 Gassing-up Cargo Tanks.................................................... 3 - 11 3.2.5 Cooling Down Cargo Tanks .............................................. 3 - 15 3.3 Ballast Passage............................................................................. 3 - 17 3.3.1 Cooling Down Tanks Prior to Arrival................................ 3 - 19 3.3.2 Spraying During Ballast Voyage ....................................... 3 - 21 3.4 Loading ........................................................................................ 3 - 23 3.4.1 Preparations for Loading.................................................... 3 - 23 3.4.2 Cargo Lines Cool Down .................................................... 3 - 23 3.4.3 To Load Cargo with Vapour Return to Shore .................... 3 - 27 3.4.4 Nitrogen Set-up During Loading ....................................... 3 - 31 3.4.5 De-Ballasting ..................................................................... 3 - 33 3.5 Loaded Voyage with Boil-Off Gas Burning ................................ 3 - 35 3.5.1 Normal Boil-Off Gas Burning ........................................... 3 - 35 3.5.2 Forced Boil-Off Gas Burning ............................................ 3 - 37 3.6 Discharging with Gas Return from Shore .................................... 3 - 39 3.6.1 Preparations for Unloading ................................................ 3 - 39 3.6.2 Liquid Line and Arm Cooldown before Discharging ........ 3 - 42 3.6.3 Discharging ........................................................................ 3 - 44 3.6.4 Ballasting ........................................................................... 3 - 47. 1. 3.7 Pre-Dry Dock Operations............................................................. 3 - 49 3.7.1 Stripping and Line Draining............................................... 3 - 49 3.7.2 Tank Warm Up................................................................... 3 - 51 3.7.3 Inerting ............................................................................... 3 - 53 3.7.4 Aeration.............................................................................. 3 - 55 Part 4 Integrated Automation System (IAS)........................................... 4 - 1 4.1 General ........................................................................................... 4 - 3 4.2 Hardware ........................................................................................ 4 - 6 4.3 Operation........................................................................................ 4 - 7 Part 5 Emergency Procedures .................................................................. 5 - 1 5.1 Vapour Leakage ............................................................................. 5 - 2 5.2 Liquid Leakage............................................................................... 5 - 4 5.3 Water Leakage to Barrier Space..................................................... 5 - 7 5.4 Fire and Emergency Breakaway..................................................... 5 - 7 5.5 Emergency Cargo Pump Installation.............................................. 5 - 9 5.6 One Tank Operation ..................................................................... 5 - 11 5.6.1 Warm Up (No.3 Tank) ....................................................... 5 - 11 5.6.2 Inerting ............................................................................... 5 - 13 5.6.3 Aeration.............................................................................. 5 - 15 5.6.4 Drying and Inerting ............................................................ 5 - 17 5.7 Ship to Ship Transfer.................................................................... 5 - 18 5.8 Jettisoning of Cargo ..................................................................... 5 - 19 Part 6 Design Concept of the Vessel......................................................... 6 - 1 6.1 Principal Particulars ....................................................................... 6 - 1 6.2 Rules and Regulations .................................................................... 6 - 7 6.3 Design Concept of the Cargo System............................................. 6 - 9 6.3.1 Cargo Containment System Principle .................................. 6 - 9 6.3.2 Membrane Cargo Containment .......................................... 6 - 10 6.3.3 Deterioration or Failure...................................................... 6 - 15 6.4 Hazardous Areas and Gas Dangerous Zone ................................. 6 - 17 Part 7 Properties of LNG.......................................................................... 7 - 1 7.1 Physical Properties, Composition and Characteristics of LNG...... 7 - 1 7.2 Characteristics of LNG................................................................... 7 - 4 7.2.1 Flammability of Gases ......................................................... 7 - 4 7.2.2 Supplementary Characteristics ............................................. 7 - 5 7.2.3 Avoidance of Cold Shock to Metal ...................................... 7 - 6 7.3 Health Hazards ............................................................................... 7 - 7. Index.

(3) LNGC BERGE EVERETT Introduction General Although the ship is supplied with Shipbuilder’s plans and manufacturer’s instruction books, there is no single handbook which gives guidance on operating complete systems, as distinct from individual items of machinery. The purpose of this manual is to fill some of the gaps and to provide the ship’s officers with additional information not otherwise available on board. It is intended to be used in conjunction with the other plans and instruction books already on board and in no way replaces or supersedes them. In addition to containing detailed information of the machinery and related systems, the machinery manual provided by each vendor, contains safety procedures, and procedures to be observed in emergencies and after accidents. Used in conjunction with the BERGESEN SMS MANUAL, this information is designed to ensure the safety and efficient operation of the ships. Quick reference to the relevant information is assisted by division of the manual into Parts and Sections, detailed in the general list of contents on the preceding pages. Reference is made in this book to appropriate plans or instruction books. For other information refer to: 1) Books and Publications contained in the SMS Directory 2) SMS Manual In many cases the best operating practice can only be learnt by experience. Where the information in this manual is found to be inadequate or incorrect, details should be sent Hull Piping Design Team of DSME so that revisions may be made to manuals of other ships of the same class. Safe Operation The safety of the ship depends on the care and attention of all on board. Most safety precautions are a matter of common sense and good housekeeping and are detailed in the various manuals available onboard. However, records show that even experienced operators sometimes neglect safety precautions through over familiarity and the following basic rules must be remembered at all times. 1. Never continue to operate any machine or equipment which appears to be potentially unsafe or dangerous and always report such a condition immediately.. Cargo Operating Manual. 4. Never underestimate the fire hazard of petroleum products, whether fuel oil or cargo vapour.. Notices The following notices occur throughout this manual:. 5. Never start a machine remotely from the control room without checking visually if the machine is able to operate satisfactorily. In the design of equipment and machinery, devices are included to ensure that, as far as possible, in the event of a fault occurring, whether on the part of the equipment or the operator, the equipment concerned will cease to function without danger to personnel or damage to the machine. If these safety devices are neglected, the operation of any machine is potentially dangerous. Description The concept of this Cargo Operating Manual is based on the presentation of operating procedures in the form of one general sequential chart (algorithm) which gives a step-by-step procedure for performing operations.. Warning Warnings are given to draw reader’s attention to operation where danger to life or limb may occur. ! Caution Cautions are given to draw reader’s attention to operations where danger to life or limb may occur. Note ! Notes are given to draw reader’s attention to points of interest or to supply supplementary information.. The manual consists of introductory sections which describe the systems and equipment fitted and their method of operation related to a schematic diagram where applicable. This is then followed where required by detailed operating procedures for the system or equipment involved. The overview of machinery operations, consists of a basic operating algorithm which sets out the procedure for operations from preparing the plant for operation from dead ship condition, to shutting down the plant in readiness for dry dock. The relevant illustration and operation section number is located on the right hand side of each box. Each machinery operation consists of a detailed introductory section which describes the objectives and methods of performing the operation related to the appropriate flow sheet which shows pipelines in use and directions of flow within the pipelines. Details of valves which are OPEN during the different operations are provided in text for reference. The ‘valves’ and ‘fittings’ identifications used in this manual are the same as those used by LNGC BERGE EVERETT. Illustrations. 2. Make a point of testing all safety equipment and devices regularly.. All illustrations are referred to in the text and are located either in text where sufficiently small or above the text, so that both the text and illustration are accessible when the manual is laid face up. When text concerning an illustration covers several pages the illustration is duplicated above each page of text.. 3. Never ignore any unusual or suspicious circumstances, no matter how trivial. Small symptoms often appear before a major failure occurs.. Where flows are detailed in an illustration these are shown in colour. A key of all colours and line styles used in an illustration is provided on the illustration. Details of colour coding used in the illustrations are given in the colour scheme. Symbols given in the manual adhere to international standards and keys to the symbols used throughout the manual are given on the following pages.. 3. Introduction.

(4) LNGC BERGE EVERETT. Cargo Operating Manual. Cargo Machinery Symbols and Colour Scheme. STANDARD SYMBOL VALVE, COCK, STRAINER, PIPE FITTING & INSTRUMENT SYMBOL. DESCRIPTION. SYMBOL. DESCRIPTION. STANDARD SYMBOL VALVE, COCK, STRAINER, PIPE FITTING & INSTRUMENT SYMBOL. DESCRIPTION. SYMBOL. DESCRIPTION. GLOBE STOP STR. COCK 2-WAY. STRAINER SIMPLEX STR. REDUCER. GLOBE STOP ANGLE. COCK 3-WAY T-TYPE. STRAINER SIMPLEX LA. EJECTOR. GLOBE SDNR STR. COCK 3-WAY L-TYPE. STRAINER SIMPLEX LB. HAND PUMP. GLOBE SDNR ANGLE. COCK 4-WAY. MUD BOX STR. OFF PAGE CONNECTOR. GATE RISING. PRESS. CONTROL REDUCING. MUD BOX ANG. CENTRIFUGAL PUMP. GATE NON RISING. QUICK CLOSING STR. ROSE BOX. SCUPPER PIPE. FLAP CHECK. QUICK CLOSING ANG. STEAM STRIP W/DRAIN VALVE. DECK STAND NORMAL. SWING CHECK. FLOW CONT. 2-WAY DISC/DIA.. SOUNDING CAP S/C WEIGHT. DECH STAND LOCAL HYD.. LIFE CHECK STR. REMOTE HYD. B' FLY WAFER. SOUNDING CAP NORMAL. FULL DISCH. OVBD. LIFE CHECK ANGLE. REMOTE HYD. B' FLY FLANGE. SOUNDING CAP DECK PIECE. NOT CONN. CROSSING PIPE. BALL CHECK WITHOUT SPRING. REMOTE PNEU. B' FLY LUG. FILLING CAP. CONNECTED CROSSING PIPE. BALL CHECK WITH SPRING. REMOTE PNEU. B' FLY WAFER. AIR PIPE GOOSE NECK. BOSS. B' FLY LUG. REMOTE PNEU. B' FLY FLANGE. AIR VENT FLOAT A SCR. BOSS WITH PLUG. B' FLY WAFER. REMOTE ELEC. F' FLY LUG. AIR VENT FLOAT A. EXPANSION BEND PIPE. B' FLY FLANGE. REMOTE ELEC. B' FLY WAFER. AIR VENT FLOAT B SCR. HOSE CONN. GLOBE STR. REMOTE ELEC. B' FLY FLANGE. AIR VENT FLOAT B. PRESSURE INDICATER. HOSE CONN. GLOBE ANG. SURFACE DROP. COUPLING DRESSER. COMPOUND GAUGE. SAFETY STR. PRESSURE VACUUM. COUPLING SLEEVE. PRESSURE TRANSMITTER. SAFETY ANG. PRESS. VACUUM HIGH VELOCITY. COUPLING FLANGED DRESSER. THERMOMETER. SELF CLOSING STR SPRING. PRESS. VACUUM BREAKER. SPECTACLE FLANGE. LEVEL ALARM HIGH. SELF CLOSING ANG SPRING. GAS FREEING COVER. BLANK FLANGE. LEVEL ALARM LOW. NEEDLE STR. FLAME ARRESTER. BELL MOUTH. NEEDLE ANG. ORIFICE PLATE. SPOOL PIECE. NEEDLE 3-WAY TEST. ORIFICE VALVE. CARGO LIQUID LINE F.W. LINE CONDENSATE LINE. STRIPPING/SPRAY LINE. GAS LINE. STEAM LINE. N2 LINE DIESEL OIL LINE. INERT GAS LINE. L.O LINE. F.O LINE. GLYCOL WATER LINE. F. GAS FLOW METER. SEA WATER LINE BILGE LINE. CLOSE. HYD. OIL LINE. AIR LINE. OPEN. VAPOUR LINE. 4. Symbol.

(5) LNGC BERGE EVERETT Abbreviation ABNOR ABP ABS ABS AC ACB ACC ACCOM ACCU ACK ACM ACT ADJ ADV AE AFT AHD AHU ALM ALS AMP APT AST ATM ATOM AUS AUTO AUX AVAIL B/ATOM B/L B/THR BALL BATT BC BGB BH TK BHD BLK BLR BLWR BMS BNR BO BO/WU BOG BOSUN ST BRG BW BWC BZ CAB CCC CCR CENT CFW CIRC CL CLK CLR CMR CNR CO2 COFF COM COMP COMP RM COND CONDUCT CONT COOL COUNT CP CSBD CSL CSW CTS CUR CW. ABNORMAL AFTER BOTTOM PORT AFTER BOTTOM STBD ABSOLUTE AIR CONDITIONER AIR CIRCUIT BREAKER AUTOMATIC COMBUSTION CONTROL ACCOMMODATION ACCUMULATOR ACKNOWLEDGE AFTER CENTRAL MIDDLE ACTIVATE ADJUSTING ADVANCE AUXILIARY ENGINE AFTER AHEAD AIR HANDLING UNIT ALARM AFTER LOWER STBD AMPERE AFT PEAK TANK ASTERN ATMOSPHERE ATOMISING AFTER UPPER STBD AUTOMATIC AUXILIARY AVAILABLE BURNER AUTOMIZING BALLAST / LADEN BOW THRUSTER BALLAST BATTERY BOTTOM CENTRAL BOILER GAUGE BOARD BILGE HOLDING TANK BULKHEAD BLOCK BOILER BLOWER BURNER MANAGEMENT SYSTEM BURNER BOIL-OFF BOIL-OFF / WARM-UP BOIL OFF GAS BOSUN STORE BEARING BILGE WELL BRIDGE WING CONSOLE BUZZER CABINET CARGO CONTROL ROOM CONSOLE CARGO CONTROL ROOM CENTRAL / CENTRIFUGAL COOLING FRESH WATER CIRCULATING CLOSE CLOCK COOLER CARGO MOTOR ROOM CORNER CARBON DIOXIDE COFFERDAM COMMON COMPRESSOR CARGO COMPRESSOR ROOM CONDENSATE / CONDENSER CONDUCTIVITY CONTROL COOL, COOLING COUNT, COUNTER CONTROL PANEL CARGO SWITCHBOARD CONSOLE COOLING SEA WATER CUSTODY TRANSFER SYSTEM CURRENT COOLING WATER. CYL DAMP DB DEARER DEL DET DG DIFF DIS DISCON DK DO DP DRK W DRN DRV DRY DSHTR DW ECC ECONM ECRC EDR EDSHTR EDUCT EER EH EHQ ELEV EMCY EMR ENG ENGAGE EQ ER ESBD ESD ESDS EXH EXP EXT EXTR F/VPR FCL FCLE FCU FCV FDB FDF FDWC FE FEW FG FLP FO FORC FPT FREQ F-ST FUNC FUP FW FWC FWD GACP GEN GMS GRAV GRP GS GUS GVNOR GW H HAND HD HDR HFO HH HP HPM. Cargo Operating Manual HPT HSC HTR HYD IAS IG IGG IGV IN INCIN INCOM IND INH INJECT INSP INSUL INTERM INTLK IR ISO L/VPR LCV LD LDO LIQ LL LO LP LPSG LPT LSC LTG LVL LWR M/COND M/LOADER M/WHEEL MAN MANI MANO MB MFWPT MG MGPS MID MSBD MT MV N2 NAV NOR NOZL O/C O2 OMD OP OUT OVBD OVFL OVLD OVRD OW SEP P P/WAY PB PCV PD PIST PKG PNEUM PNL POS PP PPTW PRES PRI PROV PRP PSU PURIF PWR. CYLINDER DAMPER DOUBLE BOTTOM / DISTRIBUTION BOARD DEAERATOR DELIVERY DETECTOR / DETECTION DIESEL GENERATOR DIFFERENTIAL DISCHARGE DISCONNECT DECK DIESEL OIL DIFFERENTIAL PRESS DRINKING WATER DRAIN DRIVE, DRIVING DRYER DESUPERHEATED SYSTEM HEATER DISTILLED WATER ENGINE CONTROL ROOM CONSOLE EXHAUST GAS ECONOMIZER ENGINE CONTROL ROOM ELECTRIC DISTRIBUTING PANEL ROOM EXTERNAL DESUPERHEATED DEUCTOR ELECTRIC EQUIPMENT ROOM EXTEREMELY HIGH EMERGENCY HEADQUARTER ELEVATOR EMERGENCY ELECTRIC MOTOR ROOM ENGINE ENGAGED EQUIPMENT ENGINE ROOM EMERGENCY SWITHBOARD EMERGENCY SHUT DOWN EMERGENCY SHUT DOWN SYSTEM EXHAUST EXPANSION EXTENSION EXTRACTOR FORCING VAPOURIZER FWD CENTRAL LOWER FORECASTLE FWD CENTRAL UPPER FLOW CONTROL VALVE FOREWARD DEEP BALLAST FORCED DRAFT FAN FEED WATER CONTROL FLAME EYE FINISHED WITH ENGINE FUEL GAS FWD LOWER PORT FUEL OIL / FIBER OPTIC FORCING FORWARD PEAK TANK FREQUENCY FOLLOW AUTO START FUNCTION FWD UPPER PORT FRESH WATER FRESH WATER CONTROL FORWARD GENERATOR AUTO CONTROL PANEL GENERATOR GAS MANAGEMENT SYSTEM GRAVITY GROUP GENERAL SERVICE GLOBAL USER STATION GOVERNOR GLYCOL WATER HIGH HANDLE / HANDLING HIGH DUTY HEADER HEAVY FUEL OIL HIGH-HIGH HIGH-PRESSURE HIGH-PREFORMANCE PROCESS MANAGER. 5. HIGH PRESSURE TURBINE HIGH SEA CHEST HEATER HYDRAULIC INTEGRATED AUTOMATION SYSTEM INERT GAS INERT GAS GENERATOR INLET GUIDE VANE INLET INCINERATOR INCOMMING INDICATION INHIBIT INJECTIION INSPECTION INSULATION INTERMEDIATE INTERLOCK INFRA-RED ISOLATING LNG VAPOURIZER LEVEL CONTROL VALVE LOW DUTY LIGHT DIESEL OIL LIQUID LOW-LOW LUBRICATION OIL LOW PRESSURE LOW PRESSURE STEAM GENERATOR LOW PRESS TURBINE LOW SEA CHEST LIGHTING LEVEL LOWER MAIN CONDENSER MANUAL LOADER MAIN WHEEL MANUAL MANIFOLD MANOUVERING MAIN BOILER MAIN FEED WATER PUMP TURBINE MASTER GAS MARINE GROWTH PREVENTING SYSTEM MIDDLE MAIN SWITCHBOARD MAIN TURBINE MANOEUVERED VALUE NITROGEN NAVIGATION NORMAL NOZZLE OPEN/CLOSE OXYGEN OIL MIST DETECTOR OPEN OUTLET OVERBOARD OVERFLOW OVERLOAD OVERRIDE OILY WATER SEPARATOR PORT PASSAGE WAY PUSH BUTTON PRESSURE CONTROL VALVE PIPE DUCT PISTON PACKAGE PNEUMATIC PANEL POSITION PUMP PUMP TOWER PRESSURE PRIMARY / PRIMING PROVISION PROVISION REFRIGERATION PLANT POWER SUPPLY UNIT PURIFIER POWER. RECIRC REDUC REF REG REGUL RESV RIO RM RPB RPM RTN RVI S S/D S/S S/T SAH SAL SB SC SCRUB SDC SEC SEL SEP SEQ SERV SETTL SG SHTR SIN PH SOL SP SPR ST STBY STC STM STOR STR STRIP SUC SUPP SV SVB SW SWBD SYNC SYS T/C TC TCV TEMP TG THR TK TOPP UP TP TPS TRANS TRBL TURN GEAR UPP UPS V V/F VAC VAP VIB VISC VL VPR VRC VV W WH WHC WIND WO WS WU. RECIRCULATING REDUCTION REFRIGERATION TYPE REGENERATION TYPE REGULATOR RESERVE REMOTE IO ROOM REMOTE PUSH BUTTON REVOLUTIONS PER MINUTE RETURN ROTOR VIBRATION INDICATION STARBOARD SCHEMATIC DIAGRAM SHIP SIDE STERN TUBE STEAM AIR HEATER SALINITY SOOT BLOWER SEA CHEST SCRUBBER STEAM DUMP CONTROL SECONDARY SELECT SEPARATOR SEQUENCE SERVICE SETTLING STEERING GEAR SUPERHEATED STEAM HEATER SINGLE PHASE SOLENOID SPACE SPRAY START STAND BY STEAM TEMPERATURE CONTROL STEAM STORAGE STARTER STRIPPING SUCTION SUPPLY SOLENOID VALVE SOLENOID VALVE BOX SEA WATER SWITCHBOARD SYNCHRONIZE SYSTEM TURBOCHARGER THERMOCOUPLE TEMPERATURE CONTROL VALVE TEMPERATURE TURBO GENERATOR THRUSTER TANK TOPPING UP TRIP TANK PROTECTION SYSTEM TRANSMITTER / TRANSFER TROUBLE TURNING GEAR UPPER UNINTERRUPTED POWER SUPPLY VOLTAGE VOLTAGE / FREQUENCY VACUUM VAPOUR VIBRATION VISCOSITY VERY LOW VAPOURIZER VALVE REMOTE CONTROL VALVE WATER WHEELHOUSE WHEELHOUSE CONSOLE WINDING WASTE OIL WORKSHOP WARM UP. Abbreviation.

(6) Introduction.....................................................................................................3 Cargo Machinery Symbols and Colour Scheme...........................................4 Abbreviation....................................................................................................5 Part 1 Cargo and Ballast System ............................................................. 1 - 1 1.1 Cargo Piping System...................................................................... 1 - 2 1.1.1 Liquid, Vapour, Spray Pipes................................................ 1 - 2 1.1.2 Gas Line (One Tank Operation) .......................................... 1 - 4 1.1.3 Fuel Gas and Vent Pipes...................................................... 1 - 4 1.1.4 Inerting/Aeration Pipes ........................................................ 1 - 4 1.2 Cargo Pumps.................................................................................. 1 - 6 1.2.1 Main Cargo Pumps .............................................................. 1 - 8 1.2.2 Stripping/Spray Pumps ...................................................... 1 - 10 1.2.3 Emergency Cargo Pump .................................................... 1 - 12 1.3 Cargo Compressors...................................................................... 1 - 14 1.3.1 HD Compressors................................................................ 1 - 14 1.3.2 LD Compressors ................................................................ 1 - 18 1.4 Boil-Off/Warm Up Heater ........................................................... 1 - 22 1.5 LNG Vaporizer ............................................................................ 1 - 24 1.6 Forcing Vaporizer ........................................................................ 1 - 26 1.7 Vacuum Pumps ............................................................................ 1 - 28 1.8 Custody Transfer System............................................................. 1 - 30 1.8.1 Radar-Based Level Gauge ................................................. 1 - 30 1.8.2 System Readout and Control ............................................. 1 - 32 1.8.3 Float Level Gauge.............................................................. 1 - 40 1.8.4 Trim-List Indicator ............................................................ 1 - 42 1.9 Nitrogen Production System ........................................................ 1 - 44 1.10 Inert Gas and Dry Air System.................................................... 1 - 46 1.11 Gas Detection System ................................................................ 1 - 48 1.12 Cargo and Ballast Valve Control ............................................... 1 - 50 1.12.1 Cargo and Ballast Control System................................... 1 - 50 1.12.2 Emergency Shutdown System ......................................... 1 - 54 1.12.3 Ship Shore Link ............................................................... 1 - 56 1.12.4 Mooring Load Monitoring System .................................. 1 - 60 1.13 Relief Systems ........................................................................... 1 - 62 1.13.1 Cargo Tank Relief Valves................................................ 1 - 62 1.13.2 Insulation Space Relief Valves ........................................ 1 - 62 1.13.3 Pipe Relief Valves ........................................................... 1 - 62 1.14 Ballast Level and Draft Indicating System ................................ 1 - 64 1.15 Fuel Oil Bunkering and Transfer Systems ................................. 1 - 66. Part 2 Cargo Auxiliary and Deck System ............................................... 2 - 1 2.1 Temperature Monitoring System ................................................... 2 - 2 2.2 Insulation Space Nitrogen Control System .................................... 2 - 4 2.3 Cofferdam Glycol Heating System ................................................ 2 - 6 2.3.1 Hull Ventilation ................................................................. 2 - 10 2.4 Fire Fighting System .................................................................... 2 - 12 2.4.1 Fire Protection and Wash Deck.......................................... 2 - 12 2.4.2 Water Spray System........................................................... 2 - 14 2.4.3 Dry Powder System ........................................................... 2 - 16 2.4.4 CO2 System ....................................................................... 2 - 18 2.4.5 Fire Detection System........................................................ 2 - 20 2.5 Auxiliary FW Cooling System..................................................... 2 - 22 2.6 Steam Condensate System ........................................................... 2 - 23 2.7 Bilge and Scupper System ........................................................... 2 - 26 2.8 Instrument Air System ................................................................. 2 - 27 2.9 Emergency Air System ................................................................ 2 - 28 Part 3 Cargo Operations........................................................................... 3 - 1 3.1 Insulation Space Tests.................................................................... 3 - 1 3.2 Post Dry Dock Operation ............................................................... 3 - 3 3.2.1 Insulation Space Inerting ..................................................... 3 - 3 3.2.2 Drying Cargo Tanks............................................................. 3 - 7 3.2.3 Inerting Cargo Tanks ........................................................... 3 - 9 3.2.4 Gassing-up Cargo Tanks.................................................... 3 - 11 3.2.5 Cooling Down Cargo Tanks .............................................. 3 - 15 3.3 Ballast Passage............................................................................. 3 - 17 3.3.1 Cooling Down Tanks Prior to Arrival................................ 3 - 19 3.3.2 Spraying During Ballast Voyage ....................................... 3 - 21 3.4 Loading ........................................................................................ 3 - 23 3.4.1 Preparations for Loading.................................................... 3 - 23 3.4.2 Cargo Lines Cool Down .................................................... 3 - 23 3.4.3 To Load Cargo with Vapour Return to Shore .................... 3 - 27 3.4.4 Nitrogen Set-up During Loading ....................................... 3 - 31 3.4.5 De-Ballasting ..................................................................... 3 - 33 3.5 Loaded Voyage with Boil-Off Gas Burning ................................ 3 - 35 3.5.1 Normal Boil-Off Gas Burning ........................................... 3 - 35 3.5.2 Forced Boil-Off Gas Burning ............................................ 3 - 37 3.6 Discharging with Gas Return from Shore .................................... 3 - 39 3.6.1 Preparations for Unloading ................................................ 3 - 39 3.6.2 Liquid Line and Arm Cooldown before Discharging ........ 3 - 42 3.6.3 Discharging ........................................................................ 3 - 44 3.6.4 Ballasting ........................................................................... 3 - 47. 3.7 Pre-Dry Dock Operations............................................................. 3 - 49 3.7.1 Stripping and Line Draining............................................... 3 - 49 3.7.2 Tank Warm Up................................................................... 3 - 51 3.7.3 Inerting ............................................................................... 3 - 53 3.7.4 Aeration.............................................................................. 3 - 55 Part 4 Integrated Automation System (IAS)........................................... 4 - 1 4.1 General ........................................................................................... 4 - 3 4.2 Hardware ........................................................................................ 4 - 6 4.3 Operation........................................................................................ 4 - 7 Part 5 Emergency Procedures .................................................................. 5 - 1 5.1 Vapour Leakage ............................................................................. 5 - 2 5.2 Liquid Leakage............................................................................... 5 - 4 5.3 Water Leakage to Barrier Space..................................................... 5 - 7 5.4 Fire and Emergency Breakaway..................................................... 5 - 7 5.5 Emergency Cargo Pump Installation.............................................. 5 - 9 5.6 One Tank Operation ..................................................................... 5 - 11 5.6.1 Warm Up (No.3 Tank) ....................................................... 5 - 11 5.6.2 Inerting ............................................................................... 5 - 13 5.6.3 Aeration.............................................................................. 5 - 15 5.6.4 Drying and Inerting ............................................................ 5 - 17 5.7 Ship to Ship Transfer.................................................................... 5 - 18 5.8 Jettisoning of Cargo ..................................................................... 5 - 19 Part 6 Design Concept of the Vessel......................................................... 6 - 1 6.1 Principal Particulars ....................................................................... 6 - 1 6.2 Rules and Regulations .................................................................... 6 - 7 6.3 Design Concept of the Cargo System............................................. 6 - 9 6.3.1 Cargo Containment System Principle .................................. 6 - 9 6.3.2 Membrane Cargo Containment .......................................... 6 - 10 6.3.3 Deterioration or Failure...................................................... 6 - 15 6.4 Hazardous Areas and Gas Dangerous Zone ................................. 6 - 17 Part 7 Properties of LNG.......................................................................... 7 - 1 7.1 Physical Properties, Composition and Characteristics of LNG...... 7 - 1 7.2 Characteristics of LNG................................................................... 7 - 4 7.2.1 Flammability of Gases ......................................................... 7 - 4 7.2.2 Supplementary Characteristics ............................................. 7 - 5 7.2.3 Avoidance of Cold Shock to Metal ...................................... 7 - 6 7.3 Health Hazards ............................................................................... 7 - 7. Part 1 Cargo and Ballast System.

(7) LNGC BERGE EVERETT. Cargo Operating Manual. Illustration 1.1a Cargo Piping System. CG514. CG524 CG523. CG525. IG022. CG527. CG526. CG522. CG512. CG519. LNG LIQUID LINE. No.1 B.O/W.UP HEATER. CG520. CG518. CG517. CG508. No.2 LOW DUTY COMP. CG502. CS506. CG532. CG504. FORCING VAP.. STRIPPING LINE. CG501. CG503 CS505. LNG VAPOUR LINE CG505. CG507. TO E/R. CG509. No.1 HIGH DUTY COMP. CG506. CG521 CG405. No.2 HIGH DUTY COMP. CG510. CG511. No.2 B.O/W.UP HEATER. FROM E/R IG021 IG020. CG516. CG002. CG513. CG515. No.1 LOW DUTY COMP.. CS504. CN683. CS503. DEMISTER CG530. TO INS.PRESS.. LNG VAPORIZER. CS501. CS502 CG528. CS003 GAS MAIN VAPOUR MAIN CS002. CS004. CS001. STRIPPING/SPRAY MAIN. LIQUID MAIN. CF401. CF301. CF302. CF402. No.4 CARGO TANK. CF201. CF101. CF102. CF202. No.3 CARGO TANK. No.2 CARGO TANK. 1-1. No.1 CARGO TANK. Part 1 Cargo and Ballast System.

(8) LNGC BERGE EVERETT Part 1 Cargo and Ballast System 1.1 Cargo Piping System Description. Cargo Operating Manual. The Inert Gas and Dry-Air System (section 1.10), located in the Engine Room, is used to supply inert gas or dry air to the cargo tanks via piping which connects with the main cargo system through a blind valve (seutelven) to avoid gas returning to the engine room.. The cargo piping system is illustrated in a simplified perspective drawing showing only the principal features of the system.. All of the cargo piping is welded to reduce the possibility of joint leakage. Flanged connections are electrically bonded by means of bolts/nuts between flanges to ensure that differences in potential, due to static electricity between cargo and other deck piping, tanks, valves and other equipment, are avoided.. Liquid cargo is loaded and discharged via the two crossover lines at midships and is delivered to and from each cargo tank liquid dome via the liquid header which runs fore and aft along the trunk deck. Each crossover line at midships separates into two loading/discharging connections, port and starboard, making a total of four loading/discharge connections on each side of the ship.. Both liquid and vapour systems have been designed in such a way that expansion and contraction are absorbed in the piping configuration. This is done by means of expansion loops and bellows on liquid and vapour piping respectively.. The cargo tank vapour domes are maintained in communication with each other by the vapour header running fore and aft along the trunk deck. The vapour main also has a cross connection at the midship manifold for use in regulating tank pressures when loading and discharging. When loading, the vapour header and crossover, together with the HD compressors, are used to return the displaced gas from the tanks back to the shore installation. When discharging, the vapour header is used in conjunction with either the vapour crossover, or a vaporizer, to supply gas to the tanks to replace the outgoing liquid cargo. The stripping/spray line can be connected to the liquid crossover lines and can be used to drain or to cool down each cargo tank, and also to spray during discharging if the return vapour is insufficient. The vapour header and stripping/spray headers are both connected to the vapour dome of each tank. The vapour domes also house the tank safety valves, pressure pick up and three sample points. The spray line on each tank consists of two spray assemblies inside the tank at the top to distribute the incoming liquid into several spray nozzles in order to assist in evaporation and thus achieve a better cool down rate. The stripping/spray, liquid and vapour headers have branches to and from the cargo auxiliaries room with connections to the compressors, heaters and vaporizer for various auxiliary functions. Removable bends are supplied for fitting where necessary to allow cross-connection between the various pipe work for infrequent uses such as preparing for dry dock and recommissioning after dry dock.. Fixed and sliding pipe supports and guides are provided to ensure that pipe stresses are kept within acceptable limits. All sections of liquid piping that can be isolated, and thus possibly trapping liquid between closed valves, are provided with safety valves which relieve excess pressure to the nearest vapour dome. This is a safety measure, although normal working practice is to allow any remaining liquid to warm up and boil off before closing any such valves. All major valves such as the midships manifold (port and starboard) valves, also called ESD Manifold Valves, and individual tank loading and discharge valves, are remotely power operated from the IAS, so that all normal cargo operations can be carried out from the Cargo Control Room (CCR). When an ESD is activated, the manifold valves are closed, discontinuing loading or unloading operations. A non-return valve is fitted at the discharge flange of each cargo pump. A 6 mm hole is drilled in the valve disc to allow the tank discharge lines to drain down and be gas freed. Non-return valves are also fitted at the discharge flange of the compressors. The spray/stripping and emergency cargo pump discharge lines have non-return valves located directly after the hydraulically operated discharge valves. A small 6 mm diameter spray nozzle is also fitted at the top of each cargo pump discharge line inside the tank to cool down the pump tower leg in order to maintain a cold temperature through the complete discharge.. 1.1.1 Liquid, Vapour, Spray Pipes The system comprises a 600\450A butt welded, cryogenic stainless steel pipeline connecting each of the four cargo tanks to the loading/discharge manifolds at the ship’s side by means of a common line. At each tank liquid dome there is a manifold which connects to the loading and discharge lines from the tank to allow for the loading and discharge of cargo. This manifold on the liquid dome connects to the tank discharge lines from the port and starboard cargo pumps, the loading line, emergency pump well and spray line. No.2 and 3 tanks also have the facility to fill the discharge line prior to start of cargo pumps to prevent pressure surge. At certain points along the liquid line, blank flanges and sample points are fitted to facilitate inerting and aeration of system during refit. All sections of the liquid line outside the cargo tanks are insulated with a rigid polyurethane foam, covered with a moulded GRP cover to act as a tough water and vapour tight barrier Vapour Line The system comprises a 700\600\500\350A cryogenic stainless steel pipeline connecting each of the four cargo tanks by means of a common line to the ship side vapour manifold, the compressor room and the forward vent mast. The line to the cargo compressor room allows for the vapour to be used in the following manner: Sent ashore during cargo loading by means of the HD compressors in order to control pressure in the cargo tanks. During ballast/loaded voyages the boil-off gas is sent to the engine room via the LD compressors and heater for use as fuel in the boilers. During repair periods the gas to be vapourised and used to purge-dry the cargo tanks. The line to the forward riser acts as a safety valve to all tanks and is used to control the tank pressure during normal operations. At certain points along the vapour line, blank flanges and sample points are fitted to facilitate inerting and aeration of system during refit.. The vapour header connects the vapour domes to each other for the venting of boil off gas, which discharges to atmosphere through vent mast riser No.1. The vapour main also directs the boil-off gas to the engine room for gas burning, via the LD compressors and boil-off/warm-up gas heaters.. All sections of the vapour line outside the cargo tanks are insulated with a rigid polyurethane foam covered with a moulded GRP cover to act as a tough water and vapour tight barrier.. 1-2. Part 1 Cargo and Ballast System.

(9) LNGC BERGE EVERETT. Cargo Operating Manual. Illustration 1.1a Cargo Piping System. CG514. CG524 CG523. CG525. IG022. CG527. CG526. CG522. CG512. CG519. LNG LIQUID LINE. No.1 B.O/W.UP HEATER. CG520. CG518. CG517. CG508. No.2 LOW DUTY COMP. CG502. CS506. CG532. CG504. FORCING VAP.. STRIPPING LINE. CG501. CG503 CS505. LNG VAPOUR LINE CG505. CG507. TO E/R. CG509. No.1 HIGH DUTY COMP. CG506. CG521 CG405. No.2 HIGH DUTY COMP. CG510. CG511. No.2 B.O/W.UP HEATER. FROM E/R IG021 IG020. CG516. CG002. CG513. CG515. No.1 LOW DUTY COMP.. CS504. CN683. CS503. DEMISTER CG530. TO INS.PRESS.. LNG VAPORIZER. CS501. CS502 CG528. CS003 GAS MAIN VAPOUR MAIN CS002. CS004. CS001. STRIPPING/SPRAY MAIN. LIQUID MAIN. CF401. CF301. CF302. CF402. No.4 CARGO TANK. CF201. CF101. CF102. CF202. No.3 CARGO TANK. No.2 CARGO TANK. 1-3. No.1 CARGO TANK. Part 1 Cargo and Ballast System.

(10) LNGC BERGE EVERETT. Cargo Operating Manual. Spray Line. 1.1.3 Fuel Gas and Vent Pipes. The system comprises a 80/65A butt welded, cryogenic stainless steel pipeline connecting the spray pump in each of the four cargo tanks to the stripping/spray header and serves the following functions by supplying LNG to:. During transportation of LNG at sea, gas vapour is produced due to the transfer of heat from the outside sea and air, through the tank insulation; also energy is absorbed from the cargo motion due to the vessel’s movement.. Spray rails in each tank, used for tank cool down and gas generation main liquid line, used for cooling down lines prior to cargo operations priming of discharge lines in No.2 and 3 cargo tanks to prevent line surge when starting main cargo pumps Supply of LNG or LN2 to vaporizers for gas generation to compressors and heaters At certain points along the spray line, blank flanges and sample points are fitted to facilitate inerting and aeration of system during refit.. Under normal power conditions, the boil-off gas is used as a means of fuel in the ship’s boilers. The gas vapour is taken from the vapour header and passed through the demister, then on into the LD Compressors. It then passes through the boil-off/warm up heater before going to the ship’s boilers where it is burnt as fuel. The fuel gas pipe to the engine room is 300A and is fitted with fuel gas master valve and a flow meter. Vent Line. All sections of the spray line outside the cargo tanks are insulated with a rigid polyurethane foam covered with a moulded GRP cover to act as a tough water and vapour tight barrier.. 1.1.2 Gas Line (One Tank Operation) The system comprises a 300A pipeline which can be connected to the vapour line and the forward vent mast for use when ‘One Tank Operation’ is required.. During normal operations the pressure in the tanks is controlled by the use of the boil-off gas in the boilers as fuel, or controlled via the forward vent mast and the common vapour line. Each cargo tank is also fitted with an independent means of venting, comprising of two 250A lines exiting the tank top into their own pilot operated relief valve. From here the gas passes through a 300A and/or 450A line into a vent mast where it is vented to atmosphere.. The use of this line enables a single tank to be isolated and repair work carried out without having to warm up and inert the whole vessel.. All vent mast are protected by the N2 purge fire smothering system.. Connection to each individual tank is by means of a spool piece between the 200A blank flanges situated at each vapour dome on the vapour and gas header.. At certain points along the vent line, sample points are fitted to facilitate inerting and aeration of system during refit.. During single tank operations it is possible to connect to the Inert Gas Generator by means of a spool piece.. Sections of the vent line outside the cargo tanks are insulated with a rigid polyurethane foam covered with a moulded GRP cover to act as a tough water and vapour tight barrier.. At certain points along the gas header, blank flanges and sample points are fitted to facilitate inerting and aeration of system during refit.. 1.1.4 Inerting/Aeration Pipes The system comprises of a 450 mm flanged line which supplies inert gas/dry air to the cargo tanks and pipelines for inerting and drying during refit periods. The inert gas/dry air is supplied from the inert gas plant situated in the engine room. The line is connected to the gas header and the liquid header by means of a spool piece. By selective use of the spool pieces it is possible to inert/aerate all or a single cargo tank.. 1-4. Part 1 Cargo and Ballast System.

(11) LNGC BERGE EVERETT. Cargo Operating Manual. Illustration 1.2a Operator Curve for Cargo Pumps SAPRAY PUMP CURVE SPRAY PUMP, MODEL 2EC-092 (LNG at –163’C, 440 Volts, 60Hz) 7.0. 40.0. 6.5. 37.5. 850. (Over Current Relay = 877 Amps). 800. 7.0. 750. Discharge Pressure. 6.5. 700. 5.0. 4.5. Current (0.47 SG) 4.0. Current (0.43 SG). 600. (Maximum Flow = 2,040 m3/hr). 5.5. 650. (Rated Flow = 1,700 m3/hr). 6.0. 3.5. (Under Current Relay = 378 Amps). 550. 500. Corresponding Current Draw (Amps). 7.5. 32.5. 5.0. 30.0. 4.5. 27.5. 4.0. 3.5. 3.0. 2.5. Current (0.47 SG). 2.0. Current (0.43 SG). (Under Current Relay = 15 Amps). 25.0. 22.5. 20.0. Corresponding Current Draw (amps). 8.0. Discharge Pressure. 5.5. (Maximum Flow = 60 m3/hr). 900. (Minimum Continuous Flow = 562 m3/hr). 17.5. 15.0. 1.5. 12.5. 1.0. 10.0 0. 4. 8. 12. 16. 20. 24. 28. 32. Capacity. 36. 40. 44. 48. 52. 56. 60. 64. (m3/hr). - Refer to INSTALLATION, OPERATION AND MAINTENANCE MANUAL in all cases for detailed instructions. - This graph is based on shop testing of pumps supplied to DAEWOO HEAVY INDUSTRIES and is provided for reference only. - Actual expected TDH to be modified to reflect on-site conditions of piping, pressure tap elevation, field SG, tank liquid level and tank gas pressure. - To convert pressure (bar) to head (m): TDH = (PRESSURE x 10.2) / (FIELD SPECIFIC GRAVITY) - To normalize on-site amperage: AMP1 = AMP2 x (440/VOLT2) x (0.45/SG2), (Where: 2 = on-site conditions; 1 = conditions in above graph). 450. 400. EMERGENCY CARGO PUMP CURVE Ebara Model 8ECR-12 (LNG @ -163’C, 440 Volts, 60 Hz). 400. 500. 600. 700. 800. 900. 1000. 1100. 1200. 1300. 1400. 1500. 1600. 1700. 1800. 1900. 2000. 2100. 350 2200. 8.5. 330 (Over Current Relay = 320 Amps). Capacity (m3/hr) - Discharge Pressure Gauge Reading will be different when tank is above or below one-half tank level (13.38 m) and SG different than 0.45. - To convert Pressure (bar) to Head (m): TDH = (PRESSURE x 10.2) / (FIELD SPECIFIC GRAVITY) - To normalize on-site Amperage: AMP1 = AMP2 x (440/VOLT2) x (0.45/SG2), (Where: 2 = on-site conditions; 1 = conditions in above graph). 8.0. 300. Discharge Pressure. 7.5. 270. 7.0. 240. 6.5. 210. 6.0. 180. 5.5. Current (0.47 SG) Current (0.43 SG). 5.0. 4.5. 4.0. (Under Current Relay = 76 Amps). 3.5. 150. 120. 90. Corresponding Current Draw (Amps). 300. (Maximum Flow = 660 m3/hr). 200. (Rated Flow = 550 m3/hr). 100. (Minimum Continuous Flow = 196 m /hr). 0. 3. 3.0. Pump Discharge Pressure Gauge Reading (bar) at 0.45 SG with Cargo Tank One-Half Full (Gauge 17.3 m Above Liquid Level). Pump Discharge Pressure Gauge Reading (bar) at 0.45 SG with Cargo Tank One-Half Full (Gauge 17.3 m Above Liquid Level). 8.5. 35.0. (Rated Flow = 50 m3/hr). MAIN CARGO PUMP CURVE. Ebara Model 12EC-24 (LNG at –163’C, 440 Volts, 60Hz). 6.0. (Minimum Continuous Flow = 16 m3/hr). Total Discharge Pressure (bar) at 0.45 SG with Liquid Level 29.3 m Below Pressure Gauge. (Over Current Relay = 35 Amps). 60. 30. 3.0 0. 50. 100. 150. 200. 250. 300. 350. 400. 450. 500. 550. 600. 650. 0 700. Capacity (m3/hr) - Discharge Pressure Gauge Reading will be different when tank liquid level is above or below one-half tank level (13.38 m) and SG is different than 0.45. - To convert pressure (bar) to head (m): TDH = (PRESSURE x 10.2) / (FIELD SPECIFIC GRAVITY) - To normalize on-site amperage: AMP1 = AMP2 x (440/VOLT2) X (0.45/SG2), (Where: 2 = on-site conditions; 1 = conditions in above graph)". 1-5. Part 1 Cargo and Ballast System.

(12) LNGC BERGE EVERETT 1.2 Cargo Pumps General Description The ship is fitted with submerged, electric, single-stage (the stripping/spray pumps are two-stage), centrifugal cargo pumps manufactured by Ebara Cryodynamics. They are installed at the bottom of each tank. Two sizes of pump, main cargo and stripping/spray pumps are installed as fixed units, i.e two main cargo pumps and one stripping/spray pump per tank. In addition, provision is made at each tank to introduce an emergency cargo pump in case of total cargo pump failure. One emergency pump is available on each ship. Operation The cargo pumps are started and stopped from the Cargo Control Room (CCR) mainly via the IAS Schematic Display C03, C04 and the associated group displays. These are also accessed through the loading and unloading plans and monitor Schematic Displays. They will also be automatically stopped in the event of various shut down trips being activated both in relation to the cargo system and the pumps themselves. Each cargo pump electric motor is protected from: Overload (over current) Low-current (no load operation) Imbalance between phases (single-phasing) Too long starting. The main cargo pumps are direct on-line started. Swing check valves are installed inside the tanks just down steam of the cargo pump discharge flange. These valves assist in the reduction of any excessive liquid hammer that can occur if the pumps are not started in accordance with the steps outlined in this section. The power supply to the cargo pump motors is made available via cargo switch boards which are arranged in two independent sections that are normally operated as coupled, via bus-tie connection, or independently. No.1 cargo switchboard supplies the No.1 pumps in all four tanks, while No.2 cargo switchboard supplies the No.2 cargo pumps. Each of the cargo switchboards can be supplied by either, or both, of the main switchboards. Due to high electrical load imposed on the cargo switchboards by the running of main cargo pumps, there is a limitation on the number of pumps that can be run depending on the electrical power management system (start block).. Cargo Operating Manual. The pumps should be started individually and sequentially, as required, with the pump discharge valve open (approximately min. 5% to max. 25%).. Starting Procedure for the Stripping/Spray Pumps a). If the pump discharge valve position does not open to min. 5%, pump will not be started due to starting interlock function. Starting Procedure for the Main Cargo Pumps a). b) Choose the pump discharge valve symbol for the pump to be started. The following information appears on the bottom right hand corner of the screen in the ‘change zone’. Valve’s reference % OPEN % CLOSE. Check to confirm that no pumps are in starting phase.. b) Select the cargo mimics display. c). Choose the discharge valve symbol for the pump to be started.. c). The following information appears on the lower side of the screen in the change zone. Valve’s reference % OPEN % CLOSE. Choose the pump symbol for starting the pump. The following information appears on the lower side of the screen in the ‘change zone’. Pump’s reference START STOP Valve’s reference OPEN STOP CLOSE. Open the discharge valve to 25% (maximum). If the valve position does not correspond to the request, a time-out (valve failed) alarm is displayed.. d) Choose the pump symbol for starting the pump. The following information appears on the lower side of the screen in the ‘change zone’. Pump’s reference START STOP Valve’s reference OPEN STOP CLOSE. d) Open the discharge valve to 25% (maximum). If the valve position does not correspond to the request, a time-out (valve failed) alarm is displayed. The valve will change to the line process colour. e). Select the mimic display for the stripping/spray pump’s operation.. e). Start the associated stripping/spray pump.. Start the associated main cargo pump. Once the pump has started (the pump symbol changes from ‘White’ stop to run ‘Green’) open the discharge valve gradually from the operator station via the incremental button, to give the required flow-rate. The discharge pressure and pump motor amps are monitored and adjusted to ensure the most efficient operation as indicated on the pump performance graph, with due regard being taken of the head of liquid on the pump discharge flange. The manifold On-Off valves are controlled from the mimic screen, the states of which are indicated from limit switches. Note ! The starting duration is 7 seconds for each pump.. 1-6. Part 1 Cargo and Ballast System.

(13) LNGC BERGE EVERETT. Cargo Operating Manual. Illustration 1.2.1a Main Pumps. Liquid Rated Flow Rated Head Specific Gravity Impeller Trim. Electrical Cable. Pump Charteristic Curve Main Cargo Pump. : LNG : 1700 m3/h : 155m : 0.5 : 625mm. 220. 550 Head. 200. 500. Shaft Power at 0.5 SG. 180. Lifting Eyebolt. 160 Head (m), Efficiency (%) And NPSHR/Pump Down x 100(m). Junction Box. Cooling/Lubricating Filter. 450 Minimum Continuous Flow (557 m/h). 400 H. 140. 350 Maximum Flow (2040 m3/h). 120. 300. 100. 250 Efficiency. 80. 200. 60. Upper Bearing. Power (kW). Pump Discharge. 150. 40. 100. NPSHR. 20. 50 Pump Down. 0. Stator. 0. 100. 200. 300. 400. 500. 600. 700. 800. 0 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 Flow (m3/h). Representative Motor Performance Data (Calculated) 522.2kW/700HP/440V/60Hz/Y500 100. 1800. 90. 1799. 800. 80. 1798. 700. 70. 1797. 600. 60. 500. 50. 1000 Speed (RPM) 900. Power Factor (%). Power Input (kW) And Current (amps). Lower Bearing. Automatic Thrust Balancing Device Impeller. Current (amps). 400. 40. 300 200 100 0 05. 0. 100. 150. 200. 250. 300. 350. 400. 450. 500. 550. 600. 650. 1795 1794. 30. 1793. 20. 1792. 10. 1791. Input Power (kW). Pump Inlet. 1796. 0 700. Shaft Speed (RPM). Efficiency (%). Efficiency (%) and Power Factor (%). Rotor. 1790. Shaft Power Out (kw). 1-7. Part 1 Cargo and Ballast System.

(14) LNGC BERGE EVERETT 1.2.1 Main Cargo Pumps. The cargo pumps will be automatically stopped should any of the following occur:. (See Illustration 1.2.1a). 1) Cargo tank pressure below, or equal to, primary insulation space pressure plus 5 mbar (ESDS: Cargo Tank Protection).. Specification Manufacturer: Pump model: Number of stages: Operating temperature: Capacity rated flow: Rated head: Power rated: Efficiency: Rotational speed: Minimum starting level :. Cargo Operating Manual. Ebara International Corporation 12EC-24 1 -163°C 1,700 m3/h 155 m 448.4 kW (Motor rated at 522.2 kW) 80.8 % 1,780 rpm 0.89 m. 2) Vapour header pressure below or equal to atmospheric pressure plus 3 mbar.. 4) Activation of emergency shut down trip (10 push buttons and 12 fusible elements) (ESDS: Stage 1) 5) Activation of ship/shore pneumatic, fibre-optic or electrical shutdown (ESDS: Stage 1) 6) Motor single-phasing. The pump discharge valves will be throttled to ensure optimum performance as indicated by the pump performance graph.. 8) High motor current (electrical overload). Under normal conditions it should be possible to maintain the full discharge rate until the tank level approaches approximately 2.3 m, at which time the pump will start to cavitate and lose suction as indicated by fluctuations in the discharge pressure and ammeter readings. The discharge valves should be throttled to stabilise conditions and one pump stopped if necessary. The remaining pump should be progressively throttled in to maintain suction and to prevent the operation of the low discharge pressure trip, until a level of approximately 0.37 m is reached. By trimming the vessel 1 meter or more by the stern, it should be possible to reduce the amount of liquid remaining in the tanks before the pumps are stopped. Adjust the trim carefully at the end of discharging cargo to give an even keel for gauging. The cargo pumps may be run in closed circuit on their own tanks by opening the loading valve. This may be required if the discharge is temporarily halted when the tanks are at low level, thereby avoiding the problems of restarting with low level and low discharge pressure.. 1) Normal start-up - 1st restart : minimum 5minutes after shut down - 2nd restart : 15minutes after 1st restart - 3rd restart : 15minutes after 2nd restart No more than 4 restarts within one hour. 3) Extreme high level in cargo tank (99% volume).. Each main cargo pump is rated to discharge 1,700 m3/h at 155 m head of LNG. For optimum discharge results, bulk discharge will be carried out with 8 pumps running in parallel.. During the course of discharge, changes in flow rate and tank levels will alter these readings and the discharge valve will have to be readjusted accordingly.. Restart of pumps in normal operation are restricted depending on the liquid level above the submerged electric motor. Pumps may not be restarted with tank liquid level below at 0.89 m.. 2) Emergency start-up For liquid level below motor centerline (approximately 1.5 m liquid in tank), restart after 30 minutes and not more than 2 restarts within one hour. Note ! In case of a sustained locked rotor start, attempt to restart only after 30 minutes and with no more than 2 restarts total. Quantities of cargo remaining in tanks after stripping refer to chapt. 3.6.3 discharging.. 7) Low motor current. 9) Low discharge pressure with time delay at starting 10) Cargo Control Room stop 11) Activation of ESDS stage 2 12) Cargo tank level low ESDS signifies that all cargo plant is shut down in addition to the pump(s) on the tank(s) in question. Note ! An insulation test of all pumps is to be carried out before arrived loading and discharging port in order to establish that all pumps are operational and to allow time for the installation of the emergency cargo pump should it be necessary. Disconnect the insulation monitor at terminal 6 before carrying out this test. Note ! Pump should not be started or operated against closed discharge valve due to potential damage which may result due to insufficient cooling and lubrication for motor and bearing and excessive vibration levels associated with zero flow conditions.. The pump shall be tested before arrival discharge port on calm sea condition, and during loading when the tank level is about 4~5 m subject to terminal’s acceptance.. 1-8. Part 1 Cargo and Ballast System.

(15) LNGC BERGE EVERETT. Cargo Operating Manual. Illustration 1.2.2a Stripping/Spray Pumps. Pump Discharge. : : : : :. Pump Characteristic Curve Stripping / Spray Pump. LNG 0.5 50 m3/h 135m 209m. 2.0. 200 180. Minimum Cont. Flow (16.0m3/h). Head. Shaft Power at 0.5SG. Head (m), Efficiency (%) & NPSH/Pump Down x 100(m). 160. Junction Box Cooling/Lubricating Filter. Upper Bearing. 1.8 1.6. Maximum Flow(60.0m3/h). 140. 1.4. 120. 1.2. 100. 1.0. 80. 0.8. Efficiency. 60. 0.6. NPSHR 0.4. 40. Rotor. Pumpdown. 20 0. Stator. Power (kW). Lifting Eyebolt. Liquid Specific Gravity Rated Flow Rated Head Impeller Trim. Electrical Cable. Lifting Eyebolt. 0.2 0. 0. 5. 10. 15. 20. 25. 30. 35. 40. 45. 50. 55. 60. 65. 70. Flow (m3/h). Representative Motor Performance Data (Calculated) 22.4 Kw / 30HP / 440V / 60HZ / Y250 3600. 100. Efficiency (%). 90. Upper Impeller. Lower Impeller Pump Inlet. Inlet Filter. Speed (RPM). 3590. Power Factor (%). 80. 3580. 70. 3570. 60. 3560 3550. 50. Current (Amperes) 3540. 40. kW Input (kW). 30. 3530. 20. 3520. 10. 3510. 0. 05. 10. 15. 20. 25. Shaft Speed (rpm). Automatic Thrust Balancing Device. Power Input(kW), Current(Amps), Efficiency(%) and Power Factor(%). Lower Bearing. 30. 0. Shaft Power Output(kW). 1-9. Part 1 Cargo and Ballast System.

(16) LNGC BERGE EVERETT 1.2.2 Stripping/Spray Pumps. 4) Activation of Emergency Shut Down System trip (10 push-buttons and 12 fusible elements) (ESDS: Stage 1). (See Illustration 1.2.2a). 5) Activation of ship/shore pneumatic, fibre-optic or electrical shutdown (ESDS: Stage 1). Specification Manufacturer: Pump model: Number of stages: Operating temperature: Capacity rated flow: Rated head: Power rated: Efficiency: Rotational speed: Minimum starting level:. Cargo Operating Manual. Ebara International Corporation 2EC-092 2 -163°C 50 m3/h 135 m 6.9 kW (Motor rated at 22.4 kW) 54.4 % 3,560 rpm 0.3 m. A stripping/spray pump is installed in each tank for cooling purposes and for forced vaporization of LNG. It is rated at 50 m3/h at 135 m head of LNG.. 6) Motor single-phasing 7) Low motor current 8) High motor current (Electrical overload) 9) Low discharge pressure with time delay at starting 10) Cargo Control Room stop 11) Activation of ESDS stage 2 12) Cargo tank level low low. The pumps are started and stopped from the CCR via the IAS. In an emergency all pumps will be stopped by activation of the Emergency Shut Down System trip. The instances when these pumps can be used are:. Note ! An insulation resistance test of all pumps is to be carried out before arrived loading and discharging port in order to establish that all pumps are operational and to allow time for the installation of the emergency cargo pump should it be necessary.. 1) To cool down the liquid header prior to discharging. 2) To cool the cargo tank during ballast voyage prior to arrival at the loading terminal by discharging LNG to the spray rails in the tanks. 3) To pump LNG from the tanks to the forcing vaporizer or LNG Vaporizer (emergency case) when forced vaporization of LNG in the boilers is required. 4) To enable each cargo tank to be stripped as dry as possible for reasons such as technical stop involving cargo tank entry. Whenever possible the stripping/spray pump should be started early enough to avoid possible starting problems due to very low tank levels (about 0.5 m minimum). The stripping/spray pumps will be stopped automatically should any of the following occur:. Restart of pumps in normal operation are restricted depending on the liquid level above the submerged electric motor. Pumps may not be restarted with tank liquid level below at 0.3 m. 1) Normal start-up - 1st restart : minimum 5minutes after shut down - 2nd restart : 15minutes after 1st restart - 3rd restart : 15minutes after 2nd restart No more than 4 restarts within one hour 2) Emergency start-up For liquid level below motor centerline (approximately 0.56 m liquid in tank), restart after 30minutes and not more than 2 restarts within one hour,. 1) Cargo tank pressure below or equal to primary insulation space pressure plus 5 mbar (ESDS: Cargo tank protection).. Note ! In case of a sustained locked rotor start, attempt to restart only after 30 minutes and with no more than 2 restarts total.. 2) Vapour header pressure below or equal to atmospheric pressure plus 3 mbar (ESDS: Stage 1).. Quantities of cargo remaining in tanks after stripping refer to chapt. 3.6.3 discharging.. 3) Extreme high level in cargo tank (99% volume). 1 - 10. Part 1 Cargo and Ballast System.

(17) LNGC BERGE EVERETT. Cargo Operating Manual. Illustration 1.1.3a Emergency Cargo Pump. Liquid Specific Gravity Rated Flow Rated Head Impeller Trim. : : : : :. Pump Characteristic Curve Emergency Pump. LNG 0.5 50 m3/h 135m 209m. 200. 2.00. Head 175. 1.75. Minimum Cont. Flow (196m3/h). 150. 1.50. Shaft. 125. 1.25. Maximum Flow (660m3/h). 100. NPSH / Pumpdown (m). Top Bearing. Head(m), Power(kW) & Efficiency (%). Shaft Power at 0.5SG. 1.00. NPSHR. 75. 0.75. Efficiency 50. 0.50. 25. 0.25. Pumpdown 0. Rotor. 0.00 0. 50. 100. 150. 200. 250. 300. 350. 400. 450. 500. 550. 600. 650. 700. 750. 800. Flow (m3/h). Stator. Representative Motor Performance Data (Calculated) 223.8kW / 300HP / 440V / 60HZ / Y400 100. 3600. 90. 3590. 80. 3580. 350. 70. 3570. 300. 60. 250. 50. 500 Power Factor(%) 450. Speed (RPM). Impeller. Pump Inlet. Power Input (kW) and Current (amps). Automatic Thrust Balancing Device. Current (Ampere). 40. 200 Input Power (kW). 3560 3550 3540. 30. 3530. 100. 20. 3520. 50. 10. 3510. 0. 0. 150. 0. 05. 0. 100. 150. 200. 250. Shaft Speed (RPM). 400. Lower Bearing. Efficiency (%) and Power Factor (%). Efficiency(%). 300. Shaft Power Ouptput (kW). 1 - 11. Part 1 Cargo and Ballast System.

(18) LNGC BERGE EVERETT 1.2.3 Emergency Cargo Pump (See Illustration 1.1.3a, see procedure 5.5 for details of installation) Specification Manufacturer: Pump model: Number of stages: Operating temperature: Capacity rated flow: Rated head: Power rated: Efficiency: Rotational speed: Minimum starting level:. Cargo Operating Manual. Restart of pumps in normal operation are restricted depending on the liquid level above the submerged electric motor. Pumps may not be restarted with tank liquid level below 0.86 m. 1) Normal start-up. Ebara International Corporation 8ECR-12 1 -163°C 550 m3/h 155 m 171 kW (Motor rated at 223.8 kW) 67.8 % 3,560 rpm 0.86 m. - 1st restart : minimum 5minutes after shut down - 2nd restart : 15minutes after 1st restart - 3rd restart : 15minutes after 2nd restart No more than 4 restarts within one hour 2) Emergency start-up For liquid level below motor centerline (approximately 1.6 m liquid in tank), restart after 30 minutes and not more than two (2) restarts within one hour.. Each cargo tank is equipped with an emergency pump well or column. This pump well has a foot valve which is held in the closed position by highly loaded springs.. Note ! In case of a sustained locked rotor start, attempt to restart only after 30 minutes and with no more than 2 restarts total.. Should a failure of either one or both main cargo pumps in one tank require the use of the emergency pump, the emergency pump is lowered into the emergency pump well after the well has been purged with nitrogen. The weight of the emergency pump overcomes the compression of the springs to open the foot valve. A small flow of nitrogen should be maintained whilst the pump is being installed. (See section 5.5 Emergency Cargo Pump Installation) Note ! Before undertaking this operation it is important to reduce the tan k pressure to near to atmospheric pressure and to keep it at this level throughout the entire operation. Electrical connections are made to the fixed junction box which is located adjacent to each pump well. A dedicated starter is available with one circuit breaker which is placed in No.1 cargo switchboard. This starter supplies all 4 fixed junction boxes. All safety devices are transferred to the emergency pump when the circuit breaker is engaged, as they are the same for the main cargo pumps. Note ! An insulation test of all pumps is to be carried out after before arrival loading and discharging port in order to establish that all pumps are operational and to allow time for the installation of the emergency cargo pump should it be necessary.. 1 - 12. Part 1 Cargo and Ballast System.

(19) LNGC BERGE EVERETT. Cargo Operating Manual. Illustration 1.3.1a HD Compressor. VENT.. L. POWER ON PSLL 11. PSL 11. PI 8B. PSLL 8C. PSL 8C. TE 8. PI SEAL GAS. TE 9A. L. L. EMS. EMERGENCY STOP. POWER ON. EMERGENCY STOP. L. L. L. READY TO START COMPRESSOR. READY TO START AUX. L.O. PUMP. TSHH 10. PT 8. D 5. PCV 11. PSLL 8A. TE 9F. COMPRESSOR RUNNING GEAR BOX. PCV 3. 5. PI. PCV 8. INSTRUMENT AIR DRTD SURGE CONTROL. ZI 3A. FI 3. PDI 1. FI 11. FIC 1. PI 2. PT 2. TI 2. PT 2. TE 2A. BULKHEAD SEAL. B. TE 2B. E-MOTOR. T. C. C. TI 8. A. S. PROCESS GAS OUT. OIL FILTER FT 1. I/P. FY 1. F 1. PI 1. TI 1. BULKHEAD. ZSL 1. PSV 6A. PROCESS GAS IN. OP 6A. Compressor. MAIN OIL PUMP. A. YE 9 DV 1. TE 1. FILL. ZE 3. ZI 3. V 6C LOCKED OPEN. LG 5 TI 5A. ZS 3. PI. PCV 3A. HY 3. HS 3. CV 6B. MOTOR ROOM. OIL COOLER. V 6F. EM 6. LOCKED OPEN. START L.O. PUMP. START L.O. PUMP. HSH 6. HSH 6. TCV 6 TI 6A EMLH. OIL PUMP RUNNING. H 5. TLS 5. DAC 3 HIC 3. CP 6B. TI TCV 5. PCV 3B. OIL TANK. TSL 5. P. PI. TSH 5. AUX. L.O. PUMP. B LSL 5. ZSL 3. COMPRESSOR ROOM. DV 6. V 6B. PSV 6B. F 5C. PDSH 7. PDI 7B. 1.5. Set : 6 bar. IGV. FE 1. PDI 7A. CV 6A. V 6A. Set : 5 bar. F 5A. F 5B. WATER IN EMY 6. L/R. WATER OUT AUX. L.O. PUMP RUNNING. DV 5. READY TO START AUX. L.O. PUMP. AUX. L.O. PUMP OVERLOAD. I/P. REMOTE CONTROL SIGNAL 4-20mA. REMOTE START STEAM INLET. REMOTE STOP. STEAM OUTLET. 1 - 13. Part 1 Cargo and Ballast System.

(20) LNGC BERGE EVERETT. Cargo Operating Manual. 1.3 Cargo Compressors. Compressor Systems. 1.3.1 HD Compressors. Seal Gas System. Journal bearing on both sides of the high-speed shaft. Two high duty (HD) compressors, installed in the compressor room on deck, are provided for handling gaseous fluids, LNG vapour and various mixtures of LNG vapour, inert gas or air during the cooling down, cargo operation and tank treatments.. The seal gas system is provided to prevent LO mist from entering the process stream (compressed LNG vapour) and to avoid cold gas flow into the gearbox and into the LO system. Seal gas is nitrogen produced by the nitrogen generators on board.. Journal bearing on the driven end of the low speed shaft. Two low duty (LD) compressors, installed in the compressor room on deck, are provided for handling the LNG vapour for the boiler produced by the natural boil off and forced vaporization, which is used as fuel.. The seal gas is injected into the carbon ring with back-up labyrinth type seals between the gearbox shaft bearing and the compressor wheel.. The HD and LD compressors are driven by electric motors, installed in an electric motor room segregated from the compressor room by a gas tight bulkhead; the shaft penetrates the bulkhead with a gas tight shaft seal. HD Compressors Manufacturer: Model: Type: Volume flow: Inlet pressure: Outlet pressure: Inlet temperature: Shaft speed: Motor speed: Rated motor power: Inlet guide vanes setting: Efficiency:. Cryostar CM 400/55 - HD Centrifugal. Single stage. Fixed speed with adjustable guide vanes. 35,000 m3/h 1,060 mbarA 1,960 mbarA -140°C 11,200 rpm 3,580 rpm 1,000 kW -30 to +80 deg 80%. The compressors are operated locally or from the IAS in CCR. The following conditions trip the compressors: Safeties in ESDS and Tank protection system : Tk No.1, 2, 3 or 4 - differential pressure: tank/primary space = 5 mbar Tk No.1, 2, 3 or 4 - differential pressure: tank/primary space = 0 mbar Differential pressure: vapour header/atmospheric pressure = 3 mbar Differential pressure: vapour header / primary pressure header = 0 mbar Tank No.1, 2, 3 or 4 - extreme high liquid level (99% volume) Electric power failure and other trip signal from ESDS Ventilation flow failure in the electric motor room Safeties on local control system (oil temperature, oil pressure, discharge. The LO system feeds the following:. The system is maintained by a pressure control valve where seal gas pressure is always higher than the suction pressure (usually adjusted at 300 mbar). Seal gas entering the gearbox from the shaft seals is returned to the LO sump, separated from the oil and vented to atmosphere on top of cargo compressor room. After a period of more than 8 days of non-operation, the unit must be purged with dry and warm nitrogen. As long as the seal gas system is operated, the machine can left stand-by under gas for extended periods. LO System LO in the system is stored in a vented 400 liters LO sump. An integrated steam immersion heater with thermostatic temperature control valve is fitted in the sump to maintain a constant positive temperature and avoid condensation when the compressors are stopped. The heater will automatically switch of at 40°C LO temperature. The auxiliary LO pump is not operating below 15°C. LO is supplied from the sump through separate suction strainer screens and one of the 2 LO pumps. The discharge from the pumps is through check valves to a common LO supply line feeding the gearbox, bearings and bulkhead seal. The main operational pump is driven by the high speed shaft gear. Upon failure of the driven pump, the standby electric motor driven auxiliary pump is energised immediately. The standby electric motor driven auxiliary pump is also used during start up of the compressors. The LO passes through a fresh water cooled oil cooler and a 3-way temperature control valve, to maintain the LO inlet temperature at approximately 35°C. The oil supply to the bearings is fed via a 25 micron duplex filter.. Integral thrust and journal bearing on the non-driven end of low speed shaft Sprayers for the gear wheels HD compressors’ bulkhead seals Surge Control System An automatic surge control system is provided to ensure that the compressor flow rate does not fall below the designed minimum during start-up and steady state operation. Below this rate, the gas flow will not be stable and the compressor will be liable to surge, causing shaft vibration which may result in damage to the compressor. All the HD compressors are equipped with an automatic surge control system which consists of: A flow transmitter Suction and discharge pressure transmitter A ratio station An anti-surge controller A surge control valve on the gas stream On the basis of a preset ratio between the gas flow and compressor differential pressure signals, the anti-surge controller produces a signal which modulates a compressor surge control valve. Inlet Guide Vanes To achieve the required gas flow, the compressors have inlet guide vanes fitted at the suction end. The vanes are operated by pneumatic actuators which receive control signals from the flow controller. Rotation of the vanes is possible through its full range of travel of -30° to +80°. The position is indicated both locally and in the IAS. (Range 0 to 100%). The duplex filter has to be switched, as soon as the pressure drop reached 2 bar differential pressure and the clogged filter cartridge has to be replaced or cleaned. A pressure control valve regulates the oil flow to the bearings. Excess oil is bypassed and discharged to the sump. Pump relief valves act as back up and are set at 8 bar.. gas temperature, seal gas pressure and shart vibration). 1 - 14. Part 1 Cargo and Ballast System.

No results found