• System 110 shall not resume following system 150/250 metering.
Document / Revision No. Owner Approved
2169 / 09 Director-Plant-and-Equipment-Information 11.09.2006
System Number 59 236
System 120 - Low Pressure Production Separation
This system covers equipment cooler / valve d/s 1st stage (HP) separation up to and including pipe/header after LP separation for further processing, transport, or up to export launcher.
LP production pumps are included in the system.
System 130 - Not in Use (Doris Oil Storage and Skimmer)
Not in use for existing platforms, information only.The system covers equipment in connection with the storage of oil, the cleaning of produced water, and the cleaning of waste water from drains, etc.
System 140 - Test Separation
This system covers equipment from header and import risers up to and including the burner boom. Test production pumps are included in the system.
Note:
• Gas and oil piping from the Test Separator belongs to system 140 up to the tie-in point to production piping.
• The Test Header and piping up to the test separator are part of system 140.
System 150 - Oil/NGL Metering, Fiscal
This system covers equipment in connection with the metering of produced/transported oil/NGL.
Import metering measures oil brought to the platform.
Export metering measures oil leaving the platform.
Note:
• This system is limited to the metering skid and its immediate connections.
• A new system begins immediately down stream of the metering package, either ex-port for exex-port oil or the system the oil flows into for imex-port oil.
System 160 - NGL Separation and Stabilising
The system covers equipment in connection with the removal and reclaim of gas from the NGL separated through the gas dew point conditioning system.
Note:
• This system is not used. Included in system 280.
System 180 - Produced Water
This system covers all equipment in connection with the processing and treatment of produced water. The upstream limit is the connection to the production separator. For produced water that is discharged to sea, system 180 also includes the outfall piping. The reject oil return to the proc-ess is also system 180 up to the connection to the separator piping.
System 190 - Oil export pumping
This system covers equipment in connection with the pumping of oil from one platform to anoth-er, or ashore from a platform. The system covers equipment from the header on the inlet side to the header on the outlet side.
System Number 60 236
SYSTEM GROUP 2 - GAS PROCESS
System group 2 contains systems that together perform the required processing of gas from separators/header up to the point where the gas is transported to another platform or is compressed for landing. The group also contains systems for the injection of gas in wells and reservoirs in general.
System 200 - Gas Process Systems General
The system covers equipment not classified as belonging to a certain sub-system. This may be equipment operating several systems within group "2".
System 210 - Gas Process Compression
This system covers equipment for the compression (increasing of pressure) of gas from separators and header prior to dehydration.
System 220 - Gas Dehydration
This system covers equipment included in the dehydration process for gas in which glycol is used as water-absorbing medium. The upstream limit is the first nozzle on the glycol contactor inlet cooler. The downstream limit is the next equipment item downstream of the dehydration tower. However, on 2/4J, piping up stream of this equipment has also been designated system 220, as there is a change of piping material.
System 230 - Not in Use (Flash and Vent Gas Compression)
Not in use for existing platforms, information only.This system covers equipment in connection with the returning to the process of low pressure gas from oil separators and gas dehydration.
Note:
• This system is incorporated in system 510.
System 240 - Gas Desulphurisation (sweetening)
This system covers equipment in connection with the removal of acidiferous gases from process gas. The system can be separated into sub-systems as required. Normally the gas is cleaned in scrubbers and absorbers, whereas the acidiferous gases are stripped out by regeneration. This system is used on 2/4J for the hydrogen sulphide scavenger system and includes all piping to and from the scavenger injection point and piping from the scavenger separator back to the LP Separation system.
System 250 - Gas Metering, Fiscal
This system covers equipment in connection with fiscal metering of produced/transported gas.
Import metering measures gas brought to the platform. Export metering measures gas leaving the platform. Start and fuel gas, flare gas and Injection gas are not included in this system, but are metered as part of their respective systems. The system limits in general are the limits of the package itself, including any block valves.
System 260 - Gas Lift
This system covers equipment in connection with the compression and injection of process gas for the stimulation of the well stream flow in a well to the surface.
The headers and flow lines for gas lift are part of this system, up to the tie in to the wellhead.
Note:
• Where gas lift gas is imported via a riser, system 260 begins immediately down stream of the pig receiver.
Document / Revision No. Owner Approved
2169 / 09 Director-Plant-and-Equipment-Information 11.09.2006
System Number 61 236
System 270 - Gas Injection to Reservoir
The system covers equipment in connection with the compression and returning of process gas to the reservoir. The system limits are the take-off from the previous start of gas compression or gas export and up to the wellhead for injection, if on a single or bridge-linked system. Otherwise up to the gas injeciton export line.
Note:
• Where injection gas is imported via a riser, system 270 begins immediately down stream of the pig receiver.
System 280 - Gas Dew Point Conditioning
This system covers equipment included in the separation of NGL still present in the gas after dehydration. The system limit is the first nozzle on the first equipment item in the conditioning train. However, where material change occurs up stream of this item (as on EKOJ) the system limit is taken as the material specification change. The down stream limit is normally the inlet flange to the first equipment item in the connecting system, be it fuel gas, further compression stages or the liquid return to the separation system.
System 290 - Start, Fuel and Blanket Gas
This system covers equipment used for the treatment and distribution of fuel gas, blanket gas and gas used as a driver (power) in cranking turbines. The system limits are from the inlet flange on the first equipment item in the fuel gas system up to the inlet to the equipment or system being fed with fuel or blanket gas.
System Number 62 236
SYSTEM GROUP 3 - WATER INJECTION RESERVOIR STIMULATION
System group 3 contains systems for the injection of water in reservoirs.System 300 - Water Injection Systems General
The system covers equipment not classified as belonging to a certain sub-system.
This may be equipment operating several systems within group "3".
System 310 - Injection Seawater Supply
This system covers equipment in connection with the supply and filtration of seawater to the water treatment and injection facility.
Note:
• System 310 finishes at the inlet valve or nozzle to the UV sterilisation unit.
• Injection water which is incidentally used for cooling purposes is still part of system 310, not system 570.
System 320 - Injection Water Ultraviolet Sterilisation
This system covers equipment in connection with the removal of bacteria and microorganisms present in seawater.
System 330 - Injection Water Vacuum Deaeration
This system covers equipment in connection with the removal of dissolved gases present in sea-water.
System 340 - Injection Water Storage and Chemical Treatment
This system covers equipment in connection with the storage, cleaning and addition of chemi-cals up to the injection point.
System 350 - Injection Water Booster Pumping
This system covers equipment in connection with the supply of water with positive pressure to high-pressure pumps.
System 360 - Injection Water HP Pumping
This system covers equipment in connection with the high pressure pumping of cleaned water.
System 370 - Injection Water Export/Import Risers, Flowlines and Pipelines
This system covers equipment in connection with pipe systems carrying water under high pres-sure from high prespres-sure pumps to injection wells. The system also covers pipelines carrying wa-ter from one platform to another.Document / Revision No. Owner Approved
2169 / 09 Director-Plant-and-Equipment-Information 11.09.2006
System Number 63 236
SYSTEM GROUP 4 - OIL AND GAS IMPORT/EXPORT
System group 4 contains systems required to export oil, NGL and gas from one platform to an-other, or onshore from a platform.
System 400 - Oil and Gas Import/Export Systems General
The system covers equipment not classified as belonging to a certain sub-system. This may be equipment operating several systems within group "4".
System 410 - Export Risers, Pig Launchers and Pipelines
This system covers equipment in connection with export/transport of oil, NGL and gas from a platform to a riser on another platform, or onshore from a platform. If pumps and compressors are used, this equipment is covered by separate systems.
System 420 - Import Risers and Pig Receivers
This system covers equipment from pipeline J-tube up to and including the first shutdown valve down stream of the kicker line from the pig receiver.
System 430 - Oil Export Pumping
This system covers equipment in connection with the pumping of oil from a platform. The system covers equipment from the metering or the header on the inlet side to the pig launcher
arrangement on the outlet side.
System 440 - Gas Export Compression
This system covers equipment in connection with the compression of gas for transport from a platform. The system covers equipment from the spec break on the inlet side to metering system og pig launcher arrangement on the outlet side.
System Number 64 236
SYSTEM GROUP 5 - PROCESS UTILITY
System group 5 contains systems primarily contributing to the processing of oil/gas/NGL.
System 500 - Open Drains
This system covers piping and equipment used for the collection and treatment of water from all open drains. The system is split into Hazardous and Non-Hazardous Open Drain, which origi-nate in areas which can contain oil and gas or unclassified areas, respectively. The Open Drain System includes any sea sump.
System 510 - Flare, Vent and Blow-down
This system covers equipment used in connection with the burning and bleed-off to the atmos-phere of blanket gas and process gas from pressure tanks and pipes via safety valves and con-trol equipment. System 510 begins immediately down stream of PSVs and PSEs, otherwise down stream of the block valve from the system to be relieved or vented.
Note:
• Start on the PSV from equipment and/or directly from equipment with Atm. Vent.
• Ends in flare tip or burner boom
• Ends in vent stack or discharge to atmosphere.
System 520 - Drain System and Oily Water Treatment
The system covers equipment used for the cleaning of produced water, water from open drains, and deck drains connected to the processing plant. The system also covers equipment used to return oil recovered from the water to the process.
Note:
• This system is superfluous and should not be used for future platforms: This equip-ment is covered by systems 180, 500 and 590.
System 530 - Chemical Injection
This system contains equipment used in connection with the injection of chemicals in pipe sys-tems, equipment, utilities and production wells. The system does not cover equipment in con-nection with the cleaning of water used for reservoir water injection.
The system boundary is the injection point.
System 540 - Glycol Circulation and Regeneration
This system covers equipment used for storage, circulation, cooling and cleaning/regeneration of glycol primarily used in connection with the dehydration of process gas. The system boundary with system 220 is the flange on the dehydration tower. Glycol filling is part of this system. Glycol injection for hydrate inhibition is part of system 530.
System 550 - Not in Use (Propane compression and reclaim)
Not in use for existing platforms., information only.The system covers equipment used for storage, compression and recovery of propane used in connection with gas dew point conditioning.
System 560 - Hot Oil
This system covers equipment used for the storage, heating and circulation of oil primarily used for the heating of process gas/oil, or for the heating and evaporation of gases/water from glycol, etc.
Document / Revision No. Owner Approved
2169 / 09 Director-Plant-and-Equipment-Information 11.09.2006
System Number 65 236
System 570 - Seawater
This system covers equipment in connection with the pumping and circulation of seawater pri-marily used to cool produced oil/gas and equipment. Where seawater feeds the fire water sys-tem, the system limit is the isolation valve to the fire water system. Any wash down system on the platform is included, up to the firewater system.
System 580 - Process Inert Gas
This system covers equipment used for the generation, distribution and injection of fire-resistant gases in processing plants and storage tanks. The system also covers equipment for the clean-ing of exhaust gases from combustion engines, boilers and gas turbines used as inert gas.
The system boundary up stream is the inlet XV or flange of the inert gas generator, if it is fed from the instrument air system. The down stream boundary is the injection point.
System 590 - Closed Drains
This system covers equipment for collecting all liquids drained from pressure vessels and lines and returning collected liquids back to production.
System Number 66 236
SYSTEM GROUP 6 - PROCESS UTILITY AND FACILITY SUPPORT
System group 6 contains process utilities indirectly contributing to the processing of oil, gas and NGL.
System 600 - Closed Cooling Water
The system covers equipment in connection with closed cooling-water systems. This type of cooling-water system is primarily used in connection with equipment to which it is necessary to add corrosion-inhibiting chemicals.
Note:
• Cooling-water systems incorporated in other equipment, for example, diesel engines do not belong to this system. They shall be included in the system to which the equip-ment itself belongs.
System 610 - Instrument and Utility Air
This system covers equipment used for the compression, storage, dehydration and distribution of compressed air for process control and workshop use, etc. The system boundary between instrument and utility air is at the block valve which shuts in the utility air on PSLL.
System 620 - Computer System General
This system covers computers/computer systems and shared display facilities with Safety and F&G System used in connection with process monitoring/control and production/ process meas-urement. The system also covers equipment in connection with the monitoring and control of specific equipment (e.g. pipeline compressors). The system may contain the following:
- Crane Load Indicator System, CLI - Digital Control System, DCS
- Environmental/Aeronautical Data System, EDS - Fluke Data Acquisition System, FDA
- Measurement Computer Systems, MCS - Process Control & Safety System, PCSS - Programmable Logic Control systems, PLC - Safety Automation System (SAS)
- Subsidence/Corrosion Monitoring System, SMS/CMI/GPS - Telemetry Control System, TCS
System 630 - Hydraulic Power
This system covers equipment used for the storage of hydraulic oil, and for the generation and control of pressure. The system is primarily used in connection with the operation of actuator-operated valves in process control systems. The system also covers associated back-up equipment such as compressed nitrogen.
System 640 - Steam Generation and Waste Heat Recovery
This system covers equipment for the generation, distribution and condensation of steam for the heating and cleaning of process equipment, etc. The system also covers equipment in which water is used as a medium for the recovery of waste heat from a processing plant.
Document / Revision No. Owner Approved
2169 / 09 Director-Plant-and-Equipment-Information 11.09.2006
System Number 67 236
System 650 - Diesel Fuel
This system covers equipment in connection with bunkering, storage, cleaning and distribution of diesel oil.
System 660 - High Voltage Power Generation and Distribution
This system covers equipment in connection with the generation, distribution and transformation of electric power with a voltage higher than 1000V AC (or 1500V DC), emergency power excluded.
System 670 - Low Voltage Power Generation and Distribution
This system covers equipment in connection with the generation, distribution and transformation of electric power with a voltage lower than or equal to 1000V AC (or 1500V DC), emergency power excluded.
Note:
The boundary between high and low voltage power generation and distribution systems (660 and 670) shall occur downstream the transforming equipment where the voltage is below 1000V.
Cubicles (MCC's) and switchgears/breakers belong to the supplying system, 660 or 670, de-pending on the voltage. MCC equipment linked to and limited to drilling systems should be con-nected to system 960-Rig Electric System, on platforms with separate power generation system for drilling operation.
System 690 - Jet Fuel
This system covers equipment in connection with bunkering, storage, cleaning and distribution of jet fuel.
System Number 68 236
SYSTEM GROUP 7 - SAFETY AND LOSS PREVENTION
System group 7 contains safety systems for personnel and equipment.System 700 - Safety and Loss Prevention Systems General
This system covers equipment not classified as belonging to a certain sub-system. This may be equipment operating several systems within group "7".
System 710 - Water Fire Fighting
This system covers equipment, such as fire pumps, distribution of firewater, fire extinguishing equipment, foam systems and fireman's equipment. The system may contain the following equipment:
- Deluge Systems - Fire Stations
- Firewater Distribution (ring mains, branches, etc.) - Firewater Pumps
- Hose Reels / Hydrants, incl. hydrant cabinets (monitors) - Sprinkler Systems
- Water Spray Foam Systems
The system boundary between 570 and 710 occurs at the block valve between the two systems.
System 720 - Fire Fighting and Passive Fire Protection
This system covers equipment used for the storage and distribution of chemical fire-fighting agents. The system may contain the following equipment:
- Dry Chemicals
- Equipment Fire Protection (vessel support, etc.) - Fire Doors and Fire Rated Windows
- Fire Extinguishers
- Fire Partition Penetrations
- Gas Extinguishing System, incl. Inergen, Co2 etc.
- Structural Fire Protection and Fire Partitions (fire walls) - Structural Water Fill System
- Water, Mist and Fog Extinguishing System
System 730 - Fire and Gas Detection
This system covers equipment used for the detection of open flame, heat, smoke and uncon-trolled gas leaks/releases. Stand alone Fire detection panel and Gas detection panel shall be included in this system.
System 740 - Emergency Power Generation and Distribution
This system covers equipment used for the generation, batteries, uninterruptable power supply (UPS) and distribution of emergency electric power.
System 750 - Safety Shutdown System
This system covers equipment for manually activation of shutdown system, as well as junction boxes and cabinets for safety shutdown systems.
Document / Revision No. Owner Approved
2169 / 09 Director-Plant-and-Equipment-Information 11.09.2006
System Number 69 236
Exception Note:
Gas, heat, smoke and flame detectors including fire alarm buttons (FAB) belong to sys-tem 730.
System 760 - Equipment Remote Alarm and Indication
This system covers critical alarm panel (CAP) and release of fire extinguishing system from the control rooms.
System 770 - Escape and Personnel Safety
This system covers equipment in connection with the evacuation and rescue of personnel. The system may contain the following equipment:
- Breating apparatus equipment - Escape Chutes
- Lifeboat Stations, Incl. Davits - Life Raft Stations
- Mob Stations
- Personal Safety, incl. first aid, eye wash, medical equipment, etc.
- Personal Safety, incl. first aid, eye wash, medical equipment, etc.