Gas & Flame Detection in Floating Production Storage & Offloading Units (FPSO)
Gas detection and flame detection safety solutions for the oil and gas industry
Keeping Offshore FPSOs Safe
Offshore floating production storage and offloading units (FPSO) require gas detectors and flame detectors to protect personnel, equipment and the installations themselves. The potential for gas leaks is great, as many types of gas leaks are possible, including hydrocarbons, hydrogen, hydrogen sulfide and more. Each type of gas leak presents its own set of risks. Combustible gas leaks present the additional risk of fire if not detected early and before ignition occurs. Both gas detectors and flame detectors must be able to function under challenging environmental conditions, including harsh winds and extreme temperatures. Emerson offers a variety of Rosemount™ gas monitoring and detection products including ultrasonic leak detection, open path gas detection, point gas detection and wireless gas detection. A combination of these gas detection products along with Rosemount flame detectors, can help keep personnel and equipment in offshore applications safe.
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Product Solutions
The Rosemount Incus Ultrasonic Gas Leak Detector utilizes four ultra-sensitive acoustic sensors that constantly monitor wide areas for ultrasound generated from the release of pressurized gas. Ideally suited for monitoring well-ventilated outdoor environments, the ultrasonic gas leak detector has been engineered to withstand the most extreme conditions and is unaffected by inclement weather, wind, leak direction, and gas dilution or stratification.
- Instantaneous response to all gas leaks (toxic gases, combustible gases or inert gases)
- No calibration required
- Quad sensing heads provide the widest overall gas detection range available on the market: 2 to 40 meters (7 to 130 feet)
Mounting
AISI 316 Stainless Steel (included)
Power Supply
15 - 30 Vdc (24Vdc)
6 W - standard operation
6 W - standard operation
Certifications/Approvals
IECEx ITS 10.0004X
ATEX Ex d ib IIB+H2T4 Gb (Tamb -40 °C to +85 °C); (Tamb -55 °C to +85 °C) option
c FM us CL1 Division 1, GP B, C, D T4
CL1 Zone I, AEx/Ex d ib IIB+H2 T4
EAC RU C-GB.ГБ04.B.00297
KOSHA: 14-KB4BO-0294X
INMETRO UL-BR 15.0063X
ABS: 13-LD1021861
DNV: A-13745
SIL 2 suitable
EMC: EN 50270 2006, EN 61000-6-3 2007, EN 61000-6-2 2005
ATEX Ex d ib IIB+H2T4 Gb (Tamb -40 °C to +85 °C); (Tamb -55 °C to +85 °C) option
c FM us CL1 Division 1, GP B, C, D T4
CL1 Zone I, AEx/Ex d ib IIB+H2 T4
EAC RU C-GB.ГБ04.B.00297
KOSHA: 14-KB4BO-0294X
INMETRO UL-BR 15.0063X
ABS: 13-LD1021861
DNV: A-13745
SIL 2 suitable
EMC: EN 50270 2006, EN 61000-6-3 2007, EN 61000-6-2 2005
The Rosemount 928 Wireless Gas Monitor detects hydrogen sulfide (H
2S), carbon monoxide (CO), and oxygen depletion (O
2) in remote applications previously too challenging and costly to monitor. This wireless toxic gas monitoring system enhances worker safety through early gas leak detection, simply integrates with
WirelessHART® technology, and eliminates the need for expensive wiring. The Rosemount 928 Wireless Gas Monitor easily connects to the Rosemount 628 Universal Gas Sensor which consists of a tool-less-hot-swappable smart sensor module.
- Hot-swappable electrochemical sensor module with end-of-life diagnostics can be installed in the field without tools
- Replaceable, intrinsically safe lithium-thionyl chloride power module has over two years of service life and can be easily exchanged in hazardous field locations
- WirelessHART technology is secure, cost-effective and delivers >99% data reliability
Operating Temperature
H2S: -40 °F to +122 °F (-40 °C to +50 °C)
O2 Depletion: -22 °F to +122 °F (-30 °C to +50 °C)
CO: -22 °F to +122 °F (-30 °C to +50 °C)
O2 Depletion: -22 °F to +122 °F (-30 °C to +50 °C)
CO: -22 °F to +122 °F (-30 °C to +50 °C)
Update Rate
1 second to 60 minutes, user selectable
Time Constant / Response
H2S:
- T20 < 8 seconds
- T50 < 10 seconds
- T90 < 45 seconds
- T90 < 15 seconds
The Rosemount 935 Open Path Combustible Gas Detector provides continuous monitoring for hydrocarbon gases, even in harsh environments where dust, fog, rain, snow or vibration can cause high amounts of obscuration. This combustible gas detector utilizes infrared technology and has long range detection up to 660 ft (200 m). Worldwide approvals for the Rosemount 935 Open Path Combustible Gas Detector include ATEX, IECEx, FM/FMC, INMETRO, TR CU, and SIL 2 (TÜV).
- Accurate, high speed response time (< 3 seconds)
- High immunity to false alarms
- Heated optics for use in extreme environments
Time Constant / Response
T90≤ 3 Seconds
Sensitivity Range
0-5 LEL.m methane and propane
0-8 LEL.m ethylene
0-8 LEL.m ethylene
Spectral Response
2.0 - 3.0μm
The Rosemount 936 Open Path Toxic Gas Detector provides continuous monitoring for hydrogen sulfide (H
2S) gas or ammonia (NH
3) gas, even in harsh environments where dust, fog, rain, snow or vibration can cause a high reduction of signal. This toxic gas detector utilizes ultraviolet technology and has long range detection up to 200 ft (60 m). Worldwide approvals for the Rosemount 936 Open Path Toxic Gas Detector include ATEX, IECEx, FM/FMC, INMETRO, TR CU, and SIL 2 (TÜV).
- High immunity to false alarms
- Heated optics for use in extreme environments
- Built-in data logger (records up to 100 events)
Time Constant / Response
T90 ≤ 3 Seconds
Sensitivity Range
0-500 ppm.m
Spectral Response
200-300nm
A multi-spectrum infrared flame detector specifically designed for the detection of hydrocarbon and hydrogen flames.
- Multi spectrum design for detection of hydrocarbons and hydrogen flames with high false alarm immunity
- Six sensitivity levels, adapting to any application
- High speed response time under 20 msec
Communication Protocol
Optional HART™ communications on the 0-20 mA analog current (FSK) - used for maintenance, configuration changes and asset management, available in mA source output wiring options. RS-485 Modbus compatible communication link that can be used in computer controlled installations
Ambient Temperature
Operating & Storage: -76 °F to +185 °F (-60 °C to +85 °C)
Enclosure Rating
Stainless Steel 316L with electro polish finish
Heavy duty copper free aluminum (less than 1%), polyurethane painted
Heavy duty copper free aluminum (less than 1%), polyurethane painted
