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Fire
& Hydrocarbon Gas Detection System
Client:
Oil & Natural Gas Corporation Ltd. (ONGC)
Place:
Uran
We
have recently implemented a turnkey project covering supply,
installation, integration and commissioning of Fire And Gas
Detection System for oil and gas processing complex of Oil
& Natural Gas Corporation Ltd., at Uran. The project was
completed a month ahead of schedule. We supplied these systems
with technical backup from M/s. Detector Electronics Corporation,
USA. We imported major equipments from Detector Electronics
Corporation. The control system design & Engg was done
by Detector Electronics and the site engg, supply of indigenous
items/equipments etc was carried out by us to put together
a complete system, as per clients need. Our specialized team
of Engineers installed and integrated this system to the existing
DCS system of our client. These services were again part of
the turnkey contract. The site acceptance of the Project was
completed on 6th August 2002.
The
technical brief of the project: -
System
Overview
The Fire & Gas System consist of the following components:
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Infrared Gas Sensor/Detectors
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Digital Communication Units
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Initiating Device Circuit module
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Control Units with necessary software.
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Local Input/Output Unit
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Signal Audible Modules
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Audible/Visual Devices
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Cables / Trays / Ducts & all other required hardware.
Scope
of work
The
turn key responsibility for the project involved Design &
Engineering, Supply, Erection, Integration & commissioning:
| A-
Engineering: |
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To
design Fire & Gas detection System based on fail safe
philosophy and all other referred applicable standards. |
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Finalise
Optimum Location of Fire & Gas detectors. |
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Location
of Junction boxes, power supplies, beacons, hooters etc. |
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Design
& Engineering of trays / ducts and routing. |
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Design
& Engineering for Integration with existing Gas detection
system, outputs required to operate existing Sprinkler
system, serial communication with existing DCS systems. |
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Design
& engineering of custom graphics, reports, device
layouts, etc. |
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Preparation
of all documents, drawings as required. |
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| B-
Supply: |
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Supply
of Addressable Fire and Gas Detection panel with Control
Unit Hardware for Monitoring, Controlling, Data acquisition,
Logic capabilities, alarm, annunciation, Alarm and Event
printing, integration with existing DCS/PLC s. |
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Supply
of Operator Interface station, Operating System software,
Configuration Software, Engineering software, Graphic
software, Printers and the required furniture. |
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Supply
of 180 Nos. of IR Type Hydrocarbon Gas detectors/ Transmitters
& 16 Nos. UV /IR Type Fire Detectors with Communication
Modules. |
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Supply
of all required cables in required quantities. |
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Supply
of cables trays, cable ducts, conduits, supports, brackets,
etc required for laying of cables. |
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Supply
of instrument mounting accessories like pipe stanchions,
brackets, structural supports, cable glands, etc. |
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Supply
of Junction Boxes, Cabinets, MCT Blocks, circuit Breakers,
Hooters, Beacons, Relays etc |
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Supply
of one lot of testing and calibration equipment. |
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Supply
of commissioning spares and consumables. |
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Supply
of Recommended spares & consumables for 2 years operation. |
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Supply
of ten sets of hard copy documentation and 2 sets of softcopy
documentation as required. |
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Supply
of any other Material not listed above but necessary for
completion of the job. |
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| C-
Installation: |
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Installation
of stanchions for all the Gas Detectors Transmitters,
Fire Detectors/Transmitters , Junction boxes, Beacons,
Hooters, etc. including all the necessary civil job. |
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Installation
of new tray/duct/supports for laying of new cables. |
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Installation
of Standalone Panels, Gas Detectors/ Transmitters, Fire
Detectors/Transmitters, Power Supplies, Beacons, Hooters,
Junction Boxes, etc. |
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Laying
of power supply cables, communication cables, signal cable,
control cable, earthing cable and all other necessary
cables. |
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Glanding,
termination of all the cables. |
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Installation
of all the software. |
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Installation
of permanent Tag Plates on all devices in the field and
the panel. Installation of any other sensor, device, hardware
not mentioned specifically but required for completion
of the job. |
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| D-
Commissioning: |
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Calibration
of all the devices. |
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Loop
checking & interlock checking of all the loops from
sensors /transmitters to Gas Detector Panel and DCS. |
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Testing,
Debugging & Commissioning of the Addressable Fire
and Gas Detection System Control Panel. |
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Testing
& Commissioning of the communication link between
Fire and Gas Detection System and DCS System. |
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Site/Field
acceptance test after commissioning of the total system. |
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| E-
Support Services: |
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Training;
conduct a course in device maintenance, hardware maintenance,
software maintenance and diagnostics of the system. |
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Providing
warrantee services for a period of 1 year from date of
commissioning. |
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System
Design and Functions
The
Fire and Gas Detection System as installed consists of a main
control panel, operator interface station, IR hydrocarbon
gas detectors (180 Nos.), UV/IR fire detectors (16 Nos.),
and audible/visual alarms.. In the event of an alarm by the
fire and gas detectors or from the existing fire and gas systems
(As a part of system integration), the system sounds the alarm
signals and activates the outputs to existing sprinkler systems
(Also as a part of system integration). The fire and gas detection
system status is available on the control panel, OIS &
also on the existing DCS systems.
Operator Interface Station
The main function of the Eagle Operator Interface Station
is to display a variety of system status information. Custom
graphic screens are created to display events, real-time status
of all events that are currently active, gateway information,
and programmable device information.
Key Features:
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Accommodates Fire and Gas Detectors and third-party devices
with 4-20 mA or "dry contact" type outputs.
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Accommodates Deluge, Pre-Action, and Gaseous fire suppression
agent release.
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Accommodates Audible/Visual alarm devices.
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Fault tolerant communication loop, 32,500 feet (10,000 meters)
of wiring on each network.
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Software adjustable alarm setpoints.
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Non-volatile memory for alarm and calibration logging.
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Built in system diagnostics.
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Critical alarm response in 1 to 5 seconds.
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Programmable Fire and Gas logic.
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Modbus RTU Master/Slave and Allen Bradley DF1 communication
capability through two electrically isolated RS-232 serial
ports.
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A combination, Fire & Gas Alarm and Shutdown System,
as defined by NFPA-72
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FM Approved as Local Fire Alarm System (NFPA 72)
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FM Approved for gas detection (6310-6320)
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CSA Approved to C22.2 No. 205 (Fire Detection)
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CSA Approved to C22.2 No. 152 (Gas Detection)
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CE Marked for EMI / RFI
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CENELEC Hazardous Location Rating for field devices
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Up to 244 intelligent network devices, fire, gas, etc.,
fully field addressable 500 ms. throughput from detection
to shutdown
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Class A Style "Signaling Line Circuit" (SLC) network,
as defined by NFPA-72, up to 10,000 meters in length
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Utilizing state of the art field bus technology
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All field devices: Class 1, Division 1, Groups B, C and
D
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Comprehensive data acquisition
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Non-volatile memory for local storage of alarm and calibration
data
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Fault tolerant communication loop
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Built-in comprehensive diagnostics, down to the "node"
level
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Sophisticated logic capabilities and easy to use software
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Intelligent IDC modules for contact inputs
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Unitized UV and UV/IR Flame detectors with integral communication
capabilities
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Intelligent ARM modules for LON based releasing outputs
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Intelligent SAM modules for LON based outputs
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Sensor sensitivity trending
Codes
& Standards
The
installed system conforms to the following standards, codes
and recommended practices.
Application
The
Det-Tronics Eagle Quantum is a state-of-the-art Fire &
Gas System consisting of any combination of addressable flame,
gas, environmental detectors, and any other devices with 4-20
mA or contact outputs. The Eagle Quantum system communicates
to operator stations or other host devices through two isolated
RS232 serial ports utilizing Modbus RTU or Allen-Bradley DF1
protocols to make the system's data available to a variety
of host devices. The information made available to host devices
includes comprehensive diagnostic information on each field
device along with their input and output status.
For
detailed specifications on Detronics product visit website
www.detronics.com
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