Instrumentation System Overview
Petroleum plant shall have instruments for measurement and control
that are of field proven design and high quality.
The various instruments involved mainly cover the following:
- Flow Instruments: Integrated orifice plate, senior orifice fitting, restriction orifice, multivariate flow transmitter, coriolis meter, V-cone meter
- Level Instruments: Level gauge glass, displacer (external) type, float type for level transmitter and level switch
- Pressure Instruments: Electronic pressure transmitter, pneumatic pressure transmitter, pressure switch, pressure gauge, pressure indicating controller, pressure differential indicator
- Temperature Instruments: Electronic temperature transmitter, temperature gauge, temperature switch
- Fire and Gas Detectors: IR3 Flame detectors, UV/IR Gas detectors, Fusible plug
- Valves: Control valve, solenoid valve, on/off valve/actuator, pressure safety valve, pressure regulator valve
- Miscellaneous: Instrument cables/Trays & accessories, instrument mounting/hook-up accessories, power supply distribution facility, multi-cable transit block, instrument calibration/maintenance tool, etc.
Instrumentation in Package Unit
Instruments for package units shall fully follow the guidelines,
philosophy and standards that defined in this specification for selection,
design, and installation.
The instrument package vendor shall fully equip all related
instruments and control, and services necessary to ensure the delivery of a
fully operational package. Package vendor shall be responsible for the project
liaison and detailed engineering of all his equipment, instrumentation, and
materials manufacturers, fabrication, assembly, calibration, and their quality
of workmanship in complying with this specification.
Hazardous Areas
All instruments located in hazardous areas shall be certified &
approved for use in accordance with the applicable area classification. All outdoor instruments and related equipment
shall as a minimum be certified to NEMA 7 for installation in API 500 Class I,
Division 1 hazardous area, or Division 2 as required by classification
drawings.
The vendor must provide test certificates & approval certificates
from statutory authorities like UL or FM for all instruments and related
equipment as applicable for weather protection or for their use in hazardous
areas.
Environmental Protection
All instruments, enclosures and related equipment installed in open
areas of the facilities must be certified to NEMA 4X for weatherproof
requirement. All field instruments and associated equipment shall be
manufactured of materials suitable for service under the specified
environmental conditions over the design period. All field instruments,
structural supports and frame works manufactured of carbon steel.
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