Instrumentation

The activities for instrumentation includes:

1. Drawings Preparation

   • Preparation of P & I diagrams.
   • System Design.
   • Cost Estimation.
   • Preparation of instrument specifications.
   • Design & layout of central control room.
   • Design of Alarm, Interlock and Logic circuits.
   • Preparation of loop schematics / Hook up diagram.
   • Orifice plates and control valve sizing.
   • Instrument schedule.
   • Installation drawings.
   • Bill of Erection materials and accessories.
   • Schematic arrangement of Instrument power distribution.
   • Schematic arrangement of junction boxes for cables and tubes.
   • Location arrangement drawings of field mounted Instruments and JB.
   • Layout of Instrument Cables and Tubes

2. Vendor inquiry – Selection / Negotiation and placement of order for Erection material.

3. Progress, follow up and inspection.

4. Installation, supervision and commissioning.

   
   

   During the last one decade Instrumentation concept has undergone a revolutionary Change for conventional pneumatics and hydraulics to electronics and microprocessor based systems and computer technology. Our personnel have kept pace with all these latest trends in technology. Our personnel are familiar in usage of:

   • Smart Instruments
   • Interfacing smart instrument with computers/DCS
   • Programmable logic controllers for sequencing & interlocks
   • Data acquisition systems

Our supply procedure starts with the supply department communicating with relevant manufacturer / trader and agreeing terms to achieve the best possible purchase cost price for the business. When a client has a requirement for a specific product we initiate Requests for Proposals (RFP).

1. We supply each and every instrumentation goods along with all accessories such as:

   • Temperature Sensor
   • Pressure Sensor
   • PLC (Programmable Logic Controller)
   • DCS (Distributed Control System)
   • Actuators
   • Contactors
   • Valves
   • Gauges
   • Automation Instruments
   • Flow Transmitters
   • Level Transmitters
   • Analytics (Gas / Liquid)

2. A typical supply process includes:

   • Identifying the needs of goods
   • Finding suppliers
   • Requesting proposals/quotations (RFP/RFQ)
   • Price comparison
   • Negotiating with suppliers
   • Fulfillment capabilities
   • Agreeing terms with suppliers
   • Arranging and dispatching goods
   • Performing quality assurance
   • Arranging inspection and analyzing results
   • Quality assurance of goods

Erection team consists of qualified Engineers and Supporting Staff; they include Supervisors, Foremen, Technicians, Store Keepers and Accountants etc.

1. Erection services include:

   • Supply of erection material
   • Inspection
   • Field engineering of Junction Box locations, Cable tray routing, Instrument support and as built drawing
   • Installation of main and branch cable ducts and trays, Excavation of Trenches etc.
   • Installation of main air piping
   • Installation of instruments and its supports
   • Impulse piping and tubing
   • Main cable and branch cable laying and termination
   • Installation of control panels, PLC panels, Marshaling racks, DCS consoles and its auxiliary activities
   • Calibration of instruments
   • Testing of impulse and airline piping
   • Testing of cables
   • Loop checking of the system
   • Commissioning assistance

Typically, Calibration of an instrument is checked at several points throughout the calibration range of the instrument. The calibration range is defined as “the region between the limits within which a quantity is measured, received or transmitted, expressed by stating the lower and upper range values.” The calibration range may differ from the instrument range, which refers to the capability of the instrument.

Our Calibration Management System:

1. Each instrument has:

   • Unique identification
   • A recorded history and current calibration status
   • Use appropriate for the function of the instrument

2. Calibration Procedure:

   • Approved procedures for calibration
   • Schedule for calibration
   • Process range limits

3. Calibration standards and test equipment:

   • Must be more accurate than the required accuracy of the instrument
   • Traceable back to national or international standards

4. Personnel:

   • Appropriate trained for calibration
   • Performs within an established management process