scope of work & specification - GAIL (India) Ltd.

1.0 GENERAL
1.1 This document describes in detail the scope of work, supply and responsibilities of bidder for procurement
of natural gas metering skid of different capacities for inventory creation and for various consumers. These
skids will be installed at different GAIL sites as and when required. In this contract Ultrasonic Meter based
metering skid is envisaged;
Ultrasonic Meter based metering skids are for Gas despatch stations for Gas consumers consisting of skid
mounted Gas filtration, Pressure Let down, and Gas Metering (Ultrasonic meters) with Gas chromatograph
and with control panel installed in the control room. Metering supervisory system is also envisaged to be
mounted in Control Panel.
1.2 The description and requirements contained in this specification are concise by necessity and cannot
include all details. However, it is the responsibility of the bidder to execute the job on a turnkey basis in
accordance with the specifications and internationally recognized good engineering practices .
1.3 Any activity specifically not listed in this document, does not absolve the bidder of their responsibility to
include such activities in their scope of work and supply, which otherwise is necessary, to complete
instrumentation work for the project. All such activities shall be carried out by the bidder without any
implication.
1.4 In the event of any conflict between these specifications, related standards and codes, any other
attachment to this package, the bidder shall follow the following documents in the order of their
priority:
a) Job Specification for gas metering package
b) Data Sheets, Typical P&ID' s
c) Standard specifications and standards
In case of any conflict in various documents, same shall be referred to GAIL for clarification. Bidder shall
not proceed without getting written approval in such a case
2.0 SCOPE OF WORK & RESPONSIBILITY
2.1 SCOPE OF WORK
2.1.1 Bidder shall be responsible for execution of the package on turnkey basis with scope of work as listed
below but not limited to the following :-
i) Design and Engineering
ii) Procurement/Supply, Inspection, Factory testing and Acceptance
iii) Supervision for Installation, field calibration/testing and commissioning.
2.1.2 Design and Engineering
(a) Owner shall provide the bidder with this bid package consisting of typical Piping & Instrumentation
Diagrams and process data sheets. The bidder shall be responsible to carryout the design and
detailed engineering based on the data provided in the bid package and in line with other technical
requirements specified elsewhere in this document. Scope shall also include sizing and sizing
verification for all items including where data is dependent upon detailed engineering, detailing of
basic engineering designs, preparation of data sheets, coordination drawings for instruments and
system oriented items, engineering drawings etc.
(b) Residual Engineering
The bidder shall also be responsible for carrying out any residual basic engineering necessary for
proceeding with detailed engineering like instrument sizing, utility consumption, specifying derived
data in process data sheets, type and material selection of instruments wherever required.
c) Control Room Engineering
For Supervisory monitoring and control a SCADA system is envisaged to ensure effective and reliable
control, management and supervision of the consumers from centralized location. The SCADA
system along with RTUs shall be provided by M/S GAIL through their separate Bidder and is not in
the scope of supply of the bidder. However the bidder shall be responsible for configuring their
systems and.providing all the necessary details of their systems to the SCADA vendor. All the skid
data (like flow, pressure, temperature, Diff Pressure, valve position etc.) of the supplied skid shall be
accessible from GAIL’s SCADA .through GAIL’s RTU and GSM modem supplied with the control
panel by the bidder.