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

engineering of metering skid complete with all accessories,.
3.1.2 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:
• Job Specification for gas metering package
• Data Sheets, Typical P&ID' s
• 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.
3.1.3 This document provides in detail, the minimum qualitative requirements of most of the instruments. For
instruments, where no such requirements are indicated in this document, the bidder shall submit the same
for GAIL’s approval.
3.2 CODES AND STANDARDS
3.2.1 Design and terminology shall comply, as a minimum, with the latest edition prior to the date of bid enquiry
of following codes, standard practices and publications:
AGA American Gas Association, Gas Measurement Committee
Report No.3 – Orifice Metering of Natural Gas.
Report No.7 - Measurement of Gas by Turbine Meters.
Report No.9 - Measurement of Gas by Ultrasonic Meters
ANSI / ASME American National Standards Institute/ American Society of Mechanical Engineers.
B 1.20.1 Pipe Threads.
B 16.47 Steel Pipe Flanges and Flanged Fittings.
B 16.20 Ring Joint Gaskets and Grooves for Steel Pipe Flanges.
ANSI/FCI American National Standards Institute/Fluid Controls Institute
70.2 Control valve seat leakage classification.
API American Petroleum Institute
RP 520 Sizing, selection and installation of pressure relieving system in refineries.
Part-I - Sizing and selection
Part-II - Installation
RP 521 Guide for pressure relieving and depressurizing systems
P 526 flanged steel safety relief valves.
RP 527 Seat tightness of pressure relief valves .
MPMS Manual of Petroleum Measurement Standards.
RP 551 Process Measurement Instrumentation.
Part 1 - Process Control and Instrumentation
RP 552 Transmission Systems
S 1101 Measurement of Petroleum liquid hydrocarbon by Positive Displacement meter.
S 2000 Venting Atmospheric and low pressure storage tank.
S 2534 Measurement of liquid hydrocarbons by turbine meter systems.
S 670 Vibration, Axial-Position and Bearing-Temperature Monitoring Systems.
ASTM American Society for Tests and Materials.
BS British Standards
BS-1042 Measurement of fluid flow in closed conduits.
BS-4368 Compression coupling for tubes.
BS-4800 Colours for ready mixed paint.
BS-5308 Part-2 Specification for PVC insulated cables.
BS-6364 Specification for valves for cryogenic service.
BS-7244 Flame Arrestors for general use
DIN-43760 Temperature vs Resistance curves for RTDs.
DIN-19234 Electrical Distance Sensors; DC interface for Distance Sensor and Signal