Volume-II of IV - GAIL

MECON LIMITED
REGD. OFF : RANCHI (BIHAR)
PROCESS & PIPING
DESIGN SECTION
NEW DELHI
STANDARD SPECIFICATION
TITLE PIPELINE PRE-COMMISSIONING SPECIFICATION NO. PAGE 3 OF 8
AND COMMISSIONING OF
PIPELINE PROJECT MEC/S/05/62/61 REVISION – 1
3.0 THE WORK
The work to be performed by the Contractor shall consist of the following
activities :
Pre-commissioning : Entire pipeline project shall be checked with respect
to latest P&ID’s and other design specification.
Dewatering : Removal of hydrotest water from the entire pipeline
network system.
Swabbing : Reducing the amount of remaining water in the
main pipeline system which is left behind after
completion of the dewatering operations to make
the pipeline free of water.
Inertisation : Inertising the entire pipeline with nitrogen.
Commissioning : Charging the entire pipeline network with the
product and achieving normal operating conditions
of the pipeline.
4.0 PRE-COMMISSIONING CHECKS
4.1 The pre-commissioning checks shall be carried out for the pipeline to ascertain
that the pipeline system has been mechanically completed in all respects.
These checks shall cover the main pipeline including distribution network
system and sectionalising valve stations. The pre-commissioning checks shall
include the following:
i) System Checks
The entire facilities shall be checked against the latest P&ID’s and other
design specification codes.