Volume-II of IV - GAIL

1.0 INTENT
2.0 OBJECTIVE
SPECIFICATION FOR CALIPER PIGGING
The intent of this specification is to setforth the requirements of the
caliper pigging. The specification is not intended to be all-inclusive and the
use of this specification will not absolve the contractor of his responsibility
of generating valid, interpretable and physically verifiable data.
The objective of the present pigging programme to access the internal
geometry of the following pipelines and detect significant geometry
defects if any, which may affect safe operation of the pipeline.
The relevant technical specifications of the pipeline including launcher and
receiver details in the Annexure.
3.0 SCOPE OF WORK
To achieve the above objective, contractors SCOPE OF WORK includes
running of adequate numbers of foam pigs, cleaning pigs (magnet, brush,
commination of brush and magnet, scraper, pin wheel etc.), gauge pig
and caliper pig.
Further the scope of work comprises supply of skilled personnel, all
equipment e.g. foam pigs cleaning pigs, gauging pig, caliper pigs, pig
locating and pig tracking devices, spares consumables, communication
and transportation including their mobilisation and demobilisation. It is
expressly understood that this do not limit the scope of work of the
CONTRACTOR in any way. The quantities to be mobilized for different
equipment (different types of pigs pig tracking device, marker device)
accessories, spare and consumables need to be carefully evaluate by the
CONTRACTOR taking in to the consideration that caliper pigging of various
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