Page 76 - Pipeline Pigging Technology

Pre-tnspection-survey activities

the inspection survey is carried out as a service-type operation, for
which the contractor makes available the equipment and personnel
to execute the task;
the equipment produces electronic data;
the contractor's costs include:
preparation of the inspection pigs;
transporting equipment and personnel, including lodging;
making available the equipment and personnel for the duration
of the contract;
processing the electronic data into a final inspection report;
research and development;
overhead and profit.

Job planning

Planning an inspection-survey contract usually includes:

- pre-survey meeting;
- mobilization of equipment and manpower;
- pigging in three stages:
1) run bi-di type pig with gauge plate;
2) run electronic geometry pig;
3) run corrosion-detection pig.
The planning of the job may be such as to require all the
equipment to be mobilized for each pipeline, in which case stand-
by costs will have to be charged in case stages 1 or 2 prove that stages
2 or/and 3 can not be undertaken without further preparation.
In case of doubt on the results of stages 1 or 2, the job may be
costed to allow separate mobilization after completion of each
stage.

- initial report;
- verify initial report (dig up);
- final report.

The contractor may be depending on the client for import/export facilities
and local transport in certain countries. Stand-by rates apply in case of
exceeding the basic time.

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