Page 129 - Pipeline Pigging Technology

Pipeline Pigging Technology

summary of CP potential;
summary of pipe-wall anomalies (revealed by internal inspection).

In addition, results from different campaigns or from different inspection
types can be presented on a comparison chart. Comparison charts available
include:

comparison between summary charts (Fig. 6);
comparison between ROV and/or acoustic alignment sheet;
suspension history (Fig.7).

Those programs can require a longer processing period; therefore to avoid
locking the users terminals they can be run as background tasks, the results
being sent to either the printer or a plotter, or kept in a file. In this way the
user is able to continue using the terminal for other functions while the
analysis is being carried out.

Database maintenance

This category of function has the highest security classification on the
system as it contains the functions used to maintain the integrity and flexibility
of the database. It is the only category which allows users to delete a complete
hierarchy of data items, e.g. a pipeline or a complete inspection.
Users in this category are responsible for maintaining the libraries and for
allocating system parameters and security classifications.

System software selection

Prime being the selected computer hardware it was therefore desirable to
select Prime Systems' software if this could meet the needs of CIS-PIPELINE.
This would minimize any third-party involvement in order to ensure future
compatibility of hardware and software.
DBMS, Prime's Codasyl database management system, was selected as it
would easily map the network and hierarchical structures of the pipeline
inspection data. It was also capable of giving fast access to the large amount
of data involved. In addition it has a query and report generator (DISCOTER)
which could be used for ad hoc enquiries.
In general the Prime PT2OO terminals are used for standard editing and
reporting. However the system also includes a number of graphical reports
and analyses which are displayed online using the Tektronix 4107 terminal.

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