Page 405 - Pipeline Pigging Technology

Pipeline Pigging Technology

Fig.l. Symmetric piggable wye.
a pig receiver. The product was then inter-connected with another pipeline
and a launcher was used to allow the next segment of pipeline to be pigged.
In some instances, the sole purpose of the platform and risers is to allow two
pipelines to be inter-connected while maintaining the piggability of both
pipelines. One of the biggest future uses for piggable wye fittings will be the
elimination of such high-cost facilities associated with gathering systems.
The feasibility of manufacturing piggable wye fittings for high-pressure
applications is now well established. However, there has been very little
information published relative to the performance of typical construction,
production and inspection pigs required to pass through piggable wye
fittings. The availability of such performance data on the characteristics and
limitations of piggable wye fittings will be useful for designing and evaluating
future applications.
The results presented in this paper give quantitative performance charac-
teristics for the following specific pigs:

1. TDW Redskin foam pig
2. Knapp Polly Pig foam pig
3. F.H.Maloney inflatable sphere
4. Select Industries soluble sphere
5. TDW dual-diameter (14 x 10) scraper pig
6. Knapp Polly Pig dual-diameter (14 x 10) gauging pig
7. S.U.N.Engineering squeegee (cup-type) pig
8. VetcoLog intelligent pig

386