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Title: Pigging as a flow assurance solution: estimating pigging frequency for dewaxing
Category: Technical papers from Pipeline World
Downloadable: Yes 
Project No.:
Research Agency:
Catalog No.: 839
Date of Publication: April 2004
Price: $25.00 US
Authors: Dr Aiden O'Donoghue
Abstract: Pigging is used widely ofr removal of wax build-up on the internal wall of a pipeline. Much information is available on the prediction of wax deposition levels in such lines and pigsplay an important role in the removal of this expected wax accumulation. Although these tools are generally much cheaper than chemicals for wax inhibilitation or suppression, there is very little guidance available for the selection of the correct pig, the sizing of by-pass ports and the pigging frequency. Incorrect selection can be dangerous, since a significant build-up of wax ahead of the pig can plug the pipeline, leading to extended downtime and an expensive pipeline repair.
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