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51315-5776-The Long-Lasting Operation of Cleaning and Inspecting a Pipeline with Black Powder Issues

Picture for The Long-Lasting Operation of Cleaning and Inspecting a Pipeline with Black Powder Issues
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Product Number: 51315-5776-SG
ISBN: 5776 2015 CP
Author: Helene Sirnes
Publication Date: 2015
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The pipeline has been in operation since 1983 andtransports a fluid rich on hydracarbons but low in water dew point within the specifications for dry gas. A cleaning program was identified from the start.In the beginning there were no operational pigging challenges a black slurry was cleaned out of the pipeline approximately every two years. After twenty years of service the slurry suddenly changed to powder causing operational powder issues in addition to the environmental challenges with the powder itself.The powder is both pyrophoric and classified as LRA (Low Radioactive). This change in the pigging residue was the start for many years of studies modifications planning of cleaning performing the long cleaning operation and in the end – inspection of the pipeline to see the condition.This paper tells the story from the powder was first discovered the actions taken to manage the powder the cleaning of the pipeline and the recent inspection results.
The pipeline has been in operation since 1983 andtransports a fluid rich on hydracarbons but low in water dew point within the specifications for dry gas. A cleaning program was identified from the start.In the beginning there were no operational pigging challenges a black slurry was cleaned out of the pipeline approximately every two years. After twenty years of service the slurry suddenly changed to powder causing operational powder issues in addition to the environmental challenges with the powder itself.The powder is both pyrophoric and classified as LRA (Low Radioactive). This change in the pigging residue was the start for many years of studies modifications planning of cleaning performing the long cleaning operation and in the end – inspection of the pipeline to see the condition.This paper tells the story from the powder was first discovered the actions taken to manage the powder the cleaning of the pipeline and the recent inspection results.
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