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Title: The State Of The Art Of Drying Large Diameter Gas Pipelines After Hydrotest
Author: Marvin D. Powers
Source: American Gas Association 1982
Year Published: 1982
Abstract: This paper discusses methods of drying large diameter natural gas pipelines to avoid operational problems created by water left in the line after hydrotest. This problem is compounded by the fact that high pressure, dry natural gas is no longer being used to dewater and dry these large diameter lines. The drying methods discussed include the dry air methods currently used to dry small diameter petro-chemical pipeHnes and how these methods could be adapted to natural gas lines. The art of using dry air to dewater and dry large diameter pipelines is in its infancy, but additional knowledge will soon be gained as some of these lines are scheduled to be dried in 1982. This paper also discusses potential dewatering problems as well as advantages of cleaning a pipeline.

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