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Title: Pipeline isolation - available options and experience
Category: Pigsource Papers
Downloadable: Yes 
Project No.:
Research Agency:
Catalog No.: pg3063e
Date of Publication: 1990
Price: $25.00 US
Authors: A Barden
Abstract: In early 1989, new guidelines were introduced to the North Sea oil and gas industry covering the requirement for and positioning of top-of-riser ESD valves. The purpose of these valves is to prevent loss of product from the pipeline in the event of topsides' failure, etc.

As such, many operators had to look at either fitting new valves or repositioning existing valves. The options available for doing this and the method of determining the most suitable solution depend upon a number of factors. Various scenarios can be considered, and the advantages and disadvantages of alternative solutions examined.

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