Underground Construction - April 2018 - 4

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APRIL 2018 | UConOnline.com

Fiber Optic Sensing Association Releases Installation
Considerations for Pipelines
The Fiber Optic Sensing Association (FOSA),
the world's premier trade association for
distributed fiber optic sensing (DFOS),
released FOSA Installation Considerations for
Pipelines, offering guidance on the selection
and positioning of fiber optic cables to maximize the benefits of DFOS along pipelines. Download the publication from the website: fiberopticsensing.org and select
Installation Considerations from the "Resources" tab in the top/right menu.
Fiber optic sensing is an emerging and key technology for advancements in the
safe and efficient operation of pipelines throughout the world.
"As the market learns of the benefits provided by distributed fiber optic sensing,
a natural extension is to ask about the make-up and installation of installed sensing
solutions. This document provides a primer for those considering adoption of this
capable technology to advance the operation and safety of their pipeline assets,"
said Dr. Chris Minto, chair of the FOSA Technology Committee, which produced the
publication.
The document addresses three of the primary DFOS technologies that are often
used in monitoring pipelines, each providing unique insights into the operational
characteristics, asset health, and environmental conditions of the pipeline:
* Distributed Acoustic Sensing (DAS) is used to sense both leaks and third-party
intrusion by monitoring vibrations near the pipeline.
* Distributed Temperature Sensing (DTS) monitors the subtle temperature variations
that occur from product escaping from the pipeline. Release of high-pressure gas
will lower the surround temperature due to the sudden reduction in pressure as it
leaves the pipeline, where oil typically has a higher temperature than the surrounding soil.
* Distributed Strain Sensing (DSS) is deployed along or on the pipelines to monitor
changes in strain that might be caused by shifts in the soil near the pipeline. If the
strain from these soil shifts gets large enough, it could cause the pipeline to shift,
possibly buckle and even break, allowing product to escape.
"FOSA Installation Considerations for Pipelines condenses considerable technical
information into an 11-page primer providing guidance to end users, installation contractors, regulators and other industry bodies," said Mark Uncapher, director of FOSA.
"Federal and state pipeline regulators will benefit from this guidance, as well. As they
work to ensure the safe operation of U.S. pipeline infrastructure, basic knowledge on
the proper installation of fiber optic sensing technology should assist them."
FOSA is a non-profit organization with the mission of educating industry, government and the public on the benefits of fiber optic sensing to securing critical facilities,
enhancing public safety and protecting the environment.

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Underground Construction - April 2018

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