Special study
Subtitle: pipeline excess flow valves
By: National Transportation Safety Board
Publisher: The Board; National Technical Information Service, distributor]
Published: 1981
Place of publication: Washington, D.C; [Springfield, Va
Language: eng
Number of pages: 40
Subjects: Natural gas -- United States -- Pipeline failures; Pipelines -- United States -- Accidents; Pipelines -- United States -- Safety measures
Other titles: Pipeline excess flow valves
Notes: Cover title

"NTSB-PSS-81-1."

Includes bibliographical references