Pipe pressure before gas explosions was 12 times too high

  • In this Sept. 13, 2018, file photo, firefighters battle a house fire on Herrick Road in North Andover, Mass., one of multiple emergency crews responding to a series of gas explosions and fires triggered by a problem with a gas line that feeds homes in several communities north of Boston. The pressure in natural gas pipelines prior to a series of explosions and fires in Massachusetts last week was 12 times higher than it should have been. The information was in a letter from the state’s U.S. senators to the heads of Columbia Gas and NiSource. (AP Photo/Mary Schwalm, File)

  • In this Sept. 13, 2018, file image take from video provided by WCVB in Boston, flames consume the roof of a home in Lawrence, Mass, a suburb of Boston. The pressure in natural gas pipelines prior to a series of explosions and fires in Massachusetts last week was 12 times higher than it should have been. The information was in a letter from the state’s U.S. senators to the heads of Columbia Gas and NiSource. (WCVB via AP, File)

BOSTON — The pressure in natural gas pipelines prior to a series of explosions and fires in Massachusetts last week was 12 times higher than it should have been, according to a letter from the state’s U.S. senators to executives of the utility in charge of the pipelines.

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