Pipe, concrete

Stephen Barlas, Washington Editor

The Pipeline and Hazardous Materials Safety Administration says pipelines can use new Polyamide 11 thermoplastic pipe at higher operating pressures than currently allowed starting on Jan. 25, 2009.

Frontier Pipeline LLC, based in Somerset, WI, with engineering/administrative offices in Duluth, MN, recently completed a successful project consisting of two parallel crossings for the installation of 48-inch HDPE pipelines under New Haven Harbor in New Haven, CT.

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