Underground Construction - February 2020 - 32
A self-propelled robotic
sandblasting head which
workers named "The Beast."
REHABTECHNOLOGY
Jeff Griffin | Senior Editor
New Record for Gas Main Relining
With rehabilitation of a 620-foot-long segment of 42-inchdiameter gas main last summer, New Jersey contractor
Progressive Pipeline Management (PPM) broke its own world
record for the largest size natural gas pipe to be rehabilitated
with Starline cured-in-place pipe (CIPP) liner.
Location of the project was East Orange, N.J., in a highly
congested area with multiple freeways, underpasses and a hospital.
The project owner was Public Service Electric & Gas (PSE&G).
CIPP lining has become common for sanitary sewer rehabilitation, but the lining materials used for this work is unable to
withstand the high pressures of natural gas lines. The Starline
liner used on the record-setting project was developed specifically
32
FEBRUARY 2020 | UConOnline.com
for lining high-pressure pipes, said David Wickersham, CEO of
Progressive Pipeline Management.
The rehabilitated cast iron gas line running along Central
Avenue in East Orange had multiple grade changes, seven offsets
and material changes from cast iron to steel. It travels 80 feet
directly down an embankment and then crosses under the Garden
State Parkway and back up the other side to street level. Central
Avenue is 25 feet higher than the parkway.
"In the dense area of the East Orange project location," said
Wickersham, "there was no viable alternative to trenchless rehabilitation for renewing this gas main. In many of the urban, historic, paved
and high-traffic areas where PPM is called in to solve a problem, the
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Underground Construction - February 2020
Table of Contents for the Digital Edition of Underground Construction - February 2020
Contents
Underground Construction - February 2020 - CT1
Underground Construction - February 2020 - CT2
Underground Construction - February 2020 - FC
Underground Construction - February 2020 - IFC
Underground Construction - February 2020 - Contents
Underground Construction - February 2020 - 4
Underground Construction - February 2020 - 5
Underground Construction - February 2020 - 6
Underground Construction - February 2020 - 7
Underground Construction - February 2020 - 8
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Underground Construction - February 2020 - IBC
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