Underground Construction - July 2018 - 30

CIPL Project Sets World Record
from maintaining pressure and
completing the liner installation, creating a serious threat to
the project schedule with colder
temperatures expected soon.
After carefully retracting the
liner from the main, the PSE&G
team considered its limited options. One was to gas-in the entire 2,000-lf section of 36-inch
main while allowing the leaks
to continue in the unfinished
segment 2. Another option
would be to relay that segment
until trying to line it again in
the spring. Those measures
were avoided, however, when
Karl Weiss agreed to manufacture an emergency replacement
liner - manufacturing it, clearing customs and delivering it to
South Orange in only two-anda-half weeks.
The PSE&G team modified
its design with additional tail

bolts and worked nonstop
to install the liner within
24 hours after it had been
delivered. PSE&G gassed-in
the lined main on Nov. 20, as
winter weather was
approaching.

Rising U.S. tide for
Starline

Wickersham started PPM
about 15 years ago after acquiring it from a Philadelphia
company and coordinating the
license agreement for Starline
CIPL with Karl Weiss. In those
days, a "large-diameter" project
was a 12-inch pipe. Successful
completion of 16- and 20-inch
renewals were key milestones,
but demand grew slowly.
"It has really come on in the
last decade, and all the testing
that's been done on the product has helped us find a sweet

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spot for large-diameter cast
iron in the past five years,"
Wickersham said.
Most notably, the Starline liner underwent 10
years and $14-million worth
of testing with the federal government's Pipelines &
Hazardous Materials Safety
Administration (PHMSA),
Cornell University, and NYSEARCH. This independent
testing, in live pressurized
pipe, determined a 100-plus
year's lifespan for the product. Although PHMSA did
not take any action at the
federal level, it indicated that
it would not oppose decisions
by state regulators to allow
use of the liner technology as
a replacement, versus taking
out cast iron. Massachusetts,
New York and Pennsylvania
have already made this deter-

mination, which could make
it significantly less expensive
for utilities to use liner as
replacement.
"It's an important change,
because it allows gas utilities in those states to line
the pipe now and consider
it a composite pipe, so the
gas utility can capitalize that
cost, maybe with rate case
relief, rather than considering it as a maintenance cost,"
Wickersham said.
"From National Grid's perspective alone, one study we
have heard about was that
if they were to remove and
replace all of their cast iron,
it would cost them about $6
billion over the next 10-to-15
years," he added. "So this technology certainly has a place in
their strategy to handle their
cast iron reduction mandates

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Underground Construction - July 2018

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