Underground Infrastructure - August 2023 - 33

EDITION 85 | AUG 2023 | NASSCO.ORG
To prevent the high consequence of leakage of
Figure 2 Observed force main failure modes.
sewage into the environment, force main should
be regularly inspected and renovated, when the
condition state falls below an acceptable level.
NASSCO's Pressure Pipe Committee has
developed and published a general guidelines
matrix for force main pressure pipe inspection.
These guidelines are available at NASSCO.org/
Resources.
These general guidelines provide information with
respect to different rehabilitation methods'
structural classification, typical diameter ranges,
lined Hazen Williams coefficients, connections,
and end seals. It also provides additional
comments for each rehabilitation method.
NASSCO's Pressure Pipe Committee is currently
working on a white paper that will provide
additional information on force main rehabilitation
design and construction. This white paper is
expected to be published in early 2024.
The Committee also conducted a highly attended
webinar titled Trenchless Rehabilitation for Force
Mains. The recorded webinar may be viewed at
NASSCO.org/resources/webinars.
To learn more about force main
assessment, maintenance, and
rehabilitation, please visit
NASSCO.org.
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Underground Infrastructure - August 2023

Table of Contents for the Digital Edition of Underground Infrastructure - August 2023

Underground Infrastructure - August 2023 - 1
Underground Infrastructure - August 2023 - 2
Underground Infrastructure - August 2023 - 3
Underground Infrastructure - August 2023 - 4
Underground Infrastructure - August 2023 - 5
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Underground Infrastructure - August 2023 - 7
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