Geosynthetics June/July 2022 - 30

Aboveground storage tank liners for energy applications
AST tanks are unique because they
are constructed only with wall sections
as the primary method of containment
designed into the structure. AST tanks in
the O&G drilling segment of the industry
are merely steel wall segments bolted
together to create a ring. This ring is typically
12 to 14 feet (3.7 to 4.3 m) tall and
between 60 and 260 feet (18.3 and 79.2
m) in diameter (Figure 1 on page 28-29).
They require no floor, and they rely solely
on the subgrade as their base. With the
lack of a steel or concrete floor and only
bolted sections and seams in the sidewalls,
a compliant geomembrane lining
system is the only way to hold the desired
liquid (water or flowback chemicals) that
results from drilling.
FIGURE 2 Wooden oil tank near Odessa, Texas. Photograph courtesy of the author
934 " (24'-9 " DIA) X 128 " (10'-8 " H) TANK- RPP
DESIGN PROPERTY OF:
®
TARP & LINER
www.inlandtarp.com
Bucket liners versus
tapered liners
A traditional tank liner has two primary
components consisting of a wall/skirt and
a floor connected with a radial weld. This
weld joins the sidewalls to the precut floor
diameter or circle creating a single liner
and is sometimes referred to as a bucket
liner. Bucket liners work well in permanent
applications when the tank's walls and the
floor are fixed and support the liner in all
directions. Typical installation requires
hanging the wall sections or skirts, installing
a floor piece built to the diameter of the
tank, and welding the two sections together
via the radial weld around the perimeter of
the floor, thereby attaching the two pieces
to create a solid liner (Figure 3).
Based on the more permanent nature
FIGURE 3 Typical shop layout for a bucket liner
of the tank in this configuration, settling
or movement of the tank and, subsequently,
the liner is not as concerning. The
most significant risk associated with this
AST configuration is the radial weld. No
voids between the liner and walls or floor
of the tank are allowable. A load point or
bridging at the edge of the tank can create
a significant potential failure issue.
30
Geosynthetics | June July 2022
http://www.inlandtarp.com

Geosynthetics June/July 2022

Table of Contents for the Digital Edition of Geosynthetics June/July 2022

Geosynthetics June/July 2022 - Cover1
Geosynthetics June/July 2022 - Cover2
Geosynthetics June/July 2022 - 1
Geosynthetics June/July 2022 - 2
Geosynthetics June/July 2022 - 3
Geosynthetics June/July 2022 - 4
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Geosynthetics June/July 2022 - Cover3
Geosynthetics June/July 2022 - Cover4
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