| Pipe Specifications |
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| TriShield® PIPE |
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| RIB
SECTION |
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| COMPOSITE
WALL SECTION |
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| TriShield® steel ribbed polyethylene
pipe is a state of the art composite pipe product. It
combines smooth wall hydraulics and the structural strength
of steel with the corrosion and abrasion resistance of
high performance engineered polyethylenes. |
| At the core of TriShield composite
is a strong galvanized steel sheet with 2 ounces of zinc
coating per square foot. Dow Trenchcoat® protective
film, 10 mil thick, is bonded to the exterior side for
protection from potential soil-side corrosion. |
| TriShield pipe’s interior liner
consists of a unique tie layer film and polyolefin plastomer
liner, both developed by The Dow Chemical Company specifically
for this application. This lining system has been thoroughly
tested and found to be highly resistant to scour and
abrasion. It also exhibits excellent adhesion and durability
in handling and field service. |
| TriShield pipe and pipe-arch are available
in 30" through 108" diameters. Although 6" incremental
sizing is standard, 1" incremental sizes are available
for specific projects. Available steel wall thickness
are .064", .079", and .109". TriShield
is manufactured in accordance with national specification
ASTM A 978-97. |
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| Liner
Integrity |
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| The TriShield ribs are filled with extruded
liner material and slightly deltoided to provide a mechanical
interlock between the liner and the pipe wall. In addition,
the liner is chemically bonded to the pipe wall through
an intermediate adhesive tie layer. This dual attachment
system provides added assurance of composite integrity. |
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| Abrasion
Resistance |
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| Using a Bed Load Abrasion Test Machine
(ASTM A 926), samples of TriShield pipe were compared
to samples of a typical HPDE smooth wall pipe product.
The test results indicated that the TriShield polyethylene
liner outperformed HPDE (on the basis of weight loss)
by more than three and a half times. |
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| Economic
Benefits |
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| TriShield pipe is a premium pipe product
that provides notable strength, installation, and durability
benefits. Its light weight, long lengths, thinner walls,
and variable sizing result in significant savings in
material, transportation, handling, and installation
costs. Furthermore, TriShield pipe can be arched for
shallow cover or low clearance situations. Get the full
story in our free brochure. |
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| Hydraulics
(Manning's n=0.0105) |
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| TriShield pipe is not only tough and durable,
but demonstrates exceptional hydraulic efficiency as
well. It is suitable for use on storm drain, irrigation,
small hydro, and most other gravity water conveyance
projects where hydraulic efficiency and durability are
design considerations. |
| TriShield pipe can be made to the nearest
diameter inch of size required, within the available
size range. With a design Manning’s "n" of
0.0105 and variable sizing, TriShield pipe often allows
designers to downsize a pipe system from a standard incremental
pipe size to the actual size needed. This is particularly
important when clearance and flow capacities are critical. |
| Contact Pacific Corrugated Pipe Company
for supplemental brochure and complete test information. |
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