4
Several types of UPP
®
underground fuel pipe are available for different applications and to meet various
engineering and legal requirements:
• Primary pipe can be used as a fuel-proof liner for product, suction, pressure, vapor vent, and fill lines.
• Secondary containment pipe can be used with EN primary pipe for pressure systems or environmentally
sensitive sites.
• Integral secondary containment pipe (UL971 spec) can be used for pressure systems or environmentally
sensitive sites.
• Electrical conduit pipe can be used for underground electrical wiring protection.
• Duct can provide a watertight, underground channel for pipes or electrical cables.
UPP
®
piping systems are designed in various diameters, starting at 32 mm (1"), to transfer fuels in filling station
forecourts, marinas, and airports. UPP
®
systems are also used for government and military installations as well
as many industrial sites such as mines and rail depots.
There is no requirement for a concrete trench because fusion welded HDPE pipe is structurally resistant to
weight of backfill material and dynamic traffic loads. 40 years of experience has shown no failures in underground
fuel pipe systems and no loss into the ground.
UNDERGROUND FUEL PIPE CONSTRUCTION
The black outer structural layer of the pipe is High Density Polyethylene (HDPE), grade PE100 that allows the use
of electrofusion couplers and fittings to construct a variety of pipeline configurations. HDPE PE100 has well-
proven resistance to: stress cracking, puncture, scratch, impact, microbial and rodent attack.
The intermediate tie-layer causes a permanent bond to occur between the polyethylene and the liner material.
The liner of UPP
®
primary pipe is a specially formulated “fuel proof” barrier layer manufactured from EVOH
(EN / UL). This liner has exceptional resistance to absorption and permeation of both hydrocarbon and alcohol fuel
blends.
The smooth bore and low friction loss of UPP
®
pipe permits higher fuel and vapor flows than steel pipe, reducing
the pumping energy costs.
UPP
®
primary fuel pipe is pressure rated to 10 bar (EN) or (90 psi) to UL971. Rupture pressure is typically
exceeding 40 bar (580 psi) providing a large margin of safety.
Carrier - PE - Black
Tie Layer
Liner - EVOH -clear (EN / UL)
PRESSURE RATINGS
Pressure Rating (UL 971)
Pipe Type
Pressure ve:
Pressure ve:
Pressure Rating -ve:
Pressure Rating -ve:
UPP Primary
6.2 Bar
90 PSI
0.9 Bar
26.6" Hg
UPP Secondary
4 Bar
58 PSI
0.5 Bar
15" Hg
Table 1: UL971 Pipe Maximum Pressure Rating
Pressure Rating (EN14125)
Pipe Type
Pressure ve:
Pressure ve:
Pressure Rating -ve:
Pressure Rating -ve:
UPP Primary
10 Bar
145 PSI
0.9 Bar
26.6" Hg
UPP Secondary
5 Bar
72.5 PSI
0.6 Bar
17.7" Hg
Table 2: EN14125 Pipe Maximum Pressure Rating
Содержание UPP PIPING
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