PexFlex
TECHNICAL INFORMATION
PEX-Flex
is flexible pre-insulated pipe designed for the
efficient transfer of hot or cold medium. Supplied
in single or dual (supply and return bundled
together) format coils, this seamless pipe system
is economical, simple to install and highly effective
even in harsh soil conditions.
PEX-Flex is “self-compensating” with
respect to expansion and contraction …
just uncoil and snake into trench, then backfill.
The pipe installs quickly and easily without
solvent welding, special tools or heavy equipment
resulting in a lower installed cost when compared
to other insulating methods. No drainage tile,
gravel fill or deep/wide trench required. PEX-Flex
can be shallow buried even in high water table
areas. The flexible nature of coiled PEX-Flex
all but eliminates the need for joints, elbows
and fittings making it a true seamless pipe system.
The PEX-Flex carrier pipe is made of plastic
cross linked polyethylene (PEX) with EVAL coating
which keeps oxygen from penetrating the pipe
wall. The PEX is surrounded by a factory applied
layer of closed cell, eco-friendly polyurethane
foam – the best insulation material on
the market. The whole package is encased in a
tough but flexible extruded polyethylene jacket
with UV stabilizer.
The pipe system is bonded … meaning
the carrier pipe(s), insulation and jacket are
mechanically linked to one another and move collectively
during expansion/contraction. This also isolates a moisture problem to damaged area should the jacket be punctured … water cannot migrate through entire pipe system.
All PEX-Flex pipe comes equipped with a “smart”
membrane between the outer casing and the insulation.
This leak proof diffusion barrier prevents (cyclopentane)
gas in the foam from escaping through the jacket
and being replaced by atmospheric air which has
inferior insulating properties – a process
called “aging”. This keeps the operating
performance high throughout the entire service
life of the pipe.
PEX-Flex is manufactured by Logstor
of Denmark, the world’s largest producer
of pre-insulated pipe systems employing over
1300 people in 8 production facilities. Logstor
has over 30 years experience of pre-insulating
flexible PEX tubing. Urecon Ltd. distributes Logstor
products throughout Canada and the US.
Single PEX-Flex Dimensions
Nominal pipe size |
Carrier pipe OD |
Carrier pipe ID |
Carrier pipe wall thickness |
Jacket pipe OD |
Standard/ Maximum coil lengths* |
Minimum bending radius |
Weight |
in | in (mm) |
in (mm) |
in (mm) |
in (mm) |
ft (m) |
ft (m) |
lb/ft (kg/m) |
¾ | 0.98 (25) |
.784 (20) |
0.098 (2.5) |
3.0 (77) |
328/984 (100/300) |
2.6 (0.8) |
.70 (1.0) |
1 | 1.26 (32) |
1.032 (26.2) |
0.114 (2.9) |
3.0 (77) |
328/984 (100/300) |
2.6 (0.8) |
.70 (1.0) |
1¼ | 1.57 (40) |
1.28 (32.6) |
0.145 (3.7) |
3.5 (90) |
328/984 (100/300) |
3.0 (0.9) |
1.9 (1.3) |
1½ | 1.97 (50) |
1.608 (40.8) |
0.181 (4.6) |
4.3 (110) |
328/984 (100/300) |
3.5 (1.1) |
1.3 (1.9) |
2 | 2.48 (63) |
2.024 (51.4) |
0.228 (5.8) |
4.9 (125) |
328/656 (100/200) |
4.0 (1.2) |
1.6 (2.4) |
2½ | 2.95 (75) |
2.406 (61.2) |
0.272 (6.9) |
5.5 (140) |
328 (100) |
4.5 (1.4) |
2.2 (3.3) |
3 | 3.54 (90) |
2.894 (73.6) |
0.323 (8.2) |
6.3 (160) |
328 (100) |
5.2 (1.6) |
2.8 (4.2) |
4 | 4.33 (110) |
3.544 (90) |
0.393 (10.0) |
6.3 (160) |
328 (100) |
5.2 (1.6) |
3.7 (5.5) |
* Pipe can also be supplied to exact length required. Maximum lengths are special order
n.b.: All sizes are metric, not IPS nor CTS sizes; imperial adapters are supplied as required.
Nominal pipe size |
Carrier pipe OD |
Carrier pipe ID |
Carrier pipe wall thickness |
Jacket pipe OD |
Standard/ Maximum coil lengths* |
Minimum bending radius |
Weight |
in | in (mm) |
in (mm) |
in (mm) |
in (mm) |
ft (m) |
ft (m) |
lb/ft (kg/m) |
2 x ¾ | 2 x 0.98 (2 x 25) |
0.784 (20) |
0.098 (2.5) |
4.3 (110) |
328/ 656 (100/200) |
3.5 ( 1.1) |
1.4 (2.1) |
2 x 1 | 2 x 1.26 (2 x 32) |
1.032 (26.2) |
0.114 (2.9) |
4.3 (110) |
567/1,134 (173/246) |
3.5 (1.1) |
1.5 (2.2) |
2 x 1¼ | 2 x 1.57 (2 x 40) |
1.280 (32.6) |
0.145 (3.7) |
4.9 (125) |
328/ 656 (100/200) |
4.0 (1.2) |
1.8 (2.7) |
2 x 1 ½ | 2 x 1.97 (2 x 50) |
1.608 (40.8) |
0.181 (4.6) |
6.3 (160) |
328 (100) |
5.2 (1.6) |
2.8 (4.1) |
* Pipe can also be supplied to exact length required. Maximum lengths are special order.
n.b .: All core pipe sizes are metric; metric compression x imperial NPT threaded adaptors are supplied as required.
Pipe size | Max. temperature | Max. pressure |
in (mm) | Fahrenheit (Celsius) | P.S.I. (bar) |
¾ - 4 (20 - 110) | 203 (95)* | 87 (6) |
* Refer to detailed PEX-Flex product specification for temperature and pressure considerations
outdoor wood furnaces
Only a professionally
manufactured insulated pipe will maximize the
efficiency of an outdoor wood furnace system
by keeping heat losses to a minimum. By effectively
heating the house (not the ground), less fuel
is required, less wood is burned producing less
emissions. Whatever your budget, you simply can’t
afford not to install PEX-Flex! Supplied in coils, this 2-in1 (supply
and return bundled together) pipe is economical,
simple to install and highly effective even in
harsh soil conditions.
PEX-Flex is “self-compensating”
with respect to expansion and contraction …
just uncoil and snake into trench, then backfill.
The pipe installs quickly and easily without
solvent welding, special tools or heavy equipment
resulting in a lower installed cost when compared
to other insulating methods. No drainage tile,
gravel fill or deep/wide trench required. PEX-Flex
can be shallow buried even in high water table
areas. The flexible nature of coiled PEX-Flex
all but eliminates the need for joints, elbows
and fittings making it a true seamless pipe system.
The PEX-Flex carrier pipe is made of plastic
cross linked polyethylene (PEX) with EVAL coating
which keeps oxygen from penetrating the pipe
wall. The PEX is surrounded by a factory applied
layer of closed cell, eco-friendly polyurethane
foam – the best insulation material on
the market. The whole package is encased in a
tough but flexible extruded polyethylene jacket
with UV stabilizer.
The pipe system is bonded … meaning
the carrier pipe(s), insulation and jacket are
mechanically linked to one another and move collectively
during expansion/contraction. This also isolates a moisture problem to damaged area should the jacket be punctured … water cannot migrate through entire pipe system.
All PEX-Flex pipe comes equipped with a “smart”
membrane between the outer casing and the insulation.
This leak proof diffusion barrier prevents (cyclopentane)
gas in the foam from escaping through the jacket
and being replaced by atmospheric air which has
inferior insulating properties – a process
called “aging”. This keeps the operating
performance high throughout the entire service
life of the pipe.
PEX-Flex is manufactured by Logstor
of Denmark, the world’s largest producer
of pre-insulated pipe systems employing over
1300 people in 8 production facilities. Logstor
has over 30 years experience of pre-insulating
flexible PEX tubing. Urecon Ltd. distributes Logstor
products throughout Canada and the US.
The Payback:
Installing PEX-Flex actually pays for itself
over time*, and you're also helping to do your
part to reduce emissions.
The expected yearly savings is approximately 1 1/2
cords of wood based on the following assumptions:
- An average cord of wood yields 24 million BTU's (7 MW/hr).
- The trench from the furnace to the building(s) is approximately 100 ft (30 m) long.
- The payback is based on a comparison to bare or poorly insulated piping systems. These inferior systems may be the result of using materials with insufficient insulating properties, inadequate insulation thickness, or may simply be insulation that absorbed moisture due to water ingress through the jacket or joints.
Temperature drop with dual PEX-Flex
Using 2 x 1 in x 4.3 in OD (2 x 32 mm x 110 mm OD) with following operating parameters:
- Supply temperature: 180 °F (82 °C)
- Soil temperature: 32 °F (0 °C)
Flow | Distance | ||
GPM (US) | 1/sec | 100 ft (30 m) | 150 ft (46 m) |
3 | 0.19 | 178.5°F (81.4°C) | 177.8°F (81.0°C) |
5 | 0.32 | 179.1°F (81.7°C) | 178.7°F (81.5°C) |
10 | 0.63 | 179.5°F (81.9°C) | 179.3°F (81.8°C) |
Dual PEX-Flex Dimensions
Nominal pipe size |
Carrier pipe OD |
Carrier pipe ID |
Carrier pipe wall thickness |
Jacket pipe OD |
Standard/ Maximum coil lengths* |
Minimum bending radius |
Weight |
in | in (mm) |
in (mm) |
in (mm) |
in (mm) |
ft (m) |
ft (m) |
lb/ft (kg/m) |
2 x ¾ | 2 x 0.98 (2 x 25) |
0.784 (20) |
0.098 (2.5) |
4.3 (110) |
328/ 656 (100/200) |
3.5 ( 1.1) |
1.4 (2.1) |
2 x 1 | 2 x 1.26 (2 x 32) |
1.032 (26.2) |
0.114 (2.9) |
4.3 (110) |
567/1,134 (173/246) |
3.5 (1.1) |
1.5 (2.2) |
2 x 1¼ | 2 x 1.57 (2 x 40) |
1.280 (32.6) |
0.145 (3.7) |
4.9 (125) |
328/ 656 (100/200) |
4.0 (1.2) |
1.8 (2.7) |
2 x 1 ½ | 2 x 1.97 (2 x 50) |
1.608 (40.8) |
0.181 (4.6) |
6.3 (160) |
328 (100) |
5.2 (1.6) |
2.8 (4.1) |
* Pipe can also be supplied to exact length required. Maximum lengths are special order.
n.b .: All core pipe sizes are metric; metric compression x imperial NPT threaded adaptors are supplied as required.
Pipe size | Max. temperature | Max. pressure |
in (mm) | Fahrenheit (Celsius) | P.S.I. (bar) |
¾ - 1½ (20 - 50) | 203 (95)* | 87 (6) |
OTHER APPLICATIONS
feet of PEX-Flex have been installed in industrial,
commercial and residential hydronic related pipe
systems around the world. The pipe is used wherever
energy savings are required by keeping overall
heat losses (or gains) to a minimum. Typical
applications include ice/snow melt systems; chilled
water distribution; hot water district energy
projects; chemical feed; industrial process piping
and even solar heating.
Ice/Snow
Melt Systems
Use PEX-Flex to run warm water from the heat source
to the pad without losing heat.
Chilled Water Distribution
Use PEX-Flex to distribute centrally chilled water
for air conditioning … often without
joints or fittings. The highly efficient polyurethane
insulation reduces heat gain from the warm
soil
(or ambient air temperature) greatly increasing
system efficiency.
Hot Water District Energy
Use PEX-Flex to move around hot water in campus
style systems … often without joints
or fittings. Also ideally suited for steam
condensate
return.
Chemical Feed / Industrial Process
Piping
Use PEX-Flex for transfer of chemicals or
general process piping. Typically, joints
and fittings
are eliminated reducing worry of leakage … saving
money when compared to traditional containment
piping.
order pex-flex |
PEX-Flex can by purchased from
distributors throughout Canada and the US. For a local representative please e-mail info@pexflex.net or call our toll free number 1-844-PEX-COIL (1-844-739-2645) |
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