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AnodeFlex
3000
Linear Anode System
By Covalence
Long-line flexible anode for
impressed-current cathodic
protection and of on-grade and buried storage tanks.
Description
AnodeFlex 3000 is a
long-life, flexible, wire anode, which can be placed remote to
the target structure. Greater current output can be achieved on
applications where close proximity anode groundbeds do not work.
Key to the product's performance
is the central, copper-core mixed metal oxide anode. The anode
is powered by a # 8 AWG copper cable insulated with an inner
layer of halar and outer layer of high molecular weight
polyethylene. The unique construction of the anode and copper
cable allows high current output with protection against low pH
and chlorine attack.
AnodeFlex 3000 can be placed
remote to the steel surface to be protected, thereby maintaining
the steel-to-soil "instant-off" potential in the required window
of -850 mV (-950 mV if SRB's present) and -1200 mV.
The central MMO wire and cable
are surrounded by factory prepackaged, high-conductivity coke
breeze, held in place by a porous, woven acid-resistant jacket.
This arrangement avoids handling loose coke breeze and
simplifies field installation. The improved current distribution
increases anode efficiency and maintains a low resistance
groundbed. On poorly coated pipelines where optimal polarization
can no longer be achieved, AnodeFlex 3000 can often be installed
as an alternative to expensive recoating. Both on single and
multi-parallel pipelines, safe levels of polarization will be
restored at every point. The system avoids difficult and costly
field recoating and greatly reduces environmental disturbance.
Anode Flex 3000-01 is delivered
on long length spools. Because no additional coke breeze is
required, the installation is as simple as laying a low -voltage
power cable. Proven heat-shrinkable splice kits, with tee
splices and end sealing caps, are available to complete any
installation design.
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| AnodeFlex 3000
Construction
Five basic elements:
- Central Copper Bus Cable:
#8 AWG Halar Insulated, serving as a low resistance busbar
to deliver the required current over considerable distance
without incurring substantial longitudinal voltage drop.
Halar insulation seals the conductor from chemical attack.
- Copper-Cored, Mixed Metal
Oxide Anode (MMO): Provides low attenuation for reduced
splicing, in combination with prepackaged coke breeze,
offers a low resistance groundbed designed for a minimum
life of 40 years.
- Coke Breeze:
Pre-packaged, high performance calcined petroleum coke
breeze, serving as the active matrix in which the
electrochemical reactions take place. Designed for min. 20
years service life at max. Current output of 656 mA/m (200
mA/ft).
- Fabric Jacket:
Integrated woven, acid resistant and porous jacket holding
the coke breeze in place around the anode.
- Protective Braid:
Tough, porous, non-conductive protective braid enhancing the
abrasion and damage resistance of the jacket.
Maximum Temperature: 50ºC
- 122ºF
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Product Features /
Benefits
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Anode can be
remote to the pipeline
Distributes current uniformly over total length.
No over- or under-protected areas.
Prevents accelerated coating disbondment.
More effective and economical than a series of discrete anodes.
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Pipeline
Rehabilitation without Excavation
A fraction of the cost of recoating.
Environmentally friendly.
No loss of revenue or supply interruptions.
No safety problems associated with working on live lines.
Far quicker, up to 1.25 miles (2 km) laying speed per day.
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Long
continuous circuit lengths
67% fewer joints compared to conventional anode systems.
Lower maintenance cost.
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Flexible
under tank bottom design
Directional drill with no PVC, no backfill.
Tight bend radius.
Driving voltage is lower than conventional MMO.
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Pre-packaged
coke breeze
Simplifies field installation.
Installation with standard cable laying equipment.
Fast, easy & cost effective.
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AnodeFlex 3000
Typical Properties
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Copper Conductor |
| Dimensions |
8 AWG per ASTM B-263 |
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Coke
Breeze |
Fixed carbon
Resistivity |
99.7% per ASTM D-172
0.4 ohm-cm per G.L.C.-C-12A at 23ºC, 10 bar |
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Fabric
Jacket |
Weight
Bursting strength
Abrasion resistance
Fluid resistance
Chlorine resistance
UV resistance |
200 g/m2
min, 229 g/m2 typical
575 N per ISO 3303
219 cycles to failure per ASTM D-4157
Pass, 6-month immersion test
Pass, 6-month immersion test
55% tear strength loss per ASTM G-53,
8 hrs @ 60ºC (140ºF), 4 hrs condensation @ 50ºC (122ºF)
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AnodeFlex 3000
Ordering Information
AnodeFlex type products are
available on a spool.
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Number |
Description |
AFLX 3000-02
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Copper-core
MMO with copper conductor surrounded by pre-packaged
high-conductivity coke breeze.
Standard length 494 m ± 6 m (1620 ft ± 120 ft) |
AFLX-3000-CAP
AFLX-3000-TEE
AFLX-3000-SPLICE |
End seal kit
Tee splice kit
In-line splice kit |
Go to
AnodeFlex Linear Anode System Overview &
AnodeFlex Products.
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