Protected Structure
Identify the pipeline, tank bottom, station piping, buried steel or other asset; define its geometry, coating condition, isolation and protection zones.
MMO Linear Anode Manufacturer · Flexible ICCP Assemblies
MMO Linear Anodes for Distributed Cathodic Protection
HELE manufactures flexible MMO linear anode assemblies for long-run ICCP systems. Each order is configured around the required output per meter, active length, conductor and feed arrangement, installation environment, connection protection and design-life basis.
Final output, active length, life calculation and installation layout must be confirmed against the project CP design and approved order documents.
82–1312 mA/mStandard output directions
328 / 656Frequently requested mA/m ratings
25 yearsStandard design basis at rated conditions
Up to 500 mReference coil length; custom available
Start with the CP design
Define the Electrical Duty and Installation Boundary First
A linear anode should not be selected from outer diameter or coil length alone. The CP design must connect the protected structure, current demand, environment, active length, conductor arrangement, voltage-drop limit, installation method and target life. When these inputs are incomplete, the quotation should identify them as open items rather than hide them inside a standard model description.
Environment
Provide measured soil, sand or backfill resistivity, moisture and temperature information, chemical exposure, installation depth and expected seasonal variation.
Electrical Duty
State total CP current, target output per meter, active length, rectifier limits, feed points, cable route and the permitted voltage drop.
Installation & Life
Define layout, spacing, bending and pulling conditions, joints, terminations, access, commissioning evidence and the required service-life calculation basis.
Engineering boundary: HELE supplies the linear-anode assembly and agreed manufacturing evidence. Final CP system design, protection criteria, rectifier selection, field layout and commissioning acceptance remain subject to the project designer and applicable owner or project requirements.
Complete assembly
What Is an MMO Linear Anode Assembly?
An MMO linear anode is a flexible packaged impressed-current anode that distributes current along an extended installation length. The MMO-coated titanium wire is the active electrode, but it is only one part of the product. A complete assembly also needs a longitudinal conductor, controlled electrical connections, conductive coke breeze, a porous containment layer, mechanical protection and order-defined ends or lead cables.
This distinction matters when quotations are compared. A bare MMO wire, a wire-and-cable subassembly and a finished coke-sock linear anode do not have the same supply boundary, electrical behavior, installation protection or field responsibilities.
MMO/Ti Active Wire
Grade 1 titanium wire with IrO₂/Ta₂O₅ MMO coating provides the active anodic surface.
Continuous Copper Conductor
Carries current along the installation and helps control longitudinal resistance and voltage drop.
Conductive Coke Breeze
Creates a conductive environment around the active element and supports distributed discharge.
Fabric & Outer Braiding
Retains the coke breeze and protects the flexible assembly during transport and installation.
Connections, Splices & End Seals
Connection spacing, sealing materials, lead-cable transitions and end treatment are controlled against the approved assembly design.
Current output options
Standard and Custom Linear Anode Output Ratings
Output per meter is a design input, not a stand-alone performance promise. Select it together with total CP demand, active length, coating and life basis, conductor size, feed arrangement, voltage drop, coke/backfill condition, soil resistivity and rectifier capability.
| Output Direction | Imperial Equivalent | HELE Supply Status | What Must Be Confirmed |
|---|---|---|---|
| 82 mA/m | 25 mA/ft | Standard direction | Required active length, total current, conductor and 25-year rated basis. |
| 328 mA/m | 100 mA/ft | Standard direction | Feed arrangement, voltage drop, rectifier range, environment and design life. |
| 656 mA/m | 200 mA/ft | Project-specific / available on request | Coating basis, conductor and joint configuration, heat/electrical limits and required evidence. |
| 984 mA/m | 300 mA/ft | Standard direction | Current distribution, feed-point strategy, installation conditions and life calculation. |
| 1312 mA/m | 400 mA/ft | Standard direction | Total-current and voltage-drop review, rectifier, cable, connections and rated duty. |
| Other output | Order-defined | Custom review | Full CP design input, feasibility review and approved technical schedule. |
328 mA/m linear anode
At 328 mA/m, 100 m of active length represents 32.8 A of nominal distributed output before project derating or design margins. Confirm whether the quoted length is active anode length or total delivered length, and confirm how current enters the longitudinal conductor.
656 mA/m linear anode
At 656 mA/m, 100 m of active length represents 65.6 A on the stated arithmetic basis. Because this is a project-specific direction, the quotation should define the coating/life basis, conductor and connection arrangement, feed points, test scope and operating limits.
Do not mix rating boundaries: maximum output, rated continuous output, design output and project operating output are not automatically the same. The approved datasheet and CP calculation should use one definition consistently.
Technical specification
MMO Linear Anode Technical Data
The values below describe HELE's current reference supply directions. The quotation and approved technical schedule control the delivered configuration.
| Electrical / Active System | Reference Supply Basis |
|---|---|
| MMO coating | IrO₂ / Ta₂O₅ |
| Titanium substrate | Grade 1 |
| Standard output | 82, 328, 984 and 1312 mA/m |
| Custom output | Including 656 mA/m and other reviewed duties |
| Standard design basis | 25 years at confirmed rated conditions |
| Internal conductor | Copper, ≥10 mm² or project-defined |
| Typical connection spacing | 3 m ±5%, subject to approved design |
| Contact resistance | ≤0.009 Ω on the stated inspection basis |
| Mechanical / Packaging | Reference Supply Basis |
|---|---|
| Flexible anode OD | 40 ±2 mm |
| Cable insulation | XLPE/PVC or project-specific |
| Alternative cable | PVDF/HMWPE for selected chemical or chloride environments |
| Coke breeze content | ≥98% |
| Coke particle size | 0.1–1.0 mm |
| Coke volume resistivity | ≤0.05 Ω·m |
| Typical product weight | 1.25–1.35 kg/m |
| Reference coil length | Up to 500 m; custom length available |
Order-defined items: minimum bend radius, pulling-force limit, permitted field cuts, reel dimensions, shipping weight, conductor/feed arrangement, lead-cable length, joint count, end sealing, identification and inspection sampling must be confirmed for the selected configuration. They are not inferred from the 40 mm outer diameter.
Custom engineering
Configure the Assembly Around the Approved CP Layout
A useful custom quotation does more than change the coil length. It closes the electrical and mechanical interfaces that determine whether the assembly can be installed, energized, tested and traced as intended.
Output & Active Length
Rated mA/m, active length, total length, total current, life basis and any inactive lead sections.
Conductor & Feed Points
Conductor section, cable construction, current-entry arrangement, joint interval and voltage-drop basis.
Connection Protection
Anode-to-conductor joints, splices, end seals, lead transition, water/chemical exposure and mechanical protection.
Installation Handling
Reel dimensions, pay-off direction, pulling method, route, bending limits, trench or sand-pad condition and labeling.
Inspection & Documents
Coating/production record, continuity and resistance checks, dimensions, length record, labels and packing list.
Delivery Configuration
Coil/reel length, lead cable, junction accessories, quantity, preservation, shipping support and release documents.
Applications & installation
Where Distributed Linear Anodes Fit
Linear anodes are most useful when the CP design needs distributed current along an extended or geometrically complex area. Application names alone do not determine suitability; each layout still requires current-demand, resistivity, interference, monitoring and installation review.
Buried Pipelines
Parallel or distributed installation can reduce dependence on one remote discharge point where the route and CP study support this approach.
Tank Bottoms
Concentric, parallel or other engineered layouts can distribute current beneath aboveground storage tank bottoms.
Dense Piping Networks
Stations, chemical plants and power facilities may use distributed layouts where multiple buried structures and shielding complicate current delivery.
Buried Assets & Selected Concrete
Configuration must reflect embedment, cover, resistivity, connection protection and accessibility; concrete work requires a separate installation review.
Electrical review
Voltage Drop, Feed Points and Current Distribution
The rated mA/m value establishes a distributed-output basis. It does not prove that the same current reaches every part of a long installation. Conductor resistance, current-entry location, connection interval, active length and total current determine the longitudinal voltage profile.
Calculate total nominal current
Multiply the selected output per meter by active length, then apply the project calculation method, margins and operating assumptions.
Review the feed arrangement
A one-end, two-end, center or multiple-feed arrangement may produce different current and voltage behavior. Define it on the approved electrical drawing.
Coordinate rectifier and cable limits
Check rectifier voltage/current range, header cable, junction boxes, field cable and acceptable voltage drop as one electrical path.
Installation controls
Lay, Connect and Commission Without Damaging the Assembly
Installation controls should be agreed before manufacture because the site route affects reel size, lead configuration, joint protection, handling and inspection access.
Trench Laying
Control depth, spacing, support, backfill, sharp objects, crossing points and separation from the protected structure.
Tank-Bottom Layout
Coordinate the sand pad, liner, ring or parallel geometry, feed locations, reference electrodes and future test access.
Pulling & Pay-Off
Use the approved reel direction, route and handling limits. Do not infer pulling force or bend radius from outside diameter.
Commissioning
Check polarity, continuity, isolation, rectifier output, structure-to-electrolyte potentials and current distribution against the CP procedure.
Inside HELE
Inside Our Manufacturing & Quality System
The release package should match the ordered assembly, not a generic anode certificate. HELE reviews the MMO/Ti element, longitudinal conductor, defined connections, containment materials, finished length and packing against the confirmed specification.
1. Material & Build Identity
Confirm titanium wire, coating direction, conductor, cable, coke and fabric/outer protection.
2. Assembly Control
Control connection interval, splices, end treatment, active/total length and assembly identification.
3. Electrical Verification
Continuity, connection resistance and other order-defined electrical checks are recorded to the agreed method.
4. Final Inspection
Review outside diameter, length, reel/coil condition, labels, mechanical protection and packing.
Available records may include the technical datasheet, coating or production record, inspection record, connection record, electrical test results, finished-length record, labels and packing list—only as agreed for the order.
Anode form comparison
Linear Anode vs MMO Wire, Ribbon and Mesh Ribbon
These products can all support distributed-current applications, but they are not interchangeable. Start with the required installation geometry and supply boundary.
| Product | What It Is | Typical Selection Direction | Next Step |
|---|---|---|---|
| MMO Linear Anode | Packaged flexible assembly with active MMO/Ti element, conductor, coke and protective layers. | Long-run distributed ICCP where a complete installable assembly is required. | Confirm output, active length, electrical layout and installation. |
| MMO Wire Anode | Flexible MMO-coated titanium active electrode. | Embedded or custom assemblies where the project defines the surrounding system. | View MMO Wire Anode → |
| MMO Ribbon Anode | Flat MMO-coated titanium ribbon. | Tank bottoms, concrete or other field-fabricated distributed layouts. | View MMO Ribbon Anode → |
| MMO Mesh Ribbon | Open expanded geometry with greater contact area. | Selected reinforced-concrete or large-area embedded layouts. | View MMO Mesh Ribbon → |
Before Requesting a Quote
Define the Linear-Anode Assembly and Electrical Boundary Before Quotation
An MMO linear anode is an engineered distributed assembly, not simply coated wire sold by length. Quotation review should connect the required output to the active element, conductor, feed arrangement, voltage drop, connections and installation environment.
What HELE reviews before manufacture
- State required output per unit length and the conditions used to calculate it.
- Separate active length, inactive lead length and total supplied length.
- Define conductor size, feed points, allowable voltage drop and cable interface.
- Confirm coke breeze, fabric sleeve, backfill or other assembly components in the supply scope.
- Agree splice, end-seal, reel, handling and installation-document requirements.
What the product specification cannot replace
- A bare MMO wire and a complete packaged linear anode are different supply scopes.
- Nominal 328 or 656 ft lengths do not define output, voltage drop or suitability without the full electrical basis.
- Route design, groundbed layout and field installation remain project inputs unless included in the order.
Related anode options
Compare the adjacent product families only after the reaction, environment and supply boundary are clear.
Frequently asked questions
MMO Linear Anode FAQs
What is an MMO linear anode?+
It is a flexible packaged ICCP anode that combines an MMO/Ti active element, longitudinal conductor, conductive coke breeze and protective fabric structure to distribute current along an extended length.
Is it the same as MMO wire?+
No. MMO wire is the active electrode. A complete linear-anode assembly also includes the conductor, connections, conductive filling, containment, mechanical protection and ends or lead cables.
How should 328 and 656 mA/m be compared?+
Compare total current at the required active length, then review coating/life basis, conductor, feed points, voltage drop, rectifier, environment, cable and inspection scope. A higher mA/m value is not automatically the better design.
Does the 25-year basis apply to every project?+
No. It applies to the confirmed standard configuration and rated design assumptions. The quotation must identify the output, coating and life basis, environment, duty and calculation boundary for the project.
Can a 500 m coil be cut at site?+
Only when the approved design and supplier instructions allow it. Cutting changes active length, total output, end sealing, feed arrangement, traceability and responsibility for field termination.
What data are needed for a quotation?+
Provide the asset, CP current demand, proposed output per meter, active and total length, resistivity/backfill, layout, conductor and cable, feed arrangement, life target, quantity, drawings and required documents.
Engineering RFQ
Request a Custom MMO Linear Anode Review
Send the information already available. Unknown values can remain open for review, but the output rating, active length, conductor and installation boundary should be resolved before the order is released.
- ✓ Protected structure and CP current demand
- ✓ 82 / 328 / 656 / 984 / 1312 mA/m or custom direction
- ✓ Active length, total length and quantity
- ✓ Soil, sand or backfill resistivity and installation layout
- ✓ Conductor, cable, feed points, joints and terminations
- ✓ Design-life target, inspection and document requirements