IAGI Installer Member

GeoDuct HDPE Cable Ducting 50-315 mm

Double-wall corrugated HDPE conduit for buried fibre, telecoms and LV/MV power cables. Sizes 50-315 mm OD, with 6 m lengths and coils by diameter. Black standard; red for telecoms on request. Supply, delivery, installation and QA/QC support across South Africa and Africa.

View Spec Sheet

Technical Specification of GeoDuct HDPE Cable Ducting 50-315 mm

GeoDuct is an unslotted double-wall HDPE conduit for underground fibre-optic, telecommunications and low- to medium-voltage power cable protection. Its ribbed outer wall provides structural support with low weight. Straight lengths have a smooth bore; coils use a lightly corrugated bore for winding.

Specify outside diameters of 50, 75, 110, 160, 200, 250 or 315 mm. Typical inside diameters are 40, 63, 95, 137, 173, 217 and 273 mm respectively. Standard straight lengths are 6 m in 75-315 mm; standard coils are 50 m in 50-160 mm. The 50 mm size is coil-only. Longer coils up to 1,250 m require diameter and production confirmation.

Black is standard; red is available for telecoms on request. State colour, size and format when ordering. Couplings and seals are available across the range; 200-315 mm sizes use integrated spigot-and-socket joints. Confirm plugs, spacers, chamber entries and bends by diameter.

SANS 61386-24 Class N identifies normal-duty impact performance. Compression resistance is ≥450 N for straight lengths and ≥250 N for coils at 5% internal-diameter deformation. These values are not an SN rating or a traffic-load approval. Installation depth and bedding must follow the engineered project specification.

Geosynthetics Africa supports cable infrastructure projects in South Africa and across Southern, East, West and Central Africa with supply, delivery, installation and QA/QC scopes agreed for each site. Use GeoPipe for slotted drainage and GeoPipe HD for larger SN8-base-pipe drainage collectors.

Typical Values for PIPES DRAINAGE DUCTING

Colour
Black standard; red telecoms on request
Compression
≥450 N straight; ≥250 N coils
Outside diameter
50-315 mm
Supply format
6 m lengths; 50 m coils by diameter
Bore
Smooth straight; lightly corrugated coils
Standard
SANS 61386-24; Class N impact
Material
Double-wall corrugated HDPE

Properties & Dimensions

PropertyGEODUCT COILSGEODUCT STRAIGHT LENGTHSGEODUCT LARGE DIAMETER
Wall constructionDouble-wall corrugatedDouble-wall corrugatedDouble-wall corrugated
MaterialHDPEHDPEHDPE
Supply format50 m coils; longer on request6 m lengths6 m lengths
Outside diameter (mm)50 | 75 | 110 | 16075 | 110 | 160200 | 250 | 315
Typical inside diameter (mm)40 | 63 | 95 | 13763 | 95 | 137173 | 217 | 273
Standard colourBlackBlackBlack
Telecom colour optionRed on requestRed on requestRed on request
Compression at 5% ID deformation≥250 N≥450 N≥450 N
Impact classN (normal duty)N (normal duty)N (normal duty)
Inner wallLightly corrugatedSmoothSmooth
Joint arrangementCoupling; seal as specifiedCoupling; seal as specifiedIntegrated spigot/socket
Minimum bending radius15 × ODUse suitable bendsUse suitable bends
Product standardSANS 61386-24SANS 61386-24SANS 61386-24
ApplicationBuried cable protectionBuried cable protectionBuried cable protection

Popular Catalogue Items

GeoDuct™ - HDPE Corrugated Double Wall Cable Ducting

GeoDuct™ - HDPE Corrugated Double Wall Cable Ducting

50-315 mm OD

Related Product Groups

Three Questions To Ask Before You Order

1.What sizes of GeoDuct cable ducting are available?
The outside-diameter range is 50, 75, 110, 160, 200, 250 and 315 mm. Select the bore needed for cable diameter, fill ratio and pulling design; nominal OD is not the usable internal diameter.
2.Is GeoDuct available in black and red?
Black is standard. Red is available for telecoms on request. Confirm the utility owner’s colour requirements and specify colour, size and quantity when requesting a quotation.
3.What lengths and coils can I order?
6 m straight lengths are available in 75-315 mm and standard 50 m coils in 50-160 mm. The 50 mm size is coil-only. Longer coils up to 1,250 m require size and production confirmation.
4.Can GeoDuct protect solar farm cables?
GeoDuct can be specified for buried cable routes in solar PV or wind projects where the project design accepts its performance. UV stabilisation supports storage and handling; it does not establish approval for permanent exposed use.
5.Is GeoDuct a drainage pipe?
GeoDuct is solid, unslotted cable conduit. GeoPipe is slotted for subsoil water collection; GeoPipe HD extends collector drainage to 315 mm. Choose a product for the required function.
6.What is the difference between compression resistance and SN stiffness?
GeoDuct uses SANS 61386-24 compression values of ≥450 N for straight lengths and ≥250 N for coils at 5% ID deformation, with Class N impact. An SN class is a separate ring-stiffness measure; do not substitute one for the other.
7.What accessories and delivery support are available?
Couplings and seals cover the size range; plugs, spacers, bends and chamber entries are diameter-dependent. Geosynthetics Africa coordinates supply and delivery across South Africa and Africa, with installation and QA/QC scope agreed per project.

Specification For The Design, Installation Of GeoDuct HDPE Cable Ducting 50-315 mm

Set trench depth, width and cover from the approved design, allowing for cable thermal requirements and imposed loads. Prepare level, stone-free bedding with adequate support; do not infer permitted traffic load from the compression test value.

Uncoil progressively without twisting or kinking. Maintain at least 15 × OD bending radius for coils. Use diameter-matched spacers for duct banks and suitable bends where a tighter change of direction is required.

Clean ends and inspect couplings, sockets and seals. Fully engage each joint; fit the specified sealing ring where water or silt exclusion is required. Confirm joint suitability for the project rather than assuming every push-fit joint is watertight.

Keep open ends plugged during construction and provide a draw rope with adequate tails. Clear the bore before cable installation and record route and chamber locations.

Place suitable backfill evenly around ducts and compact in controlled layers. Cover before compaction equipment or construction traffic is permitted must be approved for the installation. Do not use nominally higher pipe stiffness to compensate for inadequate cover without design approval.

Use pulling equipment and lubricant compatible with the cable and duct. Respect the cable supplier’s bend and pulling-tension limits. Inspect bore continuity and retain a draw rope where specified.

Store coils flat and lengths on level supports away from sharp objects and unstable trench edges. UV stabilisation supports handling and storage; avoid prolonged sunlight exposure. Record delivery condition, product identification, bedding, jointing, cover and as-built route for QA/QC.

Featured Projects Across Africa

Request a Quote for This Product Family

Upload your BOQ, drawings, or specifications and our technical team will provide a detailed proposal.

Drag & drop your BOQ or drawings or click to upload
PDF, DWG, DOC, XLS, images (Max 20MB each, up to 8 files)

Have a project? Start with us.

Get expert engineering support, reliable material supply, and best-in-class installation.

Talk To Us Today