HDPE PLB Duct Pipes
HDPE PLB duct pipe (Permanently Lubricated Bore) for underground optical fibre cable. Dual-layer co-extruded construction with a silicone-lubricated inner bore — coefficient of friction ≤ 0.06 — that lets fibre be blown over 1,000+ metres. Manufactured in Nagpur from virgin polyethylene conforming to IS 7328:2020, in standard PLB sizes from 25/20mm to 63/51mm.
HDPE PLB Duct Pipes — Product Range & Catalog
Sizes AvailablePLB Duct Pipe (Silicore)
Dual-layer co-extruded HDPE duct with permanently lubricated bore, supplied in 200m / 500m / 1000m coils.
HDPE PLB Duct Pipes — Features & Benefits
Permanently Lubricated Bore
Silicone lubricant co-extruded into the inner wall — bonded, not coated, so it never wears off
Coefficient of Friction ≤ 0.06
Versus 0.15–0.25 for plain HDPE conduit — the difference between blowing and pulling cable
Blow Fibre 1,000m+
Continuous runs at up to 100 m/min without intermediate access pits
Dual-Layer Construction
Virgin HDPE outer sheath for crush and impact strength, silicore inner layer for low friction
UV Stabilised Outer Sheath
2.5 ± 0.5% carbon black in black compound for outdoor storage and exposed sections
Air & Water Tight Joints
Push-fit couplers hold blowing air pressure and keep groundwater out
HDPE PLB Duct Pipes — Applications & Uses
BharatNet & Rural Fibre
5G Backhaul & Tower Fiberisation
Railway Signalling (RDSO)
Highway OFC (NHAI / MoRTH)
Smart City Utility Corridors
FTTH & Broadband Rollout
Dimensions & Specifications Chart
Outer diameter, wall thickness, SDR ratios, and weight metrics per Indian Standards.
| Size (OD/ID) | Wall Thickness | Inner Diameter | Crush Resistance | Approx Weight |
|---|---|---|---|---|
| 25/20mm | 2.5 ± 0.2mm | 20mm | 250 kgf | ≈0.17 kg/m |
| 32/26mm | 3.0 ± 0.2mm | 26mm | 250 kgf | ≈0.26 kg/m |
| 40/33mm | 3.5 ± 0.2mm | 33mm | 450 kgf | ≈0.38 kg/m |
| 50/42mm | 4.0 ± 0.2mm | 42mm | 550 kgf | ≈0.55 kg/m |
| 63/51mm | 6.0 ± 0.5mm | 51mm | 800 kgf | ≈1.02 kg/m |
Duct Class & Friction Rating
PLB duct is not a pressure pipe — it is classified by bore lubrication and coefficient of friction.
Co-extruded permanently lubricated bore for blowing optical fibre cable
Why Choose TARKO HDPE PLB Duct Pipes?
PLB stands for Permanently Lubricated Bore. TARKO manufactures HDPE PLB duct pipe at our Nagpur facility as a dual-layer co-extruded pipe: a virgin HDPE outer sheath that takes the crush and impact loads of burial, and an inner silicore layer with silicone lubricant locked into the polymer matrix during extrusion.