HDPE (High-Density Polyethylene) post tension ducts are a vital component of post-tensioning systems used to strengthen concrete structures. These ducts provide long-term secondary corrosion protection, especially in aggressive environments such as wastewater treatment plants, acid tanks, silos, and structures exposed to de-icing salts.

Ply Seam Design
HDPE ducts feature a reinforced seam design that delivers exceptional durability and leak resistance. This seam ensures tight sealing during grouting and maintains the duct’s structural stability under concrete pressure, vibration, and thermal movement. It is engineered to provide reliable performance in demanding post-tensioning environments, preventing leakage and ensuring long-term integrity.

The smooth internal profile of HDPE ducts allows efficient tendon placement and grout flow. Designed to withstand concrete pressure, they maintain shape during installation and vibration, minimize friction losses, and ensure optimal tendon alignment. This results in improved bonding with grout and enhanced durability throughout the life of the structure.

Manufactured from high-density polyethylene (HDPE), these ducts feature a wall thickness of ≥ 2.0 mm and a density of ≥ 0.034 lb/in³. The material is non-reactive, corrosion-resistant, and suitable for harsh environments such as wastewater plants, silos, and de-icing areas. Bundled in compact packs, they are easy to handle and install.

Precision Couplers
Custom-fit HDPE couplers create tight, seamless, and leak-resistant joints with a maximum 2 mm gap. They ensure proper alignment between duct segments, provide reliable sealing during stressing and grouting, and enable quick on-site installation. Designed for strength and ease of use, they help maintain system performance over time.

Tested & Certified

Each HDPE duct is rigorously tested in compliance with BS EN 523 standards. Tests include shape and dimensional verification, flexural performance, bending resistance, lateral load capacity, tensile strength, and leak tightness. Full mill certificates and laboratory test reports are supplied with every batch, ensuring conformity, traceability, and full compliance with international post-tensioning requirements.

Additional Information

HDPE post tension ducts offer superior corrosion protection and are especially recommended for use in harsh and aggressive environments, such as wastewater treatment facilities, acid tanks, marine structures, and areas exposed to de-icing salts. They are compatible with standard post-tensioning systems and tested for friction losses, bond strength, and flexural performance. Each duct is supplied with installation guidelines, mill certificates, and compliance documentation to meet international project requirements.