Double-Wall (Dual Containment) HDPE Pipe

Product Overview: HDPE Double-Wall (Dual Containment) Piping System

Composite construction with an HDPE carrier pipe (primary) inside an HDPE containment pipe (secondary), joined via electrofusion welding that fuses both pipe walls simultaneously at each connection point. Centralizers maintain concentric carrier pipe positioning within the containment pipe; the annular space is sloped toward monitoring/sump points for interstitial leak detection. Available with sensing cable, low-point sensor, or pressure/vacuum monitoring leak detection options. Manufactured from PE80/PE100 grade high-density polyethylene, with sizes ranging from small-diameter branch lines up to large-diameter main transfer lines. Compatible with gasoline, diesel, kerosene, and other hydrocarbon fuels. Tested and compliant with EN 14125 (Thermoplastic Piping and Ancillary Equipment for Underground Fuel Installations).

Key Features

1. Dual-Wall Leak Protection — Inner carrier pipe conveys fuel; outer containment pipe captures any leakage before it reaches soil or groundwater.

2. Interstitial Leak Monitoring — Annular space between walls supports sensing cable, sensor, or pressure/vacuum leak detection systems.

3. Fully Fused Joints — Electrofusion welding joins both carrier and containment walls simultaneously, eliminating weak butt-weld points.

4. Corrosion-Free Material — HDPE construction resists corrosion, chemical attack, and environmental degradation compared to metal piping.

5. International Standard Compliance — Tested to EN 14125 for underground fuel installation piping. 6. Broad Fuel Compatibility — Suitable for gasoline, diesel, kerosene, and other liquid fuel transfer applications.