Semi Rigid Ventilation Ducting
Heavy-duty semi-rigid ducting engineered to extract foul air, airborne dust, and hazardous pollutants from tunnel headings and underground workings. Manufactured from FRAS-approved PVC-coated polyester fibre and reinforced with high-tensile continuous spring wire.
Technical Data & Specifications
Product Gallery & Workshop Examples
Actual flexible ducting manufactured at our Lisarow workshop for underground coal and civil tunnelling projects.
Joining SystemQuick Release Coupling Joint
Heavy-duty steel quick release coupling band paired with brass eyelet cuffs for rapid, airtight underground joints that withstand high suction pressures.
Tunnel RoutingHigh Flexibility Around Bends
Continuous high-tensile spring wire allows long runs to flex effortlessly around tight underground headings and tunnel contours without choking airflow.
Workshop BuildHeavy-Duty Spiral Construction
Manufactured with up to 9mm high-tensile spring steel spiral and robust steel end rings, engineered specifically to resist collapse under exhaust suction.
Transport & StorageCompressed Ducts Ready for Transport
Compressed flat for cost-effective freight to remote mine sites across Australia. Easy underground handling and rapid re-expansion on site.
FRAS ApprovedLarge Diameter FRAS Ventilation Duct
Custom manufactured up to 1.7M diameter with full FRAS approval. Executes a tight 90-degree bend while keeping full cross-sectional airflow uncompromised.
Custom ProfilesFlared & Oval Ducting
Speciality oval profiles and flared transitions designed with custom rope ends and collars to fit low-headroom headings and varied fan outlets.
Industrial BellowsSquare & Rectangular Bellows
Custom-engineered expansion bellows, loading chutes, and hopper transitions built for severe vibration, material transfer, and plant ventilation.
Specify your semi rigid ducting
Tell us the length, diameter, and end type you need — we'll manufacture to your exact specification.
Request a Quote