SPR®TF
Tight Fit PVC Lining
Product Overview
The SPR®TF pipe rehabilitation process is a solution for restoring the hydraulic efficiency, reliability and integrity of aging sewers, stormwater pipes and culverts.
The SPR®TF method utilizes a lightweight compact machine to lay a single strip of reinforced or unreinforced PVC profile directly against the host pipe wall, producing a close-fit, structural watertight liner, without the need for grouting, in diameters from 1050mm (42 inch) to 1800mm (72 inch).
Features and Benefits
Flow advantages
- Installed to fit tightly against the existing pipe wall - minimum loss of cross-sectional area.
- Flow efficient, smooth bore with circular cross section.
- Winds smoothly around large radius pipeline bends.
- Usually greater hydraulic capacity than the host pipe.
A strong flexible liner
- Can be designed as a structural liner. A range of PVC profiles, with or without steel reinforcement, is available to meet design requirements.
- Structurally efficient circular cross section - even when the host pipe is misaligned.
- Constant wall thickness and shape.
- Machine installed. Installation does not depend on the standard of workmanship in difficult conditions.
Fast installation with minimum community disruption
- Rapid set up, safe work sites and low noise during construction.
- Uses existing access chambers. No need to excavate launch pits.
- No on-site pipe storage required.
- Small support vehicles for less disruption of traffic.
- Can operate with some flow in the existing pipe and the line can be immediately returned to service after winding.
- Installation possible with difficult to reach access chambers – support vehicles and equipment can be placed remotely.
Proven pipe material
- Made from a similar grade of PVC as new sewer and drainage pipe.
- Cell Classification of 13354 in accordance with ASTM D1784.
- Profile sealing materials are tested to confirm suitability in high ambient temperature sewer environments.
- Factory manufactured, with consistent material properties.
Process Overview
Fast installation with compact machinery
The deteriorated pipeline is first cleared of debris and obstructions, cleaned and inspected.
The SPR®TF winding machine is lowered to the base of the access chamber through a standard opening. The PVC profile is fed into the machine from an above ground spool.
Winding commences as the SPR®TF machine lays the PVC profile directly against the host pipe wall as it traverses inside the deteriorated pipeline. Winding continues as the profile is fed into the machine through the lined section of the host pipe.
The position of service connections can be logged for later reconnection. The process continues until the SPR®TF winding machine reaches the end of the pipeline length to be rehabilitated.
The ends of the liner at both access chambers are sealed and rendered to make them smooth with the host pipe.
Lateral connections can be cut and sealed immediately on completion of liner installation.
Project Experience
SPR®TF is an exciting new technology for the rehabilitation of sewers, stormwater and culvert lines. It has already proven capable of providing a structural liner for severely deteriorated pipelines, and has been installed under difficult site conditions with minimal community disruption.
