SPR®RO
The Large Diameter, Close Fit Liner
ROTALOC®
Product Overview
SPR®RO technology, incorporating the Rotaloc® spirally wound system by RIB LOC®, is a solution for restoring the hydraulic efficiency, reliability and integrity of aging sewers, stormwater pipes and culverts.
The system consists of a single strip of reinforced or unreinforced PVC profile which is progressively wound into the existing pipeline by the SPR®RO / Rotaloc® machine. The edges of the profile are interlocked by the SPR®RO / Rotaloc® machine as it moves inside the deteriorated pipeline, forming a continuous watertight liner.
The winding machine can alter diameter as it traverses the pipeline to produce a liner of optimal diameter.
SPR®RO / Rotaloc® liners can structurally rehabilitate brick, concrete, glass reinforced plastic or corrugated metal sewer and storm water pipelines with diameters from 800 mm (32 inch) to over 1800 mm (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 – 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 minimum community disruption
The deteriorated pipeline is first cleared of debris and obstructions, cleaned and inspected.
The SPR®RO / Rotaloc® 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®RO / Rotaloc® machine rotates and traverses inside the deteriorated pipeline. As winding continues the hydraulic rams forming the “arms” of the machine adjust the diameter at which the liner is wound. This ensures it fits tightly against the wall of the host pipe.
The position of service connections can be logged for later reconnection. The process continues until the SPR®RO / Rotaloc® 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®RO / Rotaloc® has been used to rehabilitate sewers and stormwater lines around the world. It has proven capable of providing a structural liner for severely deteriorated pipelines, and has been installed under difficult site conditions with minimal community disruption.
