RomânăTrenchless Industrial Pipe Rehabilitation with Spin-Cast Technology
Buried industrial process pipelines, cooling water networks, and drainage systems deteriorate from a combination of internal chemical attack, corrosion, and external ground loading - often at locations where excavation would disrupt production operations, damage paving, or disturb contaminated ground. Gemite's Spin-Cast pipe rehabilitation technology applies a centrifugally-spun cementitious mortar lining inside the existing pipe - restoring structural integrity and providing a new chemical-resistant surface without any excavation, making it ideal for industrial plant rehabilitation during planned maintenance windows.
Spin-Cast Pipe Rehabilitation Applications
Process & Cooling Pipelines
Industrial process pipelines carrying aggressive chemicals, hot water, or cooling media deteriorate internally from the combined effect of chemical attack and flow-induced erosion. Where the pipe structure is sound but the internal surface is degraded, Spin-Cast relining provides a new chemical-resistant surface without replacing the pipe - at a fraction of the cost and time of excavation and pipe replacement. The cementitious lining mortar is selected based on the pH, temperature, and chemical composition of the fluid to ensure compatibility.
Industrial Drainage Networks
Underground drainage networks in chemical and industrial facilities carry aggressive effluent - containing acids, alkalis, solvents, and high-temperature waste water - that deteriorates unlined concrete drainage pipework rapidly. Spin-Cast relining of deteriorated drainage pipes restores watertightness (preventing ground contamination) and internal surface integrity - without the disruption and cost of excavating industrial paved areas and disrupting production operations.
Key Performance Characteristics
No Excavation Required
Spin-Cast relining is accessed through existing manholes and cleanout points - no excavation of buildings, paving, or foundations required. Ideal for pipe failures under production areas that cannot be interrupted.
Chemical-Resistant Mortar Selection
The lining mortar is selected based on the specific chemical carried by the pipe - acid-resistant, alkali-resistant, or general-purpose formulations are available to match the industrial process fluid.
Structural Restoration
The cementitious lining adds structural thickness to the existing pipe - providing restoration of the hoop strength in deteriorated pipes and extension of the asset's service life by decades.
Minimal Service Interruption
Spin-Cast relining is completed rapidly - typically 50-200 metres of pipe per day, with the pipe available for service return within hours of application. Planned maintenance windows in industrial facilities are utilised efficiently.
Pipe Rehabilitation - Spin-Cast - Technical Questions
What pipe diameters can be rehabilitated by Spin-Cast?
Spin-Cast technology is applicable to pipes from DN 150mm to DN 1800mm and above. The minimum diameter is constrained by the ability to introduce and manoeuvre the spinning head inside the pipe. For larger diameter pipes (above DN 800mm), man-entry is possible for preparation and quality inspection. Pipe diameter, length of rehabilitation run, and condition of existing pipe are assessed during the pre-project CCTV survey. Our technical team reviews the survey footage and designs the rehabilitation programme.
Does the Spin-Cast lining reduce the internal diameter of the pipe?
The Spin-Cast lining adds a cementitious layer of typically 8-15mm to the internal surface of the existing pipe, reducing the internal diameter by 16-30mm. For most industrial drainage and process pipelines, this reduction is acceptable within the hydraulic capacity design. Where hydraulic capacity is critical, our technical team calculates the impact of the reduced internal diameter on flow capacity for your specific pipe and flow conditions. In some cases, the smooth interior surface of the cementitious lining (lower Manning's roughness coefficient than deteriorated concrete) partially or fully compensates for the diameter reduction in hydraulic terms.
How is the pipe prepared before Spin-Cast relining?
Pipe preparation involves: (1) CCTV survey of the full pipe length to identify structural defects, offset joints, and protruding service connections that may obstruct the spinning head; (2) high-pressure water jetting (typically 200-400 bar) to clean the internal surface of all deposits, biological growth, and loose material; (3) point repair of any localised structural defects (grouted or injection-repaired); (4) verification CCTV survey before lining commencement. All preparation is accessed from existing manholes - no excavation. Our project team manages the complete pre-lining preparation sequence.
Industrial Pipeline in Need of Rehabilitation?
Our specialists conduct a CCTV assessment and design the complete Spin-Cast rehabilitation programme - from pre-lining preparation through lining application and post-lining verification inspection.
- CCTV condition survey and deterioration assessment
- Chemical-resistant mortar selection for your process fluid
- Spin-Cast application programme with shutdown schedule
- Post-lining CCTV verification
Or contact us: office@gemite.tech · +40 232 273 031