CIPP / Gravity Pipe Relining
Structural trenchless pipe rehabilitation using cured-in-place lining for sewer, stormwater, municipal, industrial and mining pipelines.
Nationwide South Africa Coverage
HydroTrace provides this service across South Africa for residential, commercial, industrial, municipal and mining infrastructure clients. We support Gauteng, Western Cape, KwaZulu-Natal, Eastern Cape, Free State, Mpumalanga, Limpopo, North West and Northern Cape projects.
Technical Overview
CIPP relining creates a new structural pipe inside an existing deteriorated host pipe. A resin-saturated liner is installed through existing access points and cured to form a continuous internal pipe without full excavation.
Correct relining depends on inspection, cleaning, liner design, controlled curing and final QA verification.
Problems This Service Diagnoses or Solves
Host Pipe Defects
- Cracks and fractures
- Joint displacement
- Root intrusion
- Infiltration
- Corrosion
Structural Conditions
- Ovality
- Partial collapse risk
- Missing pipe wall sections
- Groundwater loading
- External loading
Operational Problems
- Recurring blockages
- Exfiltration
- Sewer surcharge
- Stormwater leaks
- Maintenance failures
Full Technical Process
Structural CCTV Inspection
The host pipe is inspected to determine geometry, defects, connections, infiltration, ovality and suitability for lining.
Mechanical Cleaning & Descaling
Roots, grease, scale, tuberculation and debris are removed. Surface preparation is critical for successful liner installation.
Liner Design & Resin Calculation
Liner thickness and resin volume are selected according to diameter, depth, loading, groundwater conditions, ovality and design life requirements.
Liner Impregnation
The liner is saturated with resin under controlled conditions to achieve full wet-out and correct resin distribution.
Installation by Inversion or Pull-In
The liner is installed using inversion, air inversion, water inversion or pull-in-place methods depending on access and project requirements.
Curing
The resin is cured using ambient, hot water, steam or UV curing. Temperature and curing time must be controlled to achieve structural performance.
Robotic Reinstatement
Lateral connections and branches are reopened using robotic cutting systems.
Final CCTV QA/QC
The completed liner is inspected for wrinkles, defects, cure quality, connection reinstatement and hydraulic performance.
Where HydroTrace Uses This Service
- Sewer mains
- Stormwater pipes
- Commercial drainage
- Municipal gravity pipelines
- Mining drainage
- Industrial gravity lines
- Road crossings
- Infrastructure corridors
Equipment & Technical Tools
- CCTV crawlers
- Jetting and descaling equipment
- Inversion drums
- Pull-in systems
- Steam/hot water/UV curing equipment
- Robotic cutters
- QA inspection systems
Operational Benefits
- Avoids full excavation
- Creates a structural internal pipe
- Reduces infiltration and exfiltration
- Extends asset life
- Reduces traffic and surface disruption
- Improves hydraulic performance
CIPP / Gravity Pipe Relining Technical FAQs
What is CIPP relining?
CIPP stands for cured-in-place pipe. It is a trenchless process where a resin liner is cured inside the existing pipe to form a new internal pipe.
Does relining require digging?
Often it can be installed through existing manholes or access points. Some projects still require limited access excavation.
How do you confirm quality?
HydroTrace performs post-installation CCTV inspection and checks connection reinstatement, liner finish and visible defects.
Need CIPP / Gravity Pipe Relining?
Send HydroTrace the site details and we will confirm the correct inspection, diagnostic or rehabilitation approach.
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