Successful UV Liner Installation: Mini LED CIPP Solves Small Sewer Challenges

Efficient Trenchless Repair for DN200 Sewers with Daoyunai’s Mini LED UV CIPP Equipment

In April 2025, Daoyunai Energy Saving Technology Suqian Company successfully completed a UV liner installation in Suzhou, demonstrating the effectiveness of Mini LED UV CIPP technology for small-diameter sewer rehabilitation (DN100-DN250). This project highlights how trenchless UV curing can overcome challenges in tight spaces where traditional methods fail.

Project Overview

• Location: Suzhou, China

• Pipe Diameter: DN200

• Section Lengths: 20m, 30m, 40m

• Installation Period: March 30 – April 20, 2025

• Key Technology: UV curing with Daoyunai’s fiberglass resin liner

• Equipment Used: Mini LED UV CIPP System (DN100-DN250 compatible)

Challenges & Solutions

The sewer pipes in this project were:
✔ Small-diameter (DN200) with multiple bends
✔ Short section lengths (20m-40m)
✔ Located in confined spaces (riverbanks, villages)
✔ Inaccessible to large machinery

Traditional excavation or steam-cured CIPP would have been costly, disruptive, or impossible. Instead, Daoyunai’s Mini LED UV CIPP equipment provided:
✅ Compact & portable design – Easy transport and setup in tight areas
✅ UV-LED cold curing – No heat risk, energy-efficient operation
✅ Fast installation – Reduced downtime compared to steam curing
✅ High-quality resin liner – Durable, seamless pipe renewal

Why UV CIPP Was the Best Choice

1. No Excavation Needed – Avoided road closures and property damage.

2. Precision Curing – UV-LED technology ensured even hardening without wrinkles.

3. Eco-Friendly – Low emissions, no wastewater discharge vs. traditional methods.

4. Long-Term Performance – The glass fiber resin liner resists corrosion and cracks.

Customer Satisfaction

The asset owners and contractors praised the results:

• Smooth, jointless pipe interior with no leaks

• Minimal disruption to surrounding areas

• Cost savings vs. dig-and-replace methods

Daoyunai’s Mini LED UV CIPP System: Ideal for Small-Diameter Sewers

This Suzhou case proves that UV trenchless repair is ideal for:

• Municipal sewer networks (DN100-DN250)

• Villages, historic areas, and narrow urban spaces

• Emergency repairs requiring fast turnaround

Technical Advantages of Daoyunai’s Equipment

✔ Lightweight & portable – Fits where large rigs can’t
✔ UV-LED efficiency – Lower power demand vs. mercury lamps
✔ Real-time monitoring – Ensures proper curing
✔ Customizable liners – For bends and varying pipe lengths

Conclusion: The Future of Small-Pipe Rehabilitation is UV CIPP

This Suzhou UV liner installation showcases how Daoyunai’s Mini LED UV CIPP technology delivers faster, cleaner, and more sustainable sewer repairs in constrained environments.

Need a trenchless solution for small-diameter pipes?