Daoyunai-Leading Manufacturer of Trenchless Pipe Inspection and Rehabilitation

Daoyunai-Leading Manufacturer of Trenchless Pipe Inspection and Rehabilitation

Daoyunai specializes in the research, development, and manufacturing of advanced sewer pipeline inspection and trenchless rehabilitation equipment and materials for underground municipal drainage systems.

Our CCTV pipe inspection systems utilize high-definition video technology and intelligent robotics. These inspection robots navigate through pipelines, transmitting real-time data to the control unit. The system captures detailed visual and structural information of the pipe interior, enabling accurate condition assessment and comprehensive reporting.

Our trenchless UV curing rehabilitation equipment integrates all core components into a single compact system, including a smart control unit, cable reels, multiple pipe diameter light rigs, advanced LED and high-pressure mercury UV lamp technology, high-capacity air compressors, and Japanese-made generators. The system ensures stable operation and efficient UV light penetration for reliable in-situ pipe lining.

We also provide high-performance CIPP (cured-in-place pipe) liner materials, composed of fiberglass fabric and resin-impregnated flexible liners, fully customizable in length, thickness, and diameter to meet a wide range of project requirements.

As of 2025, Daoyunai has sold over 350 kilometers of liner materials, more than 20 sets of UV curing systems, and over 400 sets of video pipe inspection devices—serving municipalities and contractors worldwide with reliable trenchless technology solutions.

Daoyunai Energy Saving Technology Limited has been committed to manufacturing trenchless CIPP UV cure systems with liners and CCTV inspection crawlers for underground pipelines to service customers all over the world.

The product range covers four series and more than 20 models in the underground pipeline trenchless repair industry:

1. UV curing and repair integrated system D919: LED lamp curing and high-voltage mercury lamp curing.

2. UV cure liner: from diameter DN200 up to DN1800

3. Hot water cure liner: impregnated liner to invert by water gravity and cure by hot water

4. Pipeline inspection robots crawler D18 and D18s: CCTV video inspection of pipeline defects

5. Pipeline periscope D16S: quickly  view the internal defects of the pipeline

Headquartered in Shanghai, Daoyunai has a number of independent intellectual property rights and also has a manufacturing base and R&D and testing center in Suqian City, Jiangsu Province, covering an area of more than 35000 square meters, which fully implements the international quality management system.

Focused on producing trenchless CIPP system with liners and inspection CCTV

Committed to providing solutions for reducing costs and improving efficiency