From April 15th to 18th, 2026, the 2026 Annual Conference of the China Urban Water Supply and Drainage Association was grandly held at the Shenzhen World Exhibition & Convention Center. With the theme of "Promoting High-Quality Development of Urban Water Supply and Drainage," the conference brought together thousands of representatives from water utilities, design institutes, universities, and equipment/material manufacturers across the country.

As a dedicated practitioner in the trenchless rehabilitation sector, Pro-liner  showcased a number of core technologies and exhibits at Booth D125, Hall 17, and engaged with industry peers in in-depth discussions on the technical pathways for the renovation and rehabilitation of water supply and drainage facilities against the backdrop of urban renewal.

One of the core products on display was the "Multi-scenario Application Series of Drainage Liner". This series includes liners with varying diameters and wall thicknesses, which are suitable for a wide range of complex application scenarios such as municipal sewage pipelines, stormwater pipelines and industrial wastewater pipelines.

To offer visitors a more intuitive understanding of the UV curing process, Pro-liner set up a "Curing Test Zone" at its booth. A small section of uncured liner sample was placed in the zone, with a mini UV light source for dynamic demonstration. Visitors were able to closely observe the process of the liner gradually hardening from a flexible state under UV irradiation, and grasp the basic principles of the resin curing reaction.

From 9:40 a.m. to 10:00 a.m. on April 18th, at Meeting Room CC 105A, Hall 18, Shenzhen World Exhibition & Convention Center, Mr. Wang Yuanfeng, Chief Engineer of Pro-liner, delivered a technical report titled "Discussion on the E- Modulus Testing Method of Liner with Permanent Inner foils for In-situ Curing Rehabilitation of Potable Water Pipelines".

Mr. Wang Yuanfeng first pointed out that while in-situ curing rehabilitation technology has been widely applied in drainage pipelines, its promotion in the potable water pipeline sector has been relatively cautious. This is due to the more stringent requirements for drinking water safety, long-term mechanical properties of lines and interface tightness. Among relevant technologies, the structure of liners with permanent foils has attracted attention in recent years—the permanent inner foil can not only serve as an isolation layer during construction, but also directly contact drinking water after rehabilitation, thus putting forward new requirements for the safety and mechanical properties of materials.

At the end of the report, Mr. Wang Yuanfeng called on the industry to jointly focus on the standardization of the potable water pipeline rehabilitation field. He suggested that on the basis of existing standards such as CJJ/T 210, additional clauses for the special performance testing of liners with permanent inner foils should be supplemented.