On May 26, 2025, the Zhejiang Urban Water Industry Association officially approved and released the "Technical Standard for UV Curing In Situ Repair of Drainage Pipelines" (T/ZJWIA 0013-2025), which will be officially implemented from June 1, 2025. Zhejiang Youwei New Materials Co., Ltd., as a core participating enterprise, has deeply participated in the formulation of this standard with its profound technical accumulation and rich engineering experience. This milestone event marks a new stage of standardization in the field of drainage network repair in Zhejiang Province, providing solid support for enhancing the safety and sustainability of urban "blood vessels". Youwei New Materials empowers the industry with professional strength, jointly builds technological benchmarks, assists in the construction of "Beautiful Zhejiang", and promotes green and efficient development.
As a province with a leading urbanization rate, Zhejiang Province's demand for underground pipeline repair continues to grow, and there is an urgent need to standardize technical standards to ensure project quality. It has become the first group standard in the province to systematically regulate UV-CIPP technology. This standard specifies the technical boundaries and is applicable to the repair of non pressure pipelines ranging from 200mm to 2000mm and pressure pipelines ranging from 200mm to 1500mm, providing authoritative basis for construction. Through strict quality control and standard protection, the safe operation of urban infrastructure is ensured, avoiding the risk of leakage or collapse caused by aging pipeline networks, thereby enhancing the overall resilience of the city.
As a leading enterprise in UV curing materials and processes in Zhejiang Province, Youwei New Materials has participated in the technical discussions and formulation of standards throughout the process, contributing key professional data. The engineering team of Youwei has transformed optimized processes into standard terms through years of construction experience within the province. They have led the development of technical parameter indicators for pressure and non pressure pipeline functional membranes. These localized adaptation works ensure that materials can effectively resist environmental corrosion in practical applications and improve the durability of repairs.
The standard integrates multiple technological innovations, stemming from the successful case practice of Youwei New Materials in Zhejiang Province. In terms of repair efficiency, the standard allows for a maximum repair length of 200 meters per section (applicable to pipelines below DN1500) and a maximum repair length of 150 meters per section (applicable to pipelines above DN1500), which to some extent reduces the traffic impact caused by construction. This is due to the rapid response characteristics of UV curing technology, which ensures precise curing process through real-time monitoring system and avoids the high risks of traditional methods. At the same time, the standard emphasizes long-term and durable design, with a structural repair life of up to 50 years, suitable for the complex underground environment in Zhejiang.
Future Development Plan
With the formal implementation of the standard, Youwei New Materials will continue to deepen its technological research and development, iterate material performance to adapt to the diverse pipeline repair scenarios in Zhejiang Province. The company plans to develop more efficient resin systems and functional membranes to address different climate and water quality challenges, ensuring that restoration solutions are more flexible and adaptable. At the same time, Youwei will increase research and development investment, explore intelligent equipment upgrades, and improve construction accuracy and efficiency. These measures aim to consolidate Youwei's leading position in the industry and promote the promotion and application of UV curing technology nationwide.
The standard will be implemented throughout the province from June 1, 2025, and will be supervised and implemented by the Zhejiang Urban Water Industry Association. The standard number T/ZJWIA 0013-2025 specifies the scope of application and technical requirements, and the implementation details include a strict acceptance process. For example, after repair, the lining pipe must pass mechanical and corrosion resistance tests to ensure compliance with core indicators. The construction unit shall follow the pre-treatment specifications, such as pipeline cleaning and hose introduction, to avoid operational errors. This process emphasizes traceability, and all data needs to be recorded and archived for later auditing and maintenance.
The release of this standard is an important step towards the standardization of pipeline repair technology in Zhejiang Province, and calls on all parties in the industry to actively adopt and implement it. The construction unit should train the team as soon as possible, master the standard requirements, to ensure the quality of the project and avoid risks caused by non compliant operations. At the same time, government agencies need to strengthen supervision and promote the popularization of standards, such as encouraging green restoration projects through policy support. Youwei New Materials promises to provide free technical consultation and solutions to help partners smoothly transition. This will accelerate industry upgrading, reduce pipeline failure rates, and ensure the safety of urban residents' lives.
