Daoyunai Energy Saving Technology Limited Achieves Prestigious TUV Rheinland Certification for UV CIPP Liner

Daoyunai Energy Saving Technology Limited Achieves Prestigious TUV Rheinland Certification for UV CIPP Liner, Reinforcing Leadership in Trenchless Pipeline Rehabilitation

Daoyunai Energy Saving Technology Limited , a pioneering force in sustainable infrastructure solutions, has proudly attained the esteemed product certification from TUV Rheinland (China) Ltd. for its UV CIPP Liner Material for Trenchless Repair. This significant accomplishment, under certificate number CH-50698921-0001, underscores the company's unwavering commitment to quality, innovation, and international standards in the trenchless pipe repair industry.

The certification, issued on November 18, 2025, and valid for five years, is based on the rigorous Chinese national standard GB/T 41666.4-2024. It was granted following the comprehensive certification scheme of Type approval + initial factory inspection + Surveillance, confirming that Daoyunai's products and manufacturing processes meet the highest benchmarks for performance, safety, and reliability.

Validating Excellence and Building Trust

This TUV Rheinland certification is far more than a compliance milestone; it is a powerful testament to Daoyunai's technical prowess and corporate integrity. TUV Rheinland is a world-renowned independent testing service provider, and its mark is globally recognized as a symbol of premium quality and safety. For specifiers, contractors, and municipal authorities, this certification serves as a critical trust signal, assuring them that Daoyunai's UV CIPP liners are manufactured to exacting specifications suitable for demanding pipeline rehabilitation projects.

A Strategic Advantage in a Growing Market

The trenchless technology sector is rapidly expanding as cities worldwide seek efficient, cost-effective, and minimally disruptive methods to rehabilitate aging underground infrastructure. By aligning its flagship product with the latest national standard (GB/T 41666.4-2024) and securing independent verification from TUV Rheinland, Daoyunai positions itself at the forefront of this growth.

"This certification is a cornerstone of our global strategy," said a spokesperson for Daoyunai Energy Saving Technology Limited. "It validates our R&D investments and rigorous quality control systems. For our clients, it translates into unparalleled confidence—knowing they are using a product proven to be durable, effective, and manufactured under consistently supervised conditions. It strengthens our value proposition as a total solutions provider in pipeline sustainability."

The Certification: A Deep Dive into Value

• Internationally Recognized Credibility: The TUV Rheinland seal is a passport to broader market acceptance, enhancing Daoyunai's competitiveness both domestically and for future international projects.

• Commitment to the Highest Standards: Certification according to GB/T 41666.4-2024 demonstrates proactive adherence to China's most current and specialized standards for trenchless repair, showcasing industry leadership.

• Holistic Quality Assurance: The "Type approval + initial factory inspection + Surveillance" model ensures not just a one-time test, but an ongoing commitment to quality, with TUV Rheinland conducting regular audits to maintain certification integrity.

• Risk Mitigation for Projects: Engineers and project owners can specify Daoyunai's certified liner with reduced technical risk, facilitating smoother project approvals and execution.

About Daoyunai Energy Saving Technology Limited

Daoyunai Energy Saving Technology Limited is a leading innovator and manufacturer dedicated to advanced trenchless pipeline rehabilitation technologies. Specializing in UV-CIPP (Cured-In-Place-Pipe) solutions, the company provides environmentally responsible, efficient, and long-lasting alternatives to traditional pipe replacement. With a core philosophy centered on quality, sustainability, and client success, Daoyunai empowers municipalities and utilities to extend asset life with minimal social and environmental impact.

Looking Ahead

With this pivotal certification in hand, Daoyunai Energy Saving Technology Limited is poised to accelerate its mission of revolutionizing pipeline repair. The company will continue to leverage this credential to forge stronger partnerships, support major infrastructure renewal programs, and drive the adoption of superior trenchless technologies worldwide.