company news about The "Light Scalpel" of Underground Pipelines: The Remarkable Effects of UV Curing in Trenchless Repair of Urban Pipeline

Beneath the asphalt roads of bustling cities, a network of drainage and sewage pipes is hailed as the city's "capillaries." However, with the accelerating pace of urbanization, many pipes built decades ago are facing the risk of rupture, leakage, and collapse.

In the past, repairing these deep underground wounds meant "open surgery"—closing traffic and excavating the road surface. Now, a cutting-edge technology called UV-CIPP (ultraviolet curing polymer powder) is acting like a precise "light scalpel," silently performing "minimally invasive surgery" on urban pipelines without the need for excavation.

Traditional pipeline repair methods are typically accompanied by enormous social costs: lengthy construction periods, muddy and dusty roads, and traffic paralysis caused by road closures. Statistics show that in busy commercial areas, the indirect economic losses from road closures often exceed the repair costs themselves. Furthermore, large excavators are highly likely to damage other pipelines such as power lines and fiber optic cables during construction.

The core principle of UV-CIPP (Ultraviolet Cured-in-Place Pipe) technology is to create a "new pipe" on-site inside the old pipe.

• Liner Implantation: Workers pull a flexible fiberglass tube impregnated with photosensitive resin into the old pipe to be repaired.
• Pneumatic Molding: Compressed air is used to inflate the tube, making it adhere tightly to the inner wall of the old pipe.
• Photonic Repair: The core equipment—the UV curing lamp holder—comes into play. This light source cart, equipped with high-power UV LEDs or high-performance mercury lamps, moves at a constant speed through the pipe.
• Instant Curing: Under the irradiation of ultraviolet light of a specific wavelength, the resin undergoes a rapid photochemical reaction, hardening from soft to hard. In just a few hours, a new liner of uniform thickness, high strength, and corrosion resistance "grows" onto the old pipe wall.

UV curing technology exhibits unparalleled "surgical-grade" advantages in pipeline repair compared to traditional methods:

• Extremely Simple Construction: Operations can be completed using existing manholes without damaging the road surface, achieving "repair tonight, reopen tomorrow morning."
• Strong Structure: Repaired pipelines exhibit extremely high strength, typically extending their service life by over 50 years. Their extremely smooth inner walls significantly improve fluid flow capacity.
• Green and Environmentally Friendly: Compared to traditional steam curing, UV curing produces no wastewater and offers more precise control over volatile organic compounds (VOCs), avoiding secondary pollution of groundwater.
• Full-Process Monitoring: The curing lamp holders typically integrate high-definition cameras, allowing construction personnel to monitor the curing process in real-time from the on-site work area, ensuring "zero blind spots" in repair quality.

With the emergence of the concept of "resilient cities," higher demands are being placed on the efficiency of infrastructure maintenance. UV curing technology not only solves the problem of sewage backflow in old residential areas but also shows broad prospects in areas such as industrial chemical pipelines and the repair of road culverts.

In 2026, the iteration of UV LED technology has made repair equipment smaller and more energy-efficient. This "light scalpel" is maturing, extending from the main lines of large cities to the microcirculation of back streets and alleys, safeguarding the safety and order beneath our feet.

The health of underground pipe networks is crucial to everyone's quality of life. The widespread adoption of UV curing technology marks a leap in urban governance from "large-scale demolition and construction" to "refined operation." In the future, with further innovation in light source technology, this "light scalpel" will become even sharper, allowing our cities to be revitalized undisturbed.