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Yongke specializes in manufacturing ultraviolet cured-in-place pipe (UV-CIPP) liners for trenchless rehabilitation in pipeline and culvert systems. The liner presents a smooth, impermeable inner surface that minimizes fluid friction, while its dense fiberglass matrix feels solid and structurally resilient even before curing. Designed for minimal disruption, this pipe-in-pipe solution restores aging infrastructure without the need for extensive excavation, ensuring continuous municipal and industrial operations while significantly reducing project timelines.

This is a rapidly growing rehabilitation method where a pipe is created within an existing host pipe and then cured with the use of UV curing technologies. The finished product is proven to extend the life of the pipe for another 50 to 100 years! By utilizing targeted ultraviolet light, the specialized resin hardens within minutes, transforming the flexible sleeve into a rigid, load-bearing conduit. This process effectively seals structural cracks, stops groundwater infiltration, and resists aggressive root intrusion, delivering a permanent structural upgrade that withstands heavy soil and traffic loads over decades of continuous service.

UV-CIPP Liner is constructed with a puncture-resistant, removable inner foil, premium, corrosion-resistant fiberglass, and advanced UV resins - proven to be one of the strongest products on the market. The innovative "pipe-in-pipe" architecture relies on top-tier E-CR glass fibers that provide exceptional mechanical strength while maintaining a thinner wall profile compared to traditional felt liners. This multi-layered construction ensures that the liner can endure the physical stress of being pulled through damaged host pipes without tearing or compromising the resin matrix.
UV CIPP Liners can be procured in both unsaturated polyester and vinyl ester resins and are offered for circular and non-circular pipes from 6” (150mm) to 78” (2000mm), and in thicknesses from 2.4mm to 18mm in 1mm increments. This broad range of sizing ensures perfect adaptability for municipal sewer lines, industrial effluent networks, and stormwater culverts. The ability to customize the thickness precisely allows engineers to match the exact structural requirements of the damaged host pipe, ensuring optimal material usage and uncompromising long-term performance.
Ensuring absolute reliability in underground infrastructure requires strict adherence to international manufacturing protocols. Every phase of our production is meticulously documented and tested to guarantee structural consistency.
• Fully compliant with ASTM-2019 – Standard Practice for Rehabilitation of Existing Pipelines and Conduits by the Pulled in Place Installation of Glass Reinforced Plastic (GRP) Cured-in-Place Thermosetting Resin Pipe (CIPP). Meeting this rigorous standard guarantees that the physical properties, chemical resistance, and long-term creep retention of the liner will perform predictably under harsh subterranean conditions. Project managers can specify this product with absolute confidence, knowing it meets the most demanding engineering specifications globally.
| Parameter | Specification Detail |
|---|---|
| Diameter Compatibility | 6” (150mm) to 78” (2000mm) for circular and non-circular pipes |
| Thickness Options | 2.4mm to 18mm (available in precise 1mm increments) |
| Regulatory Compliance | ASTM-2019 Certified |
| Expected Lifespan | 50 to 100 years post-installation |
Liners are fabricated from the premium-grade E-CR-Glass fiberglass and UV-cure resins. The E-CR glass is specifically selected for its exceptional resistance to acidic and alkaline environments commonly found in sanitary sewers. When combined with our precision-formulated resins, the resulting composite material delivers unparalleled stiffness and tensile strength, preventing future collapses and ensuring a smooth, uninterrupted flow.

Each liner is constructed with a puncture-resistant, removable inner foil and tough UV protective outer foil. This ensures tough construction, for safe and easy handling and installation by the contractor. The outer foil acts as a durable shield against abrasion from debris or sharp edges within the existing pipe. Meanwhile, the inner foil is designed for clean removal post-curing, revealing a glass-smooth interior surface that significantly improves the hydraulic capacity of the rehabilitated line.
Modern pipeline rehabilitation demands not only structural integrity but also operational efficiency and environmental responsibility. Our UV-CIPP solutions are engineered to streamline the installation process while minimizing ecological impact in urban environments.
Resin viscosity is meticulously monitored during the wet-out process which provides manageable handling during installation, minimal mess on site. Because the liner is factory-impregnated and delivered in a stable gel state, there is absolutely no need for complex, messy resin mixing at the job site. This pre-impregnation allows the liner to be pulled into place rapidly, even under active water flow conditions, dramatically reducing the time required for bypass pumping and site preparation.
Liners are manufactured in an advanced, precision-controlled facility, with a digital camera QA/QC system, to ensure uniform impregnation and thickness throughout the entire product. Every square meter of the fiberglass matrix is visually inspected by optical sensors to detect any dry spots or inconsistencies. This meticulous factory-controlled environment eliminates the variables associated with ambient temperature and humidity that often plague traditional on-site wet-out methods.
Available in polyester (styrenated), low VOC and styrene-free vinyl resins. For environmentally sensitive projects, our low VOC and styrene-free options provide a safe, odor-free curing process. Unlike traditional thermal curing methods that release chemicals and generate contaminated wastewater, the UV curing process is entirely self-contained. It meets the most stringent modern urban environmental standards, ensuring the protection of local waterways and the safety of installation crews.
By integrating rapid UV curing technology with premium materials, this system offers an unmatched balance of speed, durability, and environmental stewardship for critical infrastructure projects.