WHAT IS FOLD&FORM LINING TECHNOLOGY?
Fold and Form lining technology is an advanced trenchless pipeline repair technology that utilizes the reheating and reshaping properties of thermoplastic polymer materials. Factory-preformed I-shaped or C-shaped liners are softened with steam, pulled into the host pipe, and then expanded through secondary heating and pressurization to tightly adhere to the existing pipe wall. Once cooled, the liner forms a high-strength structural rehabilitation layer.
Overview
FOLD&FORM PIPE LINING TECHNOLOGY
This technology is suitable for both pressure and gravity pipelines ranging from DN100 to DN1200, including water supply and drainage systems, offering broad applicability, high efficiency, and environmental benefits. Anyue's fold&form technology has successfully achieved the world's largest diameter (DN1200) liner application and repeatedly set global records for single-segment repair lengths in large-diameter pipelines, establishing itself as a leading solution in pipeline rehabilitation.
Lining Process
Key Features
100% Trenchless Installation
Ultimate Flexibility
Low-Maintenance Sealing
NSF Certified PVC Liners
Seamless Bonding
Eco-Driven Efficiency
ANYUE FOLD&FORM LINER
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Our liner technology is spearheaded by PhD-led R&D, offering versatile solutions for rehabilitating drainage, water supply, and gas pipelines.
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The proprietary internal heating system reduces construction time by 30% and fuel consumption by 40% compared to traditional methods.
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Our patented Pressure Pipe End Flanging Technology ensures secure and leak-proof connections for pipeline interfaces.
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Our NSF 61-certified PVC fold & form liners make potable water pipeline rehabilitation more efficient and cost-effective. They can withstand pressures of up to 16 bars (230 PSI), which is double or even triple the pressure of standard water mains.
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We deliver the world’s largest DN1200 rehabilitation capacity and achieve single-segment installations over 150 meters for DN1000 pipelines.
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A decade-proven team of experts provides professional construction and after-sales services with unmatched reliability.
Test Item | Test Value | Test Standard |
|---|---|---|
Flexural Modulus | >290,000 psi (2,000 MPa) | ASTM D790 |
Flexural Strength | >5,800 psi (40 MPa) | ASTM D790 |
Tensile Modulus | >174,000 psi (1,200 MPa) | ASTM D638 |
Tensile Strength | >4,360 psi (30 MPa) | ASTM D638 |
Pipe Diameter | Maximum Length for Single Repair (m) |
|---|---|
DN100 | 200 |
DN200 | 200 |
DN300 | 200 |
DN400 | 200 |
DN500 | 200 |
DN600 | 200 |
DN700 | 200 |
DN800 | 150 |
DN900 | 150 |
DN1000 | 120 |
DN1100 | 100 |
DN1200 | 80 |
Reduced-Diameter Pipeline Testing
Pressure Burst Testing
Maximum Bend Angle of 90°
ANYUE FOLD&FORM Equipment
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Innovative dual heating modes (internal and external) for flexible and efficient pipeline rehabilitation.
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Proprietary internal heating technology delivers 50% faster heating efficiency and 50% lower fuel consumption compared to external heating methods.
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Optimized in-cab equipment integration ensures stable operation and enhanced vehicle safety.
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Certified inspection-exempt steam generator equipped with automatic pressure relief for fail-safe performance.
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Dedicated toolset enables user-friendly operation and maximizes workflow efficiency.
Component | Specification |
|---|---|
Steam Generator | Rated evaporation capacity: 200kg, automatic pressure relief safety protection, inspection-free |
Mixing Chamber | Built with stainless steel 304 and thermal insulation material |
Steam Box | Optional external heating or internal heating |
Steam Steel Water Tank | Made of stainless steel 304, with level gauge |
Reel Feeding Machine | Speed-adjustable motor with brake, making feeding control easy |
Low-noise Diesel Generator | 50KW, low noise, rated flow: 5.2 m³/min |
Refrigerated Screw Air Compressors | Low noise, rated flow: 6.8 m³/min |
Refrigerated Compressed Air Dryer | High-efficiency refrigeration, small volume, maximum gas processing volume: 6.8 m³/min |
Container Sizes | Container: L: 9000 W: 2500 H: 3830 |
Steam Generator | Rated evaporation capacity: 200 kg/h |
Case Study
DN600 POTABLE WATER PIPELINE REPAIR IN FUZHOU
Project Overview:
Location: Fuzhou City, China Date: August 2024
This project focuses on the trenchless repair of the DN600 potable water pipeline along Shangxiadian Road in Fuzhou City. The pipeline, which extends 1,100 meters, has shown significant signs of corrosion and localized damage due to long-term service.
Challenges: The pipeline's proximity to power conduits creates a confined working space. Additionally, sections exhibit settlement and undulations, along with bends that complicate the insertion process. Each repair segment spans 160 meters, adding to the complexity of the project.
To address these issues efficiently, a rapid trenchless pipe lining approach was recommended, followed by the application of a drinking water-grade Fold and Form PVC liner for comprehensive restoration.