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For the inspection, repair, operation, and digital management of urban water supply and drainage networks
Dec.05,2025
CIPP UV is one of the in-situ curing methods for trenchless restoration. In this CIPP UV technology, the glass fiber is woven into a hose impregnated with resin, and then it is pulled into the original pipe to inflate and expand to cling to the original pipe. Under the action of ultraviolet light, it is an in-situ curing method to make the resin solidify to form UV CIPP lining with certain strength.
Features: CIPP UV method can produce hose up to 500m in length at one time, even if the size of a section of the pipe changes, or the pipe has a radian within 30°, a wrinkle-free repair can be carried out. Hoses are suitable for all kinds of pipes: round, oval, egg-shaped, square, and other special shapes. Lining repair range: from DN150 to DN1200, lining wall thickness from 3mm to 12mm. Therefore it is flexible, diverse, and fast. The repair time is short and it can be put into use immediately after repairing. So it is a suitable method for cured in place pipe lining.
Compared with the traditional thermal curing technology, the CIPP UV technology has larger liner stiffness and smaller liner wall thickness under the same load. The curing time is short, as the ultraviolet light source gradually moves forward, the cooling of the lining also occurs continuously, which reduces the internal stress caused by curing shrinkage in the lining. A camera can be installed on the UV curing equipment to detect the liner curing condition in real-time. In the UV curing process, the problem of the initial curing end caused by the cross-section height of the drainage pipe port is not considered. No wastewater is produced in the curing process.
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Overcoming Challenges Faced by Pipe Crawler Robots in Navigating Complex Pipe Networks
In recent years, the use of pipe crawler robots has become increasingly prevalent in various industries such as oil and gas, water management, and construction. These innovative robots are designed to navigate through intricate pipe networks with ease, carrying out inspections, maintenance, and repairs efficiently. However, despite their advanced capabilities, pipe crawler robots face several challenges when operating in complex pipe networks. In this blog post, we will explore some of the common obstacles faced by these robots and how engineers are working to overcome them.
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Inserted Lining High-Density Polyethylene (HDPE) Pipeline Repair Technology
Inserted lining high-density polyethylene (HDPE) pipe is a brand new pipe rehabilitation technology. The technology is to insert a HDPE pipe of suitable size into the old pipe that needs to be repaired. It takes advantage of the rigidity and strength of the old pipeline as the bearing structure, as well as the characteristics of HDPE pipe's corrosion resistance, wear resistance and permeability resistance, to form a "pipe in pipe" composite structure, so that the repaired pipeline has the comprehensive performance of steel pipe and HDPE pipe. This technology, by using the feature of HDPE pipe that it can automatically recover its original physical shape after deformation, is to retract HDPE pipe with special equipment. Before inserting, the lining pipe is pulled into the target pipe with a certain traction force as well as speed. Then the pulling force is removed and the liner is restored to its original diameter and tightly bonded with the outer pipe. The outer diameter of the lineing pipe is slightly larger than the inner diameter of the original tube. After the lining is completed, the lining pipe and the original tube are firmly combined and the thickness of the liner can be designed according to the needs.
Dec.05,2025
Trenchless Rehabilitation Technology and Application of Pipeline Lining
Since the rise of pipeline trenchless rehabilitation technology in developed countries in the 1980s, it has become a widely used method for underground pipeline rehabilitation. By avoiding large-scale excavation, this technology reduces the impact on urban traffic, the environment, and residents' lives, hence gaining extensive attention and preference. This article will provide a detailed introduction to the main methods and application fields of trenchless rehabilitation technology and analyze its important role in urban network renovation.
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