How many types of pipe non-invasive repair techniques are there?

Release time:

2025-03-07

How many types of pipe non-invasive repair techniques are there?

The emergence of pipe non-intrusive repair has reduced the impact on roads and some buildings. This technique is carried out through small-scale excavations. The underground pipe non-intrusive repair technology is the latest construction technology. Pipe non-intrusive repair companies have ensured normal life by utilizing this technology. So, how many types of pipe non-intrusive repair processes are there?

The construction process of pipe non-invasive repair technology (pipe lining repair technology):

1. CIPP Inverted Pipe Liner Technology - Construction Process

The reverse lining technology uses a composite fiber-reinforced hose with a waterproof and anti-corrosion protective film as the carrier. Through a dedicated impregnation equipment on-site, epoxy resin is impregnated into the hose. After impregnation, the hose is flipped using a reverse lining device, driven by water pressure or air pressure, from one end of the pipeline to the other. Under pressure, the lining layer is heated or cured at room temperature. The cured lining hose adheres closely to the inner wall of the original pipeline, forming a highly sealed and smooth composite pipe with the original pipeline as a whole.

Pipeline cleaning and inspection → Inner lining of hose pipe → Steam curing of the inner lining hose → Removal of excess inner lining hose from the pipeline inner lining → Port treatment.
2. Local Point-to-Point Pipe Lining Technology - Construction Process

When there are local cracks, leaks or damages in the pipeline, or when the pipeline needs urgent repair due to local damage, the local pipeline inner lining repair technology can be used to repair the pipeline. Application scope: pipeline diameter 200mm - 1200mm. Solution: Use a special pipeline repair device, introduce resin-impregnated non-woven fabric into the damaged part of the pipeline, and expand the repair device through appropriate air pressure. The resin-impregnated non-woven fabric is pressed onto the damaged part of the pipeline inner wall. After the resin cures, the non-woven fabric is fixed at the damaged part of the pipeline, and the entire repair process takes -3 hours.

Pipeline cleaning and inspection → Installation of local point-to-point pipeline liners → Local point-to-point curing of pipeline liners.

3. High-density polyethylene pipe interface inner lining technology - Construction process

The high-density polyethylene short joint inner lining process is carried out without excavating the road surface. It utilizes two adjacent inspection wells for construction, using the pipe segment to be repaired as the carrier. Polyethylene short joints with specially cut pipe openings are installed section by section into the pipe segment to be repaired. The short pipes are connected through collision. After the interface between the pipe segment to be repaired and the HDPE pipe is sealed, grouting is performed in the gap between the HDPE pipe and the original pipe to achieve the purpose of fixing the lining pipe.

Pipeline cleaning and inspection → Installation of high-density polyethylene short section pipe linings → Port treatment → Grouting for filling gaps in the lined pipes.

4. Local Reinforcement and Sealing Technology for Pipelines - Construction Process

The local reinforcement and leak sealing technology for pipelines is a specialized technique designed for leakage at the joints or minor misalignment of large-diameter pipelines. This technology involves initially addressing the leakage or joint misalignment in the existing pipeline, then reinforcing the defective area with steel rings, and injecting materials into the steel rings to fill the completely sealed and reinforced defect areas.

5. Glass Fiber Steam Curing Tube Inner Liner Technology - Construction Process

The glass fiber steam curing liner technology involves installing prefabricated hose heads on-site, using the power of the traction winch to pull the hose heads into the existing pipeline, connecting the hose heads with the steam curing vehicle's exhaust port using a dedicated steam pipe, and operating the steam curing vehicle for the curing process. After the curing operation is completed, for the non-invasive pipeline repair, the excess liner should be removed and the pipeline ports should be handled.

Pipeline cleaning and inspection → Inner lining of hose and pipeline → Steam curing of inner lining hose → Removal of excess inner lining hose from the pipeline inner lining → Port treatment.

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CIPP Inverted Pipe Liner Technology - Construction Process

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