Local resin curing and repair

The local resin agglomeration method, also known as the felt tube air pressure local forming method, involves applying a resin mixture to glass fiber felt and compressing it with air pressure against the inner wall of a pipe. This is achieved through methods like room temperature curing, heating, or ultraviolet radiation, forming a new inner lining pipe inside the repaired section without excavation.

Process Flow

Construction Materials

The materials for the local resin curing method primarily consist of felt tubes, resin, and hardener. Felt tubes are made of one or more layers of flexible non-woven fabric or equivalent fabric. The material of the felt tube should be compatible with the selected resin to ensure the permeability of the resin and should have sufficient tensile and curving properties to withstand installation pressure. The resin can cure at room temperature within a certain period. Depending on the condition of the pipeline to be repaired, a mixture of a certain proportion and quantity of resin and hardener is prepared, and mixed evenly using a stirring device to ensure the mixture is uniform and free of bubbles.

Process Features:

The entire inner lining repair process requires no personnel entry into the pipeline! Safe and reliable! No excavation needed, short repair construction time. From resin mixing to the completion of the glass fiber lining repair, it takes 1-2 hours at room temperature for quick curing. It can be operated with water, withstands high temperatures and acids and alkalis, and is waterproof and non-shrinking.

Repair range from DN50 to DN1200, repair length 0.5-5m (depending on the repair bladder length) After resin curing, superior performance, high strength, and can maintain a lifespan of 50 years.

Fast testing speed, segmented testing capability, minimally affects normal drainage pipeline operation.

Construction Case Studies: