Solution to Leakage of Stainless Steel Heat Exchange Tube Bundle
By: mxgy,
The appropriate solution for the leakage of stainless steel heat exchange tube bundles should be selected based on the leakage location, medium characteristics, and operating conditions. There is no distinction between emergency leak prevention and permanent repair of shutdown.
Emergency leak stop without stopping the machine (operated under pressure):
1. Fixture injection sealing (applicable for single tube leakage)
Customize arc-shaped fixtures to wrap around leakage points → inject high-temperature resistant sealant (such as polytetrafluoroethylene rubber rod) → solidify the gel to form a sealing layer. The pressure of the fixture should be ≥ 1.5 times the working pressure of the pipeline, and the temperature resistance range of the colloid should cover the temperature of the medium.
2. Magnetic sealing (applicable to magnetic material shells)
Press the rubber pad tightly with a strong magnet to cover the leakage point, suitable for working conditions ≤ 260 ℃.
Despite emergency leak prevention, permanent repairs must still be carried out within 48 hours!
Local tube bundle repair can be achieved through blockage, replacement, and composite material repair. The blocking method uses a conical metal plug and argon arc welding for sealing, with a sealing length of ≥ 20mm at both ends (suitable for ≤ 10% tube bundle leakage and no spare tubes); The pipe replacement method involves extracting the old pipe, expanding/welding the new pipe, and conducting a 1.25 times pressure test according to the GB/T 13296 standard (applicable to multiple pipes with leakage or severe corrosion); Composite material repair involves polishing the leak point, applying carbon nano polymer material, and wrapping fiber tape reinforcement (pressure resistance ≥ 16MPa) (suitable for weld cracks or sand holes ≤ 3mm).
Solution to Leakage of Stainless Steel Heat Exchange Tube Bundle
By: mxgy,
The appropriate solution for the leakage of stainless steel heat exchange tube bundles should be selected based on the leakage location, medium characteristics, and operating conditions. There is no distinction between emergency leak prevention and permanent repair of shutdown.
Emergency leak stop without stopping the machine (operated under pressure):
1. Fixture injection sealing (applicable for single tube leakage)
Customize arc-shaped fixtures to wrap around leakage points → inject high-temperature resistant sealant (such as polytetrafluoroethylene rubber rod) → solidify the gel to form a sealing layer. The pressure of the fixture should be ≥ 1.5 times the working pressure of the pipeline, and the temperature resistance range of the colloid should cover the temperature of the medium.
2. Magnetic sealing (applicable to magnetic material shells)
Press the rubber pad tightly with a strong magnet to cover the leakage point, suitable for working conditions ≤ 260 ℃.
Despite emergency leak prevention, permanent repairs must still be carried out within 48 hours!
Local tube bundle repair can be achieved through blockage, replacement, and composite material repair. The blocking method uses a conical metal plug and argon arc welding for sealing, with a sealing length of ≥ 20mm at both ends (suitable for ≤ 10% tube bundle leakage and no spare tubes); The pipe replacement method involves extracting the old pipe, expanding/welding the new pipe, and conducting a 1.25 times pressure test according to the GB/T 13296 standard (applicable to multiple pipes with leakage or severe corrosion); Composite material repair involves polishing the leak point, applying carbon nano polymer material, and wrapping fiber tape reinforcement (pressure resistance ≥ 16MPa) (suitable for weld cracks or sand holes ≤ 3mm).
