heat exchanger is generally made of carbon steel , stainless steel and copper. The connection between the plates and the tubes is generally welding, expansion joint and expansion welding combination. Due to the shape of the weld, there are varying degrees of defects. , such as dents, pores, slag inclusions, etc., the distribution of weld stress is also uneven, which causes the material of the weld to change during welding. When encountering corrosive media, the weld position is easily corroded and rusted, causing the weld position to change. A leak occurs. Secondly, the chloride ions in the water and electrochemical corrosion problems can also easily cause corrosion at the weld position and lead to leakage, affecting the service life of the heat exchanger and causing losses to the production company.
The traditional method is to mark the leaking point and then repair it by repair welding. However, repair welding and will cause changes in welding stress and material, which can easily cause secondary leakage of the tube sheet. If the corrosion resistance of the equipment is improved by upgrading the material of the equipment itself, it will increase a lot of costs for the enterprise.
uses polymer materials for repair, which is easy to construct, low cost, high safety, and has excellent corrosion resistance and good pressure-resistant bonding properties. Corroded equipment can be repaired on site and corrosion-resistant coatings can be added , to avoid secondary corrosion and leakage.
polymer composite material repair technology can also use the operating environment of the equipment to customize targeted repair plans based on the comprehensive performance of the corresponding composite materials, and implement the repair steps rigorously and scientifically, changing the user's traditional repair methods and realizing Repairs were completed on-site within a short period of time to ensure the normal operation of the equipment.
