Q: Why is chloride ion concentration a priority check item in the selection of the BXS-45 brazed stainless steel heat exchanger?
The plates and brazing layer of a brazed stainless steel heat exchanger are in long-term contact with the medium, and chloride ions are a sensitive factor that induces pitting corrosion and stress corrosion. During selection, actual chloride ion concentration data in the medium should first be obtained, and then the corrosion risk should be judged in combination with the operating temperature. If the chloride ion concentration approaches or exceeds the applicable boundary of the material, consideration should be given to adjusting the material or selecting another structural type. Even under the same working conditions, an increase in temperature will aggravate the destruction of the passivation film of stainless steel by chloride ions, so concentration and temperature need to be checked simultaneously.
Q: What details are easily overlooked in installation and maintenance?
During installation, it is recommended to reserve maintenance space of no less than 300 mm to facilitate subsequent disassembly, inspection, and cleaning. A Y-type strainer is recommended on the water side, and the filtration accuracy on the oil side should be no less than 100 μm to reduce the deposition of particulate matter in the inter-plate flow channels. Insufficient filtration accuracy may cause local blockage and affect heat exchange efficiency and pressure drop stability. For continuously operating systems, maintenance space and filtration configuration should be confirmed together during the piping layout stage to avoid difficulty in modification after commissioning.
Q: How do temperature and pressure parameters correspond to site conditions?
The BXS-45 is suitable for a temperature range of -40°C to 200°C and a design pressure of 3.0 MPa. During selection, the maximum possible operating temperature and maximum operating pressure at the site must be checked simultaneously against this range; if either item exceeds the range, a separate selection is required. Attention should also be paid to the coupled effect of temperature and pressure, and a reasonable margin should be reserved when operating near boundary parameters.
Q: What data should the technical engineer prepare during the data submission stage?
It is recommended to organize the medium composition (with emphasis on chloride ion concentration), operating temperature and pressure, flow rate, allowable pressure drop, filtration configuration, and installation space dimensions. The above data constitute the basis for selection verification, and missing items should be completed before inquiry to reduce repeated proposals.
