Nickel-based brazed finned tube
Nickel-based brazing finned tube technology is a deep-processed nickel-based brazing process on the basis of high-frequency welding. It is a new type of finned tube welding process, which is passivated by acid and alkali, wound, and dusted. High temperature brazing, filling, sealing, vacuuming, repassivation, inspection, etc. More than ten steps, using nickel powder to melt at 950 ° C, it penetrates into the gap between the fin and the base pipe, and is welded together to form The alloy is connected, and the nickel powder also penetrates into the surface of the carbon steel to form a dense and smooth alloy protective layer with a thickness of about 0.5 mm on the surface of the finned tube, so that the ordinary carbon steel material has the performance of stainless steel.
Tin brazed copper finned tube: copper tube-copper sheet is welded firmly, the welding rate is 100%, no contact thermal resistance, large heat transfer, and the advantage of being able to be used for a long time under high temperature conditions.
Application: Mainly used for heat exchange components of vacuum furnace heat exchangers.
Copper tube copper plate phosphor bronze brazed finned tube, tube sheet welding rate of 100%, no contact thermal resistance, small fin wrinkles, uniform sheet spacing, working temperature greater than 600 ° C, can be at high tube wall temperature The advantage of long-term work is not loose.
Nickel-based brazed finned tubes Nickel-valent brazed brazing is an advanced welding process that joins the base pipe to the finned tube by melting the nickel-chromium alloy solder under high temperature and reducing atmosphere. The fins are brazed to the base pipe by more than ten steps of winding, dusting (nickel-chromium alloy powder), high-temperature sintering, and the like. Nickel-based brazed finned tubes are widely used in petroleum, chemical, natural gas, metallurgy, electric power, carbon industry and other fields.
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