LASER WELDED FINNED TUBES

Laser welded finned tubes   1)        Aluminum gas boiler laser welded heat exchanger Laser Welded Finned Tubes heat exchange for solar Water Heating 2)        Stainless steel finned tubes laser welded cooling Delivery of laser-welded finned tubes fin tube 3)        Laser welding finned tube made of Stainless Steel 304 316 4)        Laser Welding Finned Tube 5)        Copper Laser Welded Finned Tubes 6)        Laser Welding Fin Tube Making Machine Finned Tube Steam Heating Coil Aluminium Tube Extended FinTube 7)        Stainless Steel Finned Tubes Laser Welded Cooling Delivery Of Laser-welded Finned Tubes Fin Tube 8)        China Factory SUS304 Stainless Steel Laser Welding Heat Exchanger Fin Tube factory 9)        ASTM A269 Stainless U Bend Boiler Heat Exchanger Steel Tube   A.     Laser welded finned tubes advantages Prevent crevice corrosion, with long service life. Easy to clean, suitable for food and pharmaceutical industries. The ideal heat transfer area is small, reducing the investment cost. Match with the process to reduce use and maintenance costs, reduce costs, and reduce investment costs. The fin part can be bent for quick and convenient processing to reduce deformation. The tubes are hardly affected by the welding process. The small diameter manufacturing becomes possible to reduce the weight and space of the heat exchanger and reduce the unsafe factors in the manufacturing process. B.     Laser welded finned tubes Application Laser welded finned tubes compared with other types finned tubes, the development and research has greatly saved material costs and achieved high penetration rate, which can prevent gap corrosion, prolong service life and reduce heat transfer resistance. Now it has been applied in various fields such as boilers, chemical industry, ships, waste heat power generation and home decoration. In the boiler industry, the surface has a larger heat exchange area, is environmentally friendly, energy-saving and efficient, and meets the emission requirements. The advantages of integral finned tubes are given full play. C.     Laser welded finned tubes characteristics ü   The thickness of base tube can be 0.8-1.5 mm, and the thickness of fin can be 0.3-1 mm, which greatly saves the material cost compared with other processes. ü   High penetration rate, which can prevent gap corrosion, prolong service life and reduce heat transfer resistance. ü   100% welded, no filler material. ü   Use gas protection, and the welding shall be free of defects such as air hole and sand hole. ü   Breaking through the material limit, different materials can be used for processing. ü   Easy for secondary processing, can directly coil and bend pipes. Small welding heat affected zone and small metallographic change make it possible to process small diameter finned tubes. D.     Laser welded finned tubes Parameter l   Basic dimensions: lBase Tube Diameter: 10mm-50mm lBase tube wall thickness: 1mm-8mm lFin Thickness: 0.4mm-0.8mm lFin Pitch: 2mm-20mm lFin Height: 5mm-19mm l l   Fin material: lCarbon steel, Titanium tube, Stainless steel etc. l E.      The heat transfer principle of laser welding stainless steel finned tubes E.What is the heat transfer principle of finned tubes? E.If you want to know the heat transfer principle of finned tubes, need to know what the heat transfer coefficient is. The heat transfer coefficient is the heat transfer quantity per unit and heat transfer area, which can reflect the heat transfer capacity between the fluid and the wall. E.Finned tubes are heat exchangers composed of round tubes or smooth tubes. How can we improve the heat transfer of round tubes? One of the effective methods is to use an extended surface on the outer surface of the tube to make a finned tube. It is assumed that the actual heat transfer area of the finned tube is several times of the original surface area of the bare tube. Although the heat transfer coefficient of the flue gas is still very low, the heat transfer effect reflected in the surface area of the bare tube will be greatly increased, so that the entire heat transfer process will be enhanced. When the total heat transfer is appropriate, the metal consumption of the equipment will be reduced, and the economy will be improved. E.Finned Tubes Application Examples: E.1. Heat pipe air preheater series. E.Application: Absorb waste heat from flue gas and heat combustion supporting air to reduce fuel consumption and improve combustion conditions, so as to achieve the purpose of energy conservation; It can also absorb waste heat from flue gas for heating other gas media such as gas. E.2. Heat pipe economizer series. E.Application: Heat is absorbed from flue gas to heat water supply. The heated water can be returned to the boiler (as an economizer) or used alone (as a water heater), so as to improve energy utilization and achieve the purpose of energy conservation. E.3. Heat pipe waste heat boiler (evaporator) series. E.Application: Heat pipes are used as heat transfer elements to absorb the waste heat of flue gas with higher temperature to generate steam. The steam generated can be combined into the steam pipe network (to achieve the pipe network pressure), and can also be used for power generation (large steam volume and stable heat source) or other purposes.   F.      Laser welded composite finned tube Application F.Laser welded composite finned tube is an efficient heat transfer element. Its heat transfer area is several to dozens of times than the bare tube, which can enhance heat transfer, reduce flow resistance, and reduce metal consumption, thus improving the economy and operation reliability of the heat exchange equipment. At present, laser welded composite finned tubes have been widely used in chemical industry, electric power, metallurgy, petrochemical, boiler, building materials, light textile, environmental protection, drying, medicine and other fields. F.Advantages of laser welding composite finned tubes: 1)      The installation is simple and economical. The length of laser welded composite fin tube can reach 12 meters, reducing the connection points, making the installation more economical and fast, and reducing the probability of water leakage at the connection. 2)      The maintenance is simple. After installed of laser welded composite finned tube, the maintenance is basically unnecessary. 3)      High efficiency. The laser welded composite finned tube is the full contact welding between the fin and the steel pipe. The heat dissipation area is more than 8 times that of the smooth tube. The interior is more smooth and the internal water flow resistance is small. 4)      It has a long service life, high mechanical strength between the fins and pipes, and the tensile strength can reach 600Mpa. The inside and outside of the pipes are all hot-dip galvanized. Material fins: carbon steel, corrosion-resistant steel, stainless steel, alloy steel. Type of fins: solid teeth, open teeth. 4) Laser welded composite finned tube Application   The greater temperature difference required for laser welded finned tubes to transfer heat, the greater its thermal resistance will become. Its thermal resistance is equal to the reciprocal of the heat transfer coefficient, indicating the greater heat transfer coefficient, the smaller its thermal resistance will be. On the contrary, the smaller heat transfer coefficient, the greater its thermal resistance will be.   The heat transfer coefficient on the air side is less than that on the water side, so the thermal resistance on the air side is greater than the water side, which becomes the main thermal resistance affecting heat transfer, making the air side bottleneck of the heat transfer process and limiting the improvement of heat transfer.   In order to reduce the thermal resistance on the air side and overcome the bottleneck effect on the air side, laser welded finned tubes may take a variety of measures in the design of heat exchangers. The choice is to add fins on the outer surface of the air side, that is to use finned tubes.   The finned tube has greatly expanded the original heat transfer area at the air side. The manufacturer of stainless steel laser welded finned tube has made up for the low heat transfer coefficient at the air side and greatly improved the heat transfer.