"HF WELDED HELICAL FINNED TUBES SEGMENT Industrial is proud to supply a wide range of high frequency helical high finned tubes - great for the petrochemical and power generation industry. A continuous helical fin is attached to the base of the tube by high frequency electric resistance welding. The helical fins produce a homogeneous, clean, continuous bond for efficient heat flow and resistance to corrosion. High frequency welded finned tubes features High frequency welded finned tube is a kind of efficient heat dissipation ves the shortcomings of other finned tube radiators. The finned tube itself is a strip steel with a thickness of 0.8-1mm wrapped around the finned tube. At the same time, high frequency welding process is used to weld the fins firmly on the tube, ensuring the bonding strength between the tube and fins. Its metal thermal strength has reached 1.10~1.20w/kg ¡æ, The finned tube is widely used in the manufacture of economizer of boiler, air preheater and energy-saving radiator of workshop and residence, and is the first choice for later winding of heat pipe. The spiral finned tube is a high efficient heat transfer transfer area is several 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, spiral finned tubes have been widely used in various boilers. High frequency welded Principle Finned tube is a steel strip wound on the outer circle of the seamless steel tube with a certain thread pitch (the steel strip is perpendicular to the surface of the outer circle of the steel tube). High frequency current is used as the welding heat source. The skin effect and electric heating effect of high frequency current are used to locally heat the surface between the steel tube and the steel strip and the area to be welded, so that the surface can reach a plastic weldable state. At the same time, an upset forging force is applied on the outside of the fin to make the metal oxide Extrusion of local melt and excess plastic metal makes the combination of solid atoms between steel pipe and fin material, thus realizing plastic welding of surface. We supply the helical finned tube in a wide range of sizes, including: Tube OD: 25.4 / 31.8 / 38.1 / 50.8 / 63.5 and 76.0 mm Pipe OD: 26.7 / 33.4 / 42.2 / 48.3 / 60.3 / 73.0 / 88.9 / 101.6 / 114.3 / 141.3 / 168.3 and 219.1 mm ? SERRATED FIN Fin Height: 0.5¨C1.5¡± (12.7¨C38.1mm) (higher on application) Fin Thickness: 0.036¨C0.05¡± (0.9¨C1.27mm) Fin Spacing: 1¨C7 per inch (39¨C276 per metre) Tube Outside Diameter: 0.75¨C8¡± (19.05¨C219.1mm) Segment Width: 5/32, 5/16¡± (4.5, 8.0mm) ? PLAIN FIN (SOLID FIN) Fin Height: 0.25¨C1.0¡± (6.4¨C25.4mm) (higher on application) Fin Thickness: 0.036¨C0.098¡± (0.9¨C2.5mm) Fin Spacing: 1¨C7 per inch (39¨C276 per metre) Tube Outside Diameter: 0.75¨C8¡± (19.05¨C219.1mm)"
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