Spiral finned tubes can be manufactured in a variety of ways. The finned tubes used in boilers, pressure vessels and other heat exchange equipment mainly include the following manufacturing methods: high frequency resistance welding spiral finned tubes, brazing spiral finned tubes and Integral helical finned tube.
High frequency welded spiral finned tube
High-frequency welding spiral finned tube is to introduce high-power high-frequency current into the welded part, and use the resistance heat generated by the current to pass through the contact surface of the welded part and the adjacent area to make the welding contact surface reach melting or semi-melting plasticity. state, and then apply appropriate pressure to the welding contact surface to complete the welding of the finned tube.
High frequency welded spiral finned tube
Brazed Spiral Fin Tubes
The brazing spiral finned tube is filled with a kind of brazing material with a lower melting point than that of the welded part, and then heated to the brazing temperature. When the welded part does not melt, the brazing material melts and wets the brazing. However, the brazing joint is formed by the diffusion at the contact of the welded part, thereby completing the welding of the spiral finned tube.
Integral spiral finned tube
Integral helical finned tube is an integral helical finned tube which is formed at one time by extruding and rolling a thick-walled tube (blank tube) under the condition of continuous heating at intermediate frequency. It is the latest method of manufacturing finned tube. A domestic company has already applied for a patent for the integral helical finned drum and the self-made integral finned tube manufacturing equipment.
