LL Type Spiral Wound Finned Tube

Spiral finned tubes can be manufactured in a variety of ways, and the finned tubes used in heat exchange equipment such as boilers and pressure vessels mainly have the following manufacturing methods:
High frequency resistance welding spiral finned tube
High-frequency resistance 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 joint and the adjacent area to make the welding contact surface reach the plasticity of melting or semi-melting state, and then apply appropriate pressure to the welding contact surface to complete the welding work of the finned tube.
Brazed Spiral Finned Tubes
Brazing spiral finned tube is filled with a kind of solder with a melting point lower than that of the welded parts between the welded parts, and then heated to the brazing temperature. When the welded parts do not melt, the solder melts and wets the brazing However, the brazed joint is formed by the diffusion of the contact of the welded parts, so as to complete the welding of the spiral finned tube.
Integral spiral finned tube
Integral spiral finned tube is an integral spiral finned tube formed at one time by using a thick-walled tube (blank tube) under the condition of medium frequency continuous heating, making the tube flattened and bound.

 

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