How to choose the internal electric heating wire of the heating tube, and how to consider the price cost, usage temperature, and usage frequency?
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How to choose the internal electric heating wire of the heating tube, and how to consider the price cost, usage temperature, and usage frequency?
Heating pipes are mainly composed of external metal pipes, high-temperature magnesium oxide powder, and internal electric heating wires. The production of heating pipes first selects the appropriate electric heating wire diameter according to the required voltage and power, and then processes it into a uniform and fine spiral shape on a wire winding machine. Secondly, the metal pipes are shrunk and quenched according to actual needs, and finally, the heating wires are evenly distributed inside the pipes, Then, a powder filling machine is used to fill the gap between the electric heating wire and the inner wall of the metal tube with dense high-temperature magnesium oxide powder, and the outlet end of the tube is sealed and insulated. The three main components of a heating tube are all indispensable and complement each other. The external metal pipes mainly serve as containers, protecting the internal structure and heat transfer; High temperature magnesium powder mainly plays a role in thermal conductivity and insulation, so there is no conductivity between the electric heating wire and the metal pipe, which can be used safely; The electric heating wire is the core of the heating tube, mainly playing the role of electrification and heating, and is the source of heat for the heating tube.
Due to the different environments used, the electric heating wires inside the heating tube are also different in production, mainly including iron chromium aluminum wire and nickel chromium wire.
Iron chromium aluminum electric heating wire: with good oxidation resistance, high electrical resistivity, low high-temperature strength, easy deformation and bending at high temperatures, high surface load, and low price.
Nickel chromium electric heating wire: has good plasticity, strong corrosion resistance, is not easily deformed after long-term high-temperature use, has a long service life, and is relatively expensive.
How should customers choose the internal electric heating wire of the heating tube, and how should they consider the price cost, usage temperature, and usage frequency?
Price cost: In terms of price cost, nickel chromium is generally several times more expensive than iron chromium aluminum, so consider the actual needs and choose a suitable electric heating wire.
Usage temperature: In terms of usage temperature, iron chromium aluminum has a higher temperature. However, in long-term high-temperature environments, iron chromium aluminum is more prone to deformation and bending than nickel chromium, which can affect its service life. Therefore, it is generally recommended to use nickel chromium electric heating wires in high-temperature environments, which have a long service life and are not easily deformed.
Usage frequency: Nickel chromium electric heating wire has better stability and plasticity than iron chromium aluminum electric heating wire. Therefore, in long-term and high load usage environments, the use of nickel chromium electric heating wire will ensure its lifespan and use.
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