What is the impact of scale on water tank electric heating tubes?

When ordering custom water tank heaters, you must provide basic parameters such as voltage, total wattage, and length limits. We can design a suitable water tank heater based on these parameters.

However, when determining the wattage and material of a single heater, we also ask customers a crucial question: what is the scale buildup in the water in their area? This can be determined by looking at the scale buildup inside a kettle. You're probably wondering how scale buildup relates to the wattage and material of the water tank heater. Today, we'll explain how scale affects water tank heaters.

Scale is calcium carbonate, and its acids can corrode metals. Whenever water is heated, scale forms, making it the natural enemy of water tank heaters. When scale accumulates on the surface of a water tank heater for a long time, it corrodes the heater's outer casing, creating tiny holes. This allows water to enter the heater, dampening the magnesium oxide powder and weakening its insulation, leading to breakdown. This can render the heater unusable. On the other hand, when scale forms on the surface of a water tank heater, it hinders heat conduction. This prevents the heater from transferring heat quickly enough, causing the surface temperature to rise, inevitably leading to a corresponding increase in the internal temperature. When the internal temperature reaches a certain level, it can burn out the resistor wire or even cause a tube burst, ultimately ending the heater's lifespan.

As explained above, scale can corrode heaters and hinder heat conduction. Therefore, before ordering custom heaters, consider the scale content and decide whether to choose standard 304, corrosion-resistant 316, or a scale-resistant coating.

Scale also determines the heater's power per meter design. The greater the power per meter, the greater the surface load. This increased surface load accelerates scale formation. Therefore, to minimize scale formation, the power per meter should be reduced, which in turn increases the heater's cost. Therefore, the amount of scale not only affects the heater's lifespan but also its unit cost.