Flange heating elements are generally divided into threaded flange and flat flange. Threaded flange sizes are commonly 1 inch, 1.2 inches, 1.5 inches, and 2 inches. Threaded flange tubes are generally suitable for low-power heating, with power typically ranging from a few kilowatts to tens of kilowatts. Flange sizes vary from DN10 to DN1200, and different powers are designed according to customer requirements. High-power flange heating elements usually use flat flanges, ranging from a few kilowatts to hundreds of kilowatts. The surface power is 2 to 4 times that of air heating surface load.
The reason flange heating elements are divided into liquid heating elements and dry-type heating elements is that their external load planning differs. Generally, the external load of liquid electric heating elements is much higher than that of dry-type electric heating elements. Since liquid electric heating elements heat in liquid, the heat on the surface of the heating element is easily absorbed by the liquid, so the external temperature of the heating element is not too high, thus the external load planning of liquid heating elements is higher. For immersion-type flange heating elements, because the working environment is away from air, and air itself has a negative effect of hindering heat conduction, the external load of dry-type electric heating tubes is lower. If dry burning occurs in liquid electric heating elements, the external temperature of the heating element cannot be dissipated immediately, causing the internal temperature to be too high, leading to burnout of the heating element, and in severe cases, tube rupture.
Flange heating element process: Most flange heating elements are manufactured by argon arc welding to connect the electric heating tube to the flange for centralized heating. Alternatively, a fastening device can be used, where each electric heating tube is welded with a fastener, and then locked with a nut on the flange cover. The tube and fastener are argon arc welded, ensuring no leakage. The sealing part of the fastener uses scientific technology.
Flange heating element usage precautions:
1. Do not use unstable containers. Before installing the heater, ensure the container is placed stably, then install and fix it. Unstable containers can easily tip over, spilling liquid and causing dry burning of the heating element, leading to fire, electric shock, and other dangers.
2. Do not arbitrarily modify or deform the heater. Random deformation or modification may change the internal structure of the heater, affecting electrical performance, and may cause fire, leakage, electric shock, and other dangers.
3. Do not install in air outlets with high humidity. Installing in high-humidity air outlets can easily cause the heating element to become damp, reducing insulation, which may lead to leakage, electric shock, and other dangers.
4. Do not use the flange heating element in containers lacking water or with sediment. Heating in liquids with many impurities can cause surface scaling, preventing timely heat dissipation and damaging the heating element. Also, ensure the heating liquid is not below the normal liquid level, otherwise it may damage the heating element or cause fire.
5. Do not place heavy objects on the power cord. If the power supply line is long, regularly check if the line is being crushed by heavy objects. If found, remove the objects immediately. Prolonged crushing and friction may damage the wire insulation, causing leakage, electric shock, or even fire.
