1, the power setting of the heating tube is too high, the surface load is too large, and the internal temperature is too high, which causes the internal expansion of electric heating tube, resulting in the burning or cracking of the outer tube.

2. Improper use of magnesium oxide powder. Using inferior magnesium oxide powder, the internal expansion and explosion of stainless steel heating tube will occur when it works.

3. The material of the outer tube of the heating tube, the wall thickness of the tube body is too thin or there is a seam tube body, which causes the outer tube of the heating tube to burn or crack.

4. Scaling on the outer tube of the heating pipe. The heating water for heating pipes is mostly groundwater or tap water, which has many impurities and is easy to scale. Too much and too thick scale will cause the internal temperature of electric heating tube not to spread, which will lead to the cracking of the outer tube of the heating pipe.

5, the voltage reason. When multiple heating pipes are used together, there will be problems in wiring and power superposition, which will become the root cause of the burning or cracking of the outer pipe of the heating pipe mentioned in the first point.

6. Failure to cooperate with temperature control or failure to start the monitoring function of temperature control causes the heating tube to be energized all the time, and the heating wire in the tube keeps heating, and the temperature continues to rise until the heating tube is burned out and power is cut off.