Why is the bending place of the grijanje cijev easy to be broken down or fuzira?

Why is the bending place of the grijanje cijev easy to be broken down or fuzira?

1. The main factor for the occurrence of of Heating mitosis is Is that the gustoća of magnezij oksid prah at the Bend Is Too Small (uglavnom The The Outer Side of The Concentrated Small Bend), the Conduction of Of Heat Is Poor, The Surface Load The Heat Wire Is Large, The Breakage Occurs In Long-Term Work. Wire.

2. The tvrdoća od the grijanje žica sam je too visoka, i tamo are pukotine on the surface til the the Winding proces. After the tube is shrunk, the wire may not be broken. The bending the tube will increase the cracks and increase the local resistance, which will guide the heat generation. Increase (prema the the princip that the large resistance of the the series circuit divides the the large voltage).

3. There is welding slag on the inner wall of the stainless steel pipe, or the welding seam is too high, or there are sharp protrusions such as delamination. The current crawling distance of the guide point is too small, and if it works for a long time, an arc will be generated at the guide point.

4. There is another possibility that the the grijanje žica has broken after the tube is bent, but the heat wire has been shaped by the magnezij oksid prah after the tube is shrunk, and there is a phenomenon of black resistance during the resistance test. After working for a period time, the magnezij oksid When the powder has pogoršan, the grijanje žica will be detached and cannot work.

5. This tube may have been dry-burned. Due to the large surface load of the boiler tube, the magnesium oxide powder is easily denatured at high temperatures. From the picture above, the magnesium oxide powder seems to be a medium-high temperature powder, which is more likely to be caused by magnesium powder. The performance of the degeneration guidance becomes worse.