1. The most basic pipe connection:
A common problem: the amount of misalignment of the welded pipe mouth is at least 10℅.
Preventive measures: adjust the mouth several times, visually check that there is no obvious wrong edge outside the circle, and touch the wrong edge with your hand.
2. The nozzle milling process:
A common problem is that the milling end faces are not uniform, and there are convex and concave phenomena.
Preventive measures: when continuous uninterrupted pe tube shavings are produced during milling, observe whether there are obvious concavities and convexities on the milling end surface, and re-mill if necessary. Close the end faces of the two pipes and check whether the amount of misalignment of the two pipe ends is within the allowable range.
3. Welding pressure, heating and heat absorption:
Common problems, especially manual welding machines, the pressure is not easy to control, the pressure during the welding process is too large or too small, the heating time is too long or too short will cause the flanging amount to be too large or too small to form false welding.
Preventive measures: calculate the pressure, temperature and heat absorption time of the welded pipes before construction. Generally, the welding pressure is the drag pressure plus the specified pressure.
