Analysis Of The Causes Of Joints In Pre-insulated Bushings

There are several main reasons for the appearance of joints in pre insulated sleeve:
1.pre insulated junction sleeve The raw material blank tube itself has joints. The raw material manufacturers of fiberglass blank tubes are uneven. From what I have learned about the raw materials, 46% of the fiberglass blank tubes are defective, which leads to joints in insulated joint sleeve finished products;
2. During the painting process of the fiberglass blank tube, the semi-finished fiberglass tube will be defective, which requires the bad section of the casing to be cut, and a new joint will appear;
3. Inspection, the fiberglass tube inspection standard is defined differently by each manufacturer, which also leads to the inconsistency of the number of joints. For example, if the length of A is 100 meters and is inspected twice, it is necessary to cut a section every 50 meters for inspection, and the rest is connected, which also forms a joint;
4..Joints appear when fiberglass tube blanks are packaged. For a roll of 100 meters, the excess needs to be cut off and then connected to another fiberglass tube to make up 100 meters for packaging;
Analysis of the causes of joints in fiberglass tubes
How to avoid or reduce the occurrence of joints? Of course, it is to improve the quality of raw materials, improve process requirements and reduce the number of fiberglass tube inspections.