As PE pipe is non-conductive and non magnetic, it is impossible to track PE pipe, which brings inconvenience to pipeline maintenance in the future. The buried trace line effectively solves the problem that non-metallic pipelines cannot be detected by metal pipeline finder. The following section will talk about the role of the trace line and the precautions for laying.

1, The role of trace lines

"Tracer wire" is used for the detection, tracking and positioning of PE pipes. "Tracer wire" shall be laid together with PE pipe; Generally, metal wire cores are used to apply signals to the "metal wire" through the detection equipment, and the detection receiver receives the signals to find the exact location of the trace line, that is, to synchronously track the specific location of the PE buried pipeline; In order to facilitate the transformation and maintenance of PE pipes.

2, Precautions for trace line laying

1. The trace line shall be laid in a straight line close to the PE pipe and on the top of the pipe. Do not wrap the PE pipe in a spiral shape for burial, which may lead to inaccurate detection results.

2. A certain length of wire (more than 1m is appropriate) shall be reserved for the trace wire in the inspection well or out of the ground for signal detection. This can improve the detection efficiency and accuracy.

3. The connector or branch point of the tracer wire must be firmly connected to maintain good conductivity, and be wrapped with insulating tape to prevent corrosion and breakage caused by underground moisture, which may interrupt the detection signal. The trace line at the steel plastic conversion joint of the pipeline can be welded on the flange, and the joint shall be subject to anti-corrosion treatment to prevent corrosion and wire breakage after a long time.

4. In order to increase the signal strength of the tracer wire and make the signal distributed evenly, the grounding resistance at the buried end of the tracer wire must be reduced as much as possible during construction, and good grounding measures shall be taken to strip the insulation layer and bare core wire for 30 cm. Especially for the end of the branch pipe with short length, it must be well grounded, otherwise the signal on the branch pipe will be very weak and cannot be detected.

5. If the buried length of the pipeline exceeds 1 km and there is no inspection well or other facilities in the middle to reserve the tracer head to meet the needs of detection, it is recommended to set a test pile every kilometer and reserve the tracer joint for detection.

6. During the trenchless construction, the tracer wire outside the PE pipe is easy to be broken during the pipe dragging process. The simple method is to select a conductor or steel wire rope with larger sectional area and higher strength, or to pre thread a tracer wire inside the pipe to avoid breakage. Its detection effect is the same as that outside, but the connection between the internal tracer wire head and the external tracer wire needs to be handled properly when doing so.

7. In some special cases, the tracer wire cannot be applied to PE pipes. At this time, the method of embedding the tracer ball can be used to meet the needs of future detection and positioning.

This is the end of the function and laying precautions of the trace line. If you have any questions or needs that you do not understand, please come to our website http://webtest2.daoshangbao.cn Consult.