由于PE管不導電，不帶磁性，無法對PE管進行跟蹤，給以后的管道維護帶來不便。氣體示蹤線有效了非金屬管道不能用金屬管道探測器探測的問題。那么鋪設示蹤線有哪些注意事項呢？

Because the PE pipe is non-conductive and non-magnetic, it is impossible to track the PE pipe, which brings inconvenience to the future pipeline maintenance. The gas tracing line effectively solves the problem that non-metallic pipelines cannot be detected by metal pipeline detectors. So what are the precautions for laying the trace line?

1、走線埋設時，應緊靠PE管成一條直線，好位于管頂面。不要以螺旋狀埋在PE管上，容易導致檢測結果不準確。

1. When laying, it shall be in a straight line close to the PE pipe and be located on the top surface of the pipe. Do not bury the PE pipe in spiral shape, which may lead to inaccurate test results.

2、人孔處或地外的示蹤線應預留一定長度的導線（1m以上為宜），用于信號的檢測和應用。這可以提高檢測效率和準確性。

2. A certain length of conductor (more than 1m) shall be reserved for the tracer line at the manhole or outside the ground for signal detection and application. This can improve the detection efficiency and accuracy.

3、示蹤線接頭或分支點必須連接牢固，保持良好的導電性，并用絕緣膠帶包裹，以防地下潮濕造成腐蝕和斷線，中斷檢測信號。管道鋼塑轉換接頭處的示蹤線可焊接在法蘭上，接頭處應進行防腐處理，以防長時間腐蝕而斷開。

3. The tracer line joint or branch point must be firmly connected to maintain good conductivity and wrapped with insulating tape to prevent corrosion and disconnection caused by underground moisture and interrupt the detection signal. The tracer 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 disconnection due to long-term corrosion.

4、為了增加示蹤線的信號強度，使信號分布均勻，施工時必須盡量減小示蹤線埋地端的接地電阻，并做好剝去外皮的接地措施。外露芯線的絕緣層應取30cm。尤其是長度較短的支管末端，一定要做好接地，否則支管上的信號會很微弱，檢測不到。

4. In order to increase the signal strength of the tracer line and make the signal distribution uniform, the grounding resistance at the buried end of the tracer line must be reduced as much as possible during construction, and the grounding measures of peeling off the skin shall be taken. The insulation layer of exposed core wire shall be 30cm. In particular, the end of the branch pipe with short length must be well grounded, otherwise the signal on the branch pipe will be very weak and can not be detected.

5、如果管道埋設長度超過1km，且中間沒有人孔等設施預留示蹤頭以滿足檢測需要，建議每設置一個試驗樁，預留示蹤劑聯合檢測。

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

6、非開挖工程施工中，PE管道外的示蹤線在拖管過程中容易被扯斷。簡單的方法是選擇截面積更大、強度更高的鋼絲或鋼絲繩，或者在管道內部使用。預穿示蹤線可以避免斷線，檢測效果和外面一樣，但是這樣做的時候需要處理好內示蹤線和外示蹤線的連接。

6. During the construction of trenchless engineering, the tracer line outside the PE pipe is easy to be broken during the pipe dragging process. The simple method is to select steel wire or wire rope with larger cross-sectional area and higher strength, or use it inside the pipeline. Pre threading the tracer line can avoid disconnection, and the detection effect is the same as that of the outside, but the connection between the inner tracer line and the outer tracer line needs to be handled well.

7、在某些特殊情況下，燃氣示蹤線不能應用于PE管道。這時可以采用預埋示蹤球的方法來滿足未來檢測定位的需要。

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

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