示蹤線鋪設注意事項

　　2、 Precautions for trace line laying

　　1、蹤線埋設時應緊貼PE管道呈直線狀，并位于管道的頂面為好。請勿以螺旋狀纏繞在PE管道上埋設，這樣易導致探測結果不準確。

　　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、在窨井或出地處示蹤線應該預留出一定長度的導線（1m以上為宜），供探測施加信號所用。這樣可提髙探測效率和精度。

　　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、示蹤線接頭或分支點一定要連接牢固，保持良好導電,并用絕緣膠布包好，防止地下潮濕而造成腐蝕斷線情況，使探測信號中斷。管道的鋼塑轉換接頭處示蹤線可以焊接在法蘭上，接點處做好防腐處理，防止日久后腐蝕斷線。

　　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、為增加示蹤線的信號強度并讓信號分布均勻，施工時須盡量減小示蹤線埋地末端的接地電阻，采取剝掉絕緣層裸露芯線30cm的良好接地措施。特別是對于長度較短的分支管的末端，一定要接地良好，否則分支上的信號會非常弱而探測不到。

　　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 30cm. 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.

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