之前的PE管不導電，不導磁，沒辦法對管道進行追蹤，對于日常維修非常麻煩，而燃氣示蹤線了非金屬管線不能使用金屬管線尋管儀探查的問題。那么來講講燃氣示蹤線發展、作用及鋪設注意事項吧。

The previous PE pipe was non-conductive and non-magnetic, so it was impossible to track the pipe, which was very troublesome for daily maintenance, and the gas tracing line solved the problem that non-metallic pipelines could not be detected by metal pipeline finder. Let's talk about the development, function and laying precautions of gas tracing line.

示蹤線的發展

Development of trace line

1、一代示蹤線：是由鋁箔和塑料薄膜的母體組成，鋁箔主要是傳輸信號，母體是固定鋁箔。這種示蹤線缺點：鋁箔強度非常低，即使在生產，運輸過程中也很容易斷裂，輔設易損傷，同時鋁箔的電阻非常大，有效探測距離和深度有限。

1. First generation tracing line: it is composed of aluminum foil and plastic film. Aluminum foil is mainly used to transmit signals, and the matrix is fixed aluminum foil. Disadvantages of this tracer line: the strength of aluminum foil is very low, which is easy to break even in the process of production and transportation, and the auxiliary equipment is easy to be damaged. At the same time, the resistance of aluminum foil is very large, and the effective detection distance and depth are limited.

2、二代示蹤線：是由鋼絲和塑料薄膜壓制而成，該示蹤線由鋼絲為導體，電阻大，探測距離有限，難以滿足實際需要。

2. Second generation trace line: it is pressed by steel wire and plastic film. The trace line is made of steel wire as the conductor, with high resistance and limited detection distance, which is difficult to meet the actual needs.

3、三代示蹤線：是由銅包鋼金屬線芯和PE外保護層組成，外觀成線狀。

3. Third generation tracer wire: it is composed of copper-clad steel metal wire core and PE outer protective layer, and its appearance is linear.

示蹤線的作用

Function of tracer line

“示蹤線”用于對PE管道的探測、追蹤及定位。“示蹤線”同PE管一起鋪設;一般會采用金屬線芯，通過探測設備給“金屬線”施加信號，由探測接收機接收信號，從而找到示蹤線的準確位置，即同步追蹤到PE燃氣管道的具體位置;以便于對PE管道進行改造及維修。

"Tracer line" is used for the detection, tracking and positioning of PE pipes. "Tracer line" is 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, so as to find the accurate position of the tracer line, that is, synchronously track to the specific position of the PE gas pipeline; In order to facilitate the transformation and maintenance of PE pipes.

示蹤線鋪設注意事項

Precautions for laying tracer line

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. When embedding the trace, it should be close to the PE pipe in a straight line and located on the top of the pipe. Do not spiral wrap it on the PE pipe for embedding, which will easily 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) should be reserved for the tracer line at the inspection well or the place where it goes out, for the detection of applied signals. 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 tracer wire joint or branch point must be firmly connected, maintained in good conductivity, and wrapped with insulating tape to prevent corrosion and disconnection caused by underground humidity, so as to interrupt the detection signal. The tracer wire 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 disconnection in the future.

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 line and make the signal distribution uniform, the grounding resistance of the buried end of the tracer line must be minimized during construction, and good grounding measures of stripping the insulation layer and exposing the core wire for 30cm shall be taken. Especially for the end of the branch pipe with short length, it must be well grounded, otherwise the signal on the branch will be very weak and cannot be detected.

5、若管道埋地長度超過1km，中間又沒有窨井等設施供預留示蹤線頭滿足探測之需，則建議每處設一個測試樁并預留示蹤線接頭供探測時使用。

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

6、在非開挖工程施工中，PE管道外面的示蹤線在拖管過程中容易被扯斷，簡便的辦法是選擇截面積更大、強度更高的導線或鋼絲繩，或者在管道的內部預穿一條示蹤線即可避免斷線，其探測效果如同在外面一樣，但這樣做時需處理好內部示蹤線頭與外面示蹤線連接的問題。

6. In the construction of trenchless engineering, the tracer line outside the PE pipe is easy to be broken during the dragging process. A simple way is to choose a conductor or steel wire rope with larger cross-sectional area and higher strength, or pre thread a tracer line inside the pipe to avoid the breakage. Its detection effect is the same as that outside, but when doing so, it is necessary to deal with the connection between the internal tracer line head and the external tracer line.

7、在某些特殊情況下，對PE管道無法應用示蹤線，這時可采用預埋示蹤球的方法滿足今后的探測定位需要。

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

以上就是今天為大家介紹的關于問題以及注意事項的全部內容，希望對大家能有所幫助，想要了解更多內容可以電話聯系我們或者關注我們的網站http://www.gcshome.cn，我們的工作人員會及時與您取得聯系。

The above is all about the problems and precautions introduced to you today. I hope it can help you. If you want to know more, you can contact us by phone or follow our website http://www.gcshome.cn , our staff will contact you in time.