Due to the non conductivity and non magnetism of the PE pipe, it is impossible to track the PE pipe, which brings inconvenience to future pipeline maintenance. Therefore, tracer lines also appear. The commonly used tracing wires in the current market include copper clad steel tracing wires, thin film steel wire pressed tracing wires, and wire tracing wires.

一、示蹤線的作用

1、 The role of tracer lines

“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。

The "tracer line" is laid together with the PE pipe; Generally, metal wire cores are used to apply signals to the "metal wire" through detection equipment, and the detection receiver receives the signal to find the accurate position of the tracer line, that is, to synchronously track the specific position of the PE gas pipeline; To facilitate the renovation and maintenance of PE pipelines.

二、示蹤線的發展

2、 Development of Tracer Lines

示蹤線的發展經過四次改良：

The development of tracer lines has undergone four improvements:

1、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. Tracer line: It is composed of a matrix of aluminum foil and plastic film, with aluminum foil mainly used for signal transmission and the matrix being fixed aluminum foil. The disadvantage of this tracer line is that the strength of aluminum foil is very low, and even during production and transportation, it is easy to break, and the auxiliary equipment is easily damaged. At the same time, the resistance of aluminum foil is very high, and the effective detection distance and depth are limited.

2、第二代示蹤線：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. The second generation tracer line is made by pressing steel wire and plastic film. The tracer line is made of steel wire as the conductor, with high resistance and limited detection distance, making it difficult to meet practical needs.

3、第三代示蹤線：是由銅包鋼金屬線芯和pe外保護層組成，外觀成線狀。該示蹤線電阻高，伸長率差，難以滿足《埋地電纜》規范要求，探測距離僅為500米。

3. The third generation tracer wire is composed of a copper clad steel metal wire core and a PE outer protective layer, with a linear appearance. The tracer line has high resistance and poor elongation, making it difficult to meet the national standard requirements for buried cables. The detection distance is only 500 meters.

4、第四代pe復合銅包鋁合金線，是由銅芯線和銅包鋼線發展而來的新型線材，由銅包鋁合金和pe外保護層組成，外觀成線狀，既保留了銅芯線的低電阻，又保留了pe100的長壽性，可探測距離為單向750米！雙向1500米！以中山海訊的hx14-2為例！

4. The fourth generation PE composite copper clad aluminum alloy wire is a national patented new type of wire developed from copper core wire and copper clad steel wire. It is composed of copper clad aluminum alloy and PE outer protective layer, with a linear appearance, retaining both the low resistance of the copper core wire and the longevity of the PE100. The detection distance is 750 meters in one direction! 1500 meters in both directions! Taking the Hx14-2 of Zhongshan Haixun as an example!