目前，市場上有多種示蹤線。哪種示蹤線較好，更有利于對埋地天然氣管道的長期跟蹤定位管理。需要測試示蹤線的性能以選擇更合適的示蹤劑。金屬絲。

At present, there are many kinds of trace lines on the market. Which kind of tracing line is better, which is more conducive to the long-term tracking and positioning management of buried natural gas pipelines. It is necessary to test the performance of the tracer line to select a more suitable tracer. Wire.

銅包鋼是由鋼芯線和緊緊包裹在其周圍的銅層組成的金屬芯。外側(cè)為PE防腐層。銅起傳導(dǎo)微弱電信號的作用，鋼絲起支撐作用。

Copper clad steel is a metal core composed of steel core wire and copper layer tightly wrapped around it. The outer side is PE anticorrosive coating. Copper plays the role of conducting weak electrical signals, and steel wire plays the role of support.

銅芯線一般由內(nèi)層銅芯線、中間層絕緣護(hù)套和外層保護(hù)套組成。銅包鋁由鋁芯線和將其緊緊包裹形成金屬芯的銅層組成，外層為PE防腐層。

Copper core wire is generally composed of inner copper core wire, intermediate insulating sheath and outer protective sheath. Copper clad aluminum is composed of aluminum core wire and copper layer tightly wrapped to form metal core, and the outer layer is PE anticorrosive coating.

由于鋼制燃?xì)夤艿劳鈱臃栏瘜訛樗芰蠈踊蚓哂薪^緣防腐性能的涂層，其結(jié)構(gòu)類似于銅包鋼、銅芯線、銅包鋁和其他外層，它們也是具有絕緣和防腐性能的塑料層。因此，我們采用兩個(gè)等效物，采用PCM管道電流衰減率法來測試示蹤線防腐層的平均絕緣質(zhì)量。

As the outer anti-corrosion layer of steel gas pipeline is plastic layer or coating with insulation and anti-corrosion performance, its structure is similar to copper-clad steel, copper core wire, copper-clad aluminum and other outer layers, which are also plastic layers with insulation and anti-corrosion performance. Therefore, we use two equivalents and PCM pipeline current decay rate method to test the average insulation quality of the anti-corrosion coating of the tracer line.

燃?xì)馐聚櫨€廠家認(rèn)為檢測原理是向示蹤劑施加一定頻率的電流信號，電流從示蹤劑傳到遠(yuǎn)處會逐漸衰減。其衰減與示蹤劑塑料層的絕緣電阻率有關(guān)。示蹤劑塑料層的平均絕緣電阻率越高，電流衰減越慢，反之亦然。

The manufacturer of gas tracing line believes that the detection principle is to apply a certain frequency of current signal to the tracer, and the current will gradually decay when it is transmitted from the tracer to a distance. Its attenuation is related to the insulation resistivity of the tracer plastic layer. The higher the average insulation resistivity of the tracer plastic layer, the slower the current attenuation, and vice versa.

銅包鋼、銅芯線、銅包鋁三根示蹤線埋設(shè)在同一條PE燃?xì)夤艿郎戏?。PE管道總長約717m，然后測試了三根示蹤線的導(dǎo)電性和防腐性。和強(qiáng)度，然后進(jìn)行數(shù)據(jù)分析，以對示蹤劑進(jìn)行評估。

Copper clad steel, copper core wire and copper clad aluminum are buried above the same PE gas pipeline. The total length of PE pipe is about 717m, and then the conductivity and corrosion resistance of three tracer wires are tested. And intensity, and then conduct data analysis to comprehensively evaluate the tracer.

銅包鋼示蹤線在強(qiáng)度方面優(yōu)勢明顯。在傳導(dǎo)探測信號時(shí)也能滿足探測和示蹤的需要，施工也更加方便。如果能做好接頭的防腐處理，示蹤線是劃算的。

Copper clad steel tracer wire has obvious advantages in strength. It can also meet the needs of detection and tracing when conducting detection signals, and the construction is more convenient. If the anti-corrosion treatment of the joint can be done well, the tracer line is cost-effective.

銅芯線示蹤線對檢測信號的傳導(dǎo)性優(yōu)良，但接頭部位的防腐方法比較簡單，接頭部位的防腐質(zhì)量不能保證，強(qiáng)度稍差。因此，銅芯線不宜用作地埋燃?xì)夤艿赖氖聚櫨€。

The copper core trace line has excellent conductivity to the detection signal, but the anti-corrosion method of the joint is relatively simple, the anti-corrosion quality of the joint can not be guaranteed, and the strength is slightly poor. Therefore, copper core wire should not be used as a tracer wire for buried gas pipelines.

銅包鋁示蹤線在強(qiáng)度和信號傳導(dǎo)方面沒有優(yōu)勢。如果接頭防腐處理不好，1-2a內(nèi)就會完全腐蝕斷裂。因此，不適用于埋地燃?xì)夤艿赖氖聚檮?/div>