为了更有利于对埋地天然气管道的长期跟踪定位管理，需要对示踪线的性能进行测试，以选择更合适的示踪线。因此，我们对燃气管道中常用的示踪线进行了测试，从示踪线电导率、示踪线接头防腐处理、示踪线强度等方面为天然气管道示踪线的选择提供参考。

In order to facilitate 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 appropriate tracer line. Therefore, we have tested the commonly used tracer lines in gas pipelines to provide reference for the selection of tracer lines in natural gas pipelines from the aspects of tracer line conductivity, anti-corrosion treatment of tracer line joints, and tracer line strength.

测试概述

Test overview

，将铜包钢、铜芯线、铜包铝三根示踪线埋在同一条PE燃气管道上方。PE管道全长约717m，然后对接头的导电性和防腐性进行测试。性能和强度，其次是数据分析，对示踪剂进行综合评价。

First, the 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 the joint are tested. Performance and strength, followed by data analysis, comprehensive evaluation of the tracer.

测试项目

Test items

①使用PCM管道电流衰减率法测试评估各种示踪线对检测信号的导通情况；

① PCM pipeline current decay rate method is used to test and evaluate the conduction of various trace line pairs;

②对各种示踪线施工过程中接头的防腐处理进行测试，评估示踪线在长期埋藏后是否能保持连接不被腐蚀和断裂；

② Test the anti-corrosion treatment of joints during the construction of various trace lines, and evaluate whether the trace lines can keep the connection from corrosion and fracture after long-term burial;

③测试评估3条示踪线是否同时埋设在某段PE燃气管道上，能否准确定位管道空间位置。

③ Test and evaluate whether the three tracing lines are buried on a PE gas pipeline at the same time, and whether the spatial position of the pipeline can be accurately located.

检测数据分析

Test data analysis

①检测数据系统分析表明，铜包钢、铜芯线、铜包铝三种示踪线在相同交叉条件下，检测电流的信号传导无明显差异。截面积。两条铝包线的走线传导信号几乎一样，铜芯线的走线传导信号稍好一些，但没有显着差异。

① The systematic analysis of the test data shows that there is no significant difference in the signal conduction of the test current under the same crossing conditions for the three kinds of trace wires: copper-clad steel, copper core wire and copper-clad aluminum. Sectional area. The routing conductive signals of the two aluminum clad wires are almost the same, and the routing conductive signals of the copper core wire are slightly better, but there is no significant difference.

②三种燃气示踪线在接头的防腐处理上有很大的不同。在测试中，这三根示踪线的接头处都存在漏电问题，尤其是铜包铝，漏电接头较多。这些泄漏点埋藏时间长了，示踪线就会被腐蚀断开，失去示踪对管道的作用。铜芯线示踪线接头经过良好的防腐处理，仅发现一处漏电问题，其次是铜包钢示踪线。

② There are great differences among the three kinds of fuel gas tracing lines in the anti-corrosion treatment of joints. During the test, there were leakage problems at the joints of the three trace wires, especially the copper-clad aluminum, with many leakage joints. If these leakage points are buried for a long time, the tracing line will be corroded and disconnected, and the tracing effect on the pipeline will be lost. After good anti-corrosion treatment, only one leakage problem was found in the copper core tracer wire joint, followed by the copper-clad steel tracer wire.

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