之前的PE管不导电，不导磁，没步伐对管道举行追踪，关于一样平常维修很是贫困，而燃气示踪线了非金属管线不可使用金属管线寻管仪探查的问题。那么来讲讲
燃气示踪线生长、作用及铺设注重事项吧。
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.
示踪线的生长
Development of trace line
1、一代示踪线：是由铝箔和塑料薄膜的母体组成，铝箔主要是传输信号，母体是牢靠铝箔。这种示踪线弱点：铝箔强度很是低，纵然在生产，运输历程中也很容易断裂，辅设易损伤，同时铝箔的电阻很是大，有用探测距离和深度有限。
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、二代示踪线：是由钢丝和塑料薄膜压制而成，该示踪线由钢丝为导体，电阻大，探测距离有限，难以知足现实需要。
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、三代示踪线：是由铜包钢金属线芯和PE外� ；げ阕槌�，外观成线状。
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.
示踪线的作用
Function of tracer line
“示踪线”用于对PE管道的探测、追踪及定位。“示踪线”同PE管一起铺设;一样平常会接纳金属线芯，通过探测装备给“金属线”施加信号，由探测吸收机吸收信号，从而找到示踪线的准确位置，即同步追踪到PE燃气管道的详细位置;以便于对PE管道举行刷新及维修。
"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.
示踪线铺设注重事项
Precautions for laying tracer line
1、踪线埋设时应紧贴PE管道呈直线状，并位于管道的顶面为好。请勿以螺旋状纠葛在PE管道上埋设，这样易导致探测效果禁绝确。
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、在窨井或出地处示踪线应该预留出一定长度的导线(1m以上为宜)，供探测施加信号所用。这样可提髙探测效率和精度。
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、示踪线讨论或分支点一定要毗连牢靠，坚持优异导电,并用绝缘胶布包好，避免地下湿润而造成侵蚀断线情形，使探测信号中止。管道的钢塑转换讨论处示踪线可以焊接在法兰上，接点处做好防腐处理，避免日久后侵蚀断线。
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、为增添示踪线的信号强度并让信号漫衍匀称，施工时须只管减小示踪线埋地最后的接地电阻，接纳剥掉绝缘层裸露芯线30cm的优异接境地伐。特殊是关于长度较短的分支管的最后，一定要接地优异，不然分支上的信号会很是弱而探测不到。
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、若管道埋地长度凌驾1km，中心又没有窨井等设施供预留示踪线头知足探测之需，则建议每处设一个测试桩并预留示踪线讨论供探测时使用。
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、在非开挖工程施工中，PE管道外面的示踪线在拖管历程中容易被扯断，轻盈的步伐是选择截面积更大、强度更高的导线或钢丝绳，或者在管道的内部预穿一条示踪线即可阻止断线，其探测效果犹如在外面一样，但这样做时需处理好内部示踪线头与外面示踪线毗连的问题。
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、在某些特殊情形下，对PE管道无法应用示踪线，这时可接纳预埋示踪球的要领知足以后的探测定位需要。
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.
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