① Due to the fixed rolling bearings in the packaging of copper clad steel and copper clad aluminum, the installation of PE gas pipelines is relatively simple and labor-saving compared to copper core wires.

② The construction unit uses general electrical tape to wrap and connect copper core wire tracer wire, and some even use transparent tape to wrap and connect. After on-site practice, it has been verified that this connection method is not firm, has low strength, and cannot effectively prevent water insulation. After a period of time, groundwater infiltration can cause signal loss here, This will affect the detection of PE gas pipeline location and the management of pipeline operation in the future.

Copper clad steel has special connectors, such as screw connectors and tee connectors, and the connection strength is high. As long as the construction personnel handle the joints properly, it has good waterproof and insulation effects, which is conducive to extending the service life of the tracer wire. Although copper coated aluminum also has specialized connectors, due to the significant difference in chemical activity between copper and aluminum, once the anti-corrosion treatment of the connector is not good and it is wetted by liquid in the soil, it will form a primary battery, which will accelerate the electrochemical corrosion of the copper coated aluminum tracer wire. Generally, it will completely corrode and break off within 1-2 years, thus losing its tracing effect.

③ The anti-corrosion protection layer of copper core wires is made of PVC material, which has good waterproof and anti-corrosion functions. However, the PVC material is prone to aging, which shortens the service life of the tracer wire; The outer anti-corrosion layer of copper clad steel and copper clad aluminum is made of polyethylene material, which is the same material as PE pipes. With good waterproof and anti-corrosion properties, it ensures the same service life as PE pipes laid together.

④ In theory, as long as the tracer wire can be connected and conductive, but in actual gas engineering construction, the selection of the tracer wire should consider the need for a certain tensile strength. If the strength of the tracer wire is not enough, it will often be pulled off and lose its function when the pipeline is backfilled or the ground sinks. During the construction process, it is inevitable that the tracer wire will be pulled off. Therefore, when selecting the tracer wire, not only should the strength of the detection signal be considered, but also the strength of the material of the tracer wire itself should be considered to reduce the problem of pulling off during construction.