The test pile is used to detect the parameters of cathodic protection, and is an essential device in pipeline management and maintenance. It is arranged along the line according to the test function. Corresponding to the two terminals of the meter in the transmission line. Test pile can be divided into potential test pile, current test pile, insulation test pile and so on. Usually, a test pile is set up per kilometer, and a current test pile is usually set up at 5-8 kilometers.

The test pile is wired inside, and the reference electrode is connected at one side and the pipe is connected at the other. In this way, when testing the protection potential, there is no need to dig the pipe, and the multimeter can be used to connect it.

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According to the type of test pile, it can be divided into: potential test pile, current test pile, casing test pile, insulating connection test pile, sacrificial anode test pile and other test piles. According to the material, the test pile can be divided into steel tube test pile, FRP test pile, concrete test pile, plastic test pile, etc., the steel tube test pile can also be divided into carbon steel and stainless steel material.

Now the test pile has cement test pile, steel pipe test pile, FRP test pile, plastic test pile and so on. Special lots may be added as appropriate. The test pile is an essential device in the cathodic protection system, which is mainly used to detect the effect and operation parameters of cathodic protection. The test pile is mainly used to test the protection potential, and can be used to test the protection effect of cathodic protection system for metal structures such as storage tanks, pipelines, and wharf measures. It can also be used for testing the sacrificial anode current and insulating joint.