What Is a Pile Test?

The test pile is designed as a multifunctional test pile for the detection of cathodic protection parameters. It is an indispensable device in pipeline management and maintenance. It is arranged along the test function. Test piles are used to test pipeline potential, current, and insulation performance.

Test stub

The test pile is designed as a multifunctional test pile for the detection of cathodic protection parameters. It is an indispensable device in pipeline management and maintenance. It is arranged along the test function. Test piles are used to test pipeline potential, current, and insulation performance.

Chinese name

Test stub

Make up

Posts, terminal blocks, test leads, nameplates

Function

Detection of cathodic protection parameters

Classification

Potential test pile, sacrificial anode test pile, etc.

The test pile consists of a pile body, a test wiring board, a test lead and a nameplate. ^[1]

Mainly used

Significance of test piles in cathodic protection

A cathodic protection test pile shall be installed to determine the structure point, current and resistance. For this reason, no other better measuring device is available. For pipeline potential test piles, it is sufficient to set one for 1 ~ 2km. Generally, one pipeline current measurement pile is required for every five measurement piles. In densely populated areas of towns, the distance between potential measuring piles is about half a kilometer. In contrast, a grounded electrical insulation measuring pile needs to be provided on the buried electrical insulation. At the point of intersection with the DC traction system, a measuring pile should also be set. If required (eg on a high-ohm fixed surface) a fixed measuring point for measuring the potential of the structure should be provided.

During construction, cathodic protection test equipment should be installed at the same time as other cathodic protection systems. When installing a test device, the position should be set along the direction of the protected pipeline. The distance between two test devices adjacent to each other should be between 1 km and 3 km. If the pipeline passes through urban towns or industrial parks, the distance between adjacent test devices should not exceed 1 km. If the area affected by stray current interference is tested, the distance between test devices should be properly encrypted. The test equipment is generally installed in the following areas: the protected pipeline crosses or parallels the AC or DC electrified railway; the place where the insulation joint is installed; the place where the grounding system is connected; the location where the metal sleeve is installed; the protected pipe and other pipes or structures Where there is a connection amount; where the auxiliary test piece and grounding device are connected; where the pipeline crosses the surrounding road or dam; where it crosses the railway or flowing water; where it is adjacent to external metal structure buildings, etc. When installing a test device, at least two cables are connected to the protected pipeline, and the cables used should be distinguished by color or other signs, and the entire line must be unified.

1) Check the insulation between the terminal and the ground. The resistance value should be greater than 100 kohms. Measure with a multimeter. If it is less than this value, check whether the terminal and the outer tube are grounded.

2) The test pile should be painted and numbered regularly every year.

3) Prevent the damage and loss of test piles, and do a good job of propaganda and education for the protection of national property for urban and rural residents and children along the line. ^[2]

The development of China's anticorrosive material industry in China has become increasingly mature. With the improvement of industry and national standards, the expertise and actual performance of cathodic protection has become increasingly favored by investors in large-scale projects such as long-distance pipelines and oil storage tanks. The invested projects have indeed achieved good results through several years of testing and evaluation. How to unify the investment and the effect, it is necessary to do the actual measurement and survey of the design site and choose a well-known and highly skilled anticorrosive material manufacturer.

Domestic design institutes with strong anticorrosive material design: China Petroleum Southwest Design Institute, Shengli Oilfield Design Institute, North China Design Institute, etc.

The domestic well-known manufacturers of anticorrosive materials include: Jiaozuo Chengbang anticorrosive materials.