Introducing electrical spark testing: ensuring the integrity of pipeline coatings

Electrical spark testing is a crucial method utilized for inspecting the quality of anti-corrosion coatings on metal substrates, particularly in the context of metal pipelines. This sophisticated technique is primarily employed to detect defects such as pinholes and voids in thick, non-conductive coatings, enabling thorough quality assurance and post-service inspection of pipeline coatings.

Electrical Spark Testing

The fundamental principle of electrical spark testing lies in the detection of extremely low resistance and void density at areas where the insulation coating is thin or compromised, leading to spark discharge when subjected to high voltage. This phenomenon triggers a pulse signal in the alarm circuit, prompting the alarm device to emit audible and visual warnings, effectively identifying and localizing areas of coating damage.

The key equipment used for electrical spark testing is the electrical spark tester, also known as the spark tester or spark leak detector. It comprises three main components: the main unit, high-voltage probe, and probe electrode. The main unit integrates control electronics and alarm devices, while the high-voltage probe houses the high-voltage generator, output button switch, and lead-out wires. Additionally, there are two types of probe electrodes available: direct probe brushes and flat probe brushes.

During the electrical spark testing process, it is essential to select an appropriate testing voltage based on the thickness of the protective layer or in accordance with industry-specific testing standards. Moreover, personnel conducting the tests must wear insulated gloves and avoid direct contact with the probe and the object under test to prevent electric shock or injury.

As a leading provider in the pipeline systems industry, Haihao Group leverages advanced technologies and expertise to offer comprehensive solutions for the inspection and maintenance of pipeline coatings. With our commitment to quality and safety, we ensure the integrity and longevity of your pipeline infrastructure. Partner with Haihao Group for reliable electrical spark testing services and safeguard the performance of your pipeline systems. Contact us today to learn more about our innovative solutions and tailored services.