What standard measurement is used for pipeline voltage?

The standard measurement for pipeline voltage is 100 volts per mil. This measurement is commonly used in cathodic protection systems to assess the effectiveness of coating on pipelines. The "mil" refers to one-thousandth of an inch, which is a critical unit for understanding coating thickness and the subsequent electrical resistance.

When evaluating the quality and integrity of protective coatings on pipelines, measuring the voltage on the pipeline in relation to the thickness of the coating helps inspectors determine the level of protection provided against corrosion. The choice of 100 volts per mil reflects industry standards that have been established to ensure a reliable measure of the pipe coating's performance under inspection conditions. This knowledge is crucial for ensuring that corrosion protection measures are properly implemented, as inadequate coatings can lead to serious integrity issues and potential pipeline failures.