NACE SP0274-2011 PDF Download

The NACE SP0274-2011 standard provides guidelines and procedures for inspecting pipeline coatings using high-voltage electrical testing methods. The standard covers the inspection of various types of coatings, including those on in-service pipelines as well as new or replacement coatings.

One of the commonly used methods for inspecting pipeline coatings is the high-voltage electrical inspection. The standard describes the use of holiday detectors, which are devices used for detecting defects in the coatings. It provides acknowledged techniques for the use of these detectors.

The standard also includes a table that specifies minimum testing voltages for different coating thicknesses. This ensures that the correct voltage is applied during the inspection process. The standard also provides guidance on testing voltages, grounding procedures, the condition of coating surfaces, and the proper care of equipment used for the inspection.