ASTM G19-04 "Determination of disbonding of pipeline coatings by direct soil method" stipulates a standard test method for determining the disbonding characteristics of pipeline coatings by direct soil burial method. The standard specifies the test preparation process, standardizes the preparation of pipeline samples, the setting of soil burial conditions, the burial period and the detection steps. By evaluating the disbonding of pipeline coatings after soil burial, it provides a unified testing standard and judgment basis for scientifically judging the adhesion performance of pipeline coatings in the actual soil environment.