Fracture Behavior of Locally Corroded Steel Pipeline in District Heating System Using the Combination of Electrochemistry and Fracture Mechanics

To identify the effects of the stress concentration at the pit on the fracture of the district heating (DH) pipeline, the stress increase with the wall thickness reduction was formulated. The formula includes the stress intensity factor with the pitting corrosion. As a result of the application of the DH pipeline conditions to the ASME B31.3 code formula and corrosion test, the interplay with only uniform corrosion and stress due to the internal...