A structural integrity assessment of a pipe rack looks the same for years. Same paint, same silhouette against the skyline, same load it's carried since commissioning. Then one monsoon, a plant engineer walking the unit notices a hairline crack in the column base that wasn't there during the last turnaround. By the time someone measures the section thickness properly, the steel has lost nearly 40 percent of its original wall. Nobody saw this coming because nobody was really l