Units where graphitization may be suspected are the FCCU and the _____ unit.
Units where graphitization may be suspected are the FCCU and the _____ unit.
Graphitization is a degradation mechanism that primarily affects carbon steel materials at high temperatures over long periods. It is most commonly found in units like the Fluid Catalytic Cracking Unit (FCCU) and the Coker unit, where high temperatures and carbon steel use are prevalent. Therefore, the correct answer is Coker.
Graphitization primarily occurs in carbon steel piping and hot-wall equipment in the FCC, catalytic reforming, and coker units.