Plant InSites: Keep Under-Deposit Corrosion Under Control

摘要

MANY PLANTS are running at reduced rates at the moment. This raises a potential issue with piping. Economics usually result in fluid velocities in excess of 5 ft/sec for most systems. However, sustained operation at low rates due to COVID-19 may foster sedimentation at spots in piping systems where it never previously occurred - and create the potential for under-deposit corrosion (UDC). While the minimum velocity for sedimentation varies depending upon the system, any pipe with a liquid velocity under 1.5 ft/sec has a high possibility of sedimentation if solids are present.