THERMAL EXPANSION AND THE FORGOTTEN ISOLATION VALVE
Incident: An outdoor long-distance transfer pipeline carrying liquid benzene was isolated at both ends via block valves for a weekend […]
NITROGEN PURGING AND THE BLIND TRUST IN “EMPTY” VESSELS
Incident A reactor vessel in a specialty chemical plant was shut down for internal inspection. Following standard operating procedures, the
THE DANGER OF “SILENT” ALARMS IN DEGRADED MODES
Degraded alarms still require attention During a scheduled maintenance turnaround at a petrochemical facility, a critical level transmitter on a