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CSB Investigation
Report No. 2019-04-I-PA
2019
Safety Safety Environmental Environmental
Philadelphia Energy Solutions Refinery Air Cooler Rupture
Philadelphia Energy Solutions Refinery, Pennsylvania
Related equipment → Air cooler (air_cooler)
0Fatalities
0Injuries
Corrosive ruptureMechanism code STD
⌗Failure Mode · ISO 14224 Mapping
Damage mechanism (recorded in KB)
Corrosive ruptureSTD
ISO functional code (as recorded)
ISO 14224:2016 functional failure code
STD · Structural failure
ISO STD — Structural failure.
1What Happened
HF alkylation unit air cooler (fin-fan) corroded elbow rupture -> HF leak
2Root Cause
Wet H2S corrosion elbow thinning + inadequate air-cooler bundle inspection
3Reliability Lessons (from investigation root cause)
- Wet H2S corrosion elbow thinning
- inadequate air-cooler bundle inspection
4Associated Failure Mechanisms (Keywords)
air cooler fin tube bundle corrosion elbow leak bundle leak
About the Failure-Mode Code (click to expand)
The recorded code STD is an ISO 14224:2016 functional failure code (describes what the equipment failed to do). The damage mechanism (how it failed) is shown in the Mapping block above. The two are distinct dimensions in ISO 14224.
5Evidence Source (transparent)
Authority：U.S. Chemical Safety and Hazard Investigation Board (CSB)
Official Report：www.csb.gov ↗
Data Verification：verified_url_csb_sitemap
↗Related Failure Modes · Traceability