WILLIAMS OLEFINS FEEDSTOCK PIPELINES, LLC
gas_transmission Incident — — April 30, 2021
Incident Information
| Incident Date | April 30, 2021 |
| Operator | WILLIAMS OLEFINS FEEDSTOCK PIPELINES, LLC |
| Commodity | OTHER GAS |
| Pipeline Type | gas_transmission |
Location
| State | |
| Coordinates | 29.72404, -95.07316 |
Cause
| Cause | EQUIPMENT FAILURE |
| Subcause | NON-THREADED CONNECTION FAILURE |
Casualties
| Fatalities | 0 |
| Injuries | 0 |
Costs
| Property Damage | $200,000 |
| Emergency Response | $1 |
| Other Costs | $0 |
Location Map
Incident Narrative
4/29/21 THE PAINTING CREW, HIRED BY WILLIAMS TO COAT NEW VALVES THAT WERE INSTALLED AT THE OXY METER STATION, NOTICED SOME CONDENSATION AROUND THE TOP WORKS OF THE NEW VALVE THEY WERE PAINTING. WILLIAMS OPS TECHS WERE ON SITE AND CHECKED THE AREA WITH A PH STIP - READINGS WERE INDICATIVE TO THE PRESENCE OF HCL. MANAGEMENT AND ENGINEERING WERE NOTIFIED, AND A FIRST REPAIR ATTEMPT WAS MADE (INJECTING PACKING INTO THE VALVE). AFTER THE PACKING WAS INJECTED INTO THE VALVE, THE TEAM BEGAN TO SEE SMALL/INTERMITTENT ""PUFFS"" OF HCL. 4/30/21 WILLIAMS'S CUSTOMER PULLED THE LINE PACK OF HCL DOWN TO ABOUT 3 PSI. AFTER THE LINE WENT FROM ~100 PSI TO ~3 PSI, THE ""PUFFS OF HCL"" WERE NO LONGER VISIBLE. 5/1/21 N2 LINE PURGING BEGAN 5/7/21 VALVE WAS REPLACED WITH A PRE-FABRICATED SPOOL PIECE
About This Pipeline Incident
Pipeline incident data is reported to the Pipeline and Hazardous Materials Safety Administration (PHMSA). All significant incidents involving fatalities, injuries, or property damage over $50,000 must be reported.