ONEOK NGL PIPELINE LP
hazardous_liquid Incident — — May 14, 2011
Incident Information
| Incident Date | May 14, 2011 |
| Operator | ONEOK NGL PIPELINE LP |
| Commodity | HVL OR OTHER FLAMMABLE OR TOXIC FLUID WHICH IS A GAS AT AMBI |
| Pipeline Type | hazardous_liquid |
Location
| State | |
| Coordinates | 41.63902, -88.12416 |
Cause
| Cause | CORROSION FAILURE |
| Subcause | EXTERNAL CORROSION |
Casualties
| Fatalities | 0 |
| Injuries | 0 |
Costs
| Property Damage | $549,459 |
| Emergency Response | $15,000 |
| Other Costs | $0 |
Location Map
Incident Narrative
"THIRD PARTY REPORTED PRODUCT RUNNING OUT OF PIPELINE VENT PIPES ON ONEOK 106W PIPELINE AT 135TH ST CROSSING IN ROMEOVILLE, ILL. PIPELINE CONTROL CENTER SHUT DOWN PIPELINE AND DISPATCHED ONEOK PERSONNEL. PIPELINE WAS ISOLATED BY BLOCKVALVES AND PRODUCT WAS FLARED AT ONEOK LEMONT STATION. CARRIER PIPE AT ROAD CROSSING WAS REMOVED AND REPLACED WITH NEW PIPE. REPLACEMENT PIPE WAS HYDROSTATICALLY TESTED BEFORE LINE WAS RETURNED TO OPERATION. FAILED PIPE WAS SENT OUT FOR METALLURGICAL ANALYSIS (KIEFNER & ASSOC.) TO DETERMINE CAUSE OF FAILURE. LEAK WAS CAUSED BY EXTERNAL CORROSION OF THE PIPE BODY WITHIN A CASED ROAD CROSSING. AN ISOLATED CORROSION PIT WAS FOUND UNDERNEASTH A CASING SPACER. THE METAL LOSS HAD REACHED A DEPTH OF 93% WALL THICKNESS, AT WHICH POINT THE REMAINING LIGAMENT FAILED DUE TO INTERNAL PRESSURE AND A QUARTER-INCH TEAR FORMED. THE CASING SPACERS USED FOR THIS PARTICULAR CROSSING WERE COMPRISED OF BOLT-ON STEEL SLEEVES THAT WERE INSULATED AND CUSHIONED FROM THE COATED PIPE SURFACE WITH A RUBBER PAD. THE RUBBER PAD WAS OUT OF POSITION ON THE CASING SPACER THAT WAS OVER THE LEAK SUCH THAT PART OF THE STEEL SPACER WAS IN CONTACT WITH THE PIPE SURFACE."
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.