Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2012-10-23 — TX
Operator
Enbridge Pipelines (Ozark) L.l.c.
Cause
Equipment Failure
Commodity
Crude Oil
Program
HL
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$15,000
Incident datetime
2012-10-23 11:50
Report number
Location
TX
Narrative
On october 23, 2012 at approximately 11:50, an enbridge contractor observed oil in the cushing central terminal in the manifold 212 vicinity. The terminal supervisor was notified and dispatched resources to investigate the situation. After three days of excavating and investigating the source of the leak, it was then determined this incident would exceed $50,000, therefore meeting the requirements of a call to the nrc and a 30 day PHMSA report. Although the actual cause was not identified, it is speculated that the bolts on the bottom of a 16" flange were elastically deformed by the dead load of overburden, allowing oil to escape. When the burden was removed, the flange was allowed to close back up and oil has not escaped from the flange since. The pipeline maintenance services group confirmed bolted connection integrity by checking torque on the buried flanges in this manifold and all torque values met the required values. The buried piping in this manifold area was backfilled with flowable fill (portland cement with no aggregate) to mid-pipe level providing support so that future deflection of the pipe is not possible. The manifold was returned to full operational service a few days after finding oil.
Detailed record list
Report Received Date
2012-11-21 00:00:00
Iyear
2012
Report Number
20120330
Supplemental Number
18460
Report Type
Supplemental Final
Operator Id
31947
Name
Enbridge Pipelines (Ozark) L.l.c.
Operator Street Address
915 N Eldridge Parkway, Suite 1100
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77079
Local Datetime
2012-10-23 11:50:00
Location Latitude
35.944728
Location Longitude
-96.764824
Commodity Released Type
Crude Oil
Unintentional Release Bbls
0.83
Intentional Release Bbls
0
Recovered Bbls
0.83
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Local Operating Personnel, Including Contractors
Operator Type
Contractor Working For The Operator
Incident Identified Datetime
2012-10-23 11:50:00
System Part Involved
Onshore Terminal/tank Farm Equipment And Piping
On Off Shore
Onshore
Shutdown Due Accident Ind
No
Shutdown Explain
Piping Was Isolated Until The Leak Area Was Investigated.
On Site Datetime
2012-10-23 12:00:00
Nrc Rpt Datetime
2012-10-26 16:39:00
Nrc Rpt Num
1028467
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Pipe Fac Name
Cushing Terminal Central
Segment Name
Manifold 212
Onshore State Abbreviation
Ok
Onshore Postal Code
74023
Onshore City Name
Cushing
Onshore County Name
Payne
Designated Location
Survey Station No.
Federal
No
Location Type
Totally Contained On Operator-Controlled Property
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
60
Crossing
No
Pipe Facility Type
Interstate
Item Involved
Flange Assembly
Installation Year
2012
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Connection Failure
Wildlife Impact Ind
No
Soil Contamination
Yes
Long Term Assessment
No
Remediation Ind
No
Water Contam Ind
No
Could Be Hca
No
Commodity Reached Hca
No
Est Cost Oper Paid
0
Est Cost Gas Released
100
Est Cost Prop Damage
15000
Est Cost Emergency
75000
Est Cost Environmental
5000
Est Cost Other
0
Prpty
95100
Accident Psig
275
Mop Psig
275
Accident Pressure
Pressure Did Not Exceed Mop
Pressure Restriction Ind
No
Pipeline Function
> 20% Smys Regulated Transmission
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
No
Scada Conf Ind
No
Cpm In Place Ind
No
Investigation Status
Yes, specify investigation result(s): (select all that apply)
Invest Schedule Ind
Yes
Invest No Control Room Ind
Yes
Invest No Controller Ind
Yes
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Equipment Failure
Cause Details
Malfunction Of Control/relief Equipment
Eq Failure Type
Malfunction Of Control/relief Equipment
Other Control Relief Ind
Yes
Other Control Relief Details
Flange Connection
Additional Support Ind
Yes
Preparer Name
T****** M P*****
Preparer Title
Compliance Analyst
Preparer Email
T*************@e*******.com
Preparer Telephone
715-394-1468
Preparer Fax
832-325-5477
Prepared Date
2013-08-20 00:00:00
Authorizer Name
D**** S*******
Authorizer Telephone
715-394-1567
Authorizer Title
Manager Us Pipeline Compliance
Authorizer Email
D*************@e*******.com
Narrative
On october 23, 2012 at approximately 11:50, an enbridge contractor observed oil in the cushing central terminal in the manifold 212 vicinity. The terminal supervisor was notified and dispatched resources to investigate the situation. After three days of excavating and investigating the source of the leak, it was then determined this incident would exceed $50,000, therefore meeting the requirements of a call to the nrc and a 30 day PHMSA report. Although the actual cause was not identified, it is speculated that the bolts on the bottom of a 16" flange were elastically deformed by the dead load of overburden, allowing oil to escape. When the burden was removed, the flange was allowed to close back up and oil has not escaped from the flange since. The pipeline maintenance services group confirmed bolted connection integrity by checking torque on the buried flanges in this manifold and all torque values met the required values. The buried piping in this manifold area was backfilled with flowable fill (portland cement with no aggregate) to mid-pipe level providing support so that future deflection of the pipe is not possible. The manifold was returned to full operational service a few days after finding oil.
| Report Received Date | 2012-11-21 00:00:00 |
|---|---|
| Iyear | 2012 |
| Report Number | 20120330 |
| Supplemental Number | 18460 |
| Report Type | Supplemental Final |
| Operator Id | 31947 PHMSA Enforcement |
| Name | Enbridge Pipelines (Ozark) L.l.c. |
| Operator Street Address | 915 N Eldridge Parkway, Suite 1100 |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77079 |
| Local Datetime | 2012-10-23 11:50:00 |
| Location Latitude | 35.944728 Google Maps OpenStreetMap |
| Location Longitude | -96.764824 Google Maps OpenStreetMap |
| Commodity Released Type | Crude Oil |
| Unintentional Release Bbls | 0.83 |
| Intentional Release Bbls | 0 |
| Recovered Bbls | 0.83 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Local Operating Personnel, Including Contractors |
| Operator Type | Contractor Working For The Operator |
| Incident Identified Datetime | 2012-10-23 11:50:00 |
| System Part Involved | Onshore Terminal/tank Farm Equipment And Piping |
| On Off Shore | Onshore |
| Shutdown Due Accident Ind | No |
| Shutdown Explain | Piping Was Isolated Until The Leak Area Was Investigated. |
| On Site Datetime | 2012-10-23 12:00:00 |
| Nrc Rpt Datetime | 2012-10-26 16:39:00 |
| Nrc Rpt Num | 1028467 NRC Report How to search |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Cushing Terminal Central |
| Segment Name | Manifold 212 |
| Onshore State Abbreviation | Ok |
| Onshore Postal Code | 74023 |
| Onshore City Name | Cushing |
| Onshore County Name | Payne |
| Designated Location | Survey Station No. |
| Federal | No |
| Location Type | Totally Contained On Operator-Controlled Property |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 60 |
| Crossing | No |
| Pipe Facility Type | Interstate |
| Item Involved | Flange Assembly |
| Installation Year | 2012 |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Connection Failure |
| Wildlife Impact Ind | No |
| Soil Contamination | Yes |
| Long Term Assessment | No |
| Remediation Ind | No |
| Water Contam Ind | No |
| Could Be Hca | No |
| Commodity Reached Hca | No |
| Est Cost Oper Paid | 0 |
| Est Cost Gas Released | 100 |
| Est Cost Prop Damage | 15000 |
| Est Cost Emergency | 75000 |
| Est Cost Environmental | 5000 |
| Est Cost Other | 0 |
| Prpty | 95100 |
| Accident Psig | 275 |
| Mop Psig | 275 |
| Accident Pressure | Pressure Did Not Exceed Mop |
| Pressure Restriction Ind | No |
| Pipeline Function | > 20% Smys Regulated Transmission |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | No |
| Scada Conf Ind | No |
| Cpm In Place Ind | No |
| Investigation Status | Yes, specify investigation result(s): (select all that apply) |
| Invest Schedule Ind | Yes |
| Invest No Control Room Ind | Yes |
| Invest No Controller Ind | Yes |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Equipment Failure |
| Cause Details | Malfunction Of Control/relief Equipment |
| Eq Failure Type | Malfunction Of Control/relief Equipment |
| Other Control Relief Ind | Yes |
| Other Control Relief Details | Flange Connection |
| Additional Support Ind | Yes |
| Preparer Name | T****** M P***** |
| Preparer Title | Compliance Analyst |
| Preparer Email | T*************@e*******.com |
| Preparer Telephone | 715-394-1468 |
| Preparer Fax | 832-325-5477 |
| Prepared Date | 2013-08-20 00:00:00 |
| Authorizer Name | D**** S******* |
| Authorizer Telephone | 715-394-1567 |
| Authorizer Title | Manager Us Pipeline Compliance |
| Authorizer Email | D*************@e*******.com |
| Narrative | On october 23, 2012 at approximately 11:50, an enbridge contractor observed oil in the cushing central terminal in the manifold 212 vicinity. The terminal supervisor was notified and dispatched resources to investigate the situation. After three days of excavating and investigating the source of the leak, it was then determined this incident would exceed $50,000, therefore meeting the requirements of a call to the nrc and a 30 day PHMSA report. Although the actual cause was not identified, it is speculated that the bolts on the bottom of a 16" flange were elastically deformed by the dead load of overburden, allowing oil to escape. When the burden was removed, the flange was allowed to close back up and oil has not escaped from the flange since. The pipeline maintenance services group confirmed bolted connection integrity by checking torque on the buried flanges in this manifold and all torque values met the required values. The buried piping in this manifold area was backfilled with flowable fill (portland cement with no aggregate) to mid-pipe level providing support so that future deflection of the pipe is not possible. The manifold was returned to full operational service a few days after finding oil. |
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