Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2023-06-08 — TX
Operator
Enbridge Holdings (Gray Oak) Llc
Cause
Corrosion Failure
Commodity
Crude Oil
Program
HL
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$111,550
Incident datetime
2023-06-08 00:00 UTC
Report number
Location
TX
Narrative
On may 9, 2023, at approximately 10:38 am cdt a release was discovered at the wink terminal in the booster pump area. The control center was immediately notified, and the line was shut down and wink terminal was isolated until the source of the release could be determined. Enbridge personnel and contractors were mobilized to the site for clean up and excavation to identify the source. Approximately 4 barrels of crude oil was released and contained within the terminal facility. The nrc was notified on may 9, 2023, at 12:51 pm cdt (nrc# 1366778) when it was determined that the costs would exceed the nrc reporting threshold. A 48-hour update to the nrc was made on may 11, 2023, at 10:13 am cdt (nrc# 1366960). The source of the release was identified as a 16" recirculation line in the booster pump manifold. The section of pipe was sleeved and returned to service. On june 23, 2023, the affected section of pipe was removed and sent to a third-party for a metallurgical analysis. After further investigation the cause of the release was determined to be due to internal corrosion pitting on the bottom side of the recirculation line. The results of the analysis indicate that the internal corrosion observed on the pipe occurred due to microbiologically influenced corrosion that was accelerated by the hypersaline conditions and presence of oxygen. Site remediation proceeded until early august 2023, with contaminated surface soil being removed from around the booster pump area. Several action plans have been created to enhance integrity management activities on similar pipe segments at other facilities on the gray oak system.
Detailed record list
Report Received Date
2023-06-08 00:00:00
Iyear
2023
Report Number
20230122
Supplemental Number
38701
Report Type
Supplemental Final
Operator Id
40668
Name
Enbridge Holdings (Gray Oak) Llc
Operator Street Address
915 N Eldridge Pkwy, Suite 1100
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77079
Time Zone
Central
Daylight Savings Ind
Yes
Location Latitude
31.756944
Location Longitude
-103.189166
Commodity Released Type
Crude Oil
Unintentional Release Bbls
4
Recovered Bbls
4
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Local Operating Personnel, Including Contractors
Operator Type
Operator Employee
System Part Involved
Onshore Terminal/tank Farm Equipment And Piping
On Off Shore
Onshore
Status When Identified
Normal Operation, Includes Pauses Between Batches And During Maintenance
Shutdown Due Accident Ind
Yes
Communication State Fed Ind
No
Nrc Rpt Num
1366778
Additional Nrc Report Numbers
1366960, 1380994
Ignite Ind
No
Notify Qualified Indiv Ind
Yes
Oil Spill Removal Org Ind
Yes
Osro Arrived On Site Dt
5/9/2023 14:30
Num Pub Evacuated
0
Pipe Fac Name
Wink Terminal
Segment Name
Recirculation Line
Onshore State Abbreviation
Tx
Onshore Postal Code
79789
Onshore City Name
Wink
Onshore County Name
Winkler
Designated Location
Survey Station No.
Designated Name
1309
Federal
No
Location Type
Totally Contained On Operator-Controlled Property
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
48
Crossing
No
Pipe Facility Type
Intrastate
Item Involved
Pipe
Pipe Type
Pipe Body
Puddle Weld Ind
No
Pipe Diameter
16
Pipe Wall Thickness
0.375
Pipe Smys
52000
Pipe Specification
X52
Pipe Seam Type
Erw - High Frequency
Pipe Manufacturer
Husteel
Pipe Coating Type
Fusion Bonded Epoxy(Fbe)
Coating Applied Ind
No
Installation Year
2019
Manufactured Year
2018
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Pinhole
Wildlife Impact Ind
No
Soil Contamination
Yes
Long Term Assessment
No
Remediation Ind
Yes
Soil Remed Ind
Yes
Water Contam Ind
No
Could Be Hca
No
Commodity Reached Hca
No
Est Cost Oper Paid
0
Est Cost Gas Released
300
Est Cost Prop Damage
111550
Est Cost Emergency
35000
Est Cost Environmental
2018174
Est Cost Other
0
Prpty
2165024
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
0
Num Business Building Affctd
0
Accident Psig
12
Mop Psig
285
Mop Cfr Section
Internal Design Pressure �195.406(A)(1)
Maop Established Date
2020-04-01 00:00:00
Maop Reversal Flow Ind
No
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
Yes
Cpm Operating Ind
Yes
Cpm Functional Ind
Yes
Cpm Detection Ind
No
Cpm Conf Ind
No
Investigation Status
No, the operator did not find that an investigation of the controller(s) actions or control room issues was necessary due to: (provide an explanation for why the operator did not investigate)
Investigation Status Details
Lack of control center involvement. Release was identified by field personnel and there was no indication of any issue or alarms.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Corrosion Failure
Cause Details
Internal Corrosion
Internal External
Internal Corrosion
Int Visual Exam Results
Localized Pitting
Int Microbiological Ind
Yes
Int Metallurgical Basis Ind
Yes
Int Low Point Pipe Loc Ind
Yes
Corrosion Inhibitors
No
Corrosion Lining
No
Cleaning Dewatering
Not Applicable - Not Mainline Pipe
Corrosion Coupons
Not Applicable - Not Mainline Pipe
Collected Data Ind
No
Has Hydrtst Conduc Before Ind
No
Direct Asmnt Conducted
No
Non Destructive Exam Ind
Yes
Exm Radiography Rcnt Year
2019
Exm Radiography Rcnt Ind
Yes
Preparer Name
S**** S****
Preparer Title
Advisor Regulatory Compliance
Preparer Email
S**********@e*******.com
Preparer Telephone
7153953620
Prepared Date
2023-10-26 00:00:00
Authorizer Name
L*** S**********
Authorizer Telephone
7153941584
Authorizer Title
Supervisor Regulatory Affairs Compliance
Authorizer Email
L***************@e*******.com
Narrative
On may 9, 2023, at approximately 10:38 am cdt a release was discovered at the wink terminal in the booster pump area. The control center was immediately notified, and the line was shut down and wink terminal was isolated until the source of the release could be determined. Enbridge personnel and contractors were mobilized to the site for clean up and excavation to identify the source. Approximately 4 barrels of crude oil was released and contained within the terminal facility. The nrc was notified on may 9, 2023, at 12:51 pm cdt (nrc# 1366778) when it was determined that the costs would exceed the nrc reporting threshold. A 48-hour update to the nrc was made on may 11, 2023, at 10:13 am cdt (nrc# 1366960). The source of the release was identified as a 16" recirculation line in the booster pump manifold. The section of pipe was sleeved and returned to service. On june 23, 2023, the affected section of pipe was removed and sent to a third-party for a metallurgical analysis. After further investigation the cause of the release was determined to be due to internal corrosion pitting on the bottom side of the recirculation line. The results of the analysis indicate that the internal corrosion observed on the pipe occurred due to microbiologically influenced corrosion that was accelerated by the hypersaline conditions and presence of oxygen. Site remediation proceeded until early august 2023, with contaminated surface soil being removed from around the booster pump area. Several action plans have been created to enhance integrity management activities on similar pipe segments at other facilities on the gray oak system.
| Report Received Date | 2023-06-08 00:00:00 |
|---|---|
| Iyear | 2023 |
| Report Number | 20230122 |
| Supplemental Number | 38701 |
| Report Type | Supplemental Final |
| Operator Id | 40668 PHMSA Enforcement |
| Name | Enbridge Holdings (Gray Oak) Llc |
| Operator Street Address | 915 N Eldridge Pkwy, Suite 1100 |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77079 |
| Time Zone | Central |
| Daylight Savings Ind | Yes |
| Location Latitude | 31.756944 Google Maps OpenStreetMap |
| Location Longitude | -103.189166 Google Maps OpenStreetMap |
| Commodity Released Type | Crude Oil |
| Unintentional Release Bbls | 4 |
| Recovered Bbls | 4 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Local Operating Personnel, Including Contractors |
| Operator Type | Operator Employee |
| System Part Involved | Onshore Terminal/tank Farm Equipment And Piping |
| On Off Shore | Onshore |
| Status When Identified | Normal Operation, Includes Pauses Between Batches And During Maintenance |
| Shutdown Due Accident Ind | Yes |
| Communication State Fed Ind | No |
| Nrc Rpt Num | 1366778 NRC Report How to search |
| Additional Nrc Report Numbers | 1366960, 1380994 |
| Ignite Ind | No |
| Notify Qualified Indiv Ind | Yes |
| Oil Spill Removal Org Ind | Yes |
| Osro Arrived On Site Dt | 5/9/2023 14:30 |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Wink Terminal |
| Segment Name | Recirculation Line |
| Onshore State Abbreviation | Tx |
| Onshore Postal Code | 79789 |
| Onshore City Name | Wink |
| Onshore County Name | Winkler |
| Designated Location | Survey Station No. |
| Designated Name | 1309 |
| Federal | No |
| Location Type | Totally Contained On Operator-Controlled Property |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 48 |
| Crossing | No |
| Pipe Facility Type | Intrastate |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Puddle Weld Ind | No |
| Pipe Diameter | 16 |
| Pipe Wall Thickness | 0.375 |
| Pipe Smys | 52000 |
| Pipe Specification | X52 |
| Pipe Seam Type | Erw - High Frequency |
| Pipe Manufacturer | Husteel |
| Pipe Coating Type | Fusion Bonded Epoxy(Fbe) |
| Coating Applied Ind | No |
| Installation Year | 2019 |
| Manufactured Year | 2018 |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Pinhole |
| Wildlife Impact Ind | No |
| Soil Contamination | Yes |
| Long Term Assessment | No |
| Remediation Ind | Yes |
| Soil Remed Ind | Yes |
| Water Contam Ind | No |
| Could Be Hca | No |
| Commodity Reached Hca | No |
| Est Cost Oper Paid | 0 |
| Est Cost Gas Released | 300 |
| Est Cost Prop Damage | 111550 |
| Est Cost Emergency | 35000 |
| Est Cost Environmental | 2018174 |
| Est Cost Other | 0 |
| Prpty | 2165024 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 0 |
| Num Business Building Affctd | 0 |
| Accident Psig | 12 |
| Mop Psig | 285 |
| Mop Cfr Section | Internal Design Pressure �195.406(A)(1) View CFR 49 §192 |
| Maop Established Date | 2020-04-01 00:00:00 |
| Maop Reversal Flow Ind | No |
| 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 | Yes |
| Cpm Operating Ind | Yes |
| Cpm Functional Ind | Yes |
| Cpm Detection Ind | No |
| Cpm Conf Ind | No |
| Investigation Status | No, the operator did not find that an investigation of the controller(s) actions or control room issues was necessary due to: (provide an explanation for why the operator did not investigate) |
| Investigation Status Details | Lack of control center involvement. Release was identified by field personnel and there was no indication of any issue or alarms. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Corrosion Failure |
| Cause Details | Internal Corrosion |
| Internal External | Internal Corrosion |
| Int Visual Exam Results | Localized Pitting |
| Int Microbiological Ind | Yes |
| Int Metallurgical Basis Ind | Yes |
| Int Low Point Pipe Loc Ind | Yes |
| Corrosion Inhibitors | No |
| Corrosion Lining | No |
| Cleaning Dewatering | Not Applicable - Not Mainline Pipe |
| Corrosion Coupons | Not Applicable - Not Mainline Pipe |
| Collected Data Ind | No |
| Has Hydrtst Conduc Before Ind | No |
| Direct Asmnt Conducted | No |
| Non Destructive Exam Ind | Yes |
| Exm Radiography Rcnt Year | 2019 |
| Exm Radiography Rcnt Ind | Yes |
| Preparer Name | S**** S**** |
| Preparer Title | Advisor Regulatory Compliance |
| Preparer Email | S**********@e*******.com |
| Preparer Telephone | 7153953620 |
| Prepared Date | 2023-10-26 00:00:00 |
| Authorizer Name | L*** S********** |
| Authorizer Telephone | 7153941584 |
| Authorizer Title | Supervisor Regulatory Affairs Compliance |
| Authorizer Email | L***************@e*******.com |
| Narrative | On may 9, 2023, at approximately 10:38 am cdt a release was discovered at the wink terminal in the booster pump area. The control center was immediately notified, and the line was shut down and wink terminal was isolated until the source of the release could be determined. Enbridge personnel and contractors were mobilized to the site for clean up and excavation to identify the source. Approximately 4 barrels of crude oil was released and contained within the terminal facility. The nrc was notified on may 9, 2023, at 12:51 pm cdt (nrc# 1366778) when it was determined that the costs would exceed the nrc reporting threshold. A 48-hour update to the nrc was made on may 11, 2023, at 10:13 am cdt (nrc# 1366960). The source of the release was identified as a 16" recirculation line in the booster pump manifold. The section of pipe was sleeved and returned to service. On june 23, 2023, the affected section of pipe was removed and sent to a third-party for a metallurgical analysis. After further investigation the cause of the release was determined to be due to internal corrosion pitting on the bottom side of the recirculation line. The results of the analysis indicate that the internal corrosion observed on the pipe occurred due to microbiologically influenced corrosion that was accelerated by the hypersaline conditions and presence of oxygen. Site remediation proceeded until early august 2023, with contaminated surface soil being removed from around the booster pump area. Several action plans have been created to enhance integrity management activities on similar pipe segments at other facilities on the gray oak system. |
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