Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2023-12-20 — OK
Operator
Oneok Ngl Pipeline, Llc
Cause
Corrosion Failure
Commodity
Hvl Or Other Flammable Or Toxic Fluid Which Is A Gas At Ambient Conditions
Program
HL
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$78,000
Incident datetime
2023-12-20 00:00 UTC
Report number
Location
OK
Narrative
On november 27th, 2023 at 1:15pm the oneok pipeline control center was contacted by an oneok contractor stating frost on the ground in the vicinity of oneok's 6" tecumseh pipeline. The pipeline section was isolated, blocked in, and nitrogen purged. A pinhole leak was found on the pipe and repairs were made by pipe replacement. The removed pipe will be sent to a lab for metallurgical analysis. Results from the analysis will be included in the supplemental report once the investigation is complete. 05/13/24 update: the metallurgical report identified that the leak occurred within a region of external corrosion. Based on examination of the deposits and metallography across the leak, the observed external corrosion occurred in an environment containing water and oxygen due to a trapped environment present beneath disbonded tape coating. Due to the condition of the coating, shielding was present that did not allow cathodic protection current to reach the pipe surface leading to the observed higher corrosion rates. Approximately 10 feet of pipe was replaced at the leak location.
Detailed record list
Report Received Date
2023-12-20 00:00:00
Iyear
2023
Report Number
20230304
Supplemental Number
39544
Report Type
Supplemental Final
Operator Id
32109
Name
Oneok Ngl Pipeline, Llc
Operator Street Address
100 West Fifth Street
Operator City Name
Tulsa
Operator State Abbreviation
OK
Operator Postal Code
74103
Time Zone
Central
Daylight Savings Ind
Yes
Location Latitude
35.06654
Location Longitude
-96.89865
Commodity Released Type
Hvl Or Other Flammable Or Toxic Fluid Which Is A Gas At Ambient Conditions
Commodity Subtype
Lpg (Liquefied Petroleum Gas) / Ngl (Natural Gas Liquid)
Unintentional Release Bbls
4.1
Intentional Release Bbls
27.5
Recovered Bbls
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Local Operating Personnel, Including Contractors
Operator Type
Contractor Working For The Operator
System Part Involved
Onshore Pipeline, Including Valve Sites
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
Yes
Party Initiated Communication
Operator
Nrc Rpt Num
1385269
Additional Nrc Report Numbers
1385421
Ignite Ind
No
Upstream Action Taken
Valve Closure
Upstream Valve Type Ind
Manual
Downstream Action Taken
Valve Closure
Downstream Valve Type Ind
Manual
Num Pub Evacuated
0
Pipe Fac Name
Tecumseh Ada Jct To Tecumseh Plant
Segment Name
10187
Onshore State Abbreviation
Ok
Onshore Postal Code
74826
Onshore City Name
Not Within A Municipality
Onshore County Name
Pottawatomie
Designated Location
Survey Station No.
Designated Name
54838.44
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
42
Crossing
No
Pipe Facility Type
Intrastate
Item Involved
Pipe
Pipe Type
Pipe Body
Puddle Weld Ind
No
Pipe Diameter
6
Pipe Wall Thickness
0.156
Pipe Smys
42000
Pipe Specification
Api 5l
Pipe Seam Type
Erw - High Frequency
Pipe Manufacturer
Textube
Pipe Coating Type
Cold Applied Tape
Coating Applied Ind
Yes
Installation Year
1988
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Pinhole
Wildlife Impact Ind
No
Soil Contamination
No
Long Term Assessment
No
Remediation Ind
No
Water Contam Ind
No
Could Be Hca
Yes
Commodity Reached Hca
No
Est Cost Oper Paid
1500
Est Cost Gas Released
100
Est Cost Prop Damage
78000
Est Cost Emergency
0
Est Cost Environmental
33000
Est Cost Other
8500
Est Cost Other Details
Metallurgical Testing Of The Pipe
Prpty
121100
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
0
Num Business Building Affctd
0
Accident Psig
650
Mop Psig
1440
Mop Cfr Section
Component Design Pressure �195.406(A)(2)
Maop Established Date
1988-12-09 00:00:00
Maop Reversal Flow Ind
No
Accident Pressure
Pressure Did Not Exceed Mop
Pressure Restriction Ind
No
Length Segment Isolated
56733
Internal Inspection Ind
Yes
Operation Complications 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
No controller actions had taken place prior to the leak on this pipeline.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Corrosion Failure
Cause Details
External Corrosion
Internal External
External Corrosion
Visual Exam Results
Localized Pitting
Other Corrosion Ind
Yes
Corrosion Type Details
External Corrosion Beneath Disbonded Tape Coating
Field Exam Basis Ind
Yes
Metallurgical Basis Ind
Yes
Underground Location
Yes
Under Cathodic Protection Ind
Yes
Cathodic Pro Start Year
1989
Shielding Evident
Yes
Cathodic Survey Type
Yes
Cp Annual Survey Ind
Yes
Cp Annual Survey Year
2023
Prior Damage
Yes
Collected Data Ind
Yes
Axial Magnetic Flx Lkg Ind
Yes
Geometry Deformation Ind
Yes
Axial Recent Year
2023
Axial Rcnt Propul Method
Free Swimming
Axial Rcnt Attuned Detect
Metal Loss
Axial Rcnt Atnd Dtct Metal
High Resolution
Axial Previous Year
2018
Axial Prev Propul Method
Free Swimming
Axial Prev Attuned Detect
Metal Loss
Axial Prev Atnd Dtct Metal
High Resolution
Geometry Recent Year
2023
Geometry Rcnt Propul Method
Free Swimming
Geometry Rcnt Resolution
High Resolution
Geometrt Rcnt Measur Cups
No Cups
Geometry Previous Year
2018
Geometry Prev Propul Method
Free Swimming
Geometry Prev Resolution
High Resolution
Geometrt Prev Measur Cups
No Cups
Has Hydrtst Conduc Before Ind
No
Direct Asmnt Conducted
No
Non Destructive Exam Ind
No
Preparer Name
P**** G**** R****
Preparer Title
Regulatory Compliance Specialist
Preparer Email
P***************@o****.com
Preparer Telephone
5803956238
Prepared Date
2024-05-13 00:00:00
Local Contact Name
P**** G**** R****
Local Contact Email
P***************@o****.com
Local Contact Telephone
5803956238
Authorizer Name
M*** G******
Authorizer Telephone
918-588-7382
Authorizer Title
Vp Natrual Gas Liquids Pipelines And Terminals
Authorizer Email
M**************@o****.com
Narrative
On november 27th, 2023 at 1:15pm the oneok pipeline control center was contacted by an oneok contractor stating frost on the ground in the vicinity of oneok's 6" tecumseh pipeline. The pipeline section was isolated, blocked in, and nitrogen purged. A pinhole leak was found on the pipe and repairs were made by pipe replacement. The removed pipe will be sent to a lab for metallurgical analysis. Results from the analysis will be included in the supplemental report once the investigation is complete. 05/13/24 update: the metallurgical report identified that the leak occurred within a region of external corrosion. Based on examination of the deposits and metallography across the leak, the observed external corrosion occurred in an environment containing water and oxygen due to a trapped environment present beneath disbonded tape coating. Due to the condition of the coating, shielding was present that did not allow cathodic protection current to reach the pipe surface leading to the observed higher corrosion rates. Approximately 10 feet of pipe was replaced at the leak location.
| Report Received Date | 2023-12-20 00:00:00 |
|---|---|
| Iyear | 2023 |
| Report Number | 20230304 |
| Supplemental Number | 39544 |
| Report Type | Supplemental Final |
| Operator Id | 32109 PHMSA Enforcement |
| Name | Oneok Ngl Pipeline, Llc |
| Operator Street Address | 100 West Fifth Street |
| Operator City Name | Tulsa |
| Operator State Abbreviation | OK |
| Operator Postal Code | 74103 |
| Time Zone | Central |
| Daylight Savings Ind | Yes |
| Location Latitude | 35.06654 Google Maps OpenStreetMap |
| Location Longitude | -96.89865 Google Maps OpenStreetMap |
| Commodity Released Type | Hvl Or Other Flammable Or Toxic Fluid Which Is A Gas At Ambient Conditions |
| Commodity Subtype | Lpg (Liquefied Petroleum Gas) / Ngl (Natural Gas Liquid) |
| Unintentional Release Bbls | 4.1 |
| Intentional Release Bbls | 27.5 |
| Recovered Bbls | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Local Operating Personnel, Including Contractors |
| Operator Type | Contractor Working For The Operator |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| 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 | Yes |
| Party Initiated Communication | Operator |
| Nrc Rpt Num | 1385269 NRC Report How to search |
| Additional Nrc Report Numbers | 1385421 |
| Ignite Ind | No |
| Upstream Action Taken | Valve Closure |
| Upstream Valve Type Ind | Manual |
| Downstream Action Taken | Valve Closure |
| Downstream Valve Type Ind | Manual |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Tecumseh Ada Jct To Tecumseh Plant |
| Segment Name | 10187 |
| Onshore State Abbreviation | Ok |
| Onshore Postal Code | 74826 |
| Onshore City Name | Not Within A Municipality |
| Onshore County Name | Pottawatomie |
| Designated Location | Survey Station No. |
| Designated Name | 54838.44 |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 42 |
| Crossing | No |
| Pipe Facility Type | Intrastate |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Puddle Weld Ind | No |
| Pipe Diameter | 6 |
| Pipe Wall Thickness | 0.156 |
| Pipe Smys | 42000 |
| Pipe Specification | Api 5l |
| Pipe Seam Type | Erw - High Frequency |
| Pipe Manufacturer | Textube |
| Pipe Coating Type | Cold Applied Tape |
| Coating Applied Ind | Yes |
| Installation Year | 1988 |
| Manufactured Year | Unknown |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Pinhole |
| Wildlife Impact Ind | No |
| Soil Contamination | No |
| Long Term Assessment | No |
| Remediation Ind | No |
| Water Contam Ind | No |
| Could Be Hca | Yes |
| Commodity Reached Hca | No |
| Est Cost Oper Paid | 1500 |
| Est Cost Gas Released | 100 |
| Est Cost Prop Damage | 78000 |
| Est Cost Emergency | 0 |
| Est Cost Environmental | 33000 |
| Est Cost Other | 8500 |
| Est Cost Other Details | Metallurgical Testing Of The Pipe |
| Prpty | 121100 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 0 |
| Num Business Building Affctd | 0 |
| Accident Psig | 650 |
| Mop Psig | 1440 |
| Mop Cfr Section | Component Design Pressure �195.406(A)(2) View CFR 49 §192 |
| Maop Established Date | 1988-12-09 00:00:00 |
| Maop Reversal Flow Ind | No |
| Accident Pressure | Pressure Did Not Exceed Mop |
| Pressure Restriction Ind | No |
| Length Segment Isolated | 56733 |
| Internal Inspection Ind | Yes |
| Operation Complications 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 | No controller actions had taken place prior to the leak on this pipeline. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Corrosion Failure |
| Cause Details | External Corrosion |
| Internal External | External Corrosion |
| Visual Exam Results | Localized Pitting |
| Other Corrosion Ind | Yes |
| Corrosion Type Details | External Corrosion Beneath Disbonded Tape Coating |
| Field Exam Basis Ind | Yes |
| Metallurgical Basis Ind | Yes |
| Underground Location | Yes |
| Under Cathodic Protection Ind | Yes |
| Cathodic Pro Start Year | 1989 |
| Shielding Evident | Yes |
| Cathodic Survey Type | Yes |
| Cp Annual Survey Ind | Yes |
| Cp Annual Survey Year | 2023 |
| Prior Damage | Yes |
| Collected Data Ind | Yes |
| Axial Magnetic Flx Lkg Ind | Yes |
| Geometry Deformation Ind | Yes |
| Axial Recent Year | 2023 |
| Axial Rcnt Propul Method | Free Swimming |
| Axial Rcnt Attuned Detect | Metal Loss |
| Axial Rcnt Atnd Dtct Metal | High Resolution |
| Axial Previous Year | 2018 |
| Axial Prev Propul Method | Free Swimming |
| Axial Prev Attuned Detect | Metal Loss |
| Axial Prev Atnd Dtct Metal | High Resolution |
| Geometry Recent Year | 2023 |
| Geometry Rcnt Propul Method | Free Swimming |
| Geometry Rcnt Resolution | High Resolution |
| Geometrt Rcnt Measur Cups | No Cups |
| Geometry Previous Year | 2018 |
| Geometry Prev Propul Method | Free Swimming |
| Geometry Prev Resolution | High Resolution |
| Geometrt Prev Measur Cups | No Cups |
| Has Hydrtst Conduc Before Ind | No |
| Direct Asmnt Conducted | No |
| Non Destructive Exam Ind | No |
| Preparer Name | P**** G**** R**** |
| Preparer Title | Regulatory Compliance Specialist |
| Preparer Email | P***************@o****.com |
| Preparer Telephone | 5803956238 |
| Prepared Date | 2024-05-13 00:00:00 |
| Local Contact Name | P**** G**** R**** |
| Local Contact Email | P***************@o****.com |
| Local Contact Telephone | 5803956238 |
| Authorizer Name | M*** G****** |
| Authorizer Telephone | 918-588-7382 |
| Authorizer Title | Vp Natrual Gas Liquids Pipelines And Terminals |
| Authorizer Email | M**************@o****.com |
| Narrative | On november 27th, 2023 at 1:15pm the oneok pipeline control center was contacted by an oneok contractor stating frost on the ground in the vicinity of oneok's 6" tecumseh pipeline. The pipeline section was isolated, blocked in, and nitrogen purged. A pinhole leak was found on the pipe and repairs were made by pipe replacement. The removed pipe will be sent to a lab for metallurgical analysis. Results from the analysis will be included in the supplemental report once the investigation is complete. 05/13/24 update: the metallurgical report identified that the leak occurred within a region of external corrosion. Based on examination of the deposits and metallography across the leak, the observed external corrosion occurred in an environment containing water and oxygen due to a trapped environment present beneath disbonded tape coating. Due to the condition of the coating, shielding was present that did not allow cathodic protection current to reach the pipe surface leading to the observed higher corrosion rates. Approximately 10 feet of pipe was replaced at the leak location. |
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