Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2020-07-14 — 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)
$150,000
Incident datetime
2020-07-14 16:46
Report number
Location
OK
Narrative
On 7/14/2020, a third-party contract crew performing pipeline inspections discovered a vapor release coming from a casing vent riser on the 11107 pipeline at the route 30 crossing in joliet, il (41.58275 -88.16556). At the time the leak was discovered, the pipeline contained propane but was not flowing. Post discovery, block valves were manually shut and the pipeline was nitrogen purged and depressured to facilitate the repair. Once the location was excavated, a pinhole was confirmed just inside the end of the casing. A 10 foot section of pipeline, which included the pinhole, was cut-out and replaced, and the pipeline was placed back in service on 7/18/20. The pipeline section containing the pinhole has been sent for metallurgical lab analysis to determine cause of the failure. An nrc report (#281895) was submitted on 7/14/20 due to repairs estimated over $50,000. Updated 11/5/2020 - brent theede the results of the metallurgical analysis indicate that the metallurgical cause of the leak was ac stray current corrosion. This conclusion is based on a number of observations, including: the association of the failure with a well-coated pipe segment, the morphology of the pit, the composition of the corrosion products, and the ph of the deposits at the leak.
Detailed record list
Report Received Date
2020-07-31 00:00:00
Iyear
2020
Report Number
20200219
Supplemental Number
34535
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
Local Datetime
2020-07-14 16:46:00
Location Latitude
41.58275
Location Longitude
-88.16556
Commodity Released Type
Hvl Or Other Flammable Or Toxic Fluid Which Is A Gas At Ambient Conditions
Commodity Subtype
Other Hvl
Commodity Details
Propane
Unintentional Release Bbls
2.5
Intentional Release Bbls
0
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
Incident Identified Datetime
2020-07-14 16:46:00
System Part Involved
Onshore Pipeline, Including Valve Sites
On Off Shore
Onshore
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2020-07-14 16:46:00
Restart Datetime
2020-07-18 22:00:00
On Site Datetime
2020-07-14 16:46:00
Nrc Rpt Datetime
2020-07-14 17:32:00
Nrc Rpt Num
1281895
Ignite Ind
No
Explode Ind
No
Upstream Valve Type Ind
Manual
Downstream Valve Type Ind
Manual
Num Pub Evacuated
0
Pipe Fac Name
Morris Storage To Lemont Storage
Segment Name
11107
Onshore State Abbreviation
Il
Onshore Postal Code
60435
Onshore City Name
Joliet
Onshore County Name
Will
Designated Location
Milepost/valve Station
Designated Name
16.78
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
72
Crossing
Yes
Road Crossing Ind
Yes
Road Type
Cased
Pipe Facility Type
Interstate
Item Involved
Pipe
Pipe Type
Pipe Body
Pipe Diameter
10
Pipe Wall Thickness
0.25
Pipe Smys
52000
Pipe Specification
Api 5l
Pipe Seam Type
Erw - High Frequency
Pipe Manufacturer
Unknown
Pipe Coating Type
Coal Tar
Installation Year
1971
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
Yes
High Pop Ind
Yes
High Pop Yes No
Yes
Usa Drinking Ind
Yes
Usa Drinking Yes No
No
Est Cost Oper Paid
0
Est Cost Gas Released
50
Est Cost Prop Damage
150000
Est Cost Emergency
1500
Est Cost Environmental
0
Est Cost Other
2500
Est Cost Other Details
Investigation And Metallurgical Analysis
Prpty
154050
Accident Psig
137
Mop Psig
1740
Accident Pressure
Pressure Did Not Exceed Mop
Pressure Restriction Ind
No
Length Segment Isolated
106022
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 were completed in association with this leak.
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
Stray Current Corrosion Ind
Yes
Metallurgical Basis Ind
Yes
Underground Location
Yes
Under Cathodic Protection Ind
Yes
Cathodic Pro Start Year
Unknown
Shielding Evident
Yes
Cathodic Survey Type
Yes
Cp Annual Survey Ind
Yes
Close Interval Survey Ind
Yes
Cp Annual Survey Year
2020
Close Interval Survey Year
2018
Prior Damage
Yes
Collected Data Ind
Yes
Axial Magnetic Flx Lkg Ind
Yes
Geometry Deformation Ind
Yes
Axial Recent Year
2019
Geometry Recent Year
2019
Has Hydrtst Conduc Before Ind
No
Direct Asmnt Conducted
No
Non Destructive Exam Ind
No
Preparer Name
B**** T*****
Preparer Title
Regulatory Compliance Specialist
Preparer Email
B***********@o****.com
Preparer Telephone
620-820-3047
Prepared Date
2020-11-16 00:00:00
Authorizer Name
W***** A****
Authorizer Telephone
918-591-5081
Authorizer Title
Vp Natural Gas Pipelines And Terminals
Authorizer Email
W***********@o****.com
Narrative
On 7/14/2020, a third-party contract crew performing pipeline inspections discovered a vapor release coming from a casing vent riser on the 11107 pipeline at the route 30 crossing in joliet, il (41.58275 -88.16556). At the time the leak was discovered, the pipeline contained propane but was not flowing. Post discovery, block valves were manually shut and the pipeline was nitrogen purged and depressured to facilitate the repair. Once the location was excavated, a pinhole was confirmed just inside the end of the casing. A 10 foot section of pipeline, which included the pinhole, was cut-out and replaced, and the pipeline was placed back in service on 7/18/20. The pipeline section containing the pinhole has been sent for metallurgical lab analysis to determine cause of the failure. An nrc report (#281895) was submitted on 7/14/20 due to repairs estimated over $50,000. Updated 11/5/2020 - brent theede the results of the metallurgical analysis indicate that the metallurgical cause of the leak was ac stray current corrosion. This conclusion is based on a number of observations, including: the association of the failure with a well-coated pipe segment, the morphology of the pit, the composition of the corrosion products, and the ph of the deposits at the leak.
| Report Received Date | 2020-07-31 00:00:00 |
|---|---|
| Iyear | 2020 |
| Report Number | 20200219 |
| Supplemental Number | 34535 |
| 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 |
| Local Datetime | 2020-07-14 16:46:00 |
| Location Latitude | 41.58275 Google Maps OpenStreetMap |
| Location Longitude | -88.16556 Google Maps OpenStreetMap |
| Commodity Released Type | Hvl Or Other Flammable Or Toxic Fluid Which Is A Gas At Ambient Conditions |
| Commodity Subtype | Other Hvl |
| Commodity Details | Propane |
| Unintentional Release Bbls | 2.5 |
| Intentional Release Bbls | 0 |
| 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 |
| Incident Identified Datetime | 2020-07-14 16:46:00 |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| On Off Shore | Onshore |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2020-07-14 16:46:00 |
| Restart Datetime | 2020-07-18 22:00:00 |
| On Site Datetime | 2020-07-14 16:46:00 |
| Nrc Rpt Datetime | 2020-07-14 17:32:00 |
| Nrc Rpt Num | 1281895 NRC Report How to search |
| Ignite Ind | No |
| Explode Ind | No |
| Upstream Valve Type Ind | Manual |
| Downstream Valve Type Ind | Manual |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Morris Storage To Lemont Storage |
| Segment Name | 11107 |
| Onshore State Abbreviation | Il |
| Onshore Postal Code | 60435 |
| Onshore City Name | Joliet |
| Onshore County Name | Will |
| Designated Location | Milepost/valve Station |
| Designated Name | 16.78 |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 72 |
| Crossing | Yes |
| Road Crossing Ind | Yes |
| Road Type | Cased |
| Pipe Facility Type | Interstate |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Pipe Diameter | 10 |
| Pipe Wall Thickness | 0.25 |
| Pipe Smys | 52000 |
| Pipe Specification | Api 5l |
| Pipe Seam Type | Erw - High Frequency |
| Pipe Manufacturer | Unknown |
| Pipe Coating Type | Coal Tar |
| Installation Year | 1971 |
| 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 | Yes |
| High Pop Ind | Yes |
| High Pop Yes No | Yes |
| Usa Drinking Ind | Yes |
| Usa Drinking Yes No | No |
| Est Cost Oper Paid | 0 |
| Est Cost Gas Released | 50 |
| Est Cost Prop Damage | 150000 |
| Est Cost Emergency | 1500 |
| Est Cost Environmental | 0 |
| Est Cost Other | 2500 |
| Est Cost Other Details | Investigation And Metallurgical Analysis |
| Prpty | 154050 |
| Accident Psig | 137 |
| Mop Psig | 1740 |
| Accident Pressure | Pressure Did Not Exceed Mop |
| Pressure Restriction Ind | No |
| Length Segment Isolated | 106022 |
| 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 were completed in association with this leak. |
| 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 |
| Stray Current Corrosion Ind | Yes |
| Metallurgical Basis Ind | Yes |
| Underground Location | Yes |
| Under Cathodic Protection Ind | Yes |
| Cathodic Pro Start Year | Unknown |
| Shielding Evident | Yes |
| Cathodic Survey Type | Yes |
| Cp Annual Survey Ind | Yes |
| Close Interval Survey Ind | Yes |
| Cp Annual Survey Year | 2020 |
| Close Interval Survey Year | 2018 |
| Prior Damage | Yes |
| Collected Data Ind | Yes |
| Axial Magnetic Flx Lkg Ind | Yes |
| Geometry Deformation Ind | Yes |
| Axial Recent Year | 2019 |
| Geometry Recent Year | 2019 |
| Has Hydrtst Conduc Before Ind | No |
| Direct Asmnt Conducted | No |
| Non Destructive Exam Ind | No |
| Preparer Name | B**** T***** |
| Preparer Title | Regulatory Compliance Specialist |
| Preparer Email | B***********@o****.com |
| Preparer Telephone | 620-820-3047 |
| Prepared Date | 2020-11-16 00:00:00 |
| Authorizer Name | W***** A**** |
| Authorizer Telephone | 918-591-5081 |
| Authorizer Title | Vp Natural Gas Pipelines And Terminals |
| Authorizer Email | W***********@o****.com |
| Narrative | On 7/14/2020, a third-party contract crew performing pipeline inspections discovered a vapor release coming from a casing vent riser on the 11107 pipeline at the route 30 crossing in joliet, il (41.58275 -88.16556). At the time the leak was discovered, the pipeline contained propane but was not flowing. Post discovery, block valves were manually shut and the pipeline was nitrogen purged and depressured to facilitate the repair. Once the location was excavated, a pinhole was confirmed just inside the end of the casing. A 10 foot section of pipeline, which included the pinhole, was cut-out and replaced, and the pipeline was placed back in service on 7/18/20. The pipeline section containing the pinhole has been sent for metallurgical lab analysis to determine cause of the failure. An nrc report (#281895) was submitted on 7/14/20 due to repairs estimated over $50,000. Updated 11/5/2020 - brent theede the results of the metallurgical analysis indicate that the metallurgical cause of the leak was ac stray current corrosion. This conclusion is based on a number of observations, including: the association of the failure with a well-coated pipe segment, the morphology of the pit, the composition of the corrosion products, and the ph of the deposits at the leak. |
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