Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2023-04-06 — TX
Operator
Texas Eastern Transmission, Lp (Spectra Energy Partners, Lp)
Cause
Corrosion Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$241,835
Incident datetime
2023-04-06 00:00 UTC
Report number
Location
TX
Narrative
On march 9, 2023, texas eastern transmission, l.P. (tetlp) was conducting an anomaly dig on line 14 clin-kosc vs-4, m.P. 356.89, when the crew identified indications of a leak (I.E., bubbling). A pin hole leak was confirmed with a soap solution at approximately 12:07 ct. At approximately 14:20 ct it was confirmed that repairs would likely exceed the PHMSA damage/repair threshold, and the event was subsequently called into the nrc at 14:47 ct. At approximately 16:50 ct the upstream valve was closed, and the downstream compressor station (clinton) was used to pull the pressure in the line down. At 18:10 ct the downstream valve was closed, and the line was then completely blown down to make the repair. The leaking pipe was cut out and replaced and the line was returned to service on march 12, 2023, 17:20 ct. The removed section was sent to a lab for further metallurgical analysis. Tetlp had assessed the line with an mfl-a tool in early 2021. The anomaly in question was reported as having a 66% depth and was issued a due date of april 30, 2023. Excavation began march 8, 2023, and during the dig process the anomaly was found to be leaking. Further excavation verified that a negative lead to the rectifier had come loose resulting an increased corrosion growth rate under the connection. 06/19/2023 there were no clear indications of a problem in either the rectifier readings or the test lead readings at the rectifier, and there was no additional corrosion damage in the area. The corrosion was concentrated under the loose negative ground bed lead where current was leaving the pipe and returning to the ground bed.
Detailed record list
Report Received Date
2023-04-06 00:00:00
Iyear
2023
Report Number
20230031
Supplemental Number
38186
Report Type
Supplemental Final
Operator Id
19235
Name
Texas Eastern Transmission, Lp (Spectra Energy Partners, Lp)
Operator Street Address
915 North Eldridge Parkway
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77079
Time Zone
Central
Daylight Savings Ind
No
Location Latitude
32.78925848
Location Longitude
-89.78411587
Nrc Rpt Num
1361895
Additional Nrc Report Numbers
1362124
Commodity Released Type
Natural Gas
Unintentional Release
4.101
Intentional Release
13546.07
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Status When Identified
Normal Operation, Includes Pauses During Maintenance
Shutdown Due Accident Ind
Yes
Communication State Fed Ind
Yes
Party Initiated Communication
Local/state/federal Emergency Responder
Ignite Ind
No
Upstream Action Taken
Valve Closure
Downstream Action Taken
Valve Closure
Num Pub Evacuated
0
On Off Shore
Onshore
Onshore State Abbreviation
Ms
Onshore Postal Code
39045
Onshore City Name
Not Within A Municipality
Onshore County Name
Madison
Designated Location
Milepost
Designated Name
356.89
Pipe Fac Name
Texas Eastern Transmission , Lp
Segment Name
Line 14/vs04 Clin-Kosc
Federal
Yes
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Exposed Due To Excavation
Depth Of Cover
24
Other Underground Facilities
No
Crossing
No
Pipe Facility Type
Interstate
System Part Involved
Onshore Pipeline, Including Valve Sites
Item Involved
Pipe
Pipe Type
Pipe Body
Pipe Diameter
30
Puddle Weld Ind
No
Pipe Wall Thickness
0.375
Pipe Smys
52000
Pipe Specification
Api-5l
Pipe Seam Type
Dsaw
Pipe Manufacturer
National Tube Works
Pipe Coating Type
Coal Tar
Coating Applied Ind
Unknown
Installation Year
1955
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Pinhole
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
633
Heat Damage Ind
No
Non Heat Damage Ind
No
Did Occur In Mca Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
10
Est Cost Intentional Release
34407
Est Cost Prop Damage
241835
Est Cost Emergency
500
Est Cost Other
0
Gas Cost In Mcf
2.54
Prpty
276752
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
0
Num Business Building Affctd
0
Wildlife Impact Ind
No
Accident Psig
836
Gas Flow In Pipe In Mcf
463330
Mop Psig
936
Mop Cfr Section
192.619(A)(1)
Maop Established Date
2013-02-04 00:00:00
Maop Reversal Flow Ind
Bi-Directional
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Gas Required Odorized Ind
No
Upstream Valve Type Ind
Manual
Downstream Valve Type Ind
Manual
Length Segment Isolated
63624
Internal Inspection Ind
Yes
Operation Complications Ind
No
Pipeline Function
Transmission System
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
No
Scada Conf Ind
No
Accident Identifier
Local Operating Personnel, Including Contractors
Operator Type
Contractor Working For The Operator
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
The leak was not of a size large enough to be identified through scada.
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
Negative Rectifier Header Lead Came Loose Resulting In Localized Corrosion Beneath The Connection.
Field Exam Basis Ind
Yes
Underground Location
Yes
Under Cathodic Protection Ind
Yes
Cathodic Pro Start Year
1955
Shielding Evident
No
Cathodic Survey Type
Yes
Cp Annual Survey Ind
Yes
Close Interval Survey Ind
Yes
Cp Annual Survey Year
2022
Close Interval Survey Year
2015
Prior Damage
No
Collected Data Ind
Yes
Axial Magnetic Flx Lkg Ind
Yes
Cir Trn Wave Mgn Flx Lkg Ind
Yes
Geometry Deformation Ind
Yes
Emat Ind
Yes
Other Tool Tech Ind
Yes
Axial Recent Year
2021
Axial Rcnt Propul Method
Free Swimming
Axial Rcnt Attuned Detect
Metal Loss
Axial Rcnt Atnd Dtct Metal
High Resolution
Axial Previous Year
2014
Axial Prev Propul Method
Free Swimming
Axial Prev Attuned Detect
Metal Loss
Axial Prev Atnd Dtct Metal
High Resolution
Circ Wave Recent Year
2020
Circ Wv Rcnt Propul Method
Free Swimming
Circ Wv Rcnt Resolution
High Resolution
Geometry Recent Year
2022
Geometry Rcnt Propul Method
Free Swimming
Geometry Rcnt Resolution
High Resolution
Geometrt Rcnt Measur Cups
No Cups
Geometry Previous Year
2021
Geometry Prev Propul Method
Free Swimming
Geometry Prev Resolution
High Resolution
Geometrt Prev Measur Cups
No Cups
Emat Recent Year
2020
Emat Rcnt Propul Method
Free Swimming
Other Tool
Imu
Other Recent Year
2022
Other Rcnt Propul Method
Free Swimming
Other Previous Year
2021
Other Prev Propul Method
Free Swimming
Has Hydrtst Conduc Before Ind
Yes
Hydrtst Most Rcnt Year
1955
Hydrtst Most Rcnt Pressure
1266
Direct Asmnt Conducted
No
Non Destructive Exam Ind
No
Preparer Name
M****** M******
Preparer Email
M**************@e*******.com
Preparer Telephone
6128056542
Authorizer Name
G***** W*****
Authorizer Title
Director Operational Excellence
Authorizer Telephone
7136275008
Authorizer Email
G*************@e*******.com
Narrative
On march 9, 2023, texas eastern transmission, l.P. (tetlp) was conducting an anomaly dig on line 14 clin-kosc vs-4, m.P. 356.89, when the crew identified indications of a leak (I.E., bubbling). A pin hole leak was confirmed with a soap solution at approximately 12:07 ct. At approximately 14:20 ct it was confirmed that repairs would likely exceed the PHMSA damage/repair threshold, and the event was subsequently called into the nrc at 14:47 ct. At approximately 16:50 ct the upstream valve was closed, and the downstream compressor station (clinton) was used to pull the pressure in the line down. At 18:10 ct the downstream valve was closed, and the line was then completely blown down to make the repair. The leaking pipe was cut out and replaced and the line was returned to service on march 12, 2023, 17:20 ct. The removed section was sent to a lab for further metallurgical analysis. Tetlp had assessed the line with an mfl-a tool in early 2021. The anomaly in question was reported as having a 66% depth and was issued a due date of april 30, 2023. Excavation began march 8, 2023, and during the dig process the anomaly was found to be leaking. Further excavation verified that a negative lead to the rectifier had come loose resulting an increased corrosion growth rate under the connection. 06/19/2023 there were no clear indications of a problem in either the rectifier readings or the test lead readings at the rectifier, and there was no additional corrosion damage in the area. The corrosion was concentrated under the loose negative ground bed lead where current was leaving the pipe and returning to the ground bed.
| Report Received Date | 2023-04-06 00:00:00 |
|---|---|
| Iyear | 2023 |
| Report Number | 20230031 |
| Supplemental Number | 38186 |
| Report Type | Supplemental Final |
| Operator Id | 19235 PHMSA Enforcement |
| Name | Texas Eastern Transmission, Lp (Spectra Energy Partners, Lp) |
| Operator Street Address | 915 North Eldridge Parkway |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77079 |
| Time Zone | Central |
| Daylight Savings Ind | No |
| Location Latitude | 32.78925848 Google Maps OpenStreetMap |
| Location Longitude | -89.78411587 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1361895 NRC Report How to search |
| Additional Nrc Report Numbers | 1362124 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 4.101 |
| Intentional Release | 13546.07 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Status When Identified | Normal Operation, Includes Pauses During Maintenance |
| Shutdown Due Accident Ind | Yes |
| Communication State Fed Ind | Yes |
| Party Initiated Communication | Local/state/federal Emergency Responder |
| Ignite Ind | No |
| Upstream Action Taken | Valve Closure |
| Downstream Action Taken | Valve Closure |
| Num Pub Evacuated | 0 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Ms |
| Onshore Postal Code | 39045 |
| Onshore City Name | Not Within A Municipality |
| Onshore County Name | Madison |
| Designated Location | Milepost |
| Designated Name | 356.89 |
| Pipe Fac Name | Texas Eastern Transmission , Lp |
| Segment Name | Line 14/vs04 Clin-Kosc |
| Federal | Yes |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Exposed Due To Excavation |
| Depth Of Cover | 24 |
| Other Underground Facilities | No |
| Crossing | No |
| Pipe Facility Type | Interstate |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Pipe Diameter | 30 |
| Puddle Weld Ind | No |
| Pipe Wall Thickness | 0.375 |
| Pipe Smys | 52000 |
| Pipe Specification | Api-5l |
| Pipe Seam Type | Dsaw |
| Pipe Manufacturer | National Tube Works |
| Pipe Coating Type | Coal Tar |
| Coating Applied Ind | Unknown |
| Installation Year | 1955 |
| Manufactured Year | Unknown |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Pinhole |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 633 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Did Occur In Mca Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 10 |
| Est Cost Intentional Release | 34407 |
| Est Cost Prop Damage | 241835 |
| Est Cost Emergency | 500 |
| Est Cost Other | 0 |
| Gas Cost In Mcf | 2.54 |
| Prpty | 276752 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 0 |
| Num Business Building Affctd | 0 |
| Wildlife Impact Ind | No |
| Accident Psig | 836 |
| Gas Flow In Pipe In Mcf | 463330 |
| Mop Psig | 936 |
| Mop Cfr Section | 192.619(A)(1) View CFR 49 §192 |
| Maop Established Date | 2013-02-04 00:00:00 |
| Maop Reversal Flow Ind | Bi-Directional |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | No |
| Gas Required Odorized Ind | No |
| Upstream Valve Type Ind | Manual |
| Downstream Valve Type Ind | Manual |
| Length Segment Isolated | 63624 |
| Internal Inspection Ind | Yes |
| Operation Complications Ind | No |
| Pipeline Function | Transmission System |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | No |
| Scada Conf Ind | No |
| Accident Identifier | Local Operating Personnel, Including Contractors |
| Operator Type | Contractor Working For The Operator |
| 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 | The leak was not of a size large enough to be identified through scada. |
| 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 | Negative Rectifier Header Lead Came Loose Resulting In Localized Corrosion Beneath The Connection. |
| Field Exam Basis Ind | Yes |
| Underground Location | Yes |
| Under Cathodic Protection Ind | Yes |
| Cathodic Pro Start Year | 1955 |
| Shielding Evident | No |
| Cathodic Survey Type | Yes |
| Cp Annual Survey Ind | Yes |
| Close Interval Survey Ind | Yes |
| Cp Annual Survey Year | 2022 |
| Close Interval Survey Year | 2015 |
| Prior Damage | No |
| Collected Data Ind | Yes |
| Axial Magnetic Flx Lkg Ind | Yes |
| Cir Trn Wave Mgn Flx Lkg Ind | Yes |
| Geometry Deformation Ind | Yes |
| Emat Ind | Yes |
| Other Tool Tech Ind | Yes |
| Axial Recent Year | 2021 |
| Axial Rcnt Propul Method | Free Swimming |
| Axial Rcnt Attuned Detect | Metal Loss |
| Axial Rcnt Atnd Dtct Metal | High Resolution |
| Axial Previous Year | 2014 |
| Axial Prev Propul Method | Free Swimming |
| Axial Prev Attuned Detect | Metal Loss |
| Axial Prev Atnd Dtct Metal | High Resolution |
| Circ Wave Recent Year | 2020 |
| Circ Wv Rcnt Propul Method | Free Swimming |
| Circ Wv Rcnt Resolution | High Resolution |
| Geometry Recent Year | 2022 |
| Geometry Rcnt Propul Method | Free Swimming |
| Geometry Rcnt Resolution | High Resolution |
| Geometrt Rcnt Measur Cups | No Cups |
| Geometry Previous Year | 2021 |
| Geometry Prev Propul Method | Free Swimming |
| Geometry Prev Resolution | High Resolution |
| Geometrt Prev Measur Cups | No Cups |
| Emat Recent Year | 2020 |
| Emat Rcnt Propul Method | Free Swimming |
| Other Tool | Imu |
| Other Recent Year | 2022 |
| Other Rcnt Propul Method | Free Swimming |
| Other Previous Year | 2021 |
| Other Prev Propul Method | Free Swimming |
| Has Hydrtst Conduc Before Ind | Yes |
| Hydrtst Most Rcnt Year | 1955 |
| Hydrtst Most Rcnt Pressure | 1266 |
| Direct Asmnt Conducted | No |
| Non Destructive Exam Ind | No |
| Preparer Name | M****** M****** |
| Preparer Email | M**************@e*******.com |
| Preparer Telephone | 6128056542 |
| Authorizer Name | G***** W***** |
| Authorizer Title | Director Operational Excellence |
| Authorizer Telephone | 7136275008 |
| Authorizer Email | G*************@e*******.com |
| Narrative | On march 9, 2023, texas eastern transmission, l.P. (tetlp) was conducting an anomaly dig on line 14 clin-kosc vs-4, m.P. 356.89, when the crew identified indications of a leak (I.E., bubbling). A pin hole leak was confirmed with a soap solution at approximately 12:07 ct. At approximately 14:20 ct it was confirmed that repairs would likely exceed the PHMSA damage/repair threshold, and the event was subsequently called into the nrc at 14:47 ct. At approximately 16:50 ct the upstream valve was closed, and the downstream compressor station (clinton) was used to pull the pressure in the line down. At 18:10 ct the downstream valve was closed, and the line was then completely blown down to make the repair. The leaking pipe was cut out and replaced and the line was returned to service on march 12, 2023, 17:20 ct. The removed section was sent to a lab for further metallurgical analysis. Tetlp had assessed the line with an mfl-a tool in early 2021. The anomaly in question was reported as having a 66% depth and was issued a due date of april 30, 2023. Excavation began march 8, 2023, and during the dig process the anomaly was found to be leaking. Further excavation verified that a negative lead to the rectifier had come loose resulting an increased corrosion growth rate under the connection. 06/19/2023 there were no clear indications of a problem in either the rectifier readings or the test lead readings at the rectifier, and there was no additional corrosion damage in the area. The corrosion was concentrated under the loose negative ground bed lead where current was leaving the pipe and returning to the ground bed. |
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