Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2023-12-08 — TX
Operator
Targa Resources Operating Llc
Cause
Corrosion Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$475,000
Incident datetime
2023-12-08 00:00 UTC
Report number
Location
TX
Narrative
A commercial ship notified the coast guard of a potential release of an unknown material on 11/7/23 @18:00 in gom 29� 19' 22" n 093� 38' 55" w. The coast guard made a nrc notification on 11/7/23 @ 19:29 reporting the unknown material and unknown responsible party. Coast guard notified targa of the potential release after a bsee made a flight and provided a listing of pipelines in the area. Targa made a helicopter flight on 11/8/23 and verified the suspected leak was above the pelican 12" offshore gathering pipeline. Sheen and bubbles were observed, and targa began to shut down the pipeline by having the single producer on the pipeline close the valve at the platform. Targa utilized a flare onshore to de-pressure the pipeline. A vessel and dive crew were secured to find and repair the leak. The leak was discovered on 11/16/23 and the crew began the process to expose the pipe and remove the concrete coating. Leak was eliminated and repaired by installation of a 12" x 24" clamp on 11/19/23. Weather delays were experienced throughout the process. A pinhole leak was discovered and determined to be caused by internal corrosion. The pelican pipeline is still shut-in and will not be returned to service. Targa is preparing the permitting application to initiate the pipeline abandonment process with bsee.
Detailed record list
Report Received Date
2023-12-08 00:00:00
Iyear
2023
Report Number
20230114
Supplemental Number
39060
Report Type
Supplemental Final
Operator Id
32296
Name
Targa Resources Operating Llc
Operator Street Address
811 Louisiana St Suite 2100
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77002
Time Zone
Central
Daylight Savings Ind
No
Location Latitude
29.3227778
Location Longitude
-93.6483333
Nrc Rpt Num
1383774
Additional Nrc Report Numbers
1383727, 1383959
Commodity Released Type
Natural Gas
Unintentional Release
1779
Intentional Release
4477
Accompanying Liquid
0.25
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Status When Identified
Normal Operation, Includes Pauses During Maintenance
Shutdown Due Accident Ind
Yes
Still Shutdown Ind
Yes
Ignite Ind
No
Upstream Action Taken
Valve Closure
Downstream Action Taken
Operational Control
Downstream Oprtnl Cntrl Detail
Utilized Flare
Num Pub Evacuated
0
On Off Shore
Offshore
Pipe Fac Name
Pelican Pipeline
Segment Name
Bsee Segment 0001540
Off Water Depth
60
Off Accident Origin
On The Outer Continental Shelf (Ocs)
Ocs Type
Ocs-Gulf Of Mexico
Off Ocs Area
Wc
Off Ocs Block
165
Off Area Accident Type
Below Water, Pipe Buried Or Jetted Below Seabed
Pipe Facility Type
Interstate
System Part Involved
Offshore Pipeline, Including Riser And Riser Bend
Item Involved
Pipe
Pipe Type
Pipe Body
Pipe Diameter
12.75
Puddle Weld Ind
No
Pipe Wall Thickness
0.312
Pipe Smys
52000
Pipe Specification
Api 5l
Pipe Seam Type
Longitudinal Erw - Low Frequency
Pipe Manufacturer
Unknown
Pipe Coating Type
Other
Pipe Coating Details
Concrete Outer Coating
Coating Applied Ind
No
Installation Year
1969
Manufactured Year
1969
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Pinhole
Class Location Type
Class 1 Location
Could Be Hca
No
Not Flammable Ind
Not Flammable
Heat Damage Ind
No
Non Heat Damage Ind
No
Did Occur In Mca Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
4448
Est Cost Intentional Release
11193
Est Cost Prop Damage
475000
Est Cost Emergency
18000
Est Cost Other
0
Est Cost Other Details
Cost Includes Helicopter Flights, Diving Crew And Vessel, Clamp Repair
Gas Cost In Mcf
2.5
Prpty
508641
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
850
Gas Flow In Pipe In Mcf
2
Mop Psig
1300
Mop Cfr Section
192.619(A)(2)
Maop Established Date
1970-01-19 00:00:00
Maop Reversal Flow Ind
No
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Gas Required Odorized Ind
No
Upstream Valve Type Ind
Manual
Length Segment Isolated
211000
Internal Inspection Ind
No
Other Inspection Ind
Yes
Internal Inspection Details
Gathering Line
Operation Complications Ind
Yes
Other Complications Ind
Yes
Inspect Comp Details
No Trap On Platform
Pipeline Function
Offshore Gathering
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
No
Scada Conf Ind
No
Accident Identifier
Notification From Emergency Responder
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
Not detected by scada or control room
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 Corrosive Commodity Ind
Yes
Int Field Exam 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
No
Preparer Name
A***** G***** J*
Preparer Title
Manager Pipeline Compliance
Preparer Email
A************@t*************.com
Preparer Telephone
8325621480
Authorizer Name
A***** G***** J*
Authorizer Title
Manager Pipeline Compliance
Authorizer Telephone
8325621480
Authorizer Email
A************@t*************.com
Narrative
A***************************************************************************************************@18:00 in gom 29� 19' 22" n 093� 38' 55" w. The coast guard made a nrc notification on 11/7/23 @ 19:29 reporting the unknown material and unknown responsible party. Coast guard notified targa of the potential release after a bsee made a flight and provided a listing of pipelines in the area. Targa made a helicopter flight on 11/8/23 and verified the suspected leak was above the pelican 12" offshore gathering pipeline. Sheen and bubbles were observed, and targa began to shut down the pipeline by having the single producer on the pipeline close the valve at the platform. Targa utilized a flare onshore to de-pressure the pipeline. A vessel and dive crew were secured to find and repair the leak. The leak was discovered on 11/16/23 and the crew began the process to expose the pipe and remove the concrete coating. Leak was eliminated and repaired by installation of a 12" x 24" clamp on 11/19/23. Weather delays were experienced throughout the process. A pinhole leak was discovered and determined to be caused by internal corrosion. The pelican pipeline is still shut-in and will not be returned to service. ****************************************************************************************************.
| Report Received Date | 2023-12-08 00:00:00 |
|---|---|
| Iyear | 2023 |
| Report Number | 20230114 |
| Supplemental Number | 39060 |
| Report Type | Supplemental Final |
| Operator Id | 32296 PHMSA Enforcement |
| Name | Targa Resources Operating Llc |
| Operator Street Address | 811 Louisiana St Suite 2100 |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77002 |
| Time Zone | Central |
| Daylight Savings Ind | No |
| Location Latitude | 29.3227778 Google Maps OpenStreetMap |
| Location Longitude | -93.6483333 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1383774 NRC Report How to search |
| Additional Nrc Report Numbers | 1383727, 1383959 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 1779 |
| Intentional Release | 4477 |
| Accompanying Liquid | 0.25 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Status When Identified | Normal Operation, Includes Pauses During Maintenance |
| Shutdown Due Accident Ind | Yes |
| Still Shutdown Ind | Yes |
| Ignite Ind | No |
| Upstream Action Taken | Valve Closure |
| Downstream Action Taken | Operational Control |
| Downstream Oprtnl Cntrl Detail | Utilized Flare |
| Num Pub Evacuated | 0 |
| On Off Shore | Offshore |
| Pipe Fac Name | Pelican Pipeline |
| Segment Name | Bsee Segment 0001540 |
| Off Water Depth | 60 |
| Off Accident Origin | On The Outer Continental Shelf (Ocs) |
| Ocs Type | Ocs-Gulf Of Mexico |
| Off Ocs Area | Wc |
| Off Ocs Block | 165 |
| Off Area Accident Type | Below Water, Pipe Buried Or Jetted Below Seabed |
| Pipe Facility Type | Interstate |
| System Part Involved | Offshore Pipeline, Including Riser And Riser Bend |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Pipe Diameter | 12.75 |
| Puddle Weld Ind | No |
| Pipe Wall Thickness | 0.312 |
| Pipe Smys | 52000 |
| Pipe Specification | Api 5l |
| Pipe Seam Type | Longitudinal Erw - Low Frequency |
| Pipe Manufacturer | Unknown |
| Pipe Coating Type | Other |
| Pipe Coating Details | Concrete Outer Coating |
| Coating Applied Ind | No |
| Installation Year | 1969 |
| Manufactured Year | 1969 |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Pinhole |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Not Flammable Ind | Not Flammable |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Did Occur In Mca Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 4448 |
| Est Cost Intentional Release | 11193 |
| Est Cost Prop Damage | 475000 |
| Est Cost Emergency | 18000 |
| Est Cost Other | 0 |
| Est Cost Other Details | Cost Includes Helicopter Flights, Diving Crew And Vessel, Clamp Repair |
| Gas Cost In Mcf | 2.5 |
| Prpty | 508641 |
| 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 | 850 |
| Gas Flow In Pipe In Mcf | 2 |
| Mop Psig | 1300 |
| Mop Cfr Section | 192.619(A)(2) View CFR 49 §192 |
| Maop Established Date | 1970-01-19 00:00:00 |
| Maop Reversal Flow Ind | No |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | No |
| Gas Required Odorized Ind | No |
| Upstream Valve Type Ind | Manual |
| Length Segment Isolated | 211000 |
| Internal Inspection Ind | No |
| Other Inspection Ind | Yes |
| Internal Inspection Details | Gathering Line |
| Operation Complications Ind | Yes |
| Other Complications Ind | Yes |
| Inspect Comp Details | No Trap On Platform |
| Pipeline Function | Offshore Gathering |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | No |
| Scada Conf Ind | No |
| Accident Identifier | Notification From Emergency Responder |
| 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 | Not detected by scada or control room |
| 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 Corrosive Commodity Ind | Yes |
| Int Field Exam 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 | No |
| Preparer Name | A***** G***** J* |
| Preparer Title | Manager Pipeline Compliance |
| Preparer Email | A************@t*************.com |
| Preparer Telephone | 8325621480 |
| Authorizer Name | A***** G***** J* |
| Authorizer Title | Manager Pipeline Compliance |
| Authorizer Telephone | 8325621480 |
| Authorizer Email | A************@t*************.com |
| Narrative | A***************************************************************************************************@18:00 in gom 29� 19' 22" n 093� 38' 55" w. The coast guard made a nrc notification on 11/7/23 @ 19:29 reporting the unknown material and unknown responsible party. Coast guard notified targa of the potential release after a bsee made a flight and provided a listing of pipelines in the area. Targa made a helicopter flight on 11/8/23 and verified the suspected leak was above the pelican 12" offshore gathering pipeline. Sheen and bubbles were observed, and targa began to shut down the pipeline by having the single producer on the pipeline close the valve at the platform. Targa utilized a flare onshore to de-pressure the pipeline. A vessel and dive crew were secured to find and repair the leak. The leak was discovered on 11/16/23 and the crew began the process to expose the pipe and remove the concrete coating. Leak was eliminated and repaired by installation of a 12" x 24" clamp on 11/19/23. Weather delays were experienced throughout the process. A pinhole leak was discovered and determined to be caused by internal corrosion. The pelican pipeline is still shut-in and will not be returned to service. ****************************************************************************************************. |
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