Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2017-11-03 — TX
Operator
Denbury Gulf Coast Pipelines, Llc
Cause
Material Failure Of Pipe Or Weld
Commodity
Co2 (Carbon Dioxide)
Program
HL
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$80,000
Incident datetime
2017-11-03 08:30
Report number
Location
TX
Narrative
On 11/3/2017 at 08:30, a denbury employee conducting row patrols for production pipeline reported vapors at ground level over the pipeline row. Pipeline operations was promptly notified and isolation and shutdown was initiated on all denbury pipelines in the affected row. The area surrounding the leak was secured and the release did not result in explosion, fire, death, personal injury, significant property damage, or pollution of any water body, and was confined to the pipeline right of way. At 13:30 on 11/3/2017, the west gwinville CO2 pipeline was isolated from its source (by closing the upstream and downstream valves) and at 14:30 blow down was initiated on the isolated segment. On 11/4/2017 during depressurization, shallow hydro-vac excavation was initiated to assist in determining the source of the leak. Depressurization was completed at 18:30 on 11/4/2017. Upon mechanical excavation on 11/5/2017, a leak indication was observed at 09:30 on the west gwinville CO2 pipeline. An nrc telephonic report was initiated at 10:29 on 11/5/2017. A total length of 66 ft of pipe was exposed, coating removed, and examined by magnetic particle inspection. Upon completion of examination the affected pipeline was removed and replaced with pre-tested pipe on 11/10/2017. X-ray of both welds was accepted. The pipeline was restarted on 11/15/2017 at 10:48 without incident.
Detailed record list
Report Received Date
2017-12-04 00:00:00
Iyear
2017
Report Number
20170396
Supplemental Number
23018
Report Type
Supplemental Final
Operator Id
32545
Name
Denbury Gulf Coast Pipelines, Llc
Operator Street Address
5851 Legacy Circle Suite 1200
Operator City Name
Plano
Operator State Abbreviation
TX
Operator Postal Code
75024
Local Datetime
2017-11-03 08:30:00
Location Latitude
31.5941658
Location Longitude
-90.5269165
Commodity Released Type
Co2 (Carbon Dioxide)
Unintentional Release Bbls
106
Intentional Release Bbls
10292
Recovered Bbls
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Ground Patrol By Operator Or Its Contractor
Operator Type
Operator Employee
Incident Identified Datetime
2017-11-03 08:30:00
System Part Involved
Onshore Pipeline, Including Valve Sites
On Off Shore
Onshore
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2017-11-03 13:30:00
Restart Datetime
2017-11-15 10:48:00
On Site Datetime
2017-11-03 09:00:00
Nrc Rpt Datetime
2017-11-05 10:29:00
Nrc Rpt Num
1195259
Ignite Ind
No
Explode Ind
No
Upstream Valve Type Ind
Manual
Downstream Valve Type Ind
Manual
Num Pub Evacuated
0
Pipe Fac Name
West Gwinville Line
Segment Name
West Gwinville Line
Onshore State Abbreviation
Ms
Onshore Postal Code
39601
Onshore City Name
Not Within A Municipality
Onshore County Name
Lincoln
Designated Location
Milepost/valve Station
Designated Name
Mp 11.86
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
83
Crossing
No
Pipe Facility Type
Interstate
Item Involved
Pipe
Pipe Type
Pipe Body
Pipe Diameter
18
Pipe Wall Thickness
0.312
Pipe Smys
52000
Pipe Specification
Api 5l
Pipe Seam Type
Seamless
Pipe Manufacturer
National Tube
Pipe Coating Type
Coal Tar
Installation Year
1959
Manufactured Year
1959
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Crack
Wildlife Impact Ind
No
Soil Contamination
No
Long Term Assessment
No
Remediation Ind
No
Water Contam Ind
No
Could Be Hca
No
Commodity Reached Hca
No
Est Cost Oper Paid
0
Est Cost Gas Released
16002
Est Cost Prop Damage
80000
Est Cost Emergency
0
Est Cost Environmental
0
Est Cost Other
0
Prpty
96002
Accident Psig
1202
Mop Psig
1297
Accident Pressure
Pressure Did Not Exceed Mop
Pressure Restriction Ind
No
Length Segment Isolated
44528
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
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
Pipeline was operating in a steady state when leak occurred. There were no valve closures or changes in pressure prior to the leak.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Material Failure Of Pipe Or Weld
Cause Details
Environmental Cracking-Related
Metallurgical Ind
Yes
Failure Type
Environmental Cracking-Related
Stress Subtype
Stress Corrosion Cracking
Additional Crack Ind
Yes
Collected Data Ind
Yes
Axial Magnetic Flx Lkg Ind
Yes
Axial Recent Year
2007
Geometry Recent Year
2007
Has Hydrtst Conduc Before Ind
Yes
Hydrtst Most Rcnt Year
2007
Hydrtst Most Rcnt Pressure
1796
Direct Asmnt Conducted
No
Non Destructive Exam Ind
No
Preparer Name
C*** D******
Preparer Title
Regulatory Compliance Specialist
Preparer Email
C***********@d******.com
Preparer Telephone
9726732734
Prepared Date
2018-01-04 00:00:00
Authorizer Name
J*** F**********
Authorizer Telephone
9726732648
Authorizer Title
Svp - Operations Services
Authorizer Email
J***************@d******.com
Narrative
On 11/3/2017 at 08:30, a denbury employee conducting row patrols for production pipeline reported vapors at ground level over the pipeline row. Pipeline operations was promptly notified and isolation and shutdown was initiated on all denbury pipelines in the affected row. The area surrounding the leak was secured and the release did not result in explosion, fire, death, personal injury, significant property damage, or pollution of any water body, and was confined to the pipeline right of way. At 13:30 on 11/3/2017, the west gwinville CO2 pipeline was isolated from its source (by closing the upstream and downstream valves) and at 14:30 blow down was initiated on the isolated segment. On 11/4/2017 during depressurization, shallow hydro-vac excavation was initiated to assist in determining the source of the leak. Depressurization was completed at 18:30 on 11/4/2017. Upon mechanical excavation on 11/5/2017, a leak indication was observed at 09:30 on the west gwinville CO2 pipeline. An nrc telephonic report was initiated at 10:29 on 11/5/2017. A total length of 66 ft of pipe was exposed, coating removed, and examined by magnetic particle inspection. Upon completion of examination the affected pipeline was removed and replaced with pre-tested pipe on 11/10/2017. X-ray of both welds was accepted. The pipeline was restarted on 11/15/2017 at 10:48 without incident.
| Report Received Date | 2017-12-04 00:00:00 |
|---|---|
| Iyear | 2017 |
| Report Number | 20170396 |
| Supplemental Number | 23018 |
| Report Type | Supplemental Final |
| Operator Id | 32545 PHMSA Enforcement |
| Name | Denbury Gulf Coast Pipelines, Llc |
| Operator Street Address | 5851 Legacy Circle Suite 1200 |
| Operator City Name | Plano |
| Operator State Abbreviation | TX |
| Operator Postal Code | 75024 |
| Local Datetime | 2017-11-03 08:30:00 |
| Location Latitude | 31.5941658 Google Maps OpenStreetMap |
| Location Longitude | -90.5269165 Google Maps OpenStreetMap |
| Commodity Released Type | Co2 (Carbon Dioxide) |
| Unintentional Release Bbls | 106 |
| Intentional Release Bbls | 10292 |
| Recovered Bbls | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Ground Patrol By Operator Or Its Contractor |
| Operator Type | Operator Employee |
| Incident Identified Datetime | 2017-11-03 08:30:00 |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| On Off Shore | Onshore |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2017-11-03 13:30:00 |
| Restart Datetime | 2017-11-15 10:48:00 |
| On Site Datetime | 2017-11-03 09:00:00 |
| Nrc Rpt Datetime | 2017-11-05 10:29:00 |
| Nrc Rpt Num | 1195259 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 | West Gwinville Line |
| Segment Name | West Gwinville Line |
| Onshore State Abbreviation | Ms |
| Onshore Postal Code | 39601 |
| Onshore City Name | Not Within A Municipality |
| Onshore County Name | Lincoln |
| Designated Location | Milepost/valve Station |
| Designated Name | Mp 11.86 |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 83 |
| Crossing | No |
| Pipe Facility Type | Interstate |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Pipe Diameter | 18 |
| Pipe Wall Thickness | 0.312 |
| Pipe Smys | 52000 |
| Pipe Specification | Api 5l |
| Pipe Seam Type | Seamless |
| Pipe Manufacturer | National Tube |
| Pipe Coating Type | Coal Tar |
| Installation Year | 1959 |
| Manufactured Year | 1959 |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Crack |
| Wildlife Impact Ind | No |
| Soil Contamination | No |
| Long Term Assessment | No |
| Remediation Ind | No |
| Water Contam Ind | No |
| Could Be Hca | No |
| Commodity Reached Hca | No |
| Est Cost Oper Paid | 0 |
| Est Cost Gas Released | 16002 |
| Est Cost Prop Damage | 80000 |
| Est Cost Emergency | 0 |
| Est Cost Environmental | 0 |
| Est Cost Other | 0 |
| Prpty | 96002 |
| Accident Psig | 1202 |
| Mop Psig | 1297 |
| Accident Pressure | Pressure Did Not Exceed Mop |
| Pressure Restriction Ind | No |
| Length Segment Isolated | 44528 |
| 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 | 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 | Pipeline was operating in a steady state when leak occurred. There were no valve closures or changes in pressure prior to the leak. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Material Failure Of Pipe Or Weld |
| Cause Details | Environmental Cracking-Related |
| Metallurgical Ind | Yes |
| Failure Type | Environmental Cracking-Related |
| Stress Subtype | Stress Corrosion Cracking |
| Additional Crack Ind | Yes |
| Collected Data Ind | Yes |
| Axial Magnetic Flx Lkg Ind | Yes |
| Axial Recent Year | 2007 |
| Geometry Recent Year | 2007 |
| Has Hydrtst Conduc Before Ind | Yes |
| Hydrtst Most Rcnt Year | 2007 |
| Hydrtst Most Rcnt Pressure | 1796 |
| Direct Asmnt Conducted | No |
| Non Destructive Exam Ind | No |
| Preparer Name | C*** D****** |
| Preparer Title | Regulatory Compliance Specialist |
| Preparer Email | C***********@d******.com |
| Preparer Telephone | 9726732734 |
| Prepared Date | 2018-01-04 00:00:00 |
| Authorizer Name | J*** F********** |
| Authorizer Telephone | 9726732648 |
| Authorizer Title | Svp - Operations Services |
| Authorizer Email | J***************@d******.com |
| Narrative | On 11/3/2017 at 08:30, a denbury employee conducting row patrols for production pipeline reported vapors at ground level over the pipeline row. Pipeline operations was promptly notified and isolation and shutdown was initiated on all denbury pipelines in the affected row. The area surrounding the leak was secured and the release did not result in explosion, fire, death, personal injury, significant property damage, or pollution of any water body, and was confined to the pipeline right of way. At 13:30 on 11/3/2017, the west gwinville CO2 pipeline was isolated from its source (by closing the upstream and downstream valves) and at 14:30 blow down was initiated on the isolated segment. On 11/4/2017 during depressurization, shallow hydro-vac excavation was initiated to assist in determining the source of the leak. Depressurization was completed at 18:30 on 11/4/2017. Upon mechanical excavation on 11/5/2017, a leak indication was observed at 09:30 on the west gwinville CO2 pipeline. An nrc telephonic report was initiated at 10:29 on 11/5/2017. A total length of 66 ft of pipe was exposed, coating removed, and examined by magnetic particle inspection. Upon completion of examination the affected pipeline was removed and replaced with pre-tested pipe on 11/10/2017. X-ray of both welds was accepted. The pipeline was restarted on 11/15/2017 at 10:48 without incident. |
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