Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2015-03-13 — TX
Operator
Anr Pipeline Co
Cause
Equipment Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$300,000
Incident datetime
2015-03-13 11:22
Report number
Location
TX
Narrative
On 13 march 2015 at 11:22 cdt during a transcanada aviation flight over the gulf of mexico, a potential leak was identified near tc offshore (tco) assets in the outer continental shelf (ocs) eugene island block 200 (ei-200). The leak was reported to transcanada/ anr pipeline, operator for tc offshore, as a bubbling pattern over tco's 737 (20') transmission pipeline near mile post 15.6 (28.69737930, -91.84116430). No sheen or product was observed at the leak location. The nrc was notified of an incident on 13 march 2015 at 12:22 cdt (nrc report #1110549). Following the report of the incident to the national response center, transcanada/anr contacted u.S. Coast guard, bsee, and PHMSA to inform and update the agencies on the incident. While preparing to dispatch an investigation and repair vessel to the site, a pipeline segment of 18.4 miles was isolated and blown down from 830 psig to 200 psig from the valves at south marsh island 76 to eugene island 199. Additionally, anr scheduled aerial patrols to monitor the leak. No sheen or product was documented at the site for the duration of the leak and repair. The repair vessel and contract employees arrived at the incident location on 15 march at 13:27 cdt and begin exposing the pipe for the leak investigation. Following the removal of the cover material, the investigation by the divers determined that the leak was caused by a defect in a body bleed threaded plug valve on a 12-inch side valve. The threaded plug valve on the body bleed was replaced on 16 march at 17:59 cdt. Following the replacement of the threaded plug valve, the line was inspected to confirm the repair and the line and valve were re-covered. No additional leaking was observed and the line was returned to service on 17 march 2015.
Detailed record list
Report Received Date
2015-04-10 00:00:00
Iyear
2015
Report Number
20150048
Supplemental Number
16718
Report Type
Original Final
Operator Id
Name
Anr Pipeline Co
Operator Street Address
700 Louisiana Street Suite 700
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77002
Local Datetime
2015-03-13 11:22:00
Location Latitude
28.6973793
Location Longitude
-91.8411643
Nrc Rpt Num
1110549
Nrc Rpt Datetime
2015-03-13 12:22:00
Commodity Released Type
Natural Gas
Unintentional Release
250
Intentional Release
8700
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2015-03-13 17:27:00
Restart Datetime
2015-03-16 17:59:00
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Incident Identified Datetime
2015-03-13 11:22:00
On Site Datetime
2015-03-15 13:27:00
On Off Shore
Offshore
Off Water Depth
112
Off Accident Origin
On The Outer Continental Shelf (Ocs)
Off Ocs Area
Eugene Island
Off Ocs Block
200
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
Other
Item Involved Details
Threaded Plug
Installation Year
1968
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Pinhole
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
359
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
1350
Est Cost Intentional Release
23500
Est Cost Prop Damage
300000
Est Cost Emergency
0
Est Cost Other
0
Prpty
324850
Accident Psig
830
Mop Psig
1380
Mop Cfr Section
192.619(A)(2)
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Upstream Valve Type Ind
Automatic
Downstream Valve Type Ind
Automatic
Length Segment Isolated
97152
Internal Inspection Ind
No
Diameter Change 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
Air Patrol
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
Small size of the leak
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Equipment Failure
Cause Details
Threaded Connection/coupling Failure
Eq Failure Type
Threaded Connection/coupling Failure
Other Stripped Ind
Threaded Fitting
Additional Defect Ind
Yes
Preparer Name
R**** R* S*****
Preparer Title
Field Compliance Specialist
Preparer Email
R***********@t**********.com
Preparer Telephone
8325702966
Authorizer Name
R***** L******
Authorizer Title
Manager U.s. Regulatory Compliance
Authorizer Telephone
402-332-8122
Authorizer Email
R**********@t**********.com
Narrative
On 13 march 2015 at 11:22 cdt during a transcanada aviation flight over the gulf of mexico, a potential leak was identified near tc offshore (tco) assets in the outer continental shelf (ocs) eugene island block 200 (ei-200). The leak was reported to transcanada/ anr pipeline, operator for tc offshore, as a bubbling pattern over tco's 737 (20') transmission pipeline near mile post 15.6 (28.69737930, -91.84116430). No sheen or product was observed at the leak location. The nrc was notified of an incident on 13 march 2015 at 12:22 cdt (nrc report #1110549). Following the report of the incident to the national response center, transcanada/anr contacted u.S. Coast guard, bsee, and PHMSA to inform and update the agencies on the incident. While preparing to dispatch an investigation and repair vessel to the site, a pipeline segment of 18.4 miles was isolated and blown down from 830 psig to 200 psig from the valves at south marsh island 76 to eugene island 199. Additionally, anr scheduled aerial patrols to monitor the leak. No sheen or product was documented at the site for the duration of the leak and repair. The repair vessel and contract employees arrived at the incident location on 15 march at 13:27 cdt and begin exposing the pipe for the leak investigation. Following the removal of the cover material, the investigation by the divers determined that the leak was caused by a defect in a body bleed threaded plug valve on a 12-inch side valve. The threaded plug valve on the body bleed was replaced on 16 march at 17:59 cdt. Following the replacement of the threaded plug valve, the line was inspected to confirm the repair and the line and valve were re-covered. No additional leaking was observed and the line was returned to service on 17 march 2015.
| Report Received Date | 2015-04-10 00:00:00 |
|---|---|
| Iyear | 2015 |
| Report Number | 20150048 |
| Supplemental Number | 16718 |
| Report Type | Original Final |
| Operator Id | 405 PHMSA Enforcement |
| Name | Anr Pipeline Co |
| Operator Street Address | 700 Louisiana Street Suite 700 |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77002 |
| Local Datetime | 2015-03-13 11:22:00 |
| Location Latitude | 28.6973793 Google Maps OpenStreetMap |
| Location Longitude | -91.8411643 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1110549 NRC Report How to search |
| Nrc Rpt Datetime | 2015-03-13 12:22:00 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 250 |
| Intentional Release | 8700 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2015-03-13 17:27:00 |
| Restart Datetime | 2015-03-16 17:59:00 |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2015-03-13 11:22:00 |
| On Site Datetime | 2015-03-15 13:27:00 |
| On Off Shore | Offshore |
| Off Water Depth | 112 |
| Off Accident Origin | On The Outer Continental Shelf (Ocs) |
| Off Ocs Area | Eugene Island |
| Off Ocs Block | 200 |
| 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 | Other |
| Item Involved Details | Threaded Plug |
| Installation Year | 1968 |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Pinhole |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 359 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 1350 |
| Est Cost Intentional Release | 23500 |
| Est Cost Prop Damage | 300000 |
| Est Cost Emergency | 0 |
| Est Cost Other | 0 |
| Prpty | 324850 |
| Accident Psig | 830 |
| Mop Psig | 1380 |
| Mop Cfr Section | 192.619(A)(2) View CFR 49 §192 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | No |
| Upstream Valve Type Ind | Automatic |
| Downstream Valve Type Ind | Automatic |
| Length Segment Isolated | 97152 |
| Internal Inspection Ind | No |
| Diameter Change 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 | Air Patrol |
| 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 | Small size of the leak |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Equipment Failure |
| Cause Details | Threaded Connection/coupling Failure |
| Eq Failure Type | Threaded Connection/coupling Failure |
| Other Stripped Ind | Threaded Fitting |
| Additional Defect Ind | Yes |
| Preparer Name | R**** R* S***** |
| Preparer Title | Field Compliance Specialist |
| Preparer Email | R***********@t**********.com |
| Preparer Telephone | 8325702966 |
| Authorizer Name | R***** L****** |
| Authorizer Title | Manager U.s. Regulatory Compliance |
| Authorizer Telephone | 402-332-8122 |
| Authorizer Email | R**********@t**********.com |
| Narrative | On 13 march 2015 at 11:22 cdt during a transcanada aviation flight over the gulf of mexico, a potential leak was identified near tc offshore (tco) assets in the outer continental shelf (ocs) eugene island block 200 (ei-200). The leak was reported to transcanada/ anr pipeline, operator for tc offshore, as a bubbling pattern over tco's 737 (20') transmission pipeline near mile post 15.6 (28.69737930, -91.84116430). No sheen or product was observed at the leak location. The nrc was notified of an incident on 13 march 2015 at 12:22 cdt (nrc report #1110549). Following the report of the incident to the national response center, transcanada/anr contacted u.S. Coast guard, bsee, and PHMSA to inform and update the agencies on the incident. While preparing to dispatch an investigation and repair vessel to the site, a pipeline segment of 18.4 miles was isolated and blown down from 830 psig to 200 psig from the valves at south marsh island 76 to eugene island 199. Additionally, anr scheduled aerial patrols to monitor the leak. No sheen or product was documented at the site for the duration of the leak and repair. The repair vessel and contract employees arrived at the incident location on 15 march at 13:27 cdt and begin exposing the pipe for the leak investigation. Following the removal of the cover material, the investigation by the divers determined that the leak was caused by a defect in a body bleed threaded plug valve on a 12-inch side valve. The threaded plug valve on the body bleed was replaced on 16 march at 17:59 cdt. Following the replacement of the threaded plug valve, the line was inspected to confirm the repair and the line and valve were re-covered. No additional leaking was observed and the line was returned to service on 17 march 2015. |
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