Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2013-03-15 — TX
Operator
Tennessee Gas Pipeline Company
Cause
Corrosion Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$426,159
Incident datetime
2013-03-15 17:15
Report number
Location
TX
Narrative
Tennessee gas pipeline (tgp) was notified by the bureau of safety and environmental enforcement (bsee) that bubbles and about a 1 mile long sheen were visible in the vacinity of tgp's 24" line 523m-3700 on the ocs in eugene island block 241. Tgp investigated and confirmed the location of the bubbles and sheen. The only producer flowing into the pipeline was immediately shut-in. Divers were sent close a 30x24 subsea valve in order to reduce the pipeline pressure before evaluating the leak location but were delayed by weather from diving and completing this task until march 17. An additional check valve was to be pinned before commencing repair of the leak but the divers had to return to shore on march 21 due to bad weather. On march 27 the divers returned to the leak location and were able to excavate the pipe, remove the coating and install a leak clamp to complete the repair. The clamp installation was completed on march 29 and the pipeline then returned to service.
Detailed record list
Report Received Date
2013-04-11 00:00:00
Iyear
2013
Report Number
20130030
Supplemental Number
16330
Report Type
Supplemental Final
Operator Id
19160
Name
Tennessee Gas Pipeline Company
Operator Street Address
1001 Louisiana St
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77002
Local Datetime
2013-03-15 17:15:00
Location Latitude
28.551
Location Longitude
-91.67917
Nrc Rpt Num
1041182
Nrc Rpt Datetime
2013-03-15 18:15:00
Commodity Released Type
Natural Gas
Unintentional Release
100
Intentional Release
6011
Accompanying Liquid
1
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2013-03-15 17:30:00
Restart Datetime
2013-03-29 19:00:00
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Incident Identified Datetime
2013-03-15 17:15:00
On Site Datetime
2013-03-16 22:20:00
On Off Shore
Offshore
Off Water Depth
146
Off Accident Origin
On The Outer Continental Shelf (Ocs)
Off Ocs Area
Eugene Island
Off Ocs Block
241
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
24
Pipe Wall Thickness
0.438
Pipe Smys
60000
Pipe Specification
Api-5l
Pipe Seam Type
Dsaw
Pipe Manufacturer
Bethlehem
Pipe Coating Type
Other
Pipe Coating Details
Concrete
Manufactured Year
1975
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Pinhole
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
588
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
382
Est Cost Intentional Release
22979
Est Cost Prop Damage
426159
Est Cost Emergency
0
Est Cost Other
0
Prpty
449520
Accident Psig
863
Mop Psig
1260
Mop Cfr Section
Not On Omb-Approved Form When Submitted
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Upstream Valve Type Ind
Manual
Downstream Valve Type Ind
Manual
Length Segment Isolated
25872
Internal Inspection Ind
No
Diameter Change Ind
Yes
Operation Complications Ind
Yes
Low Flow Ind
Yes
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
Other
Accident Details
Bureau Of Safety And Environmental Enforcement Notification
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 pressures were within normal operating range with no abnormal pressure excursions.
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
Not Cut Open
Int Other Corrosion Ind
Yes
Int Corrosion Type Details
Suspected To Be Microbiologically Induced Based Upon Company's Knowledge Related To The Aspects Of Internal Corrosion.
Int Other Basis Ind
Yes
Int Corrosion Basis Details
See Response To Item 7.
Int Low Point Pipe Loc Ind
Yes
Corrosion Inhibitors
Yes
Corrosion Lining
No
Cleaning Dewatering
No
Corrosion Coupons
No
Collected Data Ind
No
Has Hydrtst Conduc Before Ind
No
Direct Asmnt Conducted
No
Non Destructive Exam Ind
No
Preparer Name
M***** M******
Preparer Title
Engineer Pipeline
Preparer Email
M*************@k***********.com
Preparer Telephone
713-420-4614
Preparer Fax
713-420-7464
Authorizer Name
M***** M******
Authorizer Title
Engineer Pipeline
Authorizer Telephone
713-420-4614
Authorizer Email
M*************@k***********.com
Narrative
Tennessee gas pipeline (tgp) was notified by the bureau of safety and environmental enforcement (bsee) that bubbles and about a 1 mile long sheen were visible in the vacinity of tgp's 24" line 523m-3700 on the ocs in eugene island block 241. Tgp investigated and confirmed the location of the bubbles and sheen. The only producer flowing into the pipeline was immediately shut-in. Divers were sent close a 30x24 subsea valve in order to reduce the pipeline pressure before evaluating the leak location but were delayed by weather from diving and completing this task until march 17. An additional check valve was to be pinned before commencing repair of the leak but the divers had to return to shore on march 21 due to bad weather. On march 27 the divers returned to the leak location and were able to excavate the pipe, remove the coating and install a leak clamp to complete the repair. The clamp installation was completed on march 29 and the pipeline then returned to service.
| Report Received Date | 2013-04-11 00:00:00 |
|---|---|
| Iyear | 2013 |
| Report Number | 20130030 |
| Supplemental Number | 16330 |
| Report Type | Supplemental Final |
| Operator Id | 19160 PHMSA Enforcement |
| Name | Tennessee Gas Pipeline Company |
| Operator Street Address | 1001 Louisiana St |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77002 |
| Local Datetime | 2013-03-15 17:15:00 |
| Location Latitude | 28.551 Google Maps OpenStreetMap |
| Location Longitude | -91.67917 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1041182 NRC Report How to search |
| Nrc Rpt Datetime | 2013-03-15 18:15:00 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 100 |
| Intentional Release | 6011 |
| Accompanying Liquid | 1 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2013-03-15 17:30:00 |
| Restart Datetime | 2013-03-29 19:00:00 |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2013-03-15 17:15:00 |
| On Site Datetime | 2013-03-16 22:20:00 |
| On Off Shore | Offshore |
| Off Water Depth | 146 |
| Off Accident Origin | On The Outer Continental Shelf (Ocs) |
| Off Ocs Area | Eugene Island |
| Off Ocs Block | 241 |
| 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 | 24 |
| Pipe Wall Thickness | 0.438 |
| Pipe Smys | 60000 |
| Pipe Specification | Api-5l |
| Pipe Seam Type | Dsaw |
| Pipe Manufacturer | Bethlehem |
| Pipe Coating Type | Other |
| Pipe Coating Details | Concrete |
| Manufactured Year | 1975 |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Pinhole |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 588 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 382 |
| Est Cost Intentional Release | 22979 |
| Est Cost Prop Damage | 426159 |
| Est Cost Emergency | 0 |
| Est Cost Other | 0 |
| Prpty | 449520 |
| Accident Psig | 863 |
| Mop Psig | 1260 |
| Mop Cfr Section | Not On Omb-Approved Form When Submitted View CFR 49 §192 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | No |
| Upstream Valve Type Ind | Manual |
| Downstream Valve Type Ind | Manual |
| Length Segment Isolated | 25872 |
| Internal Inspection Ind | No |
| Diameter Change Ind | Yes |
| Operation Complications Ind | Yes |
| Low Flow Ind | Yes |
| 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 | Other |
| Accident Details | Bureau Of Safety And Environmental Enforcement Notification |
| 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 pressures were within normal operating range with no abnormal pressure excursions. |
| 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 | Not Cut Open |
| Int Other Corrosion Ind | Yes |
| Int Corrosion Type Details | Suspected To Be Microbiologically Induced Based Upon Company's Knowledge Related To The Aspects Of Internal Corrosion. |
| Int Other Basis Ind | Yes |
| Int Corrosion Basis Details | See Response To Item 7. |
| Int Low Point Pipe Loc Ind | Yes |
| Corrosion Inhibitors | Yes |
| Corrosion Lining | No |
| Cleaning Dewatering | No |
| Corrosion Coupons | No |
| Collected Data Ind | No |
| Has Hydrtst Conduc Before Ind | No |
| Direct Asmnt Conducted | No |
| Non Destructive Exam Ind | No |
| Preparer Name | M***** M****** |
| Preparer Title | Engineer Pipeline |
| Preparer Email | M*************@k***********.com |
| Preparer Telephone | 713-420-4614 |
| Preparer Fax | 713-420-7464 |
| Authorizer Name | M***** M****** |
| Authorizer Title | Engineer Pipeline |
| Authorizer Telephone | 713-420-4614 |
| Authorizer Email | M*************@k***********.com |
| Narrative | Tennessee gas pipeline (tgp) was notified by the bureau of safety and environmental enforcement (bsee) that bubbles and about a 1 mile long sheen were visible in the vacinity of tgp's 24" line 523m-3700 on the ocs in eugene island block 241. Tgp investigated and confirmed the location of the bubbles and sheen. The only producer flowing into the pipeline was immediately shut-in. Divers were sent close a 30x24 subsea valve in order to reduce the pipeline pressure before evaluating the leak location but were delayed by weather from diving and completing this task until march 17. An additional check valve was to be pinned before commencing repair of the leak but the divers had to return to shore on march 21 due to bad weather. On march 27 the divers returned to the leak location and were able to excavate the pipe, remove the coating and install a leak clamp to complete the repair. The clamp installation was completed on march 29 and the pipeline then returned to service. |
External Resources
PHMSA pipeline safety insights.
Product
Features
Company
All rights reserved. Copyright © by ClearPHMSA