Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2011-07-08 — TX
Operator
Tennessee Gas Pipeline Co (El Paso)
Cause
Corrosion Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$673,214
Incident datetime
2011-07-08 14:45
Report number
Location
TX
Narrative
Boemre observed bubbles and a light sheen in the vicinity of tennesee gas pipeline's (tgp) facilities on the ocs in eugene island block 320. Boemre contacted the coast guard who contacted tgp gas control. The leak was determined to be coming from tgp's 30" 523m-2300 pipeline which was isolated due to pending abandonment and under only 247 psig of gas pressure. Divers determined a pin hole leak to be the cause and repaired with a clamp. Abandonment of the line will proceed. Subsequent to the above july 8, 2011 occurrence, there was a leak from this tgp 523m-2300 pipeline that involved only liquids and resulted in a small sheen on february 3, 2012. There was no gas released. Consequently, pursuant to approval to do so from mr. Gene roberson, PHMSA sw region, this is being noted here and it was assigned nrc no. 1002085.
Detailed record list
Report Received Date
2011-07-29 00:00:00
Iyear
2011
Report Number
20110261
Supplemental Number
16143
Report Type
Supplemental Final
Operator Id
19160
Name
Tennessee Gas Pipeline Co (El Paso)
Operator Street Address
1001 Louisiana St
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77002
Local Datetime
2011-07-08 11:42:00
Location Latitude
28.280666
Location Longitude
-91.429833
Nrc Rpt Num
982085
Nrc Rpt Datetime
2011-07-08 15:05:00
Commodity Released Type
Natural Gas
Unintentional Release
1000
Intentional Release
27544
Accompanying Liquid
0.5
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Shutdown Due Accident Ind
No
Shutdown Explain
Pipeline Was Shut In Due To Planned Abandonment.
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Incident Identified Datetime
2011-07-08 14:45:00
On Site Datetime
2011-07-11 17:45:00
On Off Shore
Offshore
Off Water Depth
244
Off Accident Origin
On The Outer Continental Shelf (Ocs)
Off Ocs Area
Eugene Island
Off Ocs Block
320
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
Weld/fusion, Including Heat-Affected Zone
Pipe Diameter
30
Pipe Wall Thickness
0.562
Pipe Smys
60000
Pipe Specification
Api 5lx
Pipe Seam Type
Dsaw
Pipe Manufacturer
Bethlehem
Pipe Coating Type
Coal Tar
Weld Subtype
Pipe Girth Weld
Installation Year
1975
Manufactured Year
1974
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Pinhole
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
757
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
4000
Est Cost Intentional Release
110178
Est Cost Prop Damage
673214
Est Cost Emergency
3850
Est Cost Other
0
Est Cost Other Details
None.
Prpty
791242
Accident Psig
247
Mop Psig
1250
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
168590
Internal Inspection Ind
No
Other Inspection Ind
Yes
Internal Inspection Details
No Platform Connected, No Launchers/receivers, And Pipe Is To Be Abandoned Due To Hurricane Ike.
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
Boemre Patrol Observed And Contacted Coast Guard Who Contacted Tgp Gas Control.
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 not flowing and pressure was well below maop.
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
Not Determined Due To Imminent Abandonment Of Pipeline, But Suspicion Is Microbiological.
Int Other Basis Ind
Yes
Int Corrosion Basis Details
Not Determined Due To Imminent Abandonment Of Pipeline, But Suspicion Is Microbiological.
Int Other Loc Ind
Yes
Corrosion Location Details
In Heat Affected Zone Of Girth Weld.
Corrosion Inhibitors
Yes
Corrosion Lining
Yes
Cleaning Dewatering
No
Corrosion Coupons
No
Collected Data Ind
No
Has Hydrtst Conduc Before Ind
Yes
Hydrtst Most Rcnt Year
1975
Hydrtst Most Rcnt Pressure
1937
Direct Asmnt Conducted
No
Non Destructive Exam Ind
No
Preparer Name
Z****** R*****
Preparer Title
Engineer - Pipeline
Preparer Email
Z*************@k**********.com
Preparer Telephone
7134206633
Preparer Fax
7134206633
Authorizer Name
Z****** R*****
Authorizer Title
Engineer - Pipeline
Authorizer Telephone
7134206633
Authorizer Email
Z*************@k***********.com
Narrative
Boemre observed bubbles and a light sheen in the vicinity of tennesee gas pipeline's (tgp) facilities on the ocs in eugene island block 320. Boemre contacted the coast guard who contacted tgp gas control. The leak was determined to be coming from tgp's 30" 523m-2300 pipeline which was isolated due to pending abandonment and under only 247 psig of gas pressure. Divers determined a pin hole leak to be the cause and repaired with a clamp. Abandonment of the line will proceed. Subsequent to the above july 8, 2011 occurrence, there was a leak from this tgp 523m-2300 pipeline that involved only liquids and resulted in a small sheen on february 3, 2012. There was no gas released. Consequently, pursuant to approval to do so from mr. Gene roberson, PHMSA sw region, this is being noted here and it was assigned nrc no. 1002085.
| Report Received Date | 2011-07-29 00:00:00 |
|---|---|
| Iyear | 2011 |
| Report Number | 20110261 |
| Supplemental Number | 16143 |
| Report Type | Supplemental Final |
| Operator Id | 19160 PHMSA Enforcement |
| Name | Tennessee Gas Pipeline Co (El Paso) |
| Operator Street Address | 1001 Louisiana St |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77002 |
| Local Datetime | 2011-07-08 11:42:00 |
| Location Latitude | 28.280666 Google Maps OpenStreetMap |
| Location Longitude | -91.429833 Google Maps OpenStreetMap |
| Nrc Rpt Num | 982085 NRC Report How to search |
| Nrc Rpt Datetime | 2011-07-08 15:05:00 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 1000 |
| Intentional Release | 27544 |
| Accompanying Liquid | 0.5 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Shutdown Due Accident Ind | No |
| Shutdown Explain | Pipeline Was Shut In Due To Planned Abandonment. |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2011-07-08 14:45:00 |
| On Site Datetime | 2011-07-11 17:45:00 |
| On Off Shore | Offshore |
| Off Water Depth | 244 |
| Off Accident Origin | On The Outer Continental Shelf (Ocs) |
| Off Ocs Area | Eugene Island |
| Off Ocs Block | 320 |
| 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 | Weld/fusion, Including Heat-Affected Zone |
| Pipe Diameter | 30 |
| Pipe Wall Thickness | 0.562 |
| Pipe Smys | 60000 |
| Pipe Specification | Api 5lx |
| Pipe Seam Type | Dsaw |
| Pipe Manufacturer | Bethlehem |
| Pipe Coating Type | Coal Tar |
| Weld Subtype | Pipe Girth Weld |
| Installation Year | 1975 |
| Manufactured Year | 1974 |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Pinhole |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 757 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 4000 |
| Est Cost Intentional Release | 110178 |
| Est Cost Prop Damage | 673214 |
| Est Cost Emergency | 3850 |
| Est Cost Other | 0 |
| Est Cost Other Details | None. |
| Prpty | 791242 |
| Accident Psig | 247 |
| Mop Psig | 1250 |
| 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 | 168590 |
| Internal Inspection Ind | No |
| Other Inspection Ind | Yes |
| Internal Inspection Details | No Platform Connected, No Launchers/receivers, And Pipe Is To Be Abandoned Due To Hurricane Ike. |
| 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 | Boemre Patrol Observed And Contacted Coast Guard Who Contacted Tgp Gas Control. |
| 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 not flowing and pressure was well below maop. |
| 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 | Not Determined Due To Imminent Abandonment Of Pipeline, But Suspicion Is Microbiological. |
| Int Other Basis Ind | Yes |
| Int Corrosion Basis Details | Not Determined Due To Imminent Abandonment Of Pipeline, But Suspicion Is Microbiological. |
| Int Other Loc Ind | Yes |
| Corrosion Location Details | In Heat Affected Zone Of Girth Weld. |
| Corrosion Inhibitors | Yes |
| Corrosion Lining | Yes |
| Cleaning Dewatering | No |
| Corrosion Coupons | No |
| Collected Data Ind | No |
| Has Hydrtst Conduc Before Ind | Yes |
| Hydrtst Most Rcnt Year | 1975 |
| Hydrtst Most Rcnt Pressure | 1937 |
| Direct Asmnt Conducted | No |
| Non Destructive Exam Ind | No |
| Preparer Name | Z****** R***** |
| Preparer Title | Engineer - Pipeline |
| Preparer Email | Z*************@k**********.com |
| Preparer Telephone | 7134206633 |
| Preparer Fax | 7134206633 |
| Authorizer Name | Z****** R***** |
| Authorizer Title | Engineer - Pipeline |
| Authorizer Telephone | 7134206633 |
| Authorizer Email | Z*************@k***********.com |
| Narrative | Boemre observed bubbles and a light sheen in the vicinity of tennesee gas pipeline's (tgp) facilities on the ocs in eugene island block 320. Boemre contacted the coast guard who contacted tgp gas control. The leak was determined to be coming from tgp's 30" 523m-2300 pipeline which was isolated due to pending abandonment and under only 247 psig of gas pressure. Divers determined a pin hole leak to be the cause and repaired with a clamp. Abandonment of the line will proceed. Subsequent to the above july 8, 2011 occurrence, there was a leak from this tgp 523m-2300 pipeline that involved only liquids and resulted in a small sheen on february 3, 2012. There was no gas released. Consequently, pursuant to approval to do so from mr. Gene roberson, PHMSA sw region, this is being noted here and it was assigned nrc no. 1002085. |
External Resources
PHMSA pipeline safety insights.
Product
Features
Company
All rights reserved. Copyright © by ClearPHMSA