Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2010-11-30 — TX
Operator
Tennessee Gas Pipeline Co (El Paso)
Cause
Material Failure Of Pipe Or Weld
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$52,000
Incident datetime
2010-11-30 14:50
Report number
Location
TX
Narrative
A loud noise was reported to tennessee gas pipeline (tgp) by a member of the general public in the vicinity of tgp pipeline facilities in natchitoches, louisiana. Upon initial investigation, tgp operations personnel found a natural gas leak in the 100-2 pipeline. Visual examination revealed that the leak was coming from a crack in a wrinkle bend. The crack was 1/2" wide and propagated for a length of 50.5" around the circumference of the pipeline. Metallugical analysis revealed that the crack in the wrinkle bend was likely due to concentrated mechanical stresses coming from external stresses from probable shifting of the surrounding soil, triaxial state of stresses inherent to in-service wrinkle bends (geometric), and internal line pressure from normal pipeline operations.
Detailed record list
Report Received Date
2010-12-21 00:00:00
Iyear
2010
Report Number
20100106
Supplemental Number
15588
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
2010-11-30 14:50:00
Location Latitude
31.78692
Location Longitude
-93.125589
Nrc Rpt Num
961059
Nrc Rpt Datetime
2010-11-30 16:10:00
Commodity Released Type
Natural Gas
Unintentional Release
14980
Intentional Release
0
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2010-11-30 16:00:00
Restart Datetime
2012-05-11 14:20:00
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Incident Identified Datetime
2010-11-30 14:50:00
On Site Datetime
2010-11-30 16:00:00
On Off Shore
Onshore
Onshore State Abbreviation
La
Onshore Postal Code
71457
Onshore City Name
Natchitoches
Onshore County Name
Natchitoches
Designated Location
Milepost
Designated Name
40-2d + 1.39
Pipe Fac Name
Line 100-2
Segment Name
40-2d
Federal
No
Location Type
Operator-Controlled Property
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
56
Crossing
No
Pipe Facility Type
Interstate
System Part Involved
Onshore Pipeline, Including Valve Sites
Item Involved
Pipe
Pipe Type
Pipe Body
Pipe Diameter
30
Pipe Wall Thickness
0.312
Pipe Smys
52000
Pipe Specification
Api 5l Or Equivalent
Pipe Seam Type
Dsaw
Pipe Manufacturer
Consolidated
Pipe Coating Type
Coal Tar
Installation Year
1948
Manufactured Year
1948
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Crack
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
567
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
54000
Est Cost Intentional Release
0
Est Cost Prop Damage
52000
Est Cost Emergency
10000
Est Cost Other
0
Prpty
116000
Accident Psig
671
Mop Psig
750
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
29257
Internal Inspection 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
Notification From Public
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
No overpressure condition was present.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Material Failure Of Pipe Or Weld
Cause Details
Design-, Construction-, Installation-, Or Fabrication-Related
Pwjf Failure Type
Design-, Construction-, Installation-, Or Fabrication-Related
Metallurgical Ind
Yes
Mechanical Stress
Yes
Additional Pipe Bend Ind
Yes
Additional Crack Ind
Yes
Additional Wrinkle Ind
Yes
Collected Data Ind
Yes
Axial Magnetic Flx Lkg Ind
Yes
Geometry Deformation Ind
Yes
Axial Recent Year
2010
Geometry Recent Year
2010
Has Hydrtst Conduc Before Ind
Yes
Hydrtst Most Rcnt Year
1985
Hydrtst Most Rcnt Pressure
1024
Direct Asmnt Conducted
No
Non Destructive Exam Ind
No
Preparer Name
K****** C* P*****
Preparer Title
Manager - Dot Compliance Field Support
Preparer Email
K*********@e*****.com
Preparer Telephone
2053257554
Preparer Fax
2053253729
Authorizer Name
K****** C* P*****
Authorizer Title
Manager - Dot Compliance Field Support
Authorizer Telephone
2053257554
Authorizer Email
K*********@e*****.com
Narrative
A loud noise was reported to tennessee gas pipeline (tgp) by a member of the general public in the vicinity of tgp pipeline facilities in natchitoches, louisiana. Upon initial investigation, tgp operations personnel found a natural gas leak in the 100-2 pipeline. Visual examination revealed that the leak was coming from a crack in a wrinkle bend. The crack was 1/2" wide and propagated for a length of 50.5" around the circumference of the pipeline. Metallugical analysis revealed that the crack in the wrinkle bend was likely due to concentrated mechanical stresses coming from external stresses from probable shifting of the surrounding soil, triaxial state of stresses inherent to in-service wrinkle bends (geometric), and internal line pressure from normal pipeline operations.
| Report Received Date | 2010-12-21 00:00:00 |
|---|---|
| Iyear | 2010 |
| Report Number | 20100106 |
| Supplemental Number | 15588 |
| 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 | 2010-11-30 14:50:00 |
| Location Latitude | 31.78692 Google Maps OpenStreetMap |
| Location Longitude | -93.125589 Google Maps OpenStreetMap |
| Nrc Rpt Num | 961059 NRC Report How to search |
| Nrc Rpt Datetime | 2010-11-30 16:10:00 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 14980 |
| Intentional Release | 0 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2010-11-30 16:00:00 |
| Restart Datetime | 2012-05-11 14:20:00 |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2010-11-30 14:50:00 |
| On Site Datetime | 2010-11-30 16:00:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | La |
| Onshore Postal Code | 71457 |
| Onshore City Name | Natchitoches |
| Onshore County Name | Natchitoches |
| Designated Location | Milepost |
| Designated Name | 40-2d + 1.39 |
| Pipe Fac Name | Line 100-2 |
| Segment Name | 40-2d |
| Federal | No |
| Location Type | Operator-Controlled Property |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 56 |
| Crossing | No |
| Pipe Facility Type | Interstate |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Pipe Diameter | 30 |
| Pipe Wall Thickness | 0.312 |
| Pipe Smys | 52000 |
| Pipe Specification | Api 5l Or Equivalent |
| Pipe Seam Type | Dsaw |
| Pipe Manufacturer | Consolidated |
| Pipe Coating Type | Coal Tar |
| Installation Year | 1948 |
| Manufactured Year | 1948 |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Crack |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 567 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 54000 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 52000 |
| Est Cost Emergency | 10000 |
| Est Cost Other | 0 |
| Prpty | 116000 |
| Accident Psig | 671 |
| Mop Psig | 750 |
| 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 | 29257 |
| Internal Inspection 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 | Notification From Public |
| 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 | No overpressure condition was present. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Material Failure Of Pipe Or Weld |
| Cause Details | Design-, Construction-, Installation-, Or Fabrication-Related |
| Pwjf Failure Type | Design-, Construction-, Installation-, Or Fabrication-Related |
| Metallurgical Ind | Yes |
| Mechanical Stress | Yes |
| Additional Pipe Bend Ind | Yes |
| Additional Crack Ind | Yes |
| Additional Wrinkle Ind | Yes |
| Collected Data Ind | Yes |
| Axial Magnetic Flx Lkg Ind | Yes |
| Geometry Deformation Ind | Yes |
| Axial Recent Year | 2010 |
| Geometry Recent Year | 2010 |
| Has Hydrtst Conduc Before Ind | Yes |
| Hydrtst Most Rcnt Year | 1985 |
| Hydrtst Most Rcnt Pressure | 1024 |
| Direct Asmnt Conducted | No |
| Non Destructive Exam Ind | No |
| Preparer Name | K****** C* P***** |
| Preparer Title | Manager - Dot Compliance Field Support |
| Preparer Email | K*********@e*****.com |
| Preparer Telephone | 2053257554 |
| Preparer Fax | 2053253729 |
| Authorizer Name | K****** C* P***** |
| Authorizer Title | Manager - Dot Compliance Field Support |
| Authorizer Telephone | 2053257554 |
| Authorizer Email | K*********@e*****.com |
| Narrative | A loud noise was reported to tennessee gas pipeline (tgp) by a member of the general public in the vicinity of tgp pipeline facilities in natchitoches, louisiana. Upon initial investigation, tgp operations personnel found a natural gas leak in the 100-2 pipeline. Visual examination revealed that the leak was coming from a crack in a wrinkle bend. The crack was 1/2" wide and propagated for a length of 50.5" around the circumference of the pipeline. Metallugical analysis revealed that the crack in the wrinkle bend was likely due to concentrated mechanical stresses coming from external stresses from probable shifting of the surrounding soil, triaxial state of stresses inherent to in-service wrinkle bends (geometric), and internal line pressure from normal pipeline operations. |
External Resources
PHMSA pipeline safety insights.
Product
Features
Company
All rights reserved. Copyright © by ClearPHMSA