GTG incident on 2013-08-20 — TX

Operator
Enable Oklahoma Intrastate Transmission, Llc
Cause
Miscellaneous Root Causes
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities 0 injuries
Property damage (nominal)
$40,000
Incident datetime
2013-08-20 11:05
Report number
Location
TX
Narrative
Mcalester line 263 ruptured just south of kiowa in a pasture causing a grass/timber fire. Local fire department and local authorities arrived on scene to assist. No injuries and no structures were involved. The pipeline fire dissipated from shutting the gas in and fire department was able to control fire and keep it from spreading. The damaged section of pipe was removed and showed signs of third-party damage. It has been sent to a metallurgist for further analysis and we are awaiting the results. Note: the damaged section of pipe was replaced. A gauge pig was ran on 8/22/13 before pipeline was placed back into service. Supplemental information. The metallurgist report concluded that the third party damage resulted in: fracture initiated on a damaged area of the pipeline where deep gouge marks were noted on the outside surface. There were two parallel scrape marks running roughly in the longitudinal direction and produced considerable deformation of the steel. Final failure of the pipeline was a result of ductile overload. External damage and necking had resulted in a wall thickness reduced to approximately 0.160" from the measured 0.225" undamaged wall nearby. The undamaged section of pipe was tested and met all the requirements of API specification 5l, psl 2, grade x52.
Detailed record list
Report Received Date
2013-09-19 00:00:00
Iyear
2013
Report Number
20130088
Supplemental Number
16282
Report Type
Supplemental Final
Operator Id
26330
PHMSA Enforcement
Name
Enable Oklahoma Intrastate Transmission, Llc
Operator Street Address
1300 Main Street
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77002
Local Datetime
2013-08-20 11:05:00
Location Latitude
34.695189
Google Maps OpenStreetMap
Location Longitude
-95.919508
Google Maps OpenStreetMap
Nrc Rpt Num
1057718
NRC Report How to search
Nrc Rpt Datetime
2013-08-20 18:20:00
Commodity Released Type
Natural Gas
Unintentional Release
5100
Intentional Release
680
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2013-08-20 11:22:00
Restart Datetime
2013-08-22 10:00:00
Ignite Ind
Yes
Explode Ind
No
Num Pub Evacuated
0
Incident Identified Datetime
2013-08-20 11:05:00
On Site Datetime
2013-08-20 11:25:00
On Off Shore
Onshore
Onshore State Abbreviation
Ok
Onshore Postal Code
74553
Onshore City Name
Kiowa
Onshore County Name
Pittsburg County
Designated Location
Milepost
Pipe Fac Name
L-263
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
36
Crossing
No
Pipe Facility Type
Intrastate
System Part Involved
Onshore Pipeline, Including Valve Sites
Item Involved
Pipe
Pipe Type
Pipe Body
Pipe Diameter
12
Pipe Wall Thickness
0.219
Pipe Smys
52000
Pipe Specification
Longitudinal Erw- High Frequency
Pipe Seam Type
Longitudinal Erw - High Frequency
Pipe Manufacturer
Lone Star Steel
Pipe Coating Type
Epoxy
Installation Year
2007
Manufactured Year
2007
Material Involved
Carbon Steel
Release Type
Rupture
Rupture Orient
Circumferential
Rupture Length
36
Rupture Width
12
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
305
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
13500
Est Cost Unintentional Release
17000
Est Cost Intentional Release
2300
Est Cost Prop Damage
40000
Est Cost Emergency
3000
Est Cost Other
0
Prpty
75800
Accident Psig
1120
Mop Psig
1200
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
50160
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
Yes
Accident Identifier
Local Operating Personnel, Including Contractors
Operator Type
Operator Employee
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
Pipe showing signs of third party damage
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Excavation Damage
Cause Details
Previous Damage Due To Excavation Activity
Ex Party Type
Previous Damage Due To Excavation Activity
Notify Cga Dirt
No
Private Row Ind
Yes
Private Subtype
Private Landowner
Excavator Type
Unknown/other
Excavator Equipment
Unknown/other
Work Performed
Unknown/other
One Call Notified Ind
No
Locator Type
Unknown/other
Visible Marks
No
Service Interruption
No
Root Cause Category
Miscellaneous Root Causes
Root Cause Type
Previous Damage
Collected Data Ind
No
Insp Compl Before Damage Ind
No
Has Hydrtst Conduc Before Ind
No
Direct Asmnt Conducted
No
Non Destructive Exam Ind
No
Preparer Name
P****** K*****
Preparer Title
Dot Compliance Coordinator
Preparer Email
K*************@e*****.com
Preparer Telephone
9186883330
Authorizer Name
P*** M B*****
Authorizer Title
V.p. Operations
Authorizer Telephone
4055257788
Authorizer Email
No Email Address
Narrative
Mcalester line 263 ruptured just south of kiowa in a pasture causing a grass/timber fire. Local fire department and local authorities arrived on scene to assist. No injuries and no structures were involved. The pipeline fire dissipated from shutting the gas in and fire department was able to control fire and keep it from spreading. The damaged section of pipe was removed and showed signs of third-party damage. It has been sent to a metallurgist for further analysis and we are awaiting the results. Note: the damaged section of pipe was replaced. A gauge pig was ran on 8/22/13 before pipeline was placed back into service. Supplemental information. The metallurgist report concluded that the third party damage resulted in: fracture initiated on a damaged area of the pipeline where deep gouge marks were noted on the outside surface. There were two parallel scrape marks running roughly in the longitudinal direction and produced considerable deformation of the steel. Final failure of the pipeline was a result of ductile overload. External damage and necking had resulted in a wall thickness reduced to approximately 0.160" from the measured 0.225" undamaged wall nearby. The undamaged section of pipe was tested and met all the requirements of API specification 5l, psl 2, grade x52.
Report Received Date 2013-09-19 00:00:00
Iyear 2013
Report Number 20130088
Supplemental Number 16282
Report Type Supplemental Final
Operator Id 26330 PHMSA Enforcement
Name Enable Oklahoma Intrastate Transmission, Llc
Operator Street Address 1300 Main Street
Operator City Name Houston
Operator State Abbreviation TX
Operator Postal Code 77002
Local Datetime 2013-08-20 11:05:00
Location Latitude 34.695189 Google Maps OpenStreetMap
Location Longitude -95.919508 Google Maps OpenStreetMap
Nrc Rpt Num 1057718 NRC Report How to search
Nrc Rpt Datetime 2013-08-20 18:20:00
Commodity Released Type Natural Gas
Unintentional Release 5100
Intentional Release 680
Accompanying Liquid 0
Fatality Ind No
Fatal 0
Injury Ind No
Injure 0
Shutdown Due Accident Ind Yes
Shutdown Datetime 2013-08-20 11:22:00
Restart Datetime 2013-08-22 10:00:00
Ignite Ind Yes
Explode Ind No
Num Pub Evacuated 0
Incident Identified Datetime 2013-08-20 11:05:00
On Site Datetime 2013-08-20 11:25:00
On Off Shore Onshore
Onshore State Abbreviation Ok
Onshore Postal Code 74553
Onshore City Name Kiowa
Onshore County Name Pittsburg County
Designated Location Milepost
Pipe Fac Name L-263
Federal No
Location Type Pipeline Right-Of-Way
Incident Area Type Underground
Incident Area Subtype Under Soil
Depth Of Cover 36
Crossing No
Pipe Facility Type Intrastate
System Part Involved Onshore Pipeline, Including Valve Sites
Item Involved Pipe
Pipe Type Pipe Body
Pipe Diameter 12
Pipe Wall Thickness 0.219
Pipe Smys 52000
Pipe Specification Longitudinal Erw- High Frequency
Pipe Seam Type Longitudinal Erw - High Frequency
Pipe Manufacturer Lone Star Steel
Pipe Coating Type Epoxy
Installation Year 2007
Manufactured Year 2007
Material Involved Carbon Steel
Release Type Rupture
Rupture Orient Circumferential
Rupture Length 36
Rupture Width 12
Class Location Type Class 1 Location
Could Be Hca No
Pir Radius 305
Heat Damage Ind No
Non Heat Damage Ind No
Hca Fatalities Ind No
Est Cost Oper Paid 13500
Est Cost Unintentional Release 17000
Est Cost Intentional Release 2300
Est Cost Prop Damage 40000
Est Cost Emergency 3000
Est Cost Other 0
Prpty 75800
Accident Psig 1120
Mop Psig 1200
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 50160
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 Yes
Accident Identifier Local Operating Personnel, Including Contractors
Operator Type Operator Employee
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 Pipe showing signs of third party damage
Employee Drug Test Ind No
Contractor Drug Test Ind No
Cause Excavation Damage
Cause Details Previous Damage Due To Excavation Activity
Ex Party Type Previous Damage Due To Excavation Activity
Notify Cga Dirt No
Private Row Ind Yes
Private Subtype Private Landowner
Excavator Type Unknown/other
Excavator Equipment Unknown/other
Work Performed Unknown/other
One Call Notified Ind No
Locator Type Unknown/other
Visible Marks No
Service Interruption No
Root Cause Category Miscellaneous Root Causes
Root Cause Type Previous Damage
Collected Data Ind No
Insp Compl Before Damage Ind No
Has Hydrtst Conduc Before Ind No
Direct Asmnt Conducted No
Non Destructive Exam Ind No
Preparer Name P****** K*****
Preparer Title Dot Compliance Coordinator
Preparer Email K*************@e*****.com
Preparer Telephone 9186883330
Authorizer Name P*** M B*****
Authorizer Title V.p. Operations
Authorizer Telephone 4055257788
Authorizer Email No Email Address
Narrative Mcalester line 263 ruptured just south of kiowa in a pasture causing a grass/timber fire. Local fire department and local authorities arrived on scene to assist. No injuries and no structures were involved. The pipeline fire dissipated from shutting the gas in and fire department was able to control fire and keep it from spreading. The damaged section of pipe was removed and showed signs of third-party damage. It has been sent to a metallurgist for further analysis and we are awaiting the results. Note: the damaged section of pipe was replaced. A gauge pig was ran on 8/22/13 before pipeline was placed back into service. Supplemental information. The metallurgist report concluded that the third party damage resulted in: fracture initiated on a damaged area of the pipeline where deep gouge marks were noted on the outside surface. There were two parallel scrape marks running roughly in the longitudinal direction and produced considerable deformation of the steel. Final failure of the pipeline was a result of ductile overload. External damage and necking had resulted in a wall thickness reduced to approximately 0.160" from the measured 0.225" undamaged wall nearby. The undamaged section of pipe was tested and met all the requirements of API specification 5l, psl 2, grade x52.
External Resources
Google Maps OpenStreetMap NPMS Public Viewer PHMSA Source Data PHMSA Enforcement NRC Report NTSB CAROL
ClearPHMSA
PHMSA pipeline safety insights.
Product
Features
Services
Company

All rights reserved. Copyright © by ClearPHMSA