Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2015-08-03 — TX
Operator
Tennessee Gas Pipeline Company
Cause
Material Failure Of Pipe Or Weld
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$40,601
Incident datetime
2015-08-03 20:36
Report number
Location
TX
Narrative
On 08/03/2015 at approximately 8:36pm tennessee gas pipeline (tgp) gas control received a pressure rate of change critical alarm on line 400-1. The gas controller contacted tgp operations to dispatch personnel to the possible leak site and take tgp station 1 offline. The controller also confirmed that local emergency responders, including the brooks county sheriffs department, were on-site. Operations initiated emergency response. The 400-1 line from mainline valve (mlv) 403-1 to mlv 404-1 was isolated at 10:06pm and the isolated section was blown down to a zero pressure by 10:15pm. The fire marshal evacuated homes and tx DOT temporarily closed hwy 285 for a 5 mile distance east and west until the isolated segment was blown down. The metallurgical report concluded that the cause was high ph stress corrosion cracking.
Detailed record list
Report Received Date
2015-09-02 00:00:00
Iyear
2015
Report Number
20150110
Supplemental Number
16929
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
2015-08-03 20:36:00
Location Latitude
27.22217
Location Longitude
-98.11031
Nrc Rpt Num
1124690
Nrc Rpt Datetime
2015-08-03 21:49:00
Commodity Released Type
Natural Gas
Unintentional Release
50740
Intentional Release
0
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2015-08-03 22:06:00
Still Shutdown Ind
Yes
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
100
Incident Identified Datetime
2015-08-03 20:36:00
On Site Datetime
2015-08-03 21:30:00
On Off Shore
Onshore
Onshore State Abbreviation
Tx
Onshore Postal Code
78355
Onshore City Name
Falfurrias
Onshore County Name
Brooks
Designated Location
Milepost
Designated Name
403-1+51168
Pipe Fac Name
San Salvador (400-1)
Segment Name
Line 400-1
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
33
Crossing
No
Pipe Facility Type
Interstate
System Part Involved
Onshore Pipeline, Including Valve Sites
Item Involved
Pipe
Pipe Type
Pipe Body
Pipe Diameter
16
Pipe Wall Thickness
0.25
Pipe Smys
42000
Pipe Specification
Api 5l X42
Pipe Seam Type
Longitudinal Erw - Low Frequency
Pipe Manufacturer
Youngstown Sheet & Tube
Pipe Coating Type
Coal Tar
Installation Year
1947
Manufactured Year
1947
Material Involved
Carbon Steel
Release Type
Rupture
Rupture Orient
Longitudinal
Rupture Length
675
Rupture Width
16
Class Location Type
Class 2 Location
Could Be Hca
No
Pir Radius
332
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
147585
Est Cost Intentional Release
0
Est Cost Prop Damage
40601
Est Cost Emergency
3312
Est Cost Other
0
Prpty
191498
Accident Psig
827
Mop Psig
903
Mop Cfr Section
192.619(A)(2)
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Upstream Valve Type Ind
Manual
Downstream Valve Type Ind
Manual
Length Segment Isolated
58925
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
Yes
Scada Conf Ind
Yes
Accident Identifier
Scada-Based Information (Such As Alarm(S), Alert(S), Event(S), And/or Volume Or Pack Calculations)
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
The rupture was not related to controller actions and the controller notified tgp operations as soon as the incident was identified.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Material Failure Of Pipe Or Weld
Cause Details
Environmental Cracking-Related
Pwjf Failure Type
Environmental Cracking-Related
Metallurgical Ind
Yes
Stress Subtype
Stress Corrosion Cracking
Pwf Additional Other Ind
Yes
Additional Other Details
Preexisting Oxide Inclusions And Seams/laps In The Steel
Collected Data Ind
Yes
Other Tool Tech Ind
Yes
Other Tool
Combination Tool
Other Recent Year
2009
Has Hydrtst Conduc Before Ind
Yes
Hydrtst Most Rcnt Year
1997
Hydrtst Most Rcnt Pressure
1225
Direct Asmnt Conducted
No
Non Destructive Exam Ind
No
Preparer Name
K****** V** D** L***
Preparer Title
Compliance Engineer Iii
Preparer Email
K*****************@k***********.com
Preparer Telephone
303-914-7753
Authorizer Name
R*** G*****
Authorizer Title
Director - Compliance Codes And Standards
Authorizer Telephone
713-420-5433
Authorizer Email
R**********@k***********.com
Narrative
On 08/03/2015 at approximately 8:36pm tennessee gas pipeline (tgp) gas control received a pressure rate of change critical alarm on line 400-1. The gas controller contacted tgp operations to dispatch personnel to the possible leak site and take tgp station 1 offline. The controller also confirmed that local emergency responders, including the brooks county sheriffs department, were on-site. Operations initiated emergency response. The 400-1 line from mainline valve (mlv) 403-1 to mlv 404-1 was isolated at 10:06pm and the isolated section was blown down to a zero pressure by 10:15pm. The fire marshal evacuated homes and tx DOT temporarily closed hwy 285 for a 5 mile distance east and west until the isolated segment was blown down. The metallurgical report concluded that the cause was high ph stress corrosion cracking.
| Report Received Date | 2015-09-02 00:00:00 |
|---|---|
| Iyear | 2015 |
| Report Number | 20150110 |
| Supplemental Number | 16929 |
| 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 | 2015-08-03 20:36:00 |
| Location Latitude | 27.22217 Google Maps OpenStreetMap |
| Location Longitude | -98.11031 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1124690 NRC Report How to search |
| Nrc Rpt Datetime | 2015-08-03 21:49:00 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 50740 |
| Intentional Release | 0 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2015-08-03 22:06:00 |
| Still Shutdown Ind | Yes |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 100 |
| Incident Identified Datetime | 2015-08-03 20:36:00 |
| On Site Datetime | 2015-08-03 21:30:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Tx |
| Onshore Postal Code | 78355 |
| Onshore City Name | Falfurrias |
| Onshore County Name | Brooks |
| Designated Location | Milepost |
| Designated Name | 403-1+51168 |
| Pipe Fac Name | San Salvador (400-1) |
| Segment Name | Line 400-1 |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 33 |
| Crossing | No |
| Pipe Facility Type | Interstate |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Pipe Diameter | 16 |
| Pipe Wall Thickness | 0.25 |
| Pipe Smys | 42000 |
| Pipe Specification | Api 5l X42 |
| Pipe Seam Type | Longitudinal Erw - Low Frequency |
| Pipe Manufacturer | Youngstown Sheet & Tube |
| Pipe Coating Type | Coal Tar |
| Installation Year | 1947 |
| Manufactured Year | 1947 |
| Material Involved | Carbon Steel |
| Release Type | Rupture |
| Rupture Orient | Longitudinal |
| Rupture Length | 675 |
| Rupture Width | 16 |
| Class Location Type | Class 2 Location |
| Could Be Hca | No |
| Pir Radius | 332 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 147585 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 40601 |
| Est Cost Emergency | 3312 |
| Est Cost Other | 0 |
| Prpty | 191498 |
| Accident Psig | 827 |
| Mop Psig | 903 |
| 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 | Manual |
| Downstream Valve Type Ind | Manual |
| Length Segment Isolated | 58925 |
| 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 | Yes |
| Scada Conf Ind | Yes |
| Accident Identifier | Scada-Based Information (Such As Alarm(S), Alert(S), Event(S), And/or Volume Or Pack Calculations) |
| 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 | The rupture was not related to controller actions and the controller notified tgp operations as soon as the incident was identified. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Material Failure Of Pipe Or Weld |
| Cause Details | Environmental Cracking-Related |
| Pwjf Failure Type | Environmental Cracking-Related |
| Metallurgical Ind | Yes |
| Stress Subtype | Stress Corrosion Cracking |
| Pwf Additional Other Ind | Yes |
| Additional Other Details | Preexisting Oxide Inclusions And Seams/laps In The Steel |
| Collected Data Ind | Yes |
| Other Tool Tech Ind | Yes |
| Other Tool | Combination Tool |
| Other Recent Year | 2009 |
| Has Hydrtst Conduc Before Ind | Yes |
| Hydrtst Most Rcnt Year | 1997 |
| Hydrtst Most Rcnt Pressure | 1225 |
| Direct Asmnt Conducted | No |
| Non Destructive Exam Ind | No |
| Preparer Name | K****** V** D** L*** |
| Preparer Title | Compliance Engineer Iii |
| Preparer Email | K*****************@k***********.com |
| Preparer Telephone | 303-914-7753 |
| Authorizer Name | R*** G***** |
| Authorizer Title | Director - Compliance Codes And Standards |
| Authorizer Telephone | 713-420-5433 |
| Authorizer Email | R**********@k***********.com |
| Narrative | On 08/03/2015 at approximately 8:36pm tennessee gas pipeline (tgp) gas control received a pressure rate of change critical alarm on line 400-1. The gas controller contacted tgp operations to dispatch personnel to the possible leak site and take tgp station 1 offline. The controller also confirmed that local emergency responders, including the brooks county sheriffs department, were on-site. Operations initiated emergency response. The 400-1 line from mainline valve (mlv) 403-1 to mlv 404-1 was isolated at 10:06pm and the isolated section was blown down to a zero pressure by 10:15pm. The fire marshal evacuated homes and tx DOT temporarily closed hwy 285 for a 5 mile distance east and west until the isolated segment was blown down. The metallurgical report concluded that the cause was high ph stress corrosion cracking. |
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