Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2011-02-14 — TX
Operator
Gulf South Pipeline Company, Lp
Cause
Equipment Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$30,000,000
Incident datetime
2011-02-14 22:14
Report number
Location
TX
Narrative
Summary of operations just prior to incident on 02-14-2011. A) three turbines were running with a suction pressure of 688 psi and a discharge pressure of 1137 psi. B) at 09:11:24 pm, gas control put a stop in t7. C) at 09:25:03 pm, esd was activated by fire detectors. The initial fire was a lube oil fire. Subsequently after an elbow ruptured the released gas ignited and burned until gas flow was stopped. The root cause of the incident was determened to be the failure of a check valve in the turbine unit discharge line. 1) check vavle on turbine unit t7 discharge line was damaged. Check valve internals seperated when center bolt failed. Failure cause was determined to be overtorquing of center bolt by manufucture during valve assembly. 2) diccharge valve on unit t7 did not fully close during the unit shut down because parts of the check valve internals was stuck in the vavle. 3) 24" elbow located in the basement on the suction line of unit t7 compressor, ruptured from a manufacturing defect which was weakened by the heat from the lube oil fire alowing gas to be released into the compressor building and ignite. The damaged facilities have been repaired and returned to service on 07-16-2011. Updated part e.5f as requested by PHMSA.
Detailed record list
Report Received Date
2011-03-14 00:00:00
Iyear
2011
Report Number
20110029
Supplemental Number
15838
Report Type
Supplemental Final
Operator Id
31728
Name
Gulf South Pipeline Company, Lp
Operator Street Address
9 Greenway Plaza Suite 2800
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77046
Local Datetime
2011-02-14 21:40:00
Location Latitude
32.8616
Location Longitude
-94.1599
Nrc Rpt Num
967474
Nrc Rpt Datetime
2011-02-14 22:19:00
Commodity Released Type
Natural Gas
Unintentional Release
14400
Intentional Release
600
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2011-02-14 21:40:00
Restart Datetime
2011-07-16 00:00:00
Ignite Ind
Yes
Explode Ind
No
Num Pub Evacuated
0
Incident Identified Datetime
2011-02-14 22:14:00
On Site Datetime
2011-02-14 22:15:00
On Off Shore
Onshore
Onshore State Abbreviation
Tx
Onshore Postal Code
75633
Onshore City Name
Carthage
Onshore County Name
Panola
Designated Location
Milepost
Designated Name
00.00
Pipe Fac Name
Carthage Junction Copressor Station
Segment Name
Index 816
Federal
No
Location Type
Operator-Controlled Property
Incident Area Type
Aboveground
Incident Area Subtype
Inside A Building
Crossing
No
Pipe Facility Type
Interstate
System Part Involved
Onshore Compressor Station Equipment And Piping
Item Involved
Valve
Valve Type
Auxiliary Or Other Valve
Installation Year
2007
Material Involved
Carbon Steel
Release Type
Other
Release Type Details
Check Vavle Failed Allowing Gas To Flow In The Reverse Direction Damaging Turbine Compressor And Subsequent Elbow Rupture
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
1058
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
62208
Est Cost Intentional Release
2592
Est Cost Prop Damage
30000000
Est Cost Emergency
1000
Est Cost Other
0
Prpty
30065800
Accident Psig
1137
Mop Psig
1333
Mop Cfr Section
Not On Omb-Approved Form When Submitted
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction 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
Investigation determined cause was a component failure. No action of gas controil could lead to cause.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Equipment Failure
Cause Details
Malfunction Of Control/relief Equipment
Eq Failure Type
Malfunction Of Control/relief Equipment
Check Valve Ind
Yes
Eq Additional Other Ind
Yes
Eq Additional Other Details
Overtordquing Of Center Bolt By Manufacturer During Assemble Of Check Valve
Preparer Name
S****** M********
Preparer Title
Oq And Pa Coordinator
Preparer Email
S****************@b*****.com
Preparer Telephone
270-688-6357
Preparer Fax
270-688-5871
Authorizer Name
J****** B* M******
Authorizer Title
Manager Codes And Standards
Authorizer Telephone
270-688-6361
Authorizer Email
J***********@b*****.com
Narrative
Summary of operations just prior to incident on 02-14-2011. A) three turbines were running with a suction pressure of 688 psi and a discharge pressure of 1137 psi. B) at 09:11:24 pm, gas control put a stop in t7. C) at 09:25:03 pm, esd was activated by fire detectors. The initial fire was a lube oil fire. Subsequently after an elbow ruptured the released gas ignited and burned until gas flow was stopped. The root cause of the incident was determened to be the failure of a check valve in the turbine unit discharge line. 1) check vavle on turbine unit t7 discharge line was damaged. Check valve internals seperated when center bolt failed. Failure cause was determined to be overtorquing of center bolt by manufucture during valve assembly. 2) diccharge valve on unit t7 did not fully close during the unit shut down because parts of the check valve internals was stuck in the vavle. 3) 24" elbow located in the basement on the suction line of unit t7 compressor, ruptured from a manufacturing defect which was weakened by the heat from the lube oil fire alowing gas to be released into the compressor building and ignite. The damaged facilities have been repaired and returned to service on 07-16-2011. Updated part e.5f as requested by PHMSA.
| Report Received Date | 2011-03-14 00:00:00 |
|---|---|
| Iyear | 2011 |
| Report Number | 20110029 |
| Supplemental Number | 15838 |
| Report Type | Supplemental Final |
| Operator Id | 31728 PHMSA Enforcement |
| Name | Gulf South Pipeline Company, Lp |
| Operator Street Address | 9 Greenway Plaza Suite 2800 |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77046 |
| Local Datetime | 2011-02-14 21:40:00 |
| Location Latitude | 32.8616 Google Maps OpenStreetMap |
| Location Longitude | -94.1599 Google Maps OpenStreetMap |
| Nrc Rpt Num | 967474 NRC Report How to search |
| Nrc Rpt Datetime | 2011-02-14 22:19:00 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 14400 |
| Intentional Release | 600 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2011-02-14 21:40:00 |
| Restart Datetime | 2011-07-16 00:00:00 |
| Ignite Ind | Yes |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2011-02-14 22:14:00 |
| On Site Datetime | 2011-02-14 22:15:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Tx |
| Onshore Postal Code | 75633 |
| Onshore City Name | Carthage |
| Onshore County Name | Panola |
| Designated Location | Milepost |
| Designated Name | 00.00 |
| Pipe Fac Name | Carthage Junction Copressor Station |
| Segment Name | Index 816 |
| Federal | No |
| Location Type | Operator-Controlled Property |
| Incident Area Type | Aboveground |
| Incident Area Subtype | Inside A Building |
| Crossing | No |
| Pipe Facility Type | Interstate |
| System Part Involved | Onshore Compressor Station Equipment And Piping |
| Item Involved | Valve |
| Valve Type | Auxiliary Or Other Valve |
| Installation Year | 2007 |
| Material Involved | Carbon Steel |
| Release Type | Other |
| Release Type Details | Check Vavle Failed Allowing Gas To Flow In The Reverse Direction Damaging Turbine Compressor And Subsequent Elbow Rupture |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 1058 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 62208 |
| Est Cost Intentional Release | 2592 |
| Est Cost Prop Damage | 30000000 |
| Est Cost Emergency | 1000 |
| Est Cost Other | 0 |
| Prpty | 30065800 |
| Accident Psig | 1137 |
| Mop Psig | 1333 |
| 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 |
| 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 | Investigation determined cause was a component failure. No action of gas controil could lead to cause. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Equipment Failure |
| Cause Details | Malfunction Of Control/relief Equipment |
| Eq Failure Type | Malfunction Of Control/relief Equipment |
| Check Valve Ind | Yes |
| Eq Additional Other Ind | Yes |
| Eq Additional Other Details | Overtordquing Of Center Bolt By Manufacturer During Assemble Of Check Valve |
| Preparer Name | S****** M******** |
| Preparer Title | Oq And Pa Coordinator |
| Preparer Email | S****************@b*****.com |
| Preparer Telephone | 270-688-6357 |
| Preparer Fax | 270-688-5871 |
| Authorizer Name | J****** B* M****** |
| Authorizer Title | Manager Codes And Standards |
| Authorizer Telephone | 270-688-6361 |
| Authorizer Email | J***********@b*****.com |
| Narrative | Summary of operations just prior to incident on 02-14-2011. A) three turbines were running with a suction pressure of 688 psi and a discharge pressure of 1137 psi. B) at 09:11:24 pm, gas control put a stop in t7. C) at 09:25:03 pm, esd was activated by fire detectors. The initial fire was a lube oil fire. Subsequently after an elbow ruptured the released gas ignited and burned until gas flow was stopped. The root cause of the incident was determened to be the failure of a check valve in the turbine unit discharge line. 1) check vavle on turbine unit t7 discharge line was damaged. Check valve internals seperated when center bolt failed. Failure cause was determined to be overtorquing of center bolt by manufucture during valve assembly. 2) diccharge valve on unit t7 did not fully close during the unit shut down because parts of the check valve internals was stuck in the vavle. 3) 24" elbow located in the basement on the suction line of unit t7 compressor, ruptured from a manufacturing defect which was weakened by the heat from the lube oil fire alowing gas to be released into the compressor building and ignite. The damaged facilities have been repaired and returned to service on 07-16-2011. Updated part e.5f as requested by PHMSA. |
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