Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2023-11-13 — OK
Operator
Transcontinental Gas Pipe Line Company
Cause
Equipment Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$2,500
Incident datetime
2023-11-13 00:00 UTC
Report number
Location
OK
Narrative
Timeline of incident 10/22/23: (all times cdt) pipeline control began to see gas build-up on system with no place for gas to go sta 60 was operating with one line in and one line out -approx 12:10pm person on call (poc) received call from gas control that pressure was rising (approx 796psi) and units were slowing down poc was asked by p/l ctrl to put another discharge line in service -approx 12:13pm main unit #2 psv lifted (this was found from pi vision/hmi trending data) -approx 12:30pm poc arrived at station and heard blowing from compressor building -approx 12:36pm poc shut down and isolated mu2 10/23/23: began troubleshooting psv to determine cause; found trash in pilot (likely cause of failure) 10/26/2023 mu#2 returned to service
Detailed record list
Report Received Date
2023-11-13 00:00:00
Iyear
2023
Report Number
20230105
Supplemental Number
38792
Report Type
Original Final
Operator Id
19570
Name
Transcontinental Gas Pipe Line Company
Operator Street Address
One Williams Center Md 43-4
Operator City Name
Tulsa
Operator State Abbreviation
OK
Operator Postal Code
74172
Time Zone
Central
Daylight Savings Ind
Yes
Location Latitude
30.744167
Location Longitude
-91.266389
Nrc Rpt Num
1382424
Additional Nrc Report Numbers
1382575
Commodity Released Type
Natural Gas
Unintentional Release
3080
Intentional Release
0
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Status When Identified
Normal Operation, Includes Pauses During Maintenance
Shutdown Due Accident Ind
No
Shutdown Explain
Release Did Not Impact Pipeline Operations
Communication State Fed Ind
No
Ignite Ind
No
Num Pub Evacuated
0
On Off Shore
Onshore
Onshore State Abbreviation
La
Onshore Postal Code
70748
Onshore City Name
Jackson
Onshore County Name
East Feliciana
Designated Location
Milepost
Designated Name
588.62
Pipe Fac Name
Station 60
Segment Name
Main Unit #2
Federal
No
Location Type
Operator-Controlled Property
Incident Area Type
Aboveground
Incident Area Subtype
Typical Aboveground Facility Piping Or Appurtenance
Crossing
No
Pipe Facility Type
Interstate
System Part Involved
Onshore Compressor Station Equipment And Piping
Item Involved
Compressor
Installation Year
Unknown
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Other
Release Type Details
Relief Valve Prematurely Lifted And Failed To Seat.
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
648
Heat Damage Ind
No
Non Heat Damage Ind
No
Did Occur In Mca Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
9178
Est Cost Intentional Release
0
Est Cost Prop Damage
2500
Est Cost Emergency
0
Est Cost Other
0
Gas Cost In Mcf
2.98
Prpty
11678
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
0
Num Business Building Affctd
0
Wildlife Impact Ind
No
Accident Psig
796
Gas Flow In Pipe In Mcf
8000
Mop Psig
800
Mop Cfr Section
192.619(A)(1)
Maop Established Date
2001-07-21 00:00:00
Maop Reversal Flow Ind
Yes
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Gas Required Odorized 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
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
The relief valve was prematurely lifted.
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
Relief Valve Ind
Yes
Eq Additional Other Ind
Yes
Eq Additional Other Details
Pulsation In The Sensing Line. Did Not Re-Seat Due To Debris.
Preparer Name
E**** R********
Preparer Title
Regulatory Compliance Specialist Sr.
Preparer Email
E****************@w*******.com
Preparer Telephone
713-303-9956
Local Contact Name
B**** B***
Local Contact Email
B*********@w*******.com
Local Contact Telephone
985-859-5368
Authorizer Name
J*** B***
Authorizer Title
Manager Pipeline Safety
Authorizer Telephone
337-317-9145
Authorizer Email
J********@w*******.com
Narrative
Timeline of incident 10/22/23: (all times cdt) pipeline control began to see gas build-up on system with no place for gas to go sta 60 was operating with one line in and one line out -approx 12:10pm person on call (poc) received call from gas control that pressure was rising (approx 796psi) and units were slowing down poc was asked by p/l ctrl to put another discharge line in service -approx 12:13pm main unit #2 psv lifted (this was found from pi vision/hmi trending data) -approx 12:30pm poc arrived at station and heard blowing from compressor building -approx 12:36pm poc shut down and isolated mu2 10/23/23: began troubleshooting psv to determine cause; found trash in pilot (likely cause of failure) 10/26/2023 mu#2 returned to service
| Report Received Date | 2023-11-13 00:00:00 |
|---|---|
| Iyear | 2023 |
| Report Number | 20230105 |
| Supplemental Number | 38792 |
| Report Type | Original Final |
| Operator Id | 19570 PHMSA Enforcement |
| Name | Transcontinental Gas Pipe Line Company |
| Operator Street Address | One Williams Center Md 43-4 |
| Operator City Name | Tulsa |
| Operator State Abbreviation | OK |
| Operator Postal Code | 74172 |
| Time Zone | Central |
| Daylight Savings Ind | Yes |
| Location Latitude | 30.744167 Google Maps OpenStreetMap |
| Location Longitude | -91.266389 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1382424 NRC Report How to search |
| Additional Nrc Report Numbers | 1382575 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 3080 |
| Intentional Release | 0 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Status When Identified | Normal Operation, Includes Pauses During Maintenance |
| Shutdown Due Accident Ind | No |
| Shutdown Explain | Release Did Not Impact Pipeline Operations |
| Communication State Fed Ind | No |
| Ignite Ind | No |
| Num Pub Evacuated | 0 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | La |
| Onshore Postal Code | 70748 |
| Onshore City Name | Jackson |
| Onshore County Name | East Feliciana |
| Designated Location | Milepost |
| Designated Name | 588.62 |
| Pipe Fac Name | Station 60 |
| Segment Name | Main Unit #2 |
| Federal | No |
| Location Type | Operator-Controlled Property |
| Incident Area Type | Aboveground |
| Incident Area Subtype | Typical Aboveground Facility Piping Or Appurtenance |
| Crossing | No |
| Pipe Facility Type | Interstate |
| System Part Involved | Onshore Compressor Station Equipment And Piping |
| Item Involved | Compressor |
| Installation Year | Unknown |
| Manufactured Year | Unknown |
| Material Involved | Carbon Steel |
| Release Type | Other |
| Release Type Details | Relief Valve Prematurely Lifted And Failed To Seat. |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 648 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Did Occur In Mca Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 9178 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 2500 |
| Est Cost Emergency | 0 |
| Est Cost Other | 0 |
| Gas Cost In Mcf | 2.98 |
| Prpty | 11678 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 0 |
| Num Business Building Affctd | 0 |
| Wildlife Impact Ind | No |
| Accident Psig | 796 |
| Gas Flow In Pipe In Mcf | 8000 |
| Mop Psig | 800 |
| Mop Cfr Section | 192.619(A)(1) View CFR 49 §192 |
| Maop Established Date | 2001-07-21 00:00:00 |
| Maop Reversal Flow Ind | Yes |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | No |
| Gas Required Odorized 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 | 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 | The relief valve was prematurely lifted. |
| 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 |
| Relief Valve Ind | Yes |
| Eq Additional Other Ind | Yes |
| Eq Additional Other Details | Pulsation In The Sensing Line. Did Not Re-Seat Due To Debris. |
| Preparer Name | E**** R******** |
| Preparer Title | Regulatory Compliance Specialist Sr. |
| Preparer Email | E****************@w*******.com |
| Preparer Telephone | 713-303-9956 |
| Local Contact Name | B**** B*** |
| Local Contact Email | B*********@w*******.com |
| Local Contact Telephone | 985-859-5368 |
| Authorizer Name | J*** B*** |
| Authorizer Title | Manager Pipeline Safety |
| Authorizer Telephone | 337-317-9145 |
| Authorizer Email | J********@w*******.com |
| Narrative | Timeline of incident 10/22/23: (all times cdt) pipeline control began to see gas build-up on system with no place for gas to go sta 60 was operating with one line in and one line out -approx 12:10pm person on call (poc) received call from gas control that pressure was rising (approx 796psi) and units were slowing down poc was asked by p/l ctrl to put another discharge line in service -approx 12:13pm main unit #2 psv lifted (this was found from pi vision/hmi trending data) -approx 12:30pm poc arrived at station and heard blowing from compressor building -approx 12:36pm poc shut down and isolated mu2 10/23/23: began troubleshooting psv to determine cause; found trash in pilot (likely cause of failure) 10/26/2023 mu#2 returned to service |
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