Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2023-09-15 — TX
Operator
Tennessee Gas Pipeline Company
Cause
Equipment Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$27,000,000
Incident datetime
2023-09-15 00:00 UTC
Report number
Location
TX
Narrative
On august 18, 2023, at 08:00, an explosion and fire occurred at the centerville compressor station 860 in the "a" compressor building which led to major equipment damage within the compressor building. There was a gas release and ignition on unit 10a at tgp 860. Unit 10a is a clark tla-8, with (4) enbloc compressors. The #2 compressor head end unloader (heu) flange cracked in the fillet and released the gas that ignited causing a subsequent fire. At 08:16, an operations employee pulled the manual esd handle to activate the station esd system. Another employee called 911. All employees and contractors working at the station safely evacuated the facility and met at the evacuation point located at the station security gate to confirm all personnel were accounted for. In an abundance of caution local emergency responders evacuated the surrounding area for a few hours. There were no off site impacts. There were no injuries or fatalities. One employee was transported to the hospital with symptoms that were not directly related to the incident. The investigation team determined that the #2 heu assembly had an inherent design flaw from the original equipment manufacturer (oem), with a contributing factor of over torqueing the heu flange during reassembly on monday, august 14, 2023 by the local mechanical crew. The incident investigation report has been provided to PHMSA.
Detailed record list
Report Received Date
2023-09-15 00:00:00
Iyear
2023
Report Number
20230089
Supplemental Number
39425
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
Time Zone
Central
Daylight Savings Ind
No
Location Latitude
35.847984
Location Longitude
-87.449857
Nrc Rpt Num
1376549
Additional Nrc Report Numbers
1376722
Commodity Released Type
Natural Gas
Unintentional Release
2179
Intentional Release
0
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Status When Identified
Routine Start-Up
Shutdown Due Accident Ind
Yes
Still Shutdown Ind
Yes
Communication State Fed Ind
Yes
Party Initiated Communication
Operator
Ignite Ind
Yes
How Extinguished
Operator/contractor
Gas Consumed By Fire In Mcf
2179
Explode Ind
Yes
Num Pub Evacuated
400
On Off Shore
Onshore
Onshore State Abbreviation
Tn
Onshore Postal Code
37033
Onshore City Name
Centerville
Onshore County Name
Hickman
Designated Location
Not Applicable
Pipe Fac Name
Centerville, Tn
Segment Name
Compressor Station 860
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
Compressor
Installation Year
1964
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Other
Leak Type Other
Under Investigation
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
660
Heat Damage Ind
No
Non Heat Damage Ind
No
Did Occur In Mca Ind
Yes
Mca Buildng Human Occupy Ind
Yes
Est Cost Oper Paid
0
Est Cost Unintentional Release
5622
Est Cost Intentional Release
0
Est Cost Prop Damage
27000000
Est Cost Emergency
0
Est Cost Other
0
Gas Cost In Mcf
2.58
Prpty
27005622
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
25
Num Business Building Affctd
5
Wildlife Impact Ind
No
Accident Psig
872
Gas Flow In Pipe In Mcf
1694
Mop Psig
936
Mop Cfr Section
192.619(A)(2)
Maop Established Date
1957-11-01 00:00:00
Maop Reversal Flow Ind
No
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
No
Scada Conf Ind
Yes
Accident Identifier
Local Operating Personnel, Including Contractors
Operator Type
Operator Employee
Investigation Status
Yes, specify investigation result(s): (select all that apply)
Invest No Control Room Ind
Yes
Invest No Controller Ind
Yes
Employee Drug Test Ind
Yes
Contractor Drug Test Ind
No
Num Employees Tested
1
Num Employees Failed
0
Cause
Equipment Failure
Cause Details
Compressor Or Compressor-Related Equipment
Eq Failure Type
Compressor Or Compressor-Related Equipment
Other Compressor Ind
Appurtenance Failure
Additional Defect Ind
Yes
Additional Installation Ind
Yes
Preparer Name
R***** B***** I*
Preparer Title
Engineer - Codes And Standards
Preparer Email
R************@k***********.com
Preparer Telephone
713-420-2324
Authorizer Name
Z*** R*****
Authorizer Title
Director - Engineering Codes And Standards
Authorizer Telephone
713-420-2609
Authorizer Email
Z**********@k***********.com
Narrative
On august 18, 2023, at 08:00, an explosion and fire occurred at the centerville compressor station 860 in the "a" compressor building which led to major equipment damage within the compressor building. There was a gas release and ignition on unit 10a at tgp 860. Unit 10a is a clark tla-8, with (4) enbloc compressors. The #2 compressor head end unloader (heu) flange cracked in the fillet and released the gas that ignited causing a subsequent fire. At 08:16, an operations employee pulled the manual esd handle to activate the station esd system. Another employee called 911. All employees and contractors working at the station safely evacuated the facility and met at the evacuation point located at the station security gate to confirm all personnel were accounted for. In an abundance of caution local emergency responders evacuated the surrounding area for a few hours. There were no off site impacts. There were no injuries or fatalities. One employee was transported to the hospital with symptoms that were not directly related to the incident. The investigation team determined that the #2 heu assembly had an inherent design flaw from the original equipment manufacturer (oem), with a contributing factor of over torqueing the heu flange during reassembly on monday, august 14, 2023 by the local mechanical crew. The incident investigation report has been provided to PHMSA.
| Report Received Date | 2023-09-15 00:00:00 |
|---|---|
| Iyear | 2023 |
| Report Number | 20230089 |
| Supplemental Number | 39425 |
| 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 |
| Time Zone | Central |
| Daylight Savings Ind | No |
| Location Latitude | 35.847984 Google Maps OpenStreetMap |
| Location Longitude | -87.449857 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1376549 NRC Report How to search |
| Additional Nrc Report Numbers | 1376722 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 2179 |
| Intentional Release | 0 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Status When Identified | Routine Start-Up |
| Shutdown Due Accident Ind | Yes |
| Still Shutdown Ind | Yes |
| Communication State Fed Ind | Yes |
| Party Initiated Communication | Operator |
| Ignite Ind | Yes |
| How Extinguished | Operator/contractor |
| Gas Consumed By Fire In Mcf | 2179 |
| Explode Ind | Yes |
| Num Pub Evacuated | 400 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Tn |
| Onshore Postal Code | 37033 |
| Onshore City Name | Centerville |
| Onshore County Name | Hickman |
| Designated Location | Not Applicable |
| Pipe Fac Name | Centerville, Tn |
| Segment Name | Compressor Station 860 |
| 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 | Compressor |
| Installation Year | 1964 |
| Manufactured Year | Unknown |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Other |
| Leak Type Other | Under Investigation |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 660 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Did Occur In Mca Ind | Yes |
| Mca Buildng Human Occupy Ind | Yes |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 5622 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 27000000 |
| Est Cost Emergency | 0 |
| Est Cost Other | 0 |
| Gas Cost In Mcf | 2.58 |
| Prpty | 27005622 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 25 |
| Num Business Building Affctd | 5 |
| Wildlife Impact Ind | No |
| Accident Psig | 872 |
| Gas Flow In Pipe In Mcf | 1694 |
| Mop Psig | 936 |
| Mop Cfr Section | 192.619(A)(2) View CFR 49 §192 |
| Maop Established Date | 1957-11-01 00:00:00 |
| Maop Reversal Flow Ind | No |
| 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 | No |
| Scada Conf Ind | Yes |
| Accident Identifier | Local Operating Personnel, Including Contractors |
| Operator Type | Operator Employee |
| Investigation Status | Yes, specify investigation result(s): (select all that apply) |
| Invest No Control Room Ind | Yes |
| Invest No Controller Ind | Yes |
| Employee Drug Test Ind | Yes |
| Contractor Drug Test Ind | No |
| Num Employees Tested | 1 |
| Num Employees Failed | 0 |
| Cause | Equipment Failure |
| Cause Details | Compressor Or Compressor-Related Equipment |
| Eq Failure Type | Compressor Or Compressor-Related Equipment |
| Other Compressor Ind | Appurtenance Failure |
| Additional Defect Ind | Yes |
| Additional Installation Ind | Yes |
| Preparer Name | R***** B***** I* |
| Preparer Title | Engineer - Codes And Standards |
| Preparer Email | R************@k***********.com |
| Preparer Telephone | 713-420-2324 |
| Authorizer Name | Z*** R***** |
| Authorizer Title | Director - Engineering Codes And Standards |
| Authorizer Telephone | 713-420-2609 |
| Authorizer Email | Z**********@k***********.com |
| Narrative | On august 18, 2023, at 08:00, an explosion and fire occurred at the centerville compressor station 860 in the "a" compressor building which led to major equipment damage within the compressor building. There was a gas release and ignition on unit 10a at tgp 860. Unit 10a is a clark tla-8, with (4) enbloc compressors. The #2 compressor head end unloader (heu) flange cracked in the fillet and released the gas that ignited causing a subsequent fire. At 08:16, an operations employee pulled the manual esd handle to activate the station esd system. Another employee called 911. All employees and contractors working at the station safely evacuated the facility and met at the evacuation point located at the station security gate to confirm all personnel were accounted for. In an abundance of caution local emergency responders evacuated the surrounding area for a few hours. There were no off site impacts. There were no injuries or fatalities. One employee was transported to the hospital with symptoms that were not directly related to the incident. The investigation team determined that the #2 heu assembly had an inherent design flaw from the original equipment manufacturer (oem), with a contributing factor of over torqueing the heu flange during reassembly on monday, august 14, 2023 by the local mechanical crew. The incident investigation report has been provided to PHMSA. |
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