Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2023-10-13 — TX
Operator
Kinder Morgan Texas Pipeline Co
Cause
Equipment Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$231,633
Incident datetime
2023-10-13 00:00 UTC
Report number
Location
TX
Narrative
On july 28, 2023 kinder morgan operations was made aware of audible gas leak. A kinder morgan crude and condensate (kmcc) corrosion technician was working at a shared site with index 145 mlv 759 and heard what appeared to sound like a gas leak. Operations were dispatched to valve site. Operations measured the leak and determined it was due to a valve stem leak. Operations gathered further information and secured the site. Plans were made to begin excavation on july 31, 2023 to further investigate. Investigation determined a valve packing repair would not be sufficient. The valve would need to be replaced due age and inability to repack the valve stem. The style of valve is an older model walworth gate valve. The original cost estimate to replace the valve was $120,000. The pipeline index 145 serves several major power plants. Due to low severity of the leak and ercot guidance, an outage to replace the valve was scheduled for september when demand would not be as high. Due to unforeseen installation changes in scope of work to replace the new valve, the cost as of september 15, 2023 were forecasted to exceed $139,700. This incident and repair is now deemed PHMSA reportable due to the repair cost exceeding $139,700. Total unintentional gas loss of 240 mcf.
Detailed record list
Report Received Date
2023-10-13 00:00:00
Iyear
2023
Report Number
20230094
Supplemental Number
39017
Report Type
Supplemental Final
Operator Id
31451
Name
Kinder Morgan Texas Pipeline Co
Operator Street Address
1001 Louisiana St, Ste 1000
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77002
Time Zone
Central
Daylight Savings Ind
No
Location Latitude
29.58271705
Location Longitude
-95.4305045
Nrc Rpt Num
1379222
Additional Nrc Report Numbers
1379356
Commodity Released Type
Natural Gas
Unintentional Release
240
Intentional Release
18019
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
Could Not Bring The Line Down Per Guidance From Ercot
Communication State Fed Ind
No
Ignite Ind
No
Upstream Action Taken
Operational Control
Upstream Oprtnl Cntrl Detail
Minor Valve Stem Leak Continued Normal Operation
Downstream Action Taken
Operational Control
Downstream Oprtnl Cntrl Detail
Minor Valve Stem Leak Continued Normal Operation
Num Pub Evacuated
0
On Off Shore
Onshore
Onshore State Abbreviation
Tx
Onshore Postal Code
77085
Onshore City Name
Pearland
Onshore County Name
Brazoria
Designated Location
Milepost
Designated Name
19.50
Pipe Fac Name
Index 145
Segment Name
Valve Site Mlv 759
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
Intrastate
System Part Involved
Onshore Pipeline, Including Valve Sites
Item Involved
Valve
Valve Type
Mainline
Valve Mainline Type
Gate
Valve Manufacturer
Walworth
Installation Year
Unknown
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Seal Or Packing
Class Location Type
Class 3 Location
Could Be Hca
Yes
Determination Method
Method2
Pir Radius
618
Heat Damage Ind
No
Non Heat Damage Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
634
Est Cost Intentional Release
47570
Est Cost Prop Damage
231633
Est Cost Emergency
0
Est Cost Other
0
Gas Cost In Mcf
2.64
Prpty
279837
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
704
Gas Flow In Pipe In Mcf
206595
Mop Psig
780
Mop Cfr Section
192.619(A)(2)
Maop Established Date
1954-01-19 00:00:00
Maop Reversal Flow Ind
Bi-Directional
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Gas Required Odorized Ind
No
Length Segment Isolated
68957
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
Controllers were not involved with incident.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Equipment Failure
Cause Details
Non-Threaded Connection Failure
Eq Failure Type
Non-Threaded Connection Failure
Other Non Threaded Ind
Seal (Not Compressor Seal) Or Packing
Eq Additional Other Ind
Yes
Eq Additional Other Details
Valve Stem Leak
Preparer Name
R***** B*****
Preparer Title
Engineer - Codes And Standards
Preparer Email
R************@k***********.com
Preparer Telephone
713-420-2324
Authorizer Name
J**** H********
Authorizer Title
Director - Engineering Codes And Standards
Authorizer Telephone
713-369-9443
Authorizer Email
J**************@k***********.com
Narrative
On july 28, 2023 kinder morgan operations was made aware of audible gas leak. A kinder morgan crude and condensate (kmcc) corrosion technician was working at a shared site with index 145 mlv 759 and heard what appeared to sound like a gas leak. Operations were dispatched to valve site. Operations measured the leak and determined it was due to a valve stem leak. Operations gathered further information and secured the site. Plans were made to begin excavation on july 31, 2023 to further investigate. Investigation determined a valve packing repair would not be sufficient. The valve would need to be replaced due age and inability to repack the valve stem. The style of valve is an older model walworth gate valve. The original cost estimate to replace the valve was $120,000. The pipeline index 145 serves several major power plants. Due to low severity of the leak and ercot guidance, an outage to replace the valve was scheduled for september when demand would not be as high. Due to unforeseen installation changes in scope of work to replace the new valve, the cost as of september 15, 2023 were forecasted to exceed $139,700. This incident and repair is now deemed PHMSA reportable due to the repair cost exceeding $139,700. Total unintentional gas loss of 240 mcf.
| Report Received Date | 2023-10-13 00:00:00 |
|---|---|
| Iyear | 2023 |
| Report Number | 20230094 |
| Supplemental Number | 39017 |
| Report Type | Supplemental Final |
| Operator Id | 31451 PHMSA Enforcement |
| Name | Kinder Morgan Texas Pipeline Co |
| Operator Street Address | 1001 Louisiana St, Ste 1000 |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77002 |
| Time Zone | Central |
| Daylight Savings Ind | No |
| Location Latitude | 29.58271705 Google Maps OpenStreetMap |
| Location Longitude | -95.4305045 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1379222 NRC Report How to search |
| Additional Nrc Report Numbers | 1379356 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 240 |
| Intentional Release | 18019 |
| 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 | Could Not Bring The Line Down Per Guidance From Ercot |
| Communication State Fed Ind | No |
| Ignite Ind | No |
| Upstream Action Taken | Operational Control |
| Upstream Oprtnl Cntrl Detail | Minor Valve Stem Leak Continued Normal Operation |
| Downstream Action Taken | Operational Control |
| Downstream Oprtnl Cntrl Detail | Minor Valve Stem Leak Continued Normal Operation |
| Num Pub Evacuated | 0 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Tx |
| Onshore Postal Code | 77085 |
| Onshore City Name | Pearland |
| Onshore County Name | Brazoria |
| Designated Location | Milepost |
| Designated Name | 19.50 |
| Pipe Fac Name | Index 145 |
| Segment Name | Valve Site Mlv 759 |
| 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 | Intrastate |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| Item Involved | Valve |
| Valve Type | Mainline |
| Valve Mainline Type | Gate |
| Valve Manufacturer | Walworth |
| Installation Year | Unknown |
| Manufactured Year | Unknown |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Seal Or Packing |
| Class Location Type | Class 3 Location |
| Could Be Hca | Yes |
| Determination Method | Method2 |
| Pir Radius | 618 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 634 |
| Est Cost Intentional Release | 47570 |
| Est Cost Prop Damage | 231633 |
| Est Cost Emergency | 0 |
| Est Cost Other | 0 |
| Gas Cost In Mcf | 2.64 |
| Prpty | 279837 |
| 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 | 704 |
| Gas Flow In Pipe In Mcf | 206595 |
| Mop Psig | 780 |
| Mop Cfr Section | 192.619(A)(2) View CFR 49 §192 |
| Maop Established Date | 1954-01-19 00:00:00 |
| Maop Reversal Flow Ind | Bi-Directional |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | No |
| Gas Required Odorized Ind | No |
| Length Segment Isolated | 68957 |
| 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 | Controllers were not involved with incident. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Equipment Failure |
| Cause Details | Non-Threaded Connection Failure |
| Eq Failure Type | Non-Threaded Connection Failure |
| Other Non Threaded Ind | Seal (Not Compressor Seal) Or Packing |
| Eq Additional Other Ind | Yes |
| Eq Additional Other Details | Valve Stem Leak |
| Preparer Name | R***** B***** |
| Preparer Title | Engineer - Codes And Standards |
| Preparer Email | R************@k***********.com |
| Preparer Telephone | 713-420-2324 |
| Authorizer Name | J**** H******** |
| Authorizer Title | Director - Engineering Codes And Standards |
| Authorizer Telephone | 713-369-9443 |
| Authorizer Email | J**************@k***********.com |
| Narrative | On july 28, 2023 kinder morgan operations was made aware of audible gas leak. A kinder morgan crude and condensate (kmcc) corrosion technician was working at a shared site with index 145 mlv 759 and heard what appeared to sound like a gas leak. Operations were dispatched to valve site. Operations measured the leak and determined it was due to a valve stem leak. Operations gathered further information and secured the site. Plans were made to begin excavation on july 31, 2023 to further investigate. Investigation determined a valve packing repair would not be sufficient. The valve would need to be replaced due age and inability to repack the valve stem. The style of valve is an older model walworth gate valve. The original cost estimate to replace the valve was $120,000. The pipeline index 145 serves several major power plants. Due to low severity of the leak and ercot guidance, an outage to replace the valve was scheduled for september when demand would not be as high. Due to unforeseen installation changes in scope of work to replace the new valve, the cost as of september 15, 2023 were forecasted to exceed $139,700. This incident and repair is now deemed PHMSA reportable due to the repair cost exceeding $139,700. Total unintentional gas loss of 240 mcf. |
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