Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2023-03-01 — TX
Operator
Anr Pipeline Co
Cause
Equipment Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$2,000
Incident datetime
2023-03-01 00:00 UTC
Report number
Location
TX
Narrative
On february 4, 2023, an unintentional release of 6.7 million cubic feet of natural gas occurred when a 2-inch 2-piece, threaded valve pulled apart, on the high-pressure dump line on the well head separator. A technician was nearby at the time of the release. No injuries, no fatalities and no damages were reported. The isolation plan generated for the section required lateral valves to be closed and the release was isolated within 78 minutes. After the natural gas release, there was a small release of crude oil that is a byproduct of the storage well system. A primary cause of the equipment failure has yet to be determined as the incident is currently under investigation. A supplement report will be filed upon the completion of the investigation. Update 7/3/2023 failure investigation final summary report the results of the analysis indicate that the ball valve and threaded connection failed due to expansion of the female threaded section on the ball valve, most likely as a result of water freezing inside the valve. The expansion led to partial disengagement of the male threads on the threaded connection and the female threads on the valve body. An axil tensile stress, likely from the freezing water acting on the valve and threaded connection resulted in deformation of the of male threads from the threaded connections. Which separated the valve body from the male threaded connection.
Detailed record list
Report Received Date
2023-03-01 00:00:00
Iyear
2023
Report Number
20230021
Supplemental Number
39587
Report Type
Supplemental Final
Operator Id
Name
Anr Pipeline Co
Operator Street Address
700 Louisiana Street Suite 700
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77002
Time Zone
Eastern
Daylight Savings Ind
Yes
Location Latitude
43.90763
Location Longitude
-85.5479
Nrc Rpt Num
1359266
Additional Nrc Report Numbers
13,594,141,359,270
Commodity Released Type
Natural Gas
Unintentional Release
6675
Intentional Release
0
Accompanying Liquid
15
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
2-Inch Threaded Valve Pulled Apart On Dump Line Well Separator
Communication State Fed Ind
No
Ignite Ind
No
Num Pub Evacuated
0
On Off Shore
Onshore
Onshore State Abbreviation
Mi
Onshore Postal Code
49677
Onshore City Name
Loreed
Onshore County Name
Osceola
Designated Location
Not Applicable
Pipe Fac Name
Anr
Segment Name
Loreed Lr Well 56-4
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
Aboveground Storage, Including Associated Equipment And Piping
Item Involved
Valve
Valve Type
Auxiliary Or Other Valve
Installation Year
Unknown
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Other
Release Type Details
2-Inch, 2-Piece, Threaded Valve Pulled Apart, On The Dump Line On Well Head Separator.
Class Location Type
Class 1 Location
Could Be Hca
No
Not Flammable Ind
Not Flammable
Heat Damage Ind
No
Non Heat Damage Ind
No
Did Occur In Mca Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
23096
Est Cost Intentional Release
0
Est Cost Prop Damage
2000
Est Cost Emergency
0
Est Cost Other
163093
Est Cost Other Details
Small Release Of Crude-Oil That Is A Byproduct Of The Well.
Gas Cost In Mcf
3.46
Prpty
188189
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
1200
Gas Flow In Pipe In Mcf
0
Mop Psig
2000
Mop Cfr Section
192.619(A)(1)
Maop Established Date
1973-08-19 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 In Storage Field
Scada In Place Ind
No
Accident Identifier
Local Operating Personnel, Including Contractors
Operator Type
Operator Employee
Investigation Status
No, the facility was not monitored by a controller(s) at the time of the incident
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Equipment Failure
Cause Details
Threaded Connection/coupling Failure
Eq Failure Type
Threaded Connection/coupling Failure
Other Stripped Ind
Valve Threads
Additional Valve Ind
Yes
Preparer Name
R****** P******
Preparer Title
Compliance Specialist
Preparer Email
R**************@t*******.com
Preparer Telephone
248.561.7803
Local Contact Name
R****** P******
Local Contact Email
R**************@t*******.com
Local Contact Telephone
248.561.7803
Authorizer Name
S******** F*****
Authorizer Title
Manager Regulatory Compliance
Authorizer Telephone
304.550.5162
Authorizer Email
S***************@t*******.com
Narrative
On february 4, 2023, an unintentional release of 6.7 million cubic feet of natural gas occurred when a 2-inch 2-piece, threaded valve pulled apart, on the high-pressure dump line on the well head separator. A technician was nearby at the time of the release. No injuries, no fatalities and no damages were reported. The isolation plan generated for the section required lateral valves to be closed and the release was isolated within 78 minutes. After the natural gas release, there was a small release of crude oil that is a byproduct of the storage well system. A primary cause of the equipment failure has yet to be determined as the incident is currently under investigation. A supplement report will be filed upon the completion of the investigation. Update 7/3/2023 failure investigation final summary report the results of the analysis indicate that the ball valve and threaded connection failed due to expansion of the female threaded section on the ball valve, most likely as a result of water freezing inside the valve. The expansion led to partial disengagement of the male threads on the threaded connection and the female threads on the valve body. An axil tensile stress, likely from the freezing water acting on the valve and threaded connection resulted in deformation of the of male threads from the threaded connections. Which separated the valve body from the male threaded connection.
| Report Received Date | 2023-03-01 00:00:00 |
|---|---|
| Iyear | 2023 |
| Report Number | 20230021 |
| Supplemental Number | 39587 |
| Report Type | Supplemental Final |
| Operator Id | 405 PHMSA Enforcement |
| Name | Anr Pipeline Co |
| Operator Street Address | 700 Louisiana Street Suite 700 |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77002 |
| Time Zone | Eastern |
| Daylight Savings Ind | Yes |
| Location Latitude | 43.90763 Google Maps OpenStreetMap |
| Location Longitude | -85.5479 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1359266 NRC Report How to search |
| Additional Nrc Report Numbers | 13,594,141,359,270 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 6675 |
| Intentional Release | 0 |
| Accompanying Liquid | 15 |
| 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 | 2-Inch Threaded Valve Pulled Apart On Dump Line Well Separator |
| Communication State Fed Ind | No |
| Ignite Ind | No |
| Num Pub Evacuated | 0 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Mi |
| Onshore Postal Code | 49677 |
| Onshore City Name | Loreed |
| Onshore County Name | Osceola |
| Designated Location | Not Applicable |
| Pipe Fac Name | Anr |
| Segment Name | Loreed Lr Well 56-4 |
| 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 | Aboveground Storage, Including Associated Equipment And Piping |
| Item Involved | Valve |
| Valve Type | Auxiliary Or Other Valve |
| Installation Year | Unknown |
| Manufactured Year | Unknown |
| Material Involved | Carbon Steel |
| Release Type | Other |
| Release Type Details | 2-Inch, 2-Piece, Threaded Valve Pulled Apart, On The Dump Line On Well Head Separator. |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Not Flammable Ind | Not Flammable |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Did Occur In Mca Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 23096 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 2000 |
| Est Cost Emergency | 0 |
| Est Cost Other | 163093 |
| Est Cost Other Details | Small Release Of Crude-Oil That Is A Byproduct Of The Well. |
| Gas Cost In Mcf | 3.46 |
| Prpty | 188189 |
| 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 | 1200 |
| Gas Flow In Pipe In Mcf | 0 |
| Mop Psig | 2000 |
| Mop Cfr Section | 192.619(A)(1) View CFR 49 §192 |
| Maop Established Date | 1973-08-19 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 In Storage Field |
| Scada In Place Ind | No |
| Accident Identifier | Local Operating Personnel, Including Contractors |
| Operator Type | Operator Employee |
| Investigation Status | No, the facility was not monitored by a controller(s) at the time of the incident |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Equipment Failure |
| Cause Details | Threaded Connection/coupling Failure |
| Eq Failure Type | Threaded Connection/coupling Failure |
| Other Stripped Ind | Valve Threads |
| Additional Valve Ind | Yes |
| Preparer Name | R****** P****** |
| Preparer Title | Compliance Specialist |
| Preparer Email | R**************@t*******.com |
| Preparer Telephone | 248.561.7803 |
| Local Contact Name | R****** P****** |
| Local Contact Email | R**************@t*******.com |
| Local Contact Telephone | 248.561.7803 |
| Authorizer Name | S******** F***** |
| Authorizer Title | Manager Regulatory Compliance |
| Authorizer Telephone | 304.550.5162 |
| Authorizer Email | S***************@t*******.com |
| Narrative | On february 4, 2023, an unintentional release of 6.7 million cubic feet of natural gas occurred when a 2-inch 2-piece, threaded valve pulled apart, on the high-pressure dump line on the well head separator. A technician was nearby at the time of the release. No injuries, no fatalities and no damages were reported. The isolation plan generated for the section required lateral valves to be closed and the release was isolated within 78 minutes. After the natural gas release, there was a small release of crude oil that is a byproduct of the storage well system. A primary cause of the equipment failure has yet to be determined as the incident is currently under investigation. A supplement report will be filed upon the completion of the investigation. Update 7/3/2023 failure investigation final summary report the results of the analysis indicate that the ball valve and threaded connection failed due to expansion of the female threaded section on the ball valve, most likely as a result of water freezing inside the valve. The expansion led to partial disengagement of the male threads on the threaded connection and the female threads on the valve body. An axil tensile stress, likely from the freezing water acting on the valve and threaded connection resulted in deformation of the of male threads from the threaded connections. Which separated the valve body from the male threaded connection. |
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