Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2025-08-14 — KS
Operator
Flint Hills Resources, Lc
Cause
Equipment Failure
Commodity
Hvl Or Other Flammable Or Toxic Fluid Which Is A Gas At Ambient Conditions
Program
HL
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$500
Incident datetime
2025-08-14 00:06
Report number
Location
KS
Narrative
Fhr was notified by a 3rd party operator of a potential release at the 501e mustang skid. Fhr operations personnel arrived onsite at approximately 12:01am on 8/14/25 and observed a fugitive emission with a small ice ball. The tubing was isolated and was replaced by ~03:00. The initial release estimate was determined by calculating how much product was contained in the 4� prover arm, valve body, and thermal body relief tubing (approximately 1 gallon of propylene). The root cause investigation began in the field later that afternoon. It was discovered that the tubing connection could have seen pipeline pressure since the release point on the tubing was located after a check valve on the tubing assembly. At ~6:40 pm, the release volume was re-calculated taking the new information into account, and it was determined that the release volume could have been approx. 52 gallons. Fhr gathered the remaining required information and reported the release to the trrc at ~ 7:40 pm. The tubing has been sent to a 3rd party lab as part of the root cause investigation.
Detailed record list
Report Received Date
2025-09-11 00:00:00
Iyear
2025
Report Number
20250218
Supplemental Number
41363
Report Type
Original
Operator Id
22855
Name
Flint Hills Resources, Lc
Operator Street Address
4111 East 37th Street North
Operator City Name
Wichita
Operator State Abbreviation
KS
Operator Postal Code
67220
Local Datetime
2025-08-13 23:51:00
Time Zone
Central
Daylight Savings Ind
No
Location Latitude
29.8588532
Location Longitude
-94.895476
Commodity Released Type
Hvl Or Other Flammable Or Toxic Fluid Which Is A Gas At Ambient Conditions
Commodity Subtype
Other Hvl
Commodity Details
Propylene
Unintentional Release Bbls
1.23
Intentional Release Bbls
0
Recovered Bbls
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Other
Accident Details
3rd Party Operator Notified Fhr On-Call
Incident Identified Datetime
2025-08-14 00:06:00
System Part Involved
Onshore Pump/meter Station Equipment And Piping
On Off Shore
Onshore
Status When Identified
Normal Operation, Includes Pauses Between Batches And During Maintenance
Shutdown Due Accident Ind
No
Shutdown Explain
Able To Isolate Failed Tubing From The Pipeline.
Communication State Fed Ind
No
On Site Datetime
2025-08-13 00:01:00
Confirmed Discovery Datetime
2025-08-13 00:06:00
Nrc Rpt Num
Nrc Notification Not Required
Ignite Ind
No
Num Pub Evacuated
0
Pipe Fac Name
Pipeline 501e
Segment Name
80150105
Onshore State Abbreviation
Tx
Onshore Postal Code
77523
Onshore City Name
Mont Belvieu
Onshore County Name
Chambers
Designated Location
Survey Station No.
Designated Name
10+42
Federal
No
Location Type
Totally Contained On Operator-Controlled Property
Incident Area Type
Aboveground
Incident Area Subtype
Typical Aboveground Facility Piping Or Appurtenance
Crossing
No
Pipe Facility Type
Intrastate
Item Involved
Tubing
Tubing Material
Stainless Steel
Tubing Type
Rigid
Installation Year
2024
Manufactured Year
Unknown
Material Involved
Material Other Than Carbon Steel
Material Details
Stainless Steel
Release Type
Leak
Leak Type
Other
Leak Type Other
Pending Investigation Results
Wildlife Impact Ind
No
Soil Contamination
No
Long Term Assessment
No
Remediation Ind
No
Water Contam Ind
No
Could Be Hca
Yes
Commodity Reached Hca
Yes
High Pop Ind
Yes
High Pop Yes No
Yes
Est Cost Oper Paid
0
Est Cost Gas Released
71
Est Cost Prop Damage
500
Est Cost Emergency
0
Est Cost Environmental
0
Est Cost Other
0
Prpty
571
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
0
Num Business Building Affctd
0
Accident Psig
1229
Mop Psig
1440
Mop Cfr Section
Subpart E Pressure Test �195.406(A)(3)
Maop Established Date
2024-02-19 00:00:00
Maop Reversal Flow Ind
No
Accident Pressure
Pressure Did Not Exceed Mop
Pressure Restriction Ind
No
Pipeline Function
> 20% Smys Regulated Transmission
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
No
Scada Conf Ind
No
Cpm In Place Ind
Yes
Cpm Operating Ind
Yes
Cpm Functional Ind
Yes
Cpm Detection Ind
No
Cpm Conf Ind
No
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
It was determined that neither controller actions, nor control room issues contributed to the accident.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Equipment Failure
Cause Details
Other Equipment Failure
Eq Failure Type
Other Equipment Failure
Failure Details
Pending Lab Results Of Affected Equipment
Eq Additional Other Ind
Yes
Eq Additional Other Details
Pending Lab Results Of Affected Equipment
Preparer Name
M***** P****
Preparer Title
Compliance Program Specialist
Preparer Email
M***********@f**.com
Preparer Telephone
361-242-8781
Prepared Date
2025-09-11 00:00:00
Authorizer Name
M**** T*****
Authorizer Telephone
409-273-9482
Authorizer Title
Senior Compliance Specialist
Authorizer Email
M***********@f**.com
Narrative
Fhr was notified by a 3rd party operator of a potential release at the 501e mustang skid. Fhr operations personnel arrived onsite at approximately 12:01am on 8/14/25 and observed a fugitive emission with a small ice ball. The tubing was isolated and was replaced by ~03:00. The initial release estimate was determined by calculating how much product was contained in the 4� prover arm, valve body, and thermal body relief tubing (approximately 1 gallon of propylene). The root cause investigation began in the field later that afternoon. It was discovered that the tubing connection could have seen pipeline pressure since the release point on the tubing was located after a check valve on the tubing assembly. At ~6:40 pm, the release volume was re-calculated taking the new information into account, and it was determined that the release volume could have been approx. 52 gallons. Fhr gathered the remaining required information and reported the release to the trrc at ~ 7:40 pm. The tubing has been sent to a 3rd party lab as part of the root cause investigation.
| Report Received Date | 2025-09-11 00:00:00 |
|---|---|
| Iyear | 2025 |
| Report Number | 20250218 |
| Supplemental Number | 41363 |
| Report Type | Original |
| Operator Id | 22855 PHMSA Enforcement |
| Name | Flint Hills Resources, Lc |
| Operator Street Address | 4111 East 37th Street North |
| Operator City Name | Wichita |
| Operator State Abbreviation | KS |
| Operator Postal Code | 67220 |
| Local Datetime | 2025-08-13 23:51:00 |
| Time Zone | Central |
| Daylight Savings Ind | No |
| Location Latitude | 29.8588532 Google Maps OpenStreetMap |
| Location Longitude | -94.895476 Google Maps OpenStreetMap |
| Commodity Released Type | Hvl Or Other Flammable Or Toxic Fluid Which Is A Gas At Ambient Conditions |
| Commodity Subtype | Other Hvl |
| Commodity Details | Propylene |
| Unintentional Release Bbls | 1.23 |
| Intentional Release Bbls | 0 |
| Recovered Bbls | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Other |
| Accident Details | 3rd Party Operator Notified Fhr On-Call |
| Incident Identified Datetime | 2025-08-14 00:06:00 |
| System Part Involved | Onshore Pump/meter Station Equipment And Piping |
| On Off Shore | Onshore |
| Status When Identified | Normal Operation, Includes Pauses Between Batches And During Maintenance |
| Shutdown Due Accident Ind | No |
| Shutdown Explain | Able To Isolate Failed Tubing From The Pipeline. |
| Communication State Fed Ind | No |
| On Site Datetime | 2025-08-13 00:01:00 |
| Confirmed Discovery Datetime | 2025-08-13 00:06:00 |
| Nrc Rpt Num | Nrc Notification Not Required NRC Report How to search |
| Ignite Ind | No |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Pipeline 501e |
| Segment Name | 80150105 |
| Onshore State Abbreviation | Tx |
| Onshore Postal Code | 77523 |
| Onshore City Name | Mont Belvieu |
| Onshore County Name | Chambers |
| Designated Location | Survey Station No. |
| Designated Name | 10+42 |
| Federal | No |
| Location Type | Totally Contained On Operator-Controlled Property |
| Incident Area Type | Aboveground |
| Incident Area Subtype | Typical Aboveground Facility Piping Or Appurtenance |
| Crossing | No |
| Pipe Facility Type | Intrastate |
| Item Involved | Tubing |
| Tubing Material | Stainless Steel |
| Tubing Type | Rigid |
| Installation Year | 2024 |
| Manufactured Year | Unknown |
| Material Involved | Material Other Than Carbon Steel |
| Material Details | Stainless Steel |
| Release Type | Leak |
| Leak Type | Other |
| Leak Type Other | Pending Investigation Results |
| Wildlife Impact Ind | No |
| Soil Contamination | No |
| Long Term Assessment | No |
| Remediation Ind | No |
| Water Contam Ind | No |
| Could Be Hca | Yes |
| Commodity Reached Hca | Yes |
| High Pop Ind | Yes |
| High Pop Yes No | Yes |
| Est Cost Oper Paid | 0 |
| Est Cost Gas Released | 71 |
| Est Cost Prop Damage | 500 |
| Est Cost Emergency | 0 |
| Est Cost Environmental | 0 |
| Est Cost Other | 0 |
| Prpty | 571 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 0 |
| Num Business Building Affctd | 0 |
| Accident Psig | 1229 |
| Mop Psig | 1440 |
| Mop Cfr Section | Subpart E Pressure Test �195.406(A)(3) View CFR 49 §192 |
| Maop Established Date | 2024-02-19 00:00:00 |
| Maop Reversal Flow Ind | No |
| Accident Pressure | Pressure Did Not Exceed Mop |
| Pressure Restriction Ind | No |
| Pipeline Function | > 20% Smys Regulated Transmission |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | No |
| Scada Conf Ind | No |
| Cpm In Place Ind | Yes |
| Cpm Operating Ind | Yes |
| Cpm Functional Ind | Yes |
| Cpm Detection Ind | No |
| Cpm Conf Ind | No |
| 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 | It was determined that neither controller actions, nor control room issues contributed to the accident. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Equipment Failure |
| Cause Details | Other Equipment Failure |
| Eq Failure Type | Other Equipment Failure |
| Failure Details | Pending Lab Results Of Affected Equipment |
| Eq Additional Other Ind | Yes |
| Eq Additional Other Details | Pending Lab Results Of Affected Equipment |
| Preparer Name | M***** P**** |
| Preparer Title | Compliance Program Specialist |
| Preparer Email | M***********@f**.com |
| Preparer Telephone | 361-242-8781 |
| Prepared Date | 2025-09-11 00:00:00 |
| Authorizer Name | M**** T***** |
| Authorizer Telephone | 409-273-9482 |
| Authorizer Title | Senior Compliance Specialist |
| Authorizer Email | M***********@f**.com |
| Narrative | Fhr was notified by a 3rd party operator of a potential release at the 501e mustang skid. Fhr operations personnel arrived onsite at approximately 12:01am on 8/14/25 and observed a fugitive emission with a small ice ball. The tubing was isolated and was replaced by ~03:00. The initial release estimate was determined by calculating how much product was contained in the 4� prover arm, valve body, and thermal body relief tubing (approximately 1 gallon of propylene). The root cause investigation began in the field later that afternoon. It was discovered that the tubing connection could have seen pipeline pressure since the release point on the tubing was located after a check valve on the tubing assembly. At ~6:40 pm, the release volume was re-calculated taking the new information into account, and it was determined that the release volume could have been approx. 52 gallons. Fhr gathered the remaining required information and reported the release to the trrc at ~ 7:40 pm. The tubing has been sent to a 3rd party lab as part of the root cause investigation. |
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