Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2024-07-17 — MT
Operator
Cenex Pipeline Llc
Cause
Equipment Failure
Commodity
Refined And/or Petroleum Product (Non-Hvl) Which Is A Liquid At Ambient Conditions
Program
HL
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$3,000
Incident datetime
2024-07-17 00:00 UTC
Report number
Location
MT
Narrative
On june 19, 2024 at approximately 11:34 a.M., field personnel were on-site monitoring a recently installed vibration sensor when a 1" diameter schedule 80 pipe used for thermal relief off the discharge side of mainline pump unit 403 ruptured. Field personnel witnessed the pipe vibrating when the pumps were shutdown, resulting in the release and immediately notified the control room and notified a cenex pipeline qi. Since the segment was already shutdown, the controller further isolated the segment by closing the nearest upstream and downstream remotely operated valves. There was approximately 1 barrel of diesel released which was captured for disposal. Cenex pipeline notified the north dakota department of environmental quality of this event. The failed connection was sent to a third-party vendor for failure analysis. The root cause of this incident was identified as fatigue cracking of a threaded/back welded connection. Contributing factors included vibration and inadequate support. The relief line was replaced with adequately supported stainless tubing and the associated pump is being rebuilt and rebalanced. Additional corrective actions related to this incident are underway.
Detailed record list
Report Received Date
2024-07-17 00:00:00
Iyear
2024
Report Number
20240169
Supplemental Number
40386
Report Type
Supplemental Final
Operator Id
2170
Name
Cenex Pipeline Llc
Operator Street Address
803 Hwy 212 S (Po Box 909)
Operator City Name
Laurel
Operator State Abbreviation
MT
Operator Postal Code
59044
Time Zone
Central
Daylight Savings Ind
Yes
Location Latitude
48.22885
Location Longitude
-101.36906
Commodity Released Type
Refined And/or Petroleum Product (Non-Hvl) Which Is A Liquid At Ambient Conditions
Commodity Subtype
Diesel, Fuel Oil, Kerosene, Jet Fuel
Unintentional Release Bbls
1
Recovered Bbls
1
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Local Operating Personnel, Including Contractors
Operator Type
Operator Employee
System Part Involved
Onshore Pump/meter Station Equipment And Piping
On Off Shore
Onshore
Status When Identified
Routine Shutdown
Communication State Fed Ind
Yes
Party Initiated Communication
Operator
Nrc Rpt Num
Nrc Notification Not Required
Ignite Ind
No
Notify Qualified Indiv Ind
Yes
Oil Spill Removal Org Ind
No
Num Pub Evacuated
0
Pipe Fac Name
Minot Pump Station
Segment Name
Minot To Fargo
Onshore State Abbreviation
Nd
Onshore Postal Code
58701
Onshore City Name
Not Within A Municipality
Onshore County Name
Ward
Designated Location
Survey Station No.
Designated Name
Minot Pump St
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
Interstate
Item Involved
Relief Line And Relief Equipment
Installation Year
Unknown
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Other
Release Type Details
1" Schedule 80 Piping Failed At A Back-Welded Threaded Connection
Wildlife Impact Ind
No
Soil Contamination
Yes
Long Term Assessment
No
Remediation Ind
No
Water Contam Ind
No
Could Be Hca
Yes
Commodity Reached Hca
No
Est Cost Oper Paid
0
Est Cost Gas Released
140
Est Cost Prop Damage
3000
Est Cost Emergency
5000
Est Cost Environmental
1000
Est Cost Other
500
Est Cost Other Details
Costs Of Preparing Phmsa Report.
Prpty
9640
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
0
Num Business Building Affctd
0
Accident Psig
946
Mop Psig
1440
Mop Cfr Section
Internal Design Pressure �195.406(A)(1)
Maop Established Date
1990-01-01 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
The controller did not receive alarms via scada or leak detection because the volume lost didn't meet any thresholds for alarm. The controller took appropriate corrective action by shutting down the pumps, allowing product to gravity feed away from the location and isolating the segment associated with the release.
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
Threaded Fitting
Additional Vibration Ind
Yes
Additional Support Ind
Yes
Preparer Name
M******* L** S*****
Preparer Title
Principal Dot Compliance
Preparer Email
M**************@c*****.com
Preparer Telephone
4066285293
Prepared Date
2025-01-07 00:00:00
Local Contact Name
C**** M*******
Local Contact Email
C*************@c*****.com
Local Contact Telephone
406-628-5200
Authorizer Name
G*** B****
Authorizer Telephone
4066285200
Authorizer Title
Vp Pipelines And Terminals
Authorizer Email
G*********@c*****.comc
Narrative
On june 19, 2024 at approximately 11:34 a.M., field personnel were on-site monitoring a recently installed vibration sensor when a 1" diameter schedule 80 pipe used for thermal relief off the discharge side of mainline pump unit 403 ruptured. Field personnel witnessed the pipe vibrating when the pumps were shutdown, resulting in the release and immediately notified the control room and notified a cenex pipeline qi. Since the segment was already shutdown, the controller further isolated the segment by closing the nearest upstream and downstream remotely operated valves. There was approximately 1 barrel of diesel released which was captured for disposal. Cenex pipeline notified the north dakota department of environmental quality of this event. The failed connection was sent to a third-party vendor for failure analysis. The root cause of this incident was identified as fatigue cracking of a threaded/back welded connection. Contributing factors included vibration and inadequate support. The relief line was replaced with adequately supported stainless tubing and the associated pump is being rebuilt and rebalanced. Additional corrective actions related to this incident are underway.
| Report Received Date | 2024-07-17 00:00:00 |
|---|---|
| Iyear | 2024 |
| Report Number | 20240169 |
| Supplemental Number | 40386 |
| Report Type | Supplemental Final |
| Operator Id | 2170 PHMSA Enforcement |
| Name | Cenex Pipeline Llc |
| Operator Street Address | 803 Hwy 212 S (Po Box 909) |
| Operator City Name | Laurel |
| Operator State Abbreviation | MT |
| Operator Postal Code | 59044 |
| Time Zone | Central |
| Daylight Savings Ind | Yes |
| Location Latitude | 48.22885 Google Maps OpenStreetMap |
| Location Longitude | -101.36906 Google Maps OpenStreetMap |
| Commodity Released Type | Refined And/or Petroleum Product (Non-Hvl) Which Is A Liquid At Ambient Conditions |
| Commodity Subtype | Diesel, Fuel Oil, Kerosene, Jet Fuel |
| Unintentional Release Bbls | 1 |
| Recovered Bbls | 1 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Local Operating Personnel, Including Contractors |
| Operator Type | Operator Employee |
| System Part Involved | Onshore Pump/meter Station Equipment And Piping |
| On Off Shore | Onshore |
| Status When Identified | Routine Shutdown |
| Communication State Fed Ind | Yes |
| Party Initiated Communication | Operator |
| Nrc Rpt Num | Nrc Notification Not Required NRC Report How to search |
| Ignite Ind | No |
| Notify Qualified Indiv Ind | Yes |
| Oil Spill Removal Org Ind | No |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Minot Pump Station |
| Segment Name | Minot To Fargo |
| Onshore State Abbreviation | Nd |
| Onshore Postal Code | 58701 |
| Onshore City Name | Not Within A Municipality |
| Onshore County Name | Ward |
| Designated Location | Survey Station No. |
| Designated Name | Minot Pump St |
| 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 | Interstate |
| Item Involved | Relief Line And Relief Equipment |
| Installation Year | Unknown |
| Manufactured Year | Unknown |
| Material Involved | Carbon Steel |
| Release Type | Other |
| Release Type Details | 1" Schedule 80 Piping Failed At A Back-Welded Threaded Connection |
| Wildlife Impact Ind | No |
| Soil Contamination | Yes |
| Long Term Assessment | No |
| Remediation Ind | No |
| Water Contam Ind | No |
| Could Be Hca | Yes |
| Commodity Reached Hca | No |
| Est Cost Oper Paid | 0 |
| Est Cost Gas Released | 140 |
| Est Cost Prop Damage | 3000 |
| Est Cost Emergency | 5000 |
| Est Cost Environmental | 1000 |
| Est Cost Other | 500 |
| Est Cost Other Details | Costs Of Preparing Phmsa Report. |
| Prpty | 9640 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 0 |
| Num Business Building Affctd | 0 |
| Accident Psig | 946 |
| Mop Psig | 1440 |
| Mop Cfr Section | Internal Design Pressure �195.406(A)(1) View CFR 49 §192 |
| Maop Established Date | 1990-01-01 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 | The controller did not receive alarms via scada or leak detection because the volume lost didn't meet any thresholds for alarm. The controller took appropriate corrective action by shutting down the pumps, allowing product to gravity feed away from the location and isolating the segment associated with the release. |
| 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 | Threaded Fitting |
| Additional Vibration Ind | Yes |
| Additional Support Ind | Yes |
| Preparer Name | M******* L** S***** |
| Preparer Title | Principal Dot Compliance |
| Preparer Email | M**************@c*****.com |
| Preparer Telephone | 4066285293 |
| Prepared Date | 2025-01-07 00:00:00 |
| Local Contact Name | C**** M******* |
| Local Contact Email | C*************@c*****.com |
| Local Contact Telephone | 406-628-5200 |
| Authorizer Name | G*** B**** |
| Authorizer Telephone | 4066285200 |
| Authorizer Title | Vp Pipelines And Terminals |
| Authorizer Email | G*********@c*****.comc |
| Narrative | On june 19, 2024 at approximately 11:34 a.M., field personnel were on-site monitoring a recently installed vibration sensor when a 1" diameter schedule 80 pipe used for thermal relief off the discharge side of mainline pump unit 403 ruptured. Field personnel witnessed the pipe vibrating when the pumps were shutdown, resulting in the release and immediately notified the control room and notified a cenex pipeline qi. Since the segment was already shutdown, the controller further isolated the segment by closing the nearest upstream and downstream remotely operated valves. There was approximately 1 barrel of diesel released which was captured for disposal. Cenex pipeline notified the north dakota department of environmental quality of this event. The failed connection was sent to a third-party vendor for failure analysis. The root cause of this incident was identified as fatigue cracking of a threaded/back welded connection. Contributing factors included vibration and inadequate support. The relief line was replaced with adequately supported stainless tubing and the associated pump is being rebuilt and rebalanced. Additional corrective actions related to this incident are underway. |
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