Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2023-08-15 — OK
Operator
Oneok Ngl Pipeline, Llc
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)
$2,500
Incident datetime
2023-08-15 00:00 UTC
Report number
Location
OK
Narrative
On 7/17/2023 at 17:15, a third-party operator notified the oneok pipeline control room of a potential leak on the sterling 3 filter vessel 207 at oneok mont belvieu storage (ombs). The oneok pipeline controller dispatched local oneok operators. Ep was observed leaking from the vessel closure by the responding operators. The pipeline controller shut the pipeline down. The vessel was isolated and de-inventoried. The sealing element on the vessel appeared to be the cause of the leak and was replaced; the vessel was subsequently returned to service. Update: oneok submitted the failed sealing element as well as several samples from inventory to a third-party lab for analysis. The third-party analysis determined that the failure of the sealing element appears to be related to gas-liquid expansion resulting in internal tears and blisters. No signs of chemical degradation were identified within the seals provided. Oneok has verified that the failed sealing element was installed per manufacturer recommendations. Phmsa requests: 1. Please include specific material of seal if known/learned during lab analysis: the material was fkm rubber. 2. Please add to narrative explanation of systems at this facility - why scada and cpm did not detect the leak in this instance (or if they did but after it was detected & confirmed): there are differential pressure sensors located at the sterling 3 filter vessel. The leak was small, immediately identified by a third-party operator, and the vessel was isolated quickly. As a result, there was no indication of a leak on scada.
Detailed record list
Report Received Date
2023-08-15 00:00:00
Iyear
2023
Report Number
20230188
Supplemental Number
39000
Report Type
Supplemental Final
Operator Id
32109
Name
Oneok Ngl Pipeline, Llc
Operator Street Address
100 West Fifth Street
Operator City Name
Tulsa
Operator State Abbreviation
OK
Operator Postal Code
74103
Time Zone
Central
Daylight Savings Ind
Yes
Location Latitude
29.854728
Location Longitude
-94.892848
Commodity Released Type
Hvl Or Other Flammable Or Toxic Fluid Which Is A Gas At Ambient Conditions
Commodity Subtype
Lpg (Liquefied Petroleum Gas) / Ngl (Natural Gas Liquid)
Unintentional Release Bbls
7.62
Intentional Release Bbls
20.14
Recovered Bbls
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Notification From Public
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
Yes
Communication State Fed Ind
Yes
Party Initiated Communication
Operator
Nrc Rpt Num
Nrc Notification Not Required
Ignite Ind
No
Num Pub Evacuated
0
Pipe Fac Name
Oneok Mont Belvieu Storage - Sterling 3 Vessel 207
Segment Name
10547
Onshore State Abbreviation
Tx
Onshore Postal Code
77580
Onshore City Name
Mont Belvieu
Onshore County Name
Chambers
Designated Location
Survey Station No.
Designated Name
29182+67
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
Filter/strainer/separator
Installation Year
2014
Manufactured Year
2012
Material Involved
Material Other Than Carbon Steel
Material Details
Sealing Element - Fkm Rubber
Release Type
Leak
Leak Type
Seal Or Packing
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
Other Pop Ind
Yes
Other Pop Yes No
Yes
Usa Drinking Ind
Yes
Usa Drinking Yes No
Yes
Usa Ecological Ind
Yes
Usa Ecological Yes No
Yes
Est Cost Oper Paid
0
Est Cost Gas Released
451
Est Cost Prop Damage
2500
Est Cost Emergency
350
Est Cost Environmental
500
Est Cost Other
0
Prpty
3801
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
0
Num Business Building Affctd
0
Accident Psig
1051
Mop Psig
1440
Mop Cfr Section
Component Design Pressure �195.406(A)(2)
Maop Established Date
2014-01-14 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 accident was due to part/material failure with no other contributing factors.
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 Pump Seal) Or Packing
Eq Additional Other Ind
Yes
Eq Additional Other Details
See Narrative.
Preparer Name
B**** T*****
Preparer Title
Supervisor - Regulatory Compliance
Preparer Email
B***********@o****.com
Preparer Telephone
6208203047
Prepared Date
2023-12-20 00:00:00
Local Contact Name
B**** T*****
Local Contact Email
B***********@o****.com
Local Contact Telephone
6208203047
Authorizer Name
M****** G******
Authorizer Telephone
918-588-7382
Authorizer Title
Vp Natural Gas Liquids - Pipelines And Terminals
Authorizer Email
M**************@o****.com
Narrative
On 7/17/2023 at 17:15, a third-party operator notified the oneok pipeline control room of a potential leak on the sterling 3 filter vessel 207 at oneok mont belvieu storage (ombs). The oneok pipeline controller dispatched local oneok operators. Ep was observed leaking from the vessel closure by the responding operators. The pipeline controller shut the pipeline down. The vessel was isolated and de-inventoried. The sealing element on the vessel appeared to be the cause of the leak and was replaced; the vessel was subsequently returned to service. Update: oneok submitted the failed sealing element as well as several samples from inventory to a third-party lab for analysis. The third-party analysis determined that the failure of the sealing element appears to be related to gas-liquid expansion resulting in internal tears and blisters. No signs of chemical degradation were identified within the seals provided. Oneok has verified that the failed sealing element was installed per manufacturer recommendations. Phmsa requests: 1. Please include specific material of seal if known/learned during lab analysis: the material was fkm rubber. 2. Please add to narrative explanation of systems at this facility - why scada and cpm did not detect the leak in this instance (or if they did but after it was detected & confirmed): there are differential pressure sensors located at the sterling 3 filter vessel. The leak was small, immediately identified by a third-party operator, and the vessel was isolated quickly. As a result, there was no indication of a leak on scada.
| Report Received Date | 2023-08-15 00:00:00 |
|---|---|
| Iyear | 2023 |
| Report Number | 20230188 |
| Supplemental Number | 39000 |
| Report Type | Supplemental Final |
| Operator Id | 32109 PHMSA Enforcement |
| Name | Oneok Ngl Pipeline, Llc |
| Operator Street Address | 100 West Fifth Street |
| Operator City Name | Tulsa |
| Operator State Abbreviation | OK |
| Operator Postal Code | 74103 |
| Time Zone | Central |
| Daylight Savings Ind | Yes |
| Location Latitude | 29.854728 Google Maps OpenStreetMap |
| Location Longitude | -94.892848 Google Maps OpenStreetMap |
| Commodity Released Type | Hvl Or Other Flammable Or Toxic Fluid Which Is A Gas At Ambient Conditions |
| Commodity Subtype | Lpg (Liquefied Petroleum Gas) / Ngl (Natural Gas Liquid) |
| Unintentional Release Bbls | 7.62 |
| Intentional Release Bbls | 20.14 |
| Recovered Bbls | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Notification From Public |
| 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 | Yes |
| Communication State Fed Ind | Yes |
| Party Initiated Communication | Operator |
| Nrc Rpt Num | Nrc Notification Not Required NRC Report How to search |
| Ignite Ind | No |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Oneok Mont Belvieu Storage - Sterling 3 Vessel 207 |
| Segment Name | 10547 |
| Onshore State Abbreviation | Tx |
| Onshore Postal Code | 77580 |
| Onshore City Name | Mont Belvieu |
| Onshore County Name | Chambers |
| Designated Location | Survey Station No. |
| Designated Name | 29182+67 |
| 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 | Filter/strainer/separator |
| Installation Year | 2014 |
| Manufactured Year | 2012 |
| Material Involved | Material Other Than Carbon Steel |
| Material Details | Sealing Element - Fkm Rubber |
| Release Type | Leak |
| Leak Type | Seal Or Packing |
| 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 |
| Other Pop Ind | Yes |
| Other Pop Yes No | Yes |
| Usa Drinking Ind | Yes |
| Usa Drinking Yes No | Yes |
| Usa Ecological Ind | Yes |
| Usa Ecological Yes No | Yes |
| Est Cost Oper Paid | 0 |
| Est Cost Gas Released | 451 |
| Est Cost Prop Damage | 2500 |
| Est Cost Emergency | 350 |
| Est Cost Environmental | 500 |
| Est Cost Other | 0 |
| Prpty | 3801 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 0 |
| Num Business Building Affctd | 0 |
| Accident Psig | 1051 |
| Mop Psig | 1440 |
| Mop Cfr Section | Component Design Pressure �195.406(A)(2) View CFR 49 §192 |
| Maop Established Date | 2014-01-14 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 accident was due to part/material failure with no other contributing factors. |
| 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 Pump Seal) Or Packing |
| Eq Additional Other Ind | Yes |
| Eq Additional Other Details | See Narrative. |
| Preparer Name | B**** T***** |
| Preparer Title | Supervisor - Regulatory Compliance |
| Preparer Email | B***********@o****.com |
| Preparer Telephone | 6208203047 |
| Prepared Date | 2023-12-20 00:00:00 |
| Local Contact Name | B**** T***** |
| Local Contact Email | B***********@o****.com |
| Local Contact Telephone | 6208203047 |
| Authorizer Name | M****** G****** |
| Authorizer Telephone | 918-588-7382 |
| Authorizer Title | Vp Natural Gas Liquids - Pipelines And Terminals |
| Authorizer Email | M**************@o****.com |
| Narrative | On 7/17/2023 at 17:15, a third-party operator notified the oneok pipeline control room of a potential leak on the sterling 3 filter vessel 207 at oneok mont belvieu storage (ombs). The oneok pipeline controller dispatched local oneok operators. Ep was observed leaking from the vessel closure by the responding operators. The pipeline controller shut the pipeline down. The vessel was isolated and de-inventoried. The sealing element on the vessel appeared to be the cause of the leak and was replaced; the vessel was subsequently returned to service. Update: oneok submitted the failed sealing element as well as several samples from inventory to a third-party lab for analysis. The third-party analysis determined that the failure of the sealing element appears to be related to gas-liquid expansion resulting in internal tears and blisters. No signs of chemical degradation were identified within the seals provided. Oneok has verified that the failed sealing element was installed per manufacturer recommendations. Phmsa requests: 1. Please include specific material of seal if known/learned during lab analysis: the material was fkm rubber. 2. Please add to narrative explanation of systems at this facility - why scada and cpm did not detect the leak in this instance (or if they did but after it was detected & confirmed): there are differential pressure sensors located at the sterling 3 filter vessel. The leak was small, immediately identified by a third-party operator, and the vessel was isolated quickly. As a result, there was no indication of a leak on scada. |
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