Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2019-08-07 — OK
Operator
Oneok Ngl Pipeline, Llc
Cause
Incorrect Operation
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)
$100
Incident datetime
2019-08-07 06:00
Report number
Location
OK
Narrative
On 8/7/19, the 101 main filter vessel began leaking from the seal area. The operator noticed a vapor cloud around the vessel and pipeline control was called to shut down the pipeline. Once the release stopped, the vessel was manually blocked in and blown down. A contractor was called to the site to assist maintenance personnel with inspection of the gasket and to re-torque flange bolts. An estimated 3.5 bbls of propane were released to atmosphere. The vapor cloud did not leave the property boundaries. Update: 9/13/19 after completing the investigation of this incident, several changes have been implemented to help prevent this incident from occurring again. The current torque procedures have been updated to include a new flange bolt tightening sequence. This sequence has also been placed on signs at each individual filter vessel. New flange bolts have been installed on the vessel, and new gaskets have been ordered after determining shelf life of these gaskets are 2 to 3 years. Oneok personnel and the contractor used for this task have been retrained on the new flange bolt tightening procedure. Updated by: brent theede compliance specialist oneok, inc.
Detailed record list
Report Received Date
2019-08-26 00:00:00
Iyear
2019
Report Number
20190267
Supplemental Number
32700
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
Local Datetime
2019-08-07 05:58:00
Location Latitude
41.5653566
Location Longitude
-93.5258567
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
3.5
Intentional Release Bbls
0
Recovered Bbls
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Local Operating Personnel, Including Contractors
Operator Type
Operator Employee
Incident Identified Datetime
2019-08-07 06:00:00
System Part Involved
Onshore Equipment And Piping Associated With Belowground Storage
On Off Shore
Onshore
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2019-08-07 06:02:00
Restart Datetime
2019-08-07 14:25:00
On Site Datetime
2019-08-07 06:07:00
Nrc Rpt Num
Nrc Notification Not Required
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Pipe Fac Name
Oneok - Des Moines Storage Field
Segment Name
Bushton To Plattsmouth Ps To Des Moines (#11101)
Onshore State Abbreviation
Ia
Onshore Postal Code
50327
Onshore City Name
Pleasant Hill
Onshore County Name
Polk
Designated Location
Survey Station No.
Designated Name
825
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
Other
Item Involved Details
Filter Vessel Seal
Installation Year
Unknown
Material Involved
Material Other Than Carbon Steel
Material Details
Gasket
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
High Pop Ind
Yes
High Pop Yes No
Yes
Other Pop Ind
Yes
Other Pop Yes No
Yes
Est Cost Oper Paid
0
Est Cost Gas Released
52
Est Cost Prop Damage
100
Est Cost Emergency
0
Est Cost Environmental
0
Est Cost Other
0
Prpty
152
Accident Psig
845
Mop Psig
1260
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
No controller actions had taken place prior to the accident.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Incorrect Operation
Cause Details
Equipment Not Installed Properly
Operation Type
Equipment Not Installed Properly
Related Inadequate Proc Ind
Yes
Category Type
Routine Maintenance
Operator Qualification Ind
Yes
Qualified Individuals
No, But They Were Performing The Task(S) Under The Direction And Observation Of A Qualified Individual
Preparer Name
B**** T*****
Preparer Title
Regulatory Compliance Specialist
Preparer Email
B***********@o****.com
Preparer Telephone
6208203047
Prepared Date
2019-09-13 00:00:00
Authorizer Name
B**** T*****
Authorizer Telephone
6208203047
Authorizer Title
Regulatory Compliance Specialist
Authorizer Email
B***********@o****.com
Narrative
On 8/7/19, the 101 main filter vessel began leaking from the seal area. The operator noticed a vapor cloud around the vessel and pipeline control was called to shut down the pipeline. Once the release stopped, the vessel was manually blocked in and blown down. A contractor was called to the site to assist maintenance personnel with inspection of the gasket and to re-torque flange bolts. An estimated 3.5 bbls of propane were released to atmosphere. The vapor cloud did not leave the property boundaries. Update: 9/13/19 after completing the investigation of this incident, several changes have been implemented to help prevent this incident from occurring again. The current torque procedures have been updated to include a new flange bolt tightening sequence. This sequence has also been placed on signs at each individual filter vessel. New flange bolts have been installed on the vessel, and new gaskets have been ordered after determining shelf life of these gaskets are 2 to 3 years. Oneok personnel and the contractor used for this task have been retrained on the new flange bolt tightening procedure. Updated by: brent theede compliance specialist oneok, inc.
| Report Received Date | 2019-08-26 00:00:00 |
|---|---|
| Iyear | 2019 |
| Report Number | 20190267 |
| Supplemental Number | 32700 |
| 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 |
| Local Datetime | 2019-08-07 05:58:00 |
| Location Latitude | 41.5653566 Google Maps OpenStreetMap |
| Location Longitude | -93.5258567 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 | 3.5 |
| Intentional Release Bbls | 0 |
| Recovered Bbls | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Local Operating Personnel, Including Contractors |
| Operator Type | Operator Employee |
| Incident Identified Datetime | 2019-08-07 06:00:00 |
| System Part Involved | Onshore Equipment And Piping Associated With Belowground Storage |
| On Off Shore | Onshore |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2019-08-07 06:02:00 |
| Restart Datetime | 2019-08-07 14:25:00 |
| On Site Datetime | 2019-08-07 06:07:00 |
| Nrc Rpt Num | Nrc Notification Not Required NRC Report How to search |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Oneok - Des Moines Storage Field |
| Segment Name | Bushton To Plattsmouth Ps To Des Moines (#11101) |
| Onshore State Abbreviation | Ia |
| Onshore Postal Code | 50327 |
| Onshore City Name | Pleasant Hill |
| Onshore County Name | Polk |
| Designated Location | Survey Station No. |
| Designated Name | 825 |
| 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 | Other |
| Item Involved Details | Filter Vessel Seal |
| Installation Year | Unknown |
| Material Involved | Material Other Than Carbon Steel |
| Material Details | Gasket |
| 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 |
| High Pop Ind | Yes |
| High Pop Yes No | Yes |
| Other Pop Ind | Yes |
| Other Pop Yes No | Yes |
| Est Cost Oper Paid | 0 |
| Est Cost Gas Released | 52 |
| Est Cost Prop Damage | 100 |
| Est Cost Emergency | 0 |
| Est Cost Environmental | 0 |
| Est Cost Other | 0 |
| Prpty | 152 |
| Accident Psig | 845 |
| Mop Psig | 1260 |
| 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 | No controller actions had taken place prior to the accident. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Incorrect Operation |
| Cause Details | Equipment Not Installed Properly |
| Operation Type | Equipment Not Installed Properly |
| Related Inadequate Proc Ind | Yes |
| Category Type | Routine Maintenance |
| Operator Qualification Ind | Yes |
| Qualified Individuals | No, But They Were Performing The Task(S) Under The Direction And Observation Of A Qualified Individual |
| Preparer Name | B**** T***** |
| Preparer Title | Regulatory Compliance Specialist |
| Preparer Email | B***********@o****.com |
| Preparer Telephone | 6208203047 |
| Prepared Date | 2019-09-13 00:00:00 |
| Authorizer Name | B**** T***** |
| Authorizer Telephone | 6208203047 |
| Authorizer Title | Regulatory Compliance Specialist |
| Authorizer Email | B***********@o****.com |
| Narrative | On 8/7/19, the 101 main filter vessel began leaking from the seal area. The operator noticed a vapor cloud around the vessel and pipeline control was called to shut down the pipeline. Once the release stopped, the vessel was manually blocked in and blown down. A contractor was called to the site to assist maintenance personnel with inspection of the gasket and to re-torque flange bolts. An estimated 3.5 bbls of propane were released to atmosphere. The vapor cloud did not leave the property boundaries. Update: 9/13/19 after completing the investigation of this incident, several changes have been implemented to help prevent this incident from occurring again. The current torque procedures have been updated to include a new flange bolt tightening sequence. This sequence has also been placed on signs at each individual filter vessel. New flange bolts have been installed on the vessel, and new gaskets have been ordered after determining shelf life of these gaskets are 2 to 3 years. Oneok personnel and the contractor used for this task have been retrained on the new flange bolt tightening procedure. Updated by: brent theede compliance specialist oneok, inc. |
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