Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2020-08-21 — TX
Operator
Targa Downstream 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)
$48,472
Incident datetime
2020-08-21 14:01
Report number
Location
TX
Narrative
While completing the 6 month valve inspections on the mlv-17 site a targa employee noticed a tiny spot of ice on the side of a 4" balon ball valve that is/can be used to blowdown the pipeline. This valve is a two piece body type that bolts together with an o-ring forming a seal where to two parts come together. It is this o-ring that was seeping. The leak was barely detectable. Targa employees monitored the condition of the leak continually while making plans to perform the repair. Product was moved downstream out of the line segment using a pig pushed by nitrogen. Once product was removed and valves were closed the nitrogen was blown out of the pipeline and the valve was replaced and pipeline was put back in service.
Detailed record list
Report Received Date
2020-09-15 00:00:00
Iyear
2020
Report Number
20200254
Supplemental Number
34292
Report Type
Supplemental Final
Operator Id
39823
Name
Targa Downstream Llc
Operator Street Address
811 Louisiana St. Suite 2100
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77002
Local Datetime
2020-08-21 14:15:00
Location Latitude
33.740358
Location Longitude
-97.585948
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
0.47
Intentional Release Bbls
0.07
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
2020-08-21 14:01:00
System Part Involved
Onshore Pipeline, Including Valve Sites
On Off Shore
Onshore
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2020-08-22 06:20:00
Restart Datetime
2020-08-24 19:28:00
On Site Datetime
2020-08-21 14:01:00
Nrc Rpt Datetime
2020-08-21 16:17:00
Nrc Rpt Num
1285209
Ignite Ind
No
Explode Ind
No
Upstream Valve Type Ind
Remotely Controlled
Downstream Valve Type Ind
Remotely Controlled
Num Pub Evacuated
0
Pipe Fac Name
Grand Prix North
Segment Name
Grand Prix North
Onshore State Abbreviation
Tx
Onshore Postal Code
76265
Onshore City Name
Not Within A Municipality
Onshore County Name
Montague
Designated Location
Milepost/valve Station
Designated Name
Okmlv-17 Stat
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
Valve
Valve Type
Auxiliary Or Other Valve
Installation Year
2018
Material Involved
Carbon Steel
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
No
Commodity Reached Hca
No
Est Cost Oper Paid
0
Est Cost Gas Released
15
Est Cost Prop Damage
48472
Est Cost Emergency
4000
Est Cost Environmental
0
Est Cost Other
143000
Est Cost Other Details
Cost Of Nitrogen To Push Pig And Product Down The Pipeline Away From The Valve
Prpty
195487
Accident Psig
589
Mop Psig
1440
Accident Pressure
Pressure Did Not Exceed Mop
Pressure Restriction Ind
No
Length Segment Isolated
89954
Internal Inspection Ind
Yes
Operation Complications 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 o-ring leak was extremely small and undetectable without an instrument.
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
O-Ring
Additional Defect Ind
Yes
Preparer Name
R**** J H*******
Preparer Title
Sr Specialist Operational Discipline Group
Preparer Email
R********@t*************.com
Preparer Telephone
918-574-3834
Prepared Date
2020-09-22 00:00:00
Authorizer Name
R**** J H*******
Authorizer Telephone
918-574-3834
Authorizer Title
Sr Specialist Operational Discipline Group
Authorizer Email
R********@t*************.com
Narrative
While completing the 6 month valve inspections on the mlv-17 site a targa employee noticed a tiny spot of ice on the side of a 4" balon ball valve that is/can be used to blowdown the pipeline. This valve is a two piece body type that bolts together with an o-ring forming a seal where to two parts come together. It is this o-ring that was seeping. The leak was barely detectable. Targa employees monitored the condition of the leak continually while making plans to perform the repair. Product was moved downstream out of the line segment using a pig pushed by nitrogen. Once product was removed and valves were closed the nitrogen was blown out of the pipeline and the valve was replaced and pipeline was put back in service.
| Report Received Date | 2020-09-15 00:00:00 |
|---|---|
| Iyear | 2020 |
| Report Number | 20200254 |
| Supplemental Number | 34292 |
| Report Type | Supplemental Final |
| Operator Id | 39823 PHMSA Enforcement |
| Name | Targa Downstream Llc |
| Operator Street Address | 811 Louisiana St. Suite 2100 |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77002 |
| Local Datetime | 2020-08-21 14:15:00 |
| Location Latitude | 33.740358 Google Maps OpenStreetMap |
| Location Longitude | -97.585948 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 | 0.47 |
| Intentional Release Bbls | 0.07 |
| 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 | 2020-08-21 14:01:00 |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| On Off Shore | Onshore |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2020-08-22 06:20:00 |
| Restart Datetime | 2020-08-24 19:28:00 |
| On Site Datetime | 2020-08-21 14:01:00 |
| Nrc Rpt Datetime | 2020-08-21 16:17:00 |
| Nrc Rpt Num | 1285209 NRC Report How to search |
| Ignite Ind | No |
| Explode Ind | No |
| Upstream Valve Type Ind | Remotely Controlled |
| Downstream Valve Type Ind | Remotely Controlled |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Grand Prix North |
| Segment Name | Grand Prix North |
| Onshore State Abbreviation | Tx |
| Onshore Postal Code | 76265 |
| Onshore City Name | Not Within A Municipality |
| Onshore County Name | Montague |
| Designated Location | Milepost/valve Station |
| Designated Name | Okmlv-17 Stat |
| 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 | Valve |
| Valve Type | Auxiliary Or Other Valve |
| Installation Year | 2018 |
| Material Involved | Carbon Steel |
| 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 | No |
| Commodity Reached Hca | No |
| Est Cost Oper Paid | 0 |
| Est Cost Gas Released | 15 |
| Est Cost Prop Damage | 48472 |
| Est Cost Emergency | 4000 |
| Est Cost Environmental | 0 |
| Est Cost Other | 143000 |
| Est Cost Other Details | Cost Of Nitrogen To Push Pig And Product Down The Pipeline Away From The Valve |
| Prpty | 195487 |
| Accident Psig | 589 |
| Mop Psig | 1440 |
| Accident Pressure | Pressure Did Not Exceed Mop |
| Pressure Restriction Ind | No |
| Length Segment Isolated | 89954 |
| Internal Inspection Ind | Yes |
| Operation Complications 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 o-ring leak was extremely small and undetectable without an instrument. |
| 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 | O-Ring |
| Additional Defect Ind | Yes |
| Preparer Name | R**** J H******* |
| Preparer Title | Sr Specialist Operational Discipline Group |
| Preparer Email | R********@t*************.com |
| Preparer Telephone | 918-574-3834 |
| Prepared Date | 2020-09-22 00:00:00 |
| Authorizer Name | R**** J H******* |
| Authorizer Telephone | 918-574-3834 |
| Authorizer Title | Sr Specialist Operational Discipline Group |
| Authorizer Email | R********@t*************.com |
| Narrative | While completing the 6 month valve inspections on the mlv-17 site a targa employee noticed a tiny spot of ice on the side of a 4" balon ball valve that is/can be used to blowdown the pipeline. This valve is a two piece body type that bolts together with an o-ring forming a seal where to two parts come together. It is this o-ring that was seeping. The leak was barely detectable. Targa employees monitored the condition of the leak continually while making plans to perform the repair. Product was moved downstream out of the line segment using a pig pushed by nitrogen. Once product was removed and valves were closed the nitrogen was blown out of the pipeline and the valve was replaced and pipeline was put back in service. |
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