Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2023-06-09 — 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)
$0
Incident datetime
2023-06-09 00:00 UTC
Report number
Location
TX
Narrative
On 5/14/2023, at approximately 17:10, targa ngl control room received 3 gas detector alarms at the navarro pump station (ps9). Controller immediately dispatched I&e technician to location to investigate. I&e technician arrived at approximately 18:45 and identified a release from the receiver pig trap closure. Upon arrival, and quick investigation of the situation, I&e technician determined the actuator stops were out of adjustment which caused the valve not to be fully seated in the closed position. As a result, when the o-ring failed, a small amount of product leaked past the failed o-ring. Actuator stops were adjusted and product flow stopped. Trap closure o-ring was replaced and trap returned to normal operating condition. Targa operations has identified issues with this actuator and has already begun installing ancillary equipment in preparation for new actuator from a new manufacture. Due to lead time, new actuator is estimated to be installed before the end of the year.
Detailed record list
Report Received Date
2023-06-09 00:00:00
Iyear
2023
Report Number
20230123
Supplemental Number
38310
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
Time Zone
Central
Daylight Savings Ind
Yes
Location Latitude
32.019316
Location Longitude
-96.783384
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
11
Intentional Release Bbls
0
Recovered Bbls
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Scada-Based Information (Such As Alarm(S), Alert(S), Event(S), And/or Volume Or Pack Calculations)
System Part Involved
Onshore Pipeline, Including Valve Sites
On Off Shore
Onshore
Status When Identified
Normal Operation, Includes Pauses Between Batches And During Maintenance
Shutdown Due Accident Ind
No
Shutdown Explain
Release Was Coming From Pig Trap Closure O-Ring.
Communication State Fed Ind
No
Nrc Rpt Num
Nrc Notification Not Required
Ignite Ind
No
Upstream Action Taken
Valve Closure
Upstream Valve Type Ind
Remotely Controlled
Downstream Action Taken
Operational Control
Downstream Oprtnl Cntrl Detail
Not Applicable To Situation Since Leak Occurred On The Trap O-Ring
Num Pub Evacuated
0
Pipe Fac Name
West Grand Prix Jct To Mont Belvieu
Segment Name
Gpx-E
Onshore State Abbreviation
Tx
Onshore Postal Code
76641
Onshore City Name
Not Within A Municipality
Onshore County Name
Navarro
Designated Location
Survey Station No.
Designated Name
Ps9
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
Scraper/pig Trap
Installation Year
2019
Manufactured Year
Unknown
Material Involved
Material Other Than Carbon Steel
Material Details
Buna
Release Type
Leak
Leak Type
Other
Leak Type Other
Leak At Buna O-Ring
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
412
Est Cost Prop Damage
0
Est Cost Emergency
0
Est Cost Environmental
0
Est Cost Other
1200
Est Cost Other Details
Approximate Cost Of New O-Ring
Prpty
1612
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
0
Num Business Building Affctd
0
Accident Psig
1109
Mop Psig
1440
Mop Cfr Section
Component Design Pressure �195.406(A)(2)
Maop Established Date
2020-01-09 00:00:00
Maop Reversal Flow Ind
No
Accident Pressure
Pressure Did Not Exceed Mop
Pressure Restriction Ind
No
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
Yes
Scada Conf Ind
Yes
Cpm In Place 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
Targa did not find that an investigation of the controllers actions or control room issues was necessary due to the fact the leak occurred on the trap o-ring.
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
Ief Addl Misalignment Ind
Yes
Eq Additional Other Ind
Yes
Eq Additional Other Details
Actuator Stops Out Of Alignment Not Allowing Valve To Close All The Way.
Preparer Name
B**** R******
Preparer Title
Pipeline Compliance Specialist
Preparer Email
B*******@t*************.com
Preparer Telephone
8179440617
Prepared Date
2023-07-24 00:00:00
Local Contact Name
B**** R******
Local Contact Email
B*******@t*************.com
Local Contact Telephone
8179440617
Authorizer Name
B**** R******
Authorizer Telephone
8179440617
Authorizer Title
Pipeline Compliance Specialist
Authorizer Email
B*******@t*************.com
Narrative
On 5/14/2023, at approximately 17:10, targa ngl control room received 3 gas detector alarms at the navarro pump station (ps9). Controller immediately dispatched I&e technician to location to investigate. I&e technician arrived at approximately 18:45 and identified a release from the receiver pig trap closure. Upon arrival, and quick investigation of the situation, I&e technician determined the actuator stops were out of adjustment which caused the valve not to be fully seated in the closed position. As a result, when the o-ring failed, a small amount of product leaked past the failed o-ring. Actuator stops were adjusted and product flow stopped. Trap closure o-ring was replaced and trap returned to normal operating condition. Targa operations has identified issues with this actuator and has already begun installing ancillary equipment in preparation for new actuator from a new manufacture. Due to lead time, new actuator is estimated to be installed before the end of the year.
| Report Received Date | 2023-06-09 00:00:00 |
|---|---|
| Iyear | 2023 |
| Report Number | 20230123 |
| Supplemental Number | 38310 |
| 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 |
| Time Zone | Central |
| Daylight Savings Ind | Yes |
| Location Latitude | 32.019316 Google Maps OpenStreetMap |
| Location Longitude | -96.783384 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 | 11 |
| Intentional Release Bbls | 0 |
| Recovered Bbls | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Scada-Based Information (Such As Alarm(S), Alert(S), Event(S), And/or Volume Or Pack Calculations) |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| On Off Shore | Onshore |
| Status When Identified | Normal Operation, Includes Pauses Between Batches And During Maintenance |
| Shutdown Due Accident Ind | No |
| Shutdown Explain | Release Was Coming From Pig Trap Closure O-Ring. |
| Communication State Fed Ind | No |
| Nrc Rpt Num | Nrc Notification Not Required NRC Report How to search |
| Ignite Ind | No |
| Upstream Action Taken | Valve Closure |
| Upstream Valve Type Ind | Remotely Controlled |
| Downstream Action Taken | Operational Control |
| Downstream Oprtnl Cntrl Detail | Not Applicable To Situation Since Leak Occurred On The Trap O-Ring |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | West Grand Prix Jct To Mont Belvieu |
| Segment Name | Gpx-E |
| Onshore State Abbreviation | Tx |
| Onshore Postal Code | 76641 |
| Onshore City Name | Not Within A Municipality |
| Onshore County Name | Navarro |
| Designated Location | Survey Station No. |
| Designated Name | Ps9 |
| 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 | Scraper/pig Trap |
| Installation Year | 2019 |
| Manufactured Year | Unknown |
| Material Involved | Material Other Than Carbon Steel |
| Material Details | Buna |
| Release Type | Leak |
| Leak Type | Other |
| Leak Type Other | Leak At Buna O-Ring |
| 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 | 412 |
| Est Cost Prop Damage | 0 |
| Est Cost Emergency | 0 |
| Est Cost Environmental | 0 |
| Est Cost Other | 1200 |
| Est Cost Other Details | Approximate Cost Of New O-Ring |
| Prpty | 1612 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 0 |
| Num Business Building Affctd | 0 |
| Accident Psig | 1109 |
| Mop Psig | 1440 |
| Mop Cfr Section | Component Design Pressure �195.406(A)(2) View CFR 49 §192 |
| Maop Established Date | 2020-01-09 00:00:00 |
| Maop Reversal Flow Ind | No |
| Accident Pressure | Pressure Did Not Exceed Mop |
| Pressure Restriction Ind | No |
| 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 | Yes |
| Scada Conf Ind | Yes |
| Cpm In Place 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 | Targa did not find that an investigation of the controllers actions or control room issues was necessary due to the fact the leak occurred on the trap o-ring. |
| 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 |
| Ief Addl Misalignment Ind | Yes |
| Eq Additional Other Ind | Yes |
| Eq Additional Other Details | Actuator Stops Out Of Alignment Not Allowing Valve To Close All The Way. |
| Preparer Name | B**** R****** |
| Preparer Title | Pipeline Compliance Specialist |
| Preparer Email | B*******@t*************.com |
| Preparer Telephone | 8179440617 |
| Prepared Date | 2023-07-24 00:00:00 |
| Local Contact Name | B**** R****** |
| Local Contact Email | B*******@t*************.com |
| Local Contact Telephone | 8179440617 |
| Authorizer Name | B**** R****** |
| Authorizer Telephone | 8179440617 |
| Authorizer Title | Pipeline Compliance Specialist |
| Authorizer Email | B*******@t*************.com |
| Narrative | On 5/14/2023, at approximately 17:10, targa ngl control room received 3 gas detector alarms at the navarro pump station (ps9). Controller immediately dispatched I&e technician to location to investigate. I&e technician arrived at approximately 18:45 and identified a release from the receiver pig trap closure. Upon arrival, and quick investigation of the situation, I&e technician determined the actuator stops were out of adjustment which caused the valve not to be fully seated in the closed position. As a result, when the o-ring failed, a small amount of product leaked past the failed o-ring. Actuator stops were adjusted and product flow stopped. Trap closure o-ring was replaced and trap returned to normal operating condition. Targa operations has identified issues with this actuator and has already begun installing ancillary equipment in preparation for new actuator from a new manufacture. Due to lead time, new actuator is estimated to be installed before the end of the year. |
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