Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2023-07-26 — TX
Operator
Dcp Midstream, Lp
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)
$752,543
Incident datetime
2023-07-26 00:00 UTC
Report number
Location
TX
Narrative
6/27/23 @ 4:22 cst p66 houston control center receives gas detection alarm from la pryor pump station and field tech notified. 5:30 am field tech arrives on site at la pryor and confirms leak inside station and was shut down immediately. On 6/29/22 corrective measures by further isolation of the pipeline inside the station completed. Stopples were installed on both sides of the leaking check valve inside the station on the 20-inch line utilizing existing tees. The check valve replaced, and the pipeline purged and returned to service. Operations determined estimated cost of repairs to exceed $50,000 at approximately 9:30 am cst on 6/27/23 and initial nrc report number 1371374 made at 9:33 am cst. Supplemental / final report 9-25-23 submitted following completion of railroad commission and internal incident investigations on 9-11-23. Valve was inspected on 7/12/23 by third party/sunbelt valve services inc. To determine cause of leak. Internal o-ring failure was determined to be root cause. Check valve was installed when la pryor pump station was built 2017-2018. The o-ring appeared to have been crimped during initial installation of the check valve gear box assembly. Corrective action / mitigative measures: pms created for 20-inch tom wheatley check valves to be performed every 6 months. (la pryor pump station) job plan created to preform semi-annual preventive maintenance checks. Maximo work order 23-1822157 generated and completed 7/13/23 for la pryor pump station 20-inch tom wheatley check valve. Same pms and work orders created and completed for: brackettville, zella, pettus and willow pump stations.
Detailed record list
Report Received Date
2023-07-26 00:00:00
Iyear
2023
Report Number
20230170
Supplemental Number
38583
Report Type
Supplemental Final
Operator Id
31130
Name
Dcp Midstream, Lp
Operator Street Address
2331 Citywest Blvd. Hq-08-S812-02
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77042
Time Zone
Central
Daylight Savings Ind
No
Location Latitude
28.93084
Location Longitude
-99.88749
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
228
Intentional Release Bbls
117
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 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
No
Nrc Rpt Num
1371374
Additional Nrc Report Numbers
1371425, 1371602, 1371674
Ignite Ind
No
Num Pub Evacuated
0
Pipe Fac Name
La Pryor Pump Station
Segment Name
Sand Hills System
Onshore State Abbreviation
Tx
Onshore Postal Code
78872
Onshore City Name
Not Within A Municipality
Onshore County Name
Zavala
Designated Location
Survey Station No.
Designated Name
Pump Sta 29
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
Intrastate
Item Involved
Valve
Valve Type
Mainline
Valve Mainline Type
Check
Valve Manufacturer
Tom Wheatley
Installation Year
2017
Manufactured Year
2017
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
1360
Est Cost Prop Damage
752543
Est Cost Emergency
5000
Est Cost Environmental
0
Est Cost Other
10249
Est Cost Other Details
Security 3rd Party Tear Down And Inspection. Meals Provided On Location
Prpty
769152
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
0
Num Business Building Affctd
0
Accident Psig
353
Mop Psig
1440
Mop Cfr Section
Component Design Pressure �195.406(A)(2)
Maop Established Date
2013-03-29 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
Yes
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
Control room operator received a la pryor pump station gas detection alarm at 4:22 am on 6/27/23. The operator immediatealy notified the on call field tech to respond to the la pryor pump satation.
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 Installation Ind
Yes
Eqf Non Threaded Ind
Yes
Preparer Name
D***** H******
Preparer Title
Dot Specialist
Preparer Email
D*************@p**.com
Preparer Telephone
4325569473
Prepared Date
2023-09-25 00:00:00
Local Contact Name
E**** H********
Local Contact Email
E****************@p**.com
Local Contact Telephone
4326644627
Authorizer Name
M****** P******
Authorizer Telephone
9303970732
Authorizer Title
Pipeline Regulatory Supervisor
Authorizer Email
M*************@p**.com
Narrative
6*******@ 4:22 cst p66 houston control center receives gas detection alarm from la pryor pump station and field tech notified. 5:30 am field tech arrives on site at la pryor and confirms leak inside station and was shut down immediately. On 6/29/22 corrective measures by further isolation of the pipeline inside the station completed. Stopples were installed on both sides of the leaking check valve inside the station on the 20-inch line utilizing existing tees. The check valve replaced, and the pipeline purged and returned to service. Operations determined estimated cost of repairs to exceed $50,000 at approximately 9:30 am cst on 6/27/23 and initial nrc report number 1371374 made at 9:33 am cst. Supplemental / final report 9-25-23 submitted following completion of railroad commission and internal incident investigations on 9-11-23. Valve was inspected on 7/12/23 by third party/sunbelt valve services inc. To determine cause of leak. Internal o-ring failure was determined to be root cause. Check valve was installed when la pryor pump station was built 2017-2018. The o-ring appeared to have been crimped during initial installation of the check valve gear box assembly. Corrective action / mitigative measures: pms created for 20-inch tom wheatley check valves to be performed every 6 months. (la pryor pump station) job plan created to preform semi-annual preventive maintenance checks. Maximo work order 23-1822157 generated and completed 7/13/23 for la pryor pump station 20-inch tom wheatley check valve. *********************************************************************************************************.
| Report Received Date | 2023-07-26 00:00:00 |
|---|---|
| Iyear | 2023 |
| Report Number | 20230170 |
| Supplemental Number | 38583 |
| Report Type | Supplemental Final |
| Operator Id | 31130 PHMSA Enforcement |
| Name | Dcp Midstream, Lp |
| Operator Street Address | 2331 Citywest Blvd. Hq-08-S812-02 |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77042 |
| Time Zone | Central |
| Daylight Savings Ind | No |
| Location Latitude | 28.93084 Google Maps OpenStreetMap |
| Location Longitude | -99.88749 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 | 228 |
| Intentional Release Bbls | 117 |
| 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 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 | No |
| Nrc Rpt Num | 1371374 NRC Report How to search |
| Additional Nrc Report Numbers | 1371425, 1371602, 1371674 |
| Ignite Ind | No |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | La Pryor Pump Station |
| Segment Name | Sand Hills System |
| Onshore State Abbreviation | Tx |
| Onshore Postal Code | 78872 |
| Onshore City Name | Not Within A Municipality |
| Onshore County Name | Zavala |
| Designated Location | Survey Station No. |
| Designated Name | Pump Sta 29 |
| 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 | Intrastate |
| Item Involved | Valve |
| Valve Type | Mainline |
| Valve Mainline Type | Check |
| Valve Manufacturer | Tom Wheatley |
| Installation Year | 2017 |
| Manufactured Year | 2017 |
| 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 | 1360 |
| Est Cost Prop Damage | 752543 |
| Est Cost Emergency | 5000 |
| Est Cost Environmental | 0 |
| Est Cost Other | 10249 |
| Est Cost Other Details | Security 3rd Party Tear Down And Inspection. Meals Provided On Location |
| Prpty | 769152 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 0 |
| Num Business Building Affctd | 0 |
| Accident Psig | 353 |
| Mop Psig | 1440 |
| Mop Cfr Section | Component Design Pressure �195.406(A)(2) View CFR 49 §192 |
| Maop Established Date | 2013-03-29 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 | Yes |
| 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 | Control room operator received a la pryor pump station gas detection alarm at 4:22 am on 6/27/23. The operator immediatealy notified the on call field tech to respond to the la pryor pump satation. |
| 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 Installation Ind | Yes |
| Eqf Non Threaded Ind | Yes |
| Preparer Name | D***** H****** |
| Preparer Title | Dot Specialist |
| Preparer Email | D*************@p**.com |
| Preparer Telephone | 4325569473 |
| Prepared Date | 2023-09-25 00:00:00 |
| Local Contact Name | E**** H******** |
| Local Contact Email | E****************@p**.com |
| Local Contact Telephone | 4326644627 |
| Authorizer Name | M****** P****** |
| Authorizer Telephone | 9303970732 |
| Authorizer Title | Pipeline Regulatory Supervisor |
| Authorizer Email | M*************@p**.com |
| Narrative | 6*******@ 4:22 cst p66 houston control center receives gas detection alarm from la pryor pump station and field tech notified. 5:30 am field tech arrives on site at la pryor and confirms leak inside station and was shut down immediately. On 6/29/22 corrective measures by further isolation of the pipeline inside the station completed. Stopples were installed on both sides of the leaking check valve inside the station on the 20-inch line utilizing existing tees. The check valve replaced, and the pipeline purged and returned to service. Operations determined estimated cost of repairs to exceed $50,000 at approximately 9:30 am cst on 6/27/23 and initial nrc report number 1371374 made at 9:33 am cst. Supplemental / final report 9-25-23 submitted following completion of railroad commission and internal incident investigations on 9-11-23. Valve was inspected on 7/12/23 by third party/sunbelt valve services inc. To determine cause of leak. Internal o-ring failure was determined to be root cause. Check valve was installed when la pryor pump station was built 2017-2018. The o-ring appeared to have been crimped during initial installation of the check valve gear box assembly. Corrective action / mitigative measures: pms created for 20-inch tom wheatley check valves to be performed every 6 months. (la pryor pump station) job plan created to preform semi-annual preventive maintenance checks. Maximo work order 23-1822157 generated and completed 7/13/23 for la pryor pump station 20-inch tom wheatley check valve. *********************************************************************************************************. |
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