Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2017-05-21 — TX
Operator
Dcp Midstream
Cause
Material Failure Of Pipe Or Weld
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)
$2,000
Incident datetime
2017-05-21 21:15
Report number
Location
TX
Narrative
After power outage at three rivers pump station, operator had restarted product pumps and noticed a pinhole leak on the balance tube of pump #2, when making equipment rounds after restart. The pinhole leak was on the opposite end of the balance tube as the leak that occured on 11-29-16 on the same balance tube/pump. Ngl was leaking out of the pinhole leak in the weld area where the balance tube is welded to the body of the pump, and immediately vaporizing to atmosphere due to the extremely small leak rate. Operations manned the pump around the clock while a repair plan was being developed. The pump was shutdown, isolated, and pressure relieved with no change in leak rate of the pinhole. Analysis of the pinhole leak dimensions are being conducted. Initial nrc telphonic report was for 5 gallons of product. Engineering estimations at this time show 20 gallons of product being released to atmosphere for the entire event. Pumps of similar design have since been redesigned to allow better welding practices of the balance tube to the pump body. Update and final 8-4-17: upon further investigation of the equipment, information in this original report have been confirmed to be accurate and final concerning failure analysis, corrective action, and release estimates.
Detailed record list
Report Received Date
2017-06-19 00:00:00
Iyear
2017
Report Number
20170198
Supplemental Number
22522
Report Type
Supplemental Final
Operator Id
31130
Name
Dcp Midstream
Operator Street Address
2331 Citywest Blvd. Hq-08-S812-02
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77042
Local Datetime
2017-05-21 21:15:00
Location Latitude
28.558649
Location Longitude
-98.163536
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
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
2017-05-21 21:15:00
System Part Involved
Onshore Pump/meter Station Equipment And Piping
On Off Shore
Onshore
Shutdown Due Accident Ind
No
Shutdown Explain
Extremely Small Leak Was Monitored 24/7 While Maintenance Plan Developed
On Site Datetime
2017-05-21 21:15:00
Nrc Rpt Datetime
2017-05-24 13:20:00
Nrc Rpt Num
1179216
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Pipe Fac Name
Three Rivers Pump Station
Segment Name
Sandhills Pipeline
Onshore State Abbreviation
Tx
Onshore Postal Code
78071
Onshore City Name
Three Rivers
Onshore County Name
Live Oak
Designated Location
Milepost/valve Station
Designated Name
Pump Station
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
Weld, Including Heat-Affected Zone
Weld Subtype
Other Butt Weld
Installation Year
2016
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Pinhole
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
25
Est Cost Prop Damage
2000
Est Cost Emergency
0
Est Cost Environmental
0
Est Cost Other
0
Prpty
2025
Accident Psig
750
Mop Psig
1440
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
Pinhole leak was so small, it was unrecognizable by the control room
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Material Failure Of Pipe Or Weld
Cause Details
Original Manufacturing-Related (Not Girth Weld Or Other Welds Formed In The Field)
Field Exam Ind
Yes
Failure Type
Original Manufacturing-Related (Not Girth Weld Or Other Welds Formed In The Field)
Other Factor
Yes
Other Factor Details
Manufacturers Defect
Additional Lack Fusion Ind
Yes
Collected Data Ind
No
Has Hydrtst Conduc Before Ind
No
Direct Asmnt Conducted
No
Non Destructive Exam Ind
No
Preparer Name
B*** C* A******
Preparer Title
Sr. Pipeline Compliance And Integrity Specialist
Preparer Email
A******@d***********.com
Preparer Telephone
7132688770
Prepared Date
2017-08-04 00:00:00
Authorizer Name
B****** P*****
Authorizer Telephone
7132687400
Authorizer Title
Director Pipeline Compliance And Integrity
Authorizer Email
B*******@d***********.com
Narrative
After power outage at three rivers pump station, operator had restarted product pumps and noticed a pinhole leak on the balance tube of pump #2, when making equipment rounds after restart. The pinhole leak was on the opposite end of the balance tube as the leak that occured on 11-29-16 on the same balance tube/pump. Ngl was leaking out of the pinhole leak in the weld area where the balance tube is welded to the body of the pump, and immediately vaporizing to atmosphere due to the extremely small leak rate. Operations manned the pump around the clock while a repair plan was being developed. The pump was shutdown, isolated, and pressure relieved with no change in leak rate of the pinhole. Analysis of the pinhole leak dimensions are being conducted. Initial nrc telphonic report was for 5 gallons of product. Engineering estimations at this time show 20 gallons of product being released to atmosphere for the entire event. Pumps of similar design have since been redesigned to allow better welding practices of the balance tube to the pump body. Update and final 8-4-17: upon further investigation of the equipment, information in this original report have been confirmed to be accurate and final concerning failure analysis, corrective action, and release estimates.
| Report Received Date | 2017-06-19 00:00:00 |
|---|---|
| Iyear | 2017 |
| Report Number | 20170198 |
| Supplemental Number | 22522 |
| Report Type | Supplemental Final |
| Operator Id | 31130 PHMSA Enforcement |
| Name | Dcp Midstream |
| Operator Street Address | 2331 Citywest Blvd. Hq-08-S812-02 |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77042 |
| Local Datetime | 2017-05-21 21:15:00 |
| Location Latitude | 28.558649 Google Maps OpenStreetMap |
| Location Longitude | -98.163536 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 |
| 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 | 2017-05-21 21:15:00 |
| System Part Involved | Onshore Pump/meter Station Equipment And Piping |
| On Off Shore | Onshore |
| Shutdown Due Accident Ind | No |
| Shutdown Explain | Extremely Small Leak Was Monitored 24/7 While Maintenance Plan Developed |
| On Site Datetime | 2017-05-21 21:15:00 |
| Nrc Rpt Datetime | 2017-05-24 13:20:00 |
| Nrc Rpt Num | 1179216 NRC Report How to search |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Three Rivers Pump Station |
| Segment Name | Sandhills Pipeline |
| Onshore State Abbreviation | Tx |
| Onshore Postal Code | 78071 |
| Onshore City Name | Three Rivers |
| Onshore County Name | Live Oak |
| Designated Location | Milepost/valve Station |
| Designated Name | Pump Station |
| 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 | Weld, Including Heat-Affected Zone |
| Weld Subtype | Other Butt Weld |
| Installation Year | 2016 |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Pinhole |
| 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 | 25 |
| Est Cost Prop Damage | 2000 |
| Est Cost Emergency | 0 |
| Est Cost Environmental | 0 |
| Est Cost Other | 0 |
| Prpty | 2025 |
| Accident Psig | 750 |
| Mop Psig | 1440 |
| 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 | Pinhole leak was so small, it was unrecognizable by the control room |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Material Failure Of Pipe Or Weld |
| Cause Details | Original Manufacturing-Related (Not Girth Weld Or Other Welds Formed In The Field) |
| Field Exam Ind | Yes |
| Failure Type | Original Manufacturing-Related (Not Girth Weld Or Other Welds Formed In The Field) |
| Other Factor | Yes |
| Other Factor Details | Manufacturers Defect |
| Additional Lack Fusion Ind | Yes |
| Collected Data Ind | No |
| Has Hydrtst Conduc Before Ind | No |
| Direct Asmnt Conducted | No |
| Non Destructive Exam Ind | No |
| Preparer Name | B*** C* A****** |
| Preparer Title | Sr. Pipeline Compliance And Integrity Specialist |
| Preparer Email | A******@d***********.com |
| Preparer Telephone | 7132688770 |
| Prepared Date | 2017-08-04 00:00:00 |
| Authorizer Name | B****** P***** |
| Authorizer Telephone | 7132687400 |
| Authorizer Title | Director Pipeline Compliance And Integrity |
| Authorizer Email | B*******@d***********.com |
| Narrative | After power outage at three rivers pump station, operator had restarted product pumps and noticed a pinhole leak on the balance tube of pump #2, when making equipment rounds after restart. The pinhole leak was on the opposite end of the balance tube as the leak that occured on 11-29-16 on the same balance tube/pump. Ngl was leaking out of the pinhole leak in the weld area where the balance tube is welded to the body of the pump, and immediately vaporizing to atmosphere due to the extremely small leak rate. Operations manned the pump around the clock while a repair plan was being developed. The pump was shutdown, isolated, and pressure relieved with no change in leak rate of the pinhole. Analysis of the pinhole leak dimensions are being conducted. Initial nrc telphonic report was for 5 gallons of product. Engineering estimations at this time show 20 gallons of product being released to atmosphere for the entire event. Pumps of similar design have since been redesigned to allow better welding practices of the balance tube to the pump body. Update and final 8-4-17: upon further investigation of the equipment, information in this original report have been confirmed to be accurate and final concerning failure analysis, corrective action, and release estimates. |
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