Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2015-05-20 — TX
Operator
Dcp Midstream
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)
$2,000
Incident datetime
2015-05-20 18:31
Report number
Location
TX
Narrative
On may 20, 2015 at approximately 6:30 pm, dcp was delivering to a customer who had operational issues and backed up pressure to dcp's three rivers meter skid. The shutdown valve esd 100 went closed at its set point for opp of 1350 psig. An ngl technician responded on site at approximately 7:30 pm and diverted flow to an alternate customer. Another ngl technician was called to the site for assistance and arrived at approximately 9:00 pm. When the two technicians were ready to leave at 10:10 pm, they noticed the downstream side of a relief valve was iced over. The relief valve was discharging through the vent system which is connected to the plant (customer) flare. The relief valve was stuck in the open position, so the technician then isolated and closed psv 200. After reviewing data trends, it was determined the relief valve had opened and did not reseat. The estimated time frame that the relief valve was discharging is approximately 4 hours. The estimated volume that was released is approx. 770 bbls. The relief valve was replaced on may 22, 2015. The relief valve that malfunctioned is being sent to the vendor for a failure analysis. Vendor analysis on 6/17/2015 concluded that there was a piece of welding slag between the disc and nozzle seat. This would account for the valve failing to reseat. The source of the welding slag is unknown.
Detailed record list
Report Received Date
2015-06-17 00:00:00
Iyear
2015
Report Number
20150223
Supplemental Number
20552
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
2015-05-20 18:31:00
Location Latitude
28.40632
Location Longitude
-98.13716
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
770
Intentional Release Bbls
0
Recovered Bbls
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Cpm Leak Detection System Or Scada-Based Information (Such As Alarm(S), Alert(S), Event(S), And/or Volume Calculations)
Incident Identified Datetime
2015-05-20 18:31:00
System Part Involved
Onshore Pump/meter Station Equipment And Piping
On Off Shore
Onshore
Shutdown Due Accident Ind
No
Shutdown Explain
The Psv In Question Was Isolated And Replaced.
On Site Datetime
2015-05-20 19:30:00
Nrc Rpt Datetime
2015-05-20 22:45:00
Nrc Rpt Num
1117141
Ignite Ind
Yes
Explode Ind
No
Num Pub Evacuated
0
Pipe Fac Name
Three Rivers Meter Station
Segment Name
Sahi-1-4
Onshore State Abbreviation
Tx
Onshore Postal Code
78022
Onshore City Name
George West
Onshore County Name
Live Oak
Designated Location
Milepost/valve Station
Designated Name
Three Rivers
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
Relief Valve
Installation Year
2013
Material Involved
Carbon Steel
Release Type
Other
Release Type Details
Psv Failed To Reseat.
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
30000
Est Cost Prop Damage
2000
Est Cost Emergency
0
Est Cost Environmental
0
Est Cost Other
0
Prpty
32000
Accident Psig
1350
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
Yes
Scada Conf Ind
Yes
Cpm In Place Ind
Yes
Cpm Operating Ind
Yes
Cpm Functional Ind
Yes
Cpm Detection Ind
Yes
Cpm Conf Ind
Yes
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 scada system and controller acted correctly in the situation.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Equipment Failure
Cause Details
Malfunction Of Control/relief Equipment
Eq Failure Type
Malfunction Of Control/relief Equipment
Relief Valve Ind
Yes
Additional Defect Ind
Yes
Additional Installation Ind
Yes
Eq Additional Other Ind
Yes
Eq Additional Other Details
Piece Of Welding Slag Found In Between The Seats
Preparer Name
T**** S******
Preparer Title
Pipeline Compliance Specialist
Preparer Email
T*******@d***********.com
Preparer Telephone
713-268-7447
Prepared Date
2015-06-25 00:00:00
Authorizer Name
B****** P*****
Authorizer Telephone
713-268-7400
Authorizer Title
Director Liquid Pipeline Compliance
Authorizer Email
B*******@d***********.com
Narrative
On may 20, 2015 at approximately 6:30 pm, dcp was delivering to a customer who had operational issues and backed up pressure to dcp's three rivers meter skid. The shutdown valve esd 100 went closed at its set point for opp of 1350 psig. An ngl technician responded on site at approximately 7:30 pm and diverted flow to an alternate customer. Another ngl technician was called to the site for assistance and arrived at approximately 9:00 pm. When the two technicians were ready to leave at 10:10 pm, they noticed the downstream side of a relief valve was iced over. The relief valve was discharging through the vent system which is connected to the plant (customer) flare. The relief valve was stuck in the open position, so the technician then isolated and closed psv 200. After reviewing data trends, it was determined the relief valve had opened and did not reseat. The estimated time frame that the relief valve was discharging is approximately 4 hours. The estimated volume that was released is approx. 770 bbls. The relief valve was replaced on may 22, 2015. The relief valve that malfunctioned is being sent to the vendor for a failure analysis. Vendor analysis on 6/17/2015 concluded that there was a piece of welding slag between the disc and nozzle seat. This would account for the valve failing to reseat. The source of the welding slag is unknown.
| Report Received Date | 2015-06-17 00:00:00 |
|---|---|
| Iyear | 2015 |
| Report Number | 20150223 |
| Supplemental Number | 20552 |
| 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 | 2015-05-20 18:31:00 |
| Location Latitude | 28.40632 Google Maps OpenStreetMap |
| Location Longitude | -98.13716 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 | 770 |
| Intentional Release Bbls | 0 |
| Recovered Bbls | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Cpm Leak Detection System Or Scada-Based Information (Such As Alarm(S), Alert(S), Event(S), And/or Volume Calculations) |
| Incident Identified Datetime | 2015-05-20 18:31:00 |
| System Part Involved | Onshore Pump/meter Station Equipment And Piping |
| On Off Shore | Onshore |
| Shutdown Due Accident Ind | No |
| Shutdown Explain | The Psv In Question Was Isolated And Replaced. |
| On Site Datetime | 2015-05-20 19:30:00 |
| Nrc Rpt Datetime | 2015-05-20 22:45:00 |
| Nrc Rpt Num | 1117141 NRC Report How to search |
| Ignite Ind | Yes |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Three Rivers Meter Station |
| Segment Name | Sahi-1-4 |
| Onshore State Abbreviation | Tx |
| Onshore Postal Code | 78022 |
| Onshore City Name | George West |
| Onshore County Name | Live Oak |
| Designated Location | Milepost/valve Station |
| Designated Name | Three Rivers |
| 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 | Relief Valve |
| Installation Year | 2013 |
| Material Involved | Carbon Steel |
| Release Type | Other |
| Release Type Details | Psv Failed To Reseat. |
| 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 | 30000 |
| Est Cost Prop Damage | 2000 |
| Est Cost Emergency | 0 |
| Est Cost Environmental | 0 |
| Est Cost Other | 0 |
| Prpty | 32000 |
| Accident Psig | 1350 |
| 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 | Yes |
| Scada Conf Ind | Yes |
| Cpm In Place Ind | Yes |
| Cpm Operating Ind | Yes |
| Cpm Functional Ind | Yes |
| Cpm Detection Ind | Yes |
| Cpm Conf Ind | Yes |
| 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 scada system and controller acted correctly in the situation. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Equipment Failure |
| Cause Details | Malfunction Of Control/relief Equipment |
| Eq Failure Type | Malfunction Of Control/relief Equipment |
| Relief Valve Ind | Yes |
| Additional Defect Ind | Yes |
| Additional Installation Ind | Yes |
| Eq Additional Other Ind | Yes |
| Eq Additional Other Details | Piece Of Welding Slag Found In Between The Seats |
| Preparer Name | T**** S****** |
| Preparer Title | Pipeline Compliance Specialist |
| Preparer Email | T*******@d***********.com |
| Preparer Telephone | 713-268-7447 |
| Prepared Date | 2015-06-25 00:00:00 |
| Authorizer Name | B****** P***** |
| Authorizer Telephone | 713-268-7400 |
| Authorizer Title | Director Liquid Pipeline Compliance |
| Authorizer Email | B*******@d***********.com |
| Narrative | On may 20, 2015 at approximately 6:30 pm, dcp was delivering to a customer who had operational issues and backed up pressure to dcp's three rivers meter skid. The shutdown valve esd 100 went closed at its set point for opp of 1350 psig. An ngl technician responded on site at approximately 7:30 pm and diverted flow to an alternate customer. Another ngl technician was called to the site for assistance and arrived at approximately 9:00 pm. When the two technicians were ready to leave at 10:10 pm, they noticed the downstream side of a relief valve was iced over. The relief valve was discharging through the vent system which is connected to the plant (customer) flare. The relief valve was stuck in the open position, so the technician then isolated and closed psv 200. After reviewing data trends, it was determined the relief valve had opened and did not reseat. The estimated time frame that the relief valve was discharging is approximately 4 hours. The estimated volume that was released is approx. 770 bbls. The relief valve was replaced on may 22, 2015. The relief valve that malfunctioned is being sent to the vendor for a failure analysis. Vendor analysis on 6/17/2015 concluded that there was a piece of welding slag between the disc and nozzle seat. This would account for the valve failing to reseat. The source of the welding slag is unknown. |
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