Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2017-08-26 — TX
Operator
Dow Pipeline Co
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
2017-08-26 11:15
Report number
Location
TX
Narrative
The leak was discovered at approximately 11:15 a.M. When operations personnel were performing rounds at winfree pump station after hurricane harvey passed the area. Personnel noticed the flare appeared to have a small amount of waste gas flow, and they began investigating the cause. During inspection of the pump station, it was determined that the material going to the flare was from ethane pump p615a, which had been isolated prior to the hurricane due to a pump seal leak. Operations determined that the valve isolating the pump was leaking-by to the pump, and the pump seal was leaking to the capture-system that goes to the flare. Operations immediately isolated the segment, including the valve and the pump, then contacted the controller. The pipeline engineer reviewed flare flow trends and determined that flow to the capture system initiated at approximately 05:30 a.M. The total amount of emissions released from the flare were estimated to be 20.9 pounds of ethane, post combustion. Although the pump was isolated, the suction mov on p615a was passing which is why there was a flow to the flare starting at 5:30 a.M. The valve was pulled, but the inspection report has not yet been issued. Operations has not yet determined the cause of the valve leak, as the root cause investigation is on-going.
Detailed record list
Report Received Date
2017-09-25 00:00:00
Iyear
2017
Report Number
20170303
Supplemental Number
30933
Report Type
Supplemental Final
Operator Id
3527
Name
Dow Pipeline Co
Operator Street Address
1000 County Road 340
Operator City Name
Angleton
Operator State Abbreviation
TX
Operator Postal Code
77515
Local Datetime
2017-08-26 11:15:00
Location Latitude
29.84398
Location Longitude
-94.912469
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
Intentional Release Bbls
0.2
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
2017-08-26 11:15:00
System Part Involved
Onshore Pump/meter Station Equipment And Piping
On Off Shore
Onshore
Shutdown Due Accident Ind
No
Shutdown Explain
Leaking Valve Was Isolated, But Mainline Remains In Service
On Site Datetime
2017-08-26 11:15:00
Nrc Rpt Num
Nrc Notification Not Required
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Pipe Fac Name
Gcpl_msr_12in
Segment Name
Winfree Pump Station
Onshore State Abbreviation
Tx
Onshore Postal Code
77580
Onshore City Name
Mont Belvieu
Onshore County Name
Chambers
Designated Location
Survey Station No.
Designated Name
405049
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
Auxiliary Or Other Valve
Installation Year
2015
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
Yes
Commodity Reached Hca
Yes
Other Pop Ind
Yes
Other Pop Yes No
Yes
Est Cost Oper Paid
0
Est Cost Gas Released
418
Est Cost Prop Damage
0
Est Cost Emergency
0
Est Cost Environmental
0
Est Cost Other
0
Prpty
418
Accident Psig
900
Mop Psig
2160
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
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 leak was very small and undetectable to controller. Operations immediately isolated the leaking valve upon discovery.
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
Control Valve Ind
Yes
Eq Additional Other Ind
Yes
Eq Additional Other Details
Cause Of Valve Leak-By Unknown Until Completion Of Ongoing Investigation
Preparer Name
J******* A*******
Preparer Title
Regulatory Compliance Specialist
Preparer Email
J*********@d**.com
Preparer Telephone
979-238-0361
Preparer Fax
979-238-5685
Prepared Date
2018-09-13 00:00:00
Authorizer Name
J******* A*******
Authorizer Telephone
979-238-0361
Authorizer Title
Regulatory Complaince Specialist
Authorizer Email
J*********@d**.com
Narrative
The leak was discovered at approximately 11:15 a.M. When operations personnel were performing rounds at winfree pump station after hurricane harvey passed the area. Personnel noticed the flare appeared to have a small amount of waste gas flow, and they began investigating the cause. During inspection of the pump station, it was determined that the material going to the flare was from ethane pump p615a, which had been isolated prior to the hurricane due to a pump seal leak. Operations determined that the valve isolating the pump was leaking-by to the pump, and the pump seal was leaking to the capture-system that goes to the flare. Operations immediately isolated the segment, including the valve and the pump, then contacted the controller. The pipeline engineer reviewed flare flow trends and determined that flow to the capture system initiated at approximately 05:30 a.M. The total amount of emissions released from the flare were estimated to be 20.9 pounds of ethane, post combustion. Although the pump was isolated, the suction mov on p615a was passing which is why there was a flow to the flare starting at 5:30 a.M. The valve was pulled, but the inspection report has not yet been issued. Operations has not yet determined the cause of the valve leak, as the root cause investigation is on-going.
| Report Received Date | 2017-09-25 00:00:00 |
|---|---|
| Iyear | 2017 |
| Report Number | 20170303 |
| Supplemental Number | 30933 |
| Report Type | Supplemental Final |
| Operator Id | 3527 PHMSA Enforcement |
| Name | Dow Pipeline Co |
| Operator Street Address | 1000 County Road 340 |
| Operator City Name | Angleton |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77515 |
| Local Datetime | 2017-08-26 11:15:00 |
| Location Latitude | 29.84398 Google Maps OpenStreetMap |
| Location Longitude | -94.912469 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 |
| Intentional Release Bbls | 0.2 |
| 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 | 2017-08-26 11:15:00 |
| System Part Involved | Onshore Pump/meter Station Equipment And Piping |
| On Off Shore | Onshore |
| Shutdown Due Accident Ind | No |
| Shutdown Explain | Leaking Valve Was Isolated, But Mainline Remains In Service |
| On Site Datetime | 2017-08-26 11:15:00 |
| Nrc Rpt Num | Nrc Notification Not Required NRC Report How to search |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Gcpl_msr_12in |
| Segment Name | Winfree Pump Station |
| Onshore State Abbreviation | Tx |
| Onshore Postal Code | 77580 |
| Onshore City Name | Mont Belvieu |
| Onshore County Name | Chambers |
| Designated Location | Survey Station No. |
| Designated Name | 405049 |
| 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 | Auxiliary Or Other Valve |
| Installation Year | 2015 |
| 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 | Yes |
| Commodity Reached Hca | Yes |
| Other Pop Ind | Yes |
| Other Pop Yes No | Yes |
| Est Cost Oper Paid | 0 |
| Est Cost Gas Released | 418 |
| Est Cost Prop Damage | 0 |
| Est Cost Emergency | 0 |
| Est Cost Environmental | 0 |
| Est Cost Other | 0 |
| Prpty | 418 |
| Accident Psig | 900 |
| Mop Psig | 2160 |
| 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 | 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 leak was very small and undetectable to controller. Operations immediately isolated the leaking valve upon discovery. |
| 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 |
| Control Valve Ind | Yes |
| Eq Additional Other Ind | Yes |
| Eq Additional Other Details | Cause Of Valve Leak-By Unknown Until Completion Of Ongoing Investigation |
| Preparer Name | J******* A******* |
| Preparer Title | Regulatory Compliance Specialist |
| Preparer Email | J*********@d**.com |
| Preparer Telephone | 979-238-0361 |
| Preparer Fax | 979-238-5685 |
| Prepared Date | 2018-09-13 00:00:00 |
| Authorizer Name | J******* A******* |
| Authorizer Telephone | 979-238-0361 |
| Authorizer Title | Regulatory Complaince Specialist |
| Authorizer Email | J*********@d**.com |
| Narrative | The leak was discovered at approximately 11:15 a.M. When operations personnel were performing rounds at winfree pump station after hurricane harvey passed the area. Personnel noticed the flare appeared to have a small amount of waste gas flow, and they began investigating the cause. During inspection of the pump station, it was determined that the material going to the flare was from ethane pump p615a, which had been isolated prior to the hurricane due to a pump seal leak. Operations determined that the valve isolating the pump was leaking-by to the pump, and the pump seal was leaking to the capture-system that goes to the flare. Operations immediately isolated the segment, including the valve and the pump, then contacted the controller. The pipeline engineer reviewed flare flow trends and determined that flow to the capture system initiated at approximately 05:30 a.M. The total amount of emissions released from the flare were estimated to be 20.9 pounds of ethane, post combustion. Although the pump was isolated, the suction mov on p615a was passing which is why there was a flow to the flare starting at 5:30 a.M. The valve was pulled, but the inspection report has not yet been issued. Operations has not yet determined the cause of the valve leak, as the root cause investigation is on-going. |
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