Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2019-07-19 — TX
Operator
Midcoast Gathering (North Texas) L.p.
Cause
Incorrect Operation
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$0
Incident datetime
2019-07-19 03:15
Report number
Location
TX
Narrative
The compression at the midcoast springtown plant shut down due to a power failure. The plant is approximately 350 yards from the springtown pipe yard where the relief valve on 2nd cag went off at set pressure (490 psig). Gas control received an alarm that the decatur compressor shut in and weatherford plant called gas control that they were losing inlet volume. Gas control called plant operator to go to springtown plant to check on compression at 3:00 am. At 3:15 am police called gas control that there was gas relieving at the springtown pipe yard. Midcoast employee arrived at the springtown plant and heard relief valve going off at 3:30 am (confirmation by the operator). Midcoast operations tech was called to investigate the relief valve and verified the relief valve on 2nd cag was relieving at 4:23 am. Operation tech open block valve to switch 2nd cag gas into sm-12 pipeline and the relief valve closed at 4:45 am. The relief valve had relieved at 490 psig at set pressure. Relief valve information: make: consolidated, model # 3910r-4-cc-v-65 size 6' x 8' x8' midcoast personnel (operations, gas control, it,) performed a in house investigation and has identified that we will install a low low alarm at the 4th cag to sm-12 pipeline to give an alarm at 30,000n mcf to inform gas control to call out personnel to the springtown plant (only manned daylight hours) to call someone out. This should prevent tise from occurring again. Prevention of recurrence to prevent this from happening again a committee reviewed the incident and determined the following will be implemented. Automate the bypass valve to open and common up the suction and discharge headers. Setting pressure to operate below relief valve setting. Install a check valve downstream of the psv to prevent any backflow in the event springtown's discharge line pressure is higher than springtown's suction line pressure. Change the meter run communication to allow gas control through scada to see no flow on the suction line to spring town. Afe has been approved, engineering has ordered parts and set up a work order. Gas control's incident review controller didn't recognize compressor units were down due to the communications outage. Reviewed the gas control and operations meeting minutes and scada changes made. Reviewed gas control's communication outage procedure. Reviewed corrective actions: gas control will notify on-call operator if communication outage occurs at springtown plant. Corrective actions 11/13/2019 gas control change the communication outage setpoint to 30 minutes from 60 minutes. Move the 4th cag outlet meter to a separate communications path so either inlet or outlet of compressor station can be seen if future communication outage occurs. Controller will notify field personal if communication outage occurs. Field installed a pressure control valve to shut gas in at a pressure set point. Installed a control valve to re-route gas to a different pipeline at a pressure set point.
Detailed record list
Report Received Date
2019-08-13 00:00:00
Iyear
2019
Report Number
20190094
Supplemental Number
32985
Report Type
Supplemental Final
Operator Id
31943
Name
Midcoast Gathering (North Texas) L.p.
Operator Street Address
2950 North Loop West Suite 1150
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77092
Local Datetime
2019-07-19 03:30:00
Location Latitude
32.98573
Location Longitude
-97.6849
Nrc Rpt Num
1252461
Nrc Rpt Datetime
2019-07-19 05:40:00
Commodity Released Type
Natural Gas
Unintentional Release
5135
Intentional Release
0
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2019-07-19 03:30:00
Restart Datetime
2019-07-19 04:45:00
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Incident Identified Datetime
2019-07-19 03:15:00
On Site Datetime
2019-07-19 04:23:00
On Off Shore
Onshore
Onshore State Abbreviation
Tx
Onshore Postal Code
76082
Onshore City Name
Springtown
Onshore County Name
Parker
Designated Location
Milepost
Designated Name
Springtown Ya
Pipe Fac Name
Springtown Pipe Yard
Segment Name
Cag 2nd
Federal
No
Location Type
Operator-Controlled Property
Incident Area Type
Aboveground
Incident Area Subtype
Typical Aboveground Facility Piping Or Appurtenance
Crossing
No
Pipe Facility Type
Intrastate
System Part Involved
Onshore Pipeline, Including Valve Sites
Item Involved
Valve
Valve Type
Relief Valve
Installation Year
2011
Material Involved
Carbon Steel
Release Type
Other
Release Type Details
Relief Valve
Class Location Type
Class 3 Location
Could Be Hca
No
Pir Radius
1
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
15706
Est Cost Intentional Release
0
Est Cost Prop Damage
0
Est Cost Emergency
405
Est Cost Other
0
Prpty
16111
Accident Psig
490
Mop Psig
500
Mop Cfr Section
192.619(A)(1)
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Upstream Valve Type Ind
Manual
Downstream Valve Type Ind
Manual
Length Segment Isolated
1500
Internal Inspection Ind
No
Other Inspection Ind
Yes
Internal Inspection Details
Gathering Line
Operation Complications Ind
Yes
Other Complications Ind
Yes
Inspect Comp Details
Gathering Line
Pipeline Function
Type A Gathering
Scada In Place Ind
No
Accident Identifier
Notification From Emergency Responder
Investigation Status
No, the facility was not monitored by a controller(s) at the time of the incident
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Incorrect Operation
Cause Details
Other Incorrect Operation
Operation Type
Other Incorrect Operation
Operation Details
Control Room Operator Failed To Notify Field Personnel Of Loss If Communications
Related Failure Follow Ind
Yes
Category Type
Non-Routine Operating Conditions (Abnormal Operations Or Emergencies)
Operator Qualification Ind
Yes
Qualified Individuals
Yes, They Were Qualified For The Task(S)
Preparer Name
B***** K****
Preparer Title
Gis Analyst
Preparer Email
B***********@m*************.com
Preparer Telephone
7138212072
Authorizer Name
M****** H****
Authorizer Title
Director Of Integrity
Authorizer Telephone
7138212063
Authorizer Email
M************@m*************.com
Narrative
The compression at the midcoast springtown plant shut down due to a power failure. The plant is approximately 350 yards from the springtown pipe yard where the relief valve on 2nd cag went off at set pressure (490 psig). Gas control received an alarm that the decatur compressor shut in and weatherford plant called gas control that they were losing inlet volume. Gas control called plant operator to go to springtown plant to check on compression at 3:00 am. At 3:15 am police called gas control that there was gas relieving at the springtown pipe yard. Midcoast employee arrived at the springtown plant and heard relief valve going off at 3:30 am (confirmation by the operator). Midcoast operations tech was called to investigate the relief valve and verified the relief valve on 2nd cag was relieving at 4:23 am. Operation tech open block valve to switch 2nd cag gas into sm-12 pipeline and the relief valve closed at 4:45 am. The relief valve had relieved at 490 psig at set pressure. Relief valve information: make: consolidated, model # 3910r-4-cc-v-65 size 6' x 8' x8' midcoast personnel (operations, gas control, it,) performed a in house investigation and has identified that we will install a low low alarm at the 4th cag to sm-12 pipeline to give an alarm at 30,000n mcf to inform gas control to call out personnel to the springtown plant (only manned daylight hours) to call someone out. This should prevent tise from occurring again. Prevention of recurrence to prevent this from happening again a committee reviewed the incident and determined the following will be implemented. Automate the bypass valve to open and common up the suction and discharge headers. Setting pressure to operate below relief valve setting. Install a check valve downstream of the psv to prevent any backflow in the event springtown's discharge line pressure is higher than springtown's suction line pressure. Change the meter run communication to allow gas control through scada to see no flow on the suction line to spring town. Afe has been approved, engineering has ordered parts and set up a work order. Gas control's incident review controller didn't recognize compressor units were down due to the communications outage. Reviewed the gas control and operations meeting minutes and scada changes made. Reviewed gas control's communication outage procedure. Reviewed corrective actions: gas control will notify on-call operator if communication outage occurs at springtown plant. Corrective actions 11/13/2019 gas control change the communication outage setpoint to 30 minutes from 60 minutes. Move the 4th cag outlet meter to a separate communications path so either inlet or outlet of compressor station can be seen if future communication outage occurs. Controller will notify field personal if communication outage occurs. Field installed a pressure control valve to shut gas in at a pressure set point. Installed a control valve to re-route gas to a different pipeline at a pressure set point.
| Report Received Date | 2019-08-13 00:00:00 |
|---|---|
| Iyear | 2019 |
| Report Number | 20190094 |
| Supplemental Number | 32985 |
| Report Type | Supplemental Final |
| Operator Id | 31943 PHMSA Enforcement |
| Name | Midcoast Gathering (North Texas) L.p. |
| Operator Street Address | 2950 North Loop West Suite 1150 |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77092 |
| Local Datetime | 2019-07-19 03:30:00 |
| Location Latitude | 32.98573 Google Maps OpenStreetMap |
| Location Longitude | -97.6849 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1252461 NRC Report How to search |
| Nrc Rpt Datetime | 2019-07-19 05:40:00 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 5135 |
| Intentional Release | 0 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2019-07-19 03:30:00 |
| Restart Datetime | 2019-07-19 04:45:00 |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2019-07-19 03:15:00 |
| On Site Datetime | 2019-07-19 04:23:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Tx |
| Onshore Postal Code | 76082 |
| Onshore City Name | Springtown |
| Onshore County Name | Parker |
| Designated Location | Milepost |
| Designated Name | Springtown Ya |
| Pipe Fac Name | Springtown Pipe Yard |
| Segment Name | Cag 2nd |
| Federal | No |
| Location Type | Operator-Controlled Property |
| Incident Area Type | Aboveground |
| Incident Area Subtype | Typical Aboveground Facility Piping Or Appurtenance |
| Crossing | No |
| Pipe Facility Type | Intrastate |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| Item Involved | Valve |
| Valve Type | Relief Valve |
| Installation Year | 2011 |
| Material Involved | Carbon Steel |
| Release Type | Other |
| Release Type Details | Relief Valve |
| Class Location Type | Class 3 Location |
| Could Be Hca | No |
| Pir Radius | 1 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 15706 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 0 |
| Est Cost Emergency | 405 |
| Est Cost Other | 0 |
| Prpty | 16111 |
| Accident Psig | 490 |
| Mop Psig | 500 |
| Mop Cfr Section | 192.619(A)(1) View CFR 49 §192 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | No |
| Upstream Valve Type Ind | Manual |
| Downstream Valve Type Ind | Manual |
| Length Segment Isolated | 1500 |
| Internal Inspection Ind | No |
| Other Inspection Ind | Yes |
| Internal Inspection Details | Gathering Line |
| Operation Complications Ind | Yes |
| Other Complications Ind | Yes |
| Inspect Comp Details | Gathering Line |
| Pipeline Function | Type A Gathering |
| Scada In Place Ind | No |
| Accident Identifier | Notification From Emergency Responder |
| Investigation Status | No, the facility was not monitored by a controller(s) at the time of the incident |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Incorrect Operation |
| Cause Details | Other Incorrect Operation |
| Operation Type | Other Incorrect Operation |
| Operation Details | Control Room Operator Failed To Notify Field Personnel Of Loss If Communications |
| Related Failure Follow Ind | Yes |
| Category Type | Non-Routine Operating Conditions (Abnormal Operations Or Emergencies) |
| Operator Qualification Ind | Yes |
| Qualified Individuals | Yes, They Were Qualified For The Task(S) |
| Preparer Name | B***** K**** |
| Preparer Title | Gis Analyst |
| Preparer Email | B***********@m*************.com |
| Preparer Telephone | 7138212072 |
| Authorizer Name | M****** H**** |
| Authorizer Title | Director Of Integrity |
| Authorizer Telephone | 7138212063 |
| Authorizer Email | M************@m*************.com |
| Narrative | The compression at the midcoast springtown plant shut down due to a power failure. The plant is approximately 350 yards from the springtown pipe yard where the relief valve on 2nd cag went off at set pressure (490 psig). Gas control received an alarm that the decatur compressor shut in and weatherford plant called gas control that they were losing inlet volume. Gas control called plant operator to go to springtown plant to check on compression at 3:00 am. At 3:15 am police called gas control that there was gas relieving at the springtown pipe yard. Midcoast employee arrived at the springtown plant and heard relief valve going off at 3:30 am (confirmation by the operator). Midcoast operations tech was called to investigate the relief valve and verified the relief valve on 2nd cag was relieving at 4:23 am. Operation tech open block valve to switch 2nd cag gas into sm-12 pipeline and the relief valve closed at 4:45 am. The relief valve had relieved at 490 psig at set pressure. Relief valve information: make: consolidated, model # 3910r-4-cc-v-65 size 6' x 8' x8' midcoast personnel (operations, gas control, it,) performed a in house investigation and has identified that we will install a low low alarm at the 4th cag to sm-12 pipeline to give an alarm at 30,000n mcf to inform gas control to call out personnel to the springtown plant (only manned daylight hours) to call someone out. This should prevent tise from occurring again. Prevention of recurrence to prevent this from happening again a committee reviewed the incident and determined the following will be implemented. Automate the bypass valve to open and common up the suction and discharge headers. Setting pressure to operate below relief valve setting. Install a check valve downstream of the psv to prevent any backflow in the event springtown's discharge line pressure is higher than springtown's suction line pressure. Change the meter run communication to allow gas control through scada to see no flow on the suction line to spring town. Afe has been approved, engineering has ordered parts and set up a work order. Gas control's incident review controller didn't recognize compressor units were down due to the communications outage. Reviewed the gas control and operations meeting minutes and scada changes made. Reviewed gas control's communication outage procedure. Reviewed corrective actions: gas control will notify on-call operator if communication outage occurs at springtown plant. Corrective actions 11/13/2019 gas control change the communication outage setpoint to 30 minutes from 60 minutes. Move the 4th cag outlet meter to a separate communications path so either inlet or outlet of compressor station can be seen if future communication outage occurs. Controller will notify field personal if communication outage occurs. Field installed a pressure control valve to shut gas in at a pressure set point. Installed a control valve to re-route gas to a different pipeline at a pressure set point. |
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