Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2018-12-10 — KY
Operator
Southern Star Central Gas Pipeline, Inc
Cause
Equipment Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$0
Incident datetime
2018-12-10 04:21
Report number
Location
KY
Narrative
On 12/10/2018 at 3:10 am local time, southern star central gas pipeline (sscgp) received a high level gas detection alarm which triggered an automatic emergency shutdown (esd) of the st. Francis compressor station in cheyenne county, kansas. Operations personnel were dispatched to the station arriving at 5:02 am. As part of the esd, the station is automatically isolated and blown down. The scada operator received alarms that sscgp line w was experiencing a rapid drop in pressure upstream of the station. The upstream station isolation valve failed to fully close during the esd causing mainline gas to escape also. All gas was released through the station blow-off valves. The personnel on site warmed the frozen isolation valve and had it fully closed by 5:40 am. A small fitting inside of the station was leaking which properly caused the original esd. This fitting was repaired and the station was brought back on-line at 3:30 pm on 12/10/2018.
Detailed record list
Report Received Date
2018-12-18 00:00:00
Iyear
2018
Report Number
20180131
Supplemental Number
31342
Report Type
Original Final
Operator Id
31711
Name
Southern Star Central Gas Pipeline, Inc
Operator Street Address
4700 Highway 56; Box 20010
Operator City Name
Owensboro
Operator State Abbreviation
KY
Operator Postal Code
42301
Local Datetime
2018-12-10 03:10:00
Location Latitude
39.926826
Location Longitude
-101.938796
Nrc Rpt Num
1232489
Nrc Rpt Datetime
2018-12-10 05:17:00
Commodity Released Type
Natural Gas
Unintentional Release
25100
Intentional Release
0
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2018-12-10 03:10:00
Restart Datetime
2018-12-10 15:30:00
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Incident Identified Datetime
2018-12-10 04:21:00
On Site Datetime
2018-12-10 05:02:00
On Off Shore
Onshore
Onshore State Abbreviation
Ks
Onshore Postal Code
67756
Onshore City Name
Not Within A Municipality
Onshore County Name
Cheyenne
Designated Location
Survey Station No.
Designated Name
160 / 4594+62
Pipe Fac Name
Line W
Segment Name
St Francis Compressor Station
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
Interstate
System Part Involved
Onshore Compressor Station Equipment And Piping
Item Involved
Valve
Valve Type
Auxiliary Or Other Valve
Installation Year
1980
Material Involved
Carbon Steel
Release Type
Other
Release Type Details
During Esd Of The St Francis Compressor Station, The Station Isolation Valve Literally Froze While Partially Open Allowing Mainline Gas To Vent During The Station Blow-Down.
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
128
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
100380
Est Cost Intentional Release
0
Est Cost Prop Damage
0
Est Cost Emergency
0
Est Cost Other
0
Prpty
100380
Accident Psig
621
Mop Psig
960
Mop Cfr Section
192.619(A)(2)
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Pipeline Function
Transmission System
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
Yes
Scada Conf Ind
Yes
Accident Identifier
Scada-Based Information (Such As Alarm(S), Alert(S), Event(S), And/or Volume Or Pack Calculations)
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 automatic esd was caused by gas detection at the station and the unintentional gas release from the frozen isolation valve, the controller was not at fault.
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
Esd System Failure Ind
Yes
Eq Additional Other Ind
Yes
Eq Additional Other Details
Frozen Isolation Valve
Preparer Name
J*** E*** G****
Preparer Title
Pipeline Compliance Engineer
Preparer Email
J*********@s****.com
Preparer Telephone
270-852-4414
Preparer Fax
270-852-5016
Authorizer Name
S**** P********
Authorizer Title
Vp And Chief Operations Officer
Authorizer Telephone
270-852-4670
Authorizer Email
S**************@s****.com
Narrative
On 12/10/2018 at 3:10 am local time, southern star central gas pipeline (sscgp) received a high level gas detection alarm which triggered an automatic emergency shutdown (esd) of the st. Francis compressor station in cheyenne county, kansas. Operations personnel were dispatched to the station arriving at 5:02 am. As part of the esd, the station is automatically isolated and blown down. The scada operator received alarms that sscgp line w was experiencing a rapid drop in pressure upstream of the station. The upstream station isolation valve failed to fully close during the esd causing mainline gas to escape also. All gas was released through the station blow-off valves. The personnel on site warmed the frozen isolation valve and had it fully closed by 5:40 am. A small fitting inside of the station was leaking which properly caused the original esd. This fitting was repaired and the station was brought back on-line at 3:30 pm on 12/10/2018.
| Report Received Date | 2018-12-18 00:00:00 |
|---|---|
| Iyear | 2018 |
| Report Number | 20180131 |
| Supplemental Number | 31342 |
| Report Type | Original Final |
| Operator Id | 31711 PHMSA Enforcement |
| Name | Southern Star Central Gas Pipeline, Inc |
| Operator Street Address | 4700 Highway 56; Box 20010 |
| Operator City Name | Owensboro |
| Operator State Abbreviation | KY |
| Operator Postal Code | 42301 |
| Local Datetime | 2018-12-10 03:10:00 |
| Location Latitude | 39.926826 Google Maps OpenStreetMap |
| Location Longitude | -101.938796 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1232489 NRC Report How to search |
| Nrc Rpt Datetime | 2018-12-10 05:17:00 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 25100 |
| Intentional Release | 0 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2018-12-10 03:10:00 |
| Restart Datetime | 2018-12-10 15:30:00 |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2018-12-10 04:21:00 |
| On Site Datetime | 2018-12-10 05:02:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Ks |
| Onshore Postal Code | 67756 |
| Onshore City Name | Not Within A Municipality |
| Onshore County Name | Cheyenne |
| Designated Location | Survey Station No. |
| Designated Name | 160 / 4594+62 |
| Pipe Fac Name | Line W |
| Segment Name | St Francis Compressor Station |
| 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 | Interstate |
| System Part Involved | Onshore Compressor Station Equipment And Piping |
| Item Involved | Valve |
| Valve Type | Auxiliary Or Other Valve |
| Installation Year | 1980 |
| Material Involved | Carbon Steel |
| Release Type | Other |
| Release Type Details | During Esd Of The St Francis Compressor Station, The Station Isolation Valve Literally Froze While Partially Open Allowing Mainline Gas To Vent During The Station Blow-Down. |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 128 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 100380 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 0 |
| Est Cost Emergency | 0 |
| Est Cost Other | 0 |
| Prpty | 100380 |
| Accident Psig | 621 |
| Mop Psig | 960 |
| Mop Cfr Section | 192.619(A)(2) View CFR 49 §192 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | No |
| Pipeline Function | Transmission System |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | Yes |
| Scada Conf Ind | Yes |
| Accident Identifier | Scada-Based Information (Such As Alarm(S), Alert(S), Event(S), And/or Volume Or Pack Calculations) |
| 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 automatic esd was caused by gas detection at the station and the unintentional gas release from the frozen isolation valve, the controller was not at fault. |
| 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 |
| Esd System Failure Ind | Yes |
| Eq Additional Other Ind | Yes |
| Eq Additional Other Details | Frozen Isolation Valve |
| Preparer Name | J*** E*** G**** |
| Preparer Title | Pipeline Compliance Engineer |
| Preparer Email | J*********@s****.com |
| Preparer Telephone | 270-852-4414 |
| Preparer Fax | 270-852-5016 |
| Authorizer Name | S**** P******** |
| Authorizer Title | Vp And Chief Operations Officer |
| Authorizer Telephone | 270-852-4670 |
| Authorizer Email | S**************@s****.com |
| Narrative | On 12/10/2018 at 3:10 am local time, southern star central gas pipeline (sscgp) received a high level gas detection alarm which triggered an automatic emergency shutdown (esd) of the st. Francis compressor station in cheyenne county, kansas. Operations personnel were dispatched to the station arriving at 5:02 am. As part of the esd, the station is automatically isolated and blown down. The scada operator received alarms that sscgp line w was experiencing a rapid drop in pressure upstream of the station. The upstream station isolation valve failed to fully close during the esd causing mainline gas to escape also. All gas was released through the station blow-off valves. The personnel on site warmed the frozen isolation valve and had it fully closed by 5:40 am. A small fitting inside of the station was leaking which properly caused the original esd. This fitting was repaired and the station was brought back on-line at 3:30 pm on 12/10/2018. |
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