Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2011-07-09 — TX
Operator
Anr Pipeline Co
Cause
Incorrect Operation
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$0
Incident datetime
2011-07-09 06:46
Report number
Location
TX
Narrative
Mainline relief valve opened and discharged twice (about 40 minutes and about 15 minutes) when engines shut down and bypass valves opened. Turns out relief set point was about 30 psi too low and the station discharge pressure was above this low set point. Engines went down because of an incorrect (also low) maximum discharge value in the new station control logic.
Detailed record list
Report Received Date
2011-08-03 00:00:00
Iyear
2011
Report Number
20110265
Supplemental Number
15935
Report Type
Supplemental Final
Operator Id
Name
Anr Pipeline Co
Operator Street Address
717 Texas Ave.
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77002
Local Datetime
2011-07-09 06:46:00
Location Latitude
41.6203177
Location Longitude
-88.5834939
Nrc Rpt Num
982145
Nrc Rpt Datetime
2011-07-09 09:14:00
Commodity Released Type
Natural Gas
Unintentional Release
13000
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Shutdown Due Accident Ind
No
Shutdown Explain
Facility Shut Down Caused The Incident.
Ignite Ind
No
Explode Ind
No
Incident Identified Datetime
2011-07-09 06:46:00
On Site Datetime
2011-07-09 06:46:00
On Off Shore
Onshore
Onshore State Abbreviation
Il
Onshore Postal Code
60541
Onshore City Name
Sandwich
Onshore County Name
Kendall
Designated Location
Milepost
Designated Name
Vs 52
Pipe Fac Name
Sandwich 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
Relief Valve
Material Involved
Carbon Steel
Release Type
Other
Release Type Details
Mainline Relief Valve Opened And Discharged Twice (About 40 Minutes And About 15 Minutes) When Engines Shut Down And Bypass Valves Opened. Turns Out Relief Set Point Was About 30 Psi Too Low And The Station Discharge Pressure Was Above This Low Set Point. Engines Went Down Because Of An Incorrect (Also Low) Maximum Discharge Value In The New Station Control Logic.
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
153
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
52000
Est Cost Intentional Release
0
Est Cost Prop Damage
0
Est Cost Emergency
500
Est Cost Other
0
Prpty
52500
Accident Psig
811
Mop Psig
975
Mop Cfr Section
Not On Omb-Approved Form When Submitted
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
No
Scada Conf Ind
No
Accident Identifier
Local Operating Personnel, Including Contractors
Operator Type
Operator Employee
Investigation Status
Yes, specify investigation result(s): (select all that apply)
Invest No Control Room Ind
Yes
Invest No Controller Ind
Yes
Invest Other Ind
Yes
Invest Other Ind Details
Post Incident Testing And A Review Of Scada Trend Data Revealed That This Was A Software And Controls Set Point Issue. The Esd Set Point Was Set Too Low. There Was An Incorrect Adjustment In Dec. 2010. Also, The Valve Set Point Could Have Migrated. One Possible Solution Is To Verfy Set Points More Frequently.
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
Job - Tools And Equipment - Inadequate Maintenance
Related Other Ind
Yes
Operation Related Details
Relief Set Point Was Incorrect. Also There Was An Incorrect Maximum Discharge Value In The Station Control Logic.
Category Type
Routine Maintenance
Operator Qualification Ind
Yes
Qualified Individuals
Yes, They Were Qualified For The Task(S)
Preparer Name
L**** S******
Preparer Title
Compliance Engineer
Preparer Email
L************@t**********.com
Preparer Telephone
832-320-5305
Preparer Fax
832-320-6305
Authorizer Name
L**** S******
Authorizer Telephone
832-320-5305
Authorizer Email
No Email Address
Narrative
Mainline relief valve opened and discharged twice (about 40 minutes and about 15 minutes) when engines shut down and bypass valves opened. Turns out relief set point was about 30 psi too low and the station discharge pressure was above this low set point. Engines went down because of an incorrect (also low) maximum discharge value in the new station control logic.
| Report Received Date | 2011-08-03 00:00:00 |
|---|---|
| Iyear | 2011 |
| Report Number | 20110265 |
| Supplemental Number | 15935 |
| Report Type | Supplemental Final |
| Operator Id | 405 PHMSA Enforcement |
| Name | Anr Pipeline Co |
| Operator Street Address | 717 Texas Ave. |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77002 |
| Local Datetime | 2011-07-09 06:46:00 |
| Location Latitude | 41.6203177 Google Maps OpenStreetMap |
| Location Longitude | -88.5834939 Google Maps OpenStreetMap |
| Nrc Rpt Num | 982145 NRC Report How to search |
| Nrc Rpt Datetime | 2011-07-09 09:14:00 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 13000 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Shutdown Due Accident Ind | No |
| Shutdown Explain | Facility Shut Down Caused The Incident. |
| Ignite Ind | No |
| Explode Ind | No |
| Incident Identified Datetime | 2011-07-09 06:46:00 |
| On Site Datetime | 2011-07-09 06:46:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Il |
| Onshore Postal Code | 60541 |
| Onshore City Name | Sandwich |
| Onshore County Name | Kendall |
| Designated Location | Milepost |
| Designated Name | Vs 52 |
| Pipe Fac Name | Sandwich 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 | Relief Valve |
| Material Involved | Carbon Steel |
| Release Type | Other |
| Release Type Details | Mainline Relief Valve Opened And Discharged Twice (About 40 Minutes And About 15 Minutes) When Engines Shut Down And Bypass Valves Opened. Turns Out Relief Set Point Was About 30 Psi Too Low And The Station Discharge Pressure Was Above This Low Set Point. Engines Went Down Because Of An Incorrect (Also Low) Maximum Discharge Value In The New Station Control Logic. |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 153 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 52000 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 0 |
| Est Cost Emergency | 500 |
| Est Cost Other | 0 |
| Prpty | 52500 |
| Accident Psig | 811 |
| Mop Psig | 975 |
| Mop Cfr Section | Not On Omb-Approved Form When Submitted 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 | No |
| Scada Conf Ind | No |
| Accident Identifier | Local Operating Personnel, Including Contractors |
| Operator Type | Operator Employee |
| Investigation Status | Yes, specify investigation result(s): (select all that apply) |
| Invest No Control Room Ind | Yes |
| Invest No Controller Ind | Yes |
| Invest Other Ind | Yes |
| Invest Other Ind Details | Post Incident Testing And A Review Of Scada Trend Data Revealed That This Was A Software And Controls Set Point Issue. The Esd Set Point Was Set Too Low. There Was An Incorrect Adjustment In Dec. 2010. Also, The Valve Set Point Could Have Migrated. One Possible Solution Is To Verfy Set Points More Frequently. |
| 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 | Job - Tools And Equipment - Inadequate Maintenance |
| Related Other Ind | Yes |
| Operation Related Details | Relief Set Point Was Incorrect. Also There Was An Incorrect Maximum Discharge Value In The Station Control Logic. |
| Category Type | Routine Maintenance |
| Operator Qualification Ind | Yes |
| Qualified Individuals | Yes, They Were Qualified For The Task(S) |
| Preparer Name | L**** S****** |
| Preparer Title | Compliance Engineer |
| Preparer Email | L************@t**********.com |
| Preparer Telephone | 832-320-5305 |
| Preparer Fax | 832-320-6305 |
| Authorizer Name | L**** S****** |
| Authorizer Telephone | 832-320-5305 |
| Authorizer Email | No Email Address |
| Narrative | Mainline relief valve opened and discharged twice (about 40 minutes and about 15 minutes) when engines shut down and bypass valves opened. Turns out relief set point was about 30 psi too low and the station discharge pressure was above this low set point. Engines went down because of an incorrect (also low) maximum discharge value in the new station control logic. |
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