Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2011-05-11 — 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
2011-05-11 16:15
Report number
Location
TX
Narrative
The hamilton station, operating at 809 psi, tripped on main line over pressure due to a high pressure condition in the trip circuitry piping. It is believed that high temperatures in the building caused the pressure to increase above the 876 psi set point. When the station pressure equalized, the station block gate (bypass valve) opened which allowed gas to flow through the open vents on the 30 inch pig launcher. The pig launcher had been left in an abnormal line-up, with the ili pig in the depressurized trap, for an early morning launch.
Detailed record list
Report Received Date
2011-06-08 00:00:00
Iyear
2011
Report Number
20110170
Supplemental Number
15932
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
2011-05-11 16:15:00
Location Latitude
42.66713
Location Longitude
-85.95636
Nrc Rpt Num
975983
Nrc Rpt Datetime
2011-05-11 17:55:00
Commodity Released Type
Natural Gas
Unintentional Release
4500
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Shutdown Due Accident Ind
No
Shutdown Explain
Following The Investigation Of The Gas Release, The Station Was Returned To Serv
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
On Off Shore
Onshore
Onshore State Abbreviation
Mi
Onshore Postal Code
49419
Onshore City Name
Hamilton
Onshore County Name
Allegan
Pipe Fac Name
Hamilton Compressor Station
Federal
No
Location Type
Operator-Controlled Property
Incident Area Type
Aboveground
Incident Area Subtype
Other
Incident Area Details
Compressor Station
Crossing
No
Pipe Facility Type
Interstate
System Part Involved
Onshore Compressor Station Equipment And Piping
Item Involved
Other
Item Involved Details
Station Block Gate (Bypass Valve)
Material Involved
Carbon Steel
Release Type
Other
Release Type Details
When The Station Pressure Equalized, The Station Block Gate (Bypass Valve) Opened Which Allowed Gas To Flow Through The Open Vents On The 30 Inch Pig Launcher. The Pig Launcher Had Been Left In An Abnormal Line-Up, With The Ili Pig In The Depressurized Trap, For An Early Morning Launch.
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
369
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
20250
Est Cost Intentional Release
0
Est Cost Prop Damage
0
Est Cost Emergency
40000
Est Cost Other
0
Est Cost Other Details
0
Prpty
60250
Accident Psig
876
Mop Psig
850
Mop Cfr Section
Not On Omb-Approved Form When Submitted
Accident Pressure
Pressure Exceeded Maop, But Did Not Exceed The Applicable Allowance In 192.201
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
Local Operating Personnel, Including Contractors
Operator Type
Operator Employee
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 local operations personnel had been performing maintenance work and therefore were responsible for operating the equipment that may not have been utilized properly.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Incorrect Operation
Cause Details
Pipeline Or Equipment Overpressured
Operation Type
Pipeline Or Equipment Overpressured
Related Inadequate Proc Ind
Yes
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
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
The hamilton station, operating at 809 psi, tripped on main line over pressure due to a high pressure condition in the trip circuitry piping. It is believed that high temperatures in the building caused the pressure to increase above the 876 psi set point. When the station pressure equalized, the station block gate (bypass valve) opened which allowed gas to flow through the open vents on the 30 inch pig launcher. The pig launcher had been left in an abnormal line-up, with the ili pig in the depressurized trap, for an early morning launch.
| Report Received Date | 2011-06-08 00:00:00 |
|---|---|
| Iyear | 2011 |
| Report Number | 20110170 |
| Supplemental Number | 15932 |
| 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 | 2011-05-11 16:15:00 |
| Location Latitude | 42.66713 Google Maps OpenStreetMap |
| Location Longitude | -85.95636 Google Maps OpenStreetMap |
| Nrc Rpt Num | 975983 NRC Report How to search |
| Nrc Rpt Datetime | 2011-05-11 17:55:00 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 4500 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Shutdown Due Accident Ind | No |
| Shutdown Explain | Following The Investigation Of The Gas Release, The Station Was Returned To Serv |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Mi |
| Onshore Postal Code | 49419 |
| Onshore City Name | Hamilton |
| Onshore County Name | Allegan |
| Pipe Fac Name | Hamilton Compressor Station |
| Federal | No |
| Location Type | Operator-Controlled Property |
| Incident Area Type | Aboveground |
| Incident Area Subtype | Other |
| Incident Area Details | Compressor Station |
| Crossing | No |
| Pipe Facility Type | Interstate |
| System Part Involved | Onshore Compressor Station Equipment And Piping |
| Item Involved | Other |
| Item Involved Details | Station Block Gate (Bypass Valve) |
| Material Involved | Carbon Steel |
| Release Type | Other |
| Release Type Details | When The Station Pressure Equalized, The Station Block Gate (Bypass Valve) Opened Which Allowed Gas To Flow Through The Open Vents On The 30 Inch Pig Launcher. The Pig Launcher Had Been Left In An Abnormal Line-Up, With The Ili Pig In The Depressurized Trap, For An Early Morning Launch. |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 369 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 20250 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 0 |
| Est Cost Emergency | 40000 |
| Est Cost Other | 0 |
| Est Cost Other Details | 0 |
| Prpty | 60250 |
| Accident Psig | 876 |
| Mop Psig | 850 |
| Mop Cfr Section | Not On Omb-Approved Form When Submitted View CFR 49 §192 |
| Accident Pressure | Pressure Exceeded Maop, But Did Not Exceed The Applicable Allowance In 192.201 |
| 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 | Local Operating Personnel, Including Contractors |
| Operator Type | Operator Employee |
| 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 local operations personnel had been performing maintenance work and therefore were responsible for operating the equipment that may not have been utilized properly. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Incorrect Operation |
| Cause Details | Pipeline Or Equipment Overpressured |
| Operation Type | Pipeline Or Equipment Overpressured |
| Related Inadequate Proc Ind | Yes |
| 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 | 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 | The hamilton station, operating at 809 psi, tripped on main line over pressure due to a high pressure condition in the trip circuitry piping. It is believed that high temperatures in the building caused the pressure to increase above the 876 psi set point. When the station pressure equalized, the station block gate (bypass valve) opened which allowed gas to flow through the open vents on the 30 inch pig launcher. The pig launcher had been left in an abnormal line-up, with the ili pig in the depressurized trap, for an early morning launch. |
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