Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2012-11-23 — TX
Operator
Pvr Marcellus Gas Gathering, Llc
Cause
Equipment Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$0
Incident datetime
2012-11-23 03:05
Report number
Location
TX
Narrative
On friday, november 23rd at 3:00 am, a 4 inch anderson greenwood pressure relief valve on the inlet side of the chapin dehydration facility malfunctioned causing non-odorized gas to be released to the atmosphere. A pvr operator and the local fire department responded to the facility. The incident lasted for approximately 30 minutes before the local operator manually closed the block valve under the relief valve to stop the gas from venting. Since natural gas is lighter than air, the released volume quickly dissipated without any risk to the public, environment, or employees. An internal investigation team determined that the presence of ice in the pilot sensing line of the valve was likely the cause of the equipment malfunction. The valve was sent to a third party for further inspection and analysis. The third party could not definitively determine whether ice resulted in the malfunction. However, the report does state that ice could have very well been the primary causal factor. Due to redundant overpressure protection on this system, pvr does not plan to reinstall a valve at this location.
Detailed record list
Report Received Date
2012-12-20 00:00:00
Iyear
2012
Report Number
20120127
Supplemental Number
15720
Report Type
Supplemental Final
Operator Id
32668
Name
Pvr Marcellus Gas Gathering, Llc
Operator Street Address
301 Commerce, Ste 700
Operator City Name
Fort Worth
Operator State Abbreviation
TX
Operator Postal Code
76102
Local Datetime
2012-11-23 03:00:00
Location Latitude
41.391058
Location Longitude
-75.985302
Nrc Rpt Num
1031807
Nrc Rpt Datetime
2012-11-28 19:17:00
Commodity Released Type
Natural Gas
Unintentional Release
5400
Intentional Release
0
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2012-11-23 03:26:00
Restart Datetime
2012-11-23 04:31:00
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Incident Identified Datetime
2012-11-23 03:05:00
On Site Datetime
2012-11-23 03:21:00
On Off Shore
Onshore
Onshore State Abbreviation
Pa
Onshore Postal Code
18612
Onshore City Name
Dallas
Onshore County Name
Monroe Township
Pipe Fac Name
Wyoming 24" At Chapin 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
Intrastate
System Part Involved
Onshore Pipeline, Including Valve Sites
Item Involved
Valve
Valve Type
Relief Valve
Installation Year
2012
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Other
Leak Type Other
Faulty Relief Valve
Class Location Type
Class 2 Location
Could Be Hca
No
Pir Radius
637
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
21060
Est Cost Intentional Release
0
Est Cost Prop Damage
0
Est Cost Emergency
0
Est Cost Other
0
Prpty
21060
Accident Psig
1172
Mop Psig
1480
Mop Cfr Section
Not On Omb-Approved Form When Submitted
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Upstream Valve Type Ind
Manual
Downstream Valve Type Ind
Manual
Length Segment Isolated
1
Internal Inspection Ind
Yes
Operation Complications Ind
No
Pipeline Function
Type A Gathering
Scada In Place Ind
No
Accident Identifier
Notification From Public
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
Equipment Failure
Cause Details
Malfunction Of Control/relief Equipment
Eq Failure Type
Malfunction Of Control/relief Equipment
Relief Valve Ind
Yes
Additional Defect Ind
Yes
Preparer Name
E***** S*********
Preparer Title
Safety And Regulatory Compliance Manager
Preparer Email
E**********@p**********.com
Preparer Telephone
5705053777
Preparer Fax
5705053798
Authorizer Name
E***** S*********
Authorizer Title
Safety And Regulatory Compliance Manager
Authorizer Telephone
5705053777
Authorizer Email
E**********@p**********.com
Narrative
On friday, november 23rd at 3:00 am, a 4 inch anderson greenwood pressure relief valve on the inlet side of the chapin dehydration facility malfunctioned causing non-odorized gas to be released to the atmosphere. A pvr operator and the local fire department responded to the facility. The incident lasted for approximately 30 minutes before the local operator manually closed the block valve under the relief valve to stop the gas from venting. Since natural gas is lighter than air, the released volume quickly dissipated without any risk to the public, environment, or employees. An internal investigation team determined that the presence of ice in the pilot sensing line of the valve was likely the cause of the equipment malfunction. The valve was sent to a third party for further inspection and analysis. The third party could not definitively determine whether ice resulted in the malfunction. However, the report does state that ice could have very well been the primary causal factor. Due to redundant overpressure protection on this system, pvr does not plan to reinstall a valve at this location.
| Report Received Date | 2012-12-20 00:00:00 |
|---|---|
| Iyear | 2012 |
| Report Number | 20120127 |
| Supplemental Number | 15720 |
| Report Type | Supplemental Final |
| Operator Id | 32668 PHMSA Enforcement |
| Name | Pvr Marcellus Gas Gathering, Llc |
| Operator Street Address | 301 Commerce, Ste 700 |
| Operator City Name | Fort Worth |
| Operator State Abbreviation | TX |
| Operator Postal Code | 76102 |
| Local Datetime | 2012-11-23 03:00:00 |
| Location Latitude | 41.391058 Google Maps OpenStreetMap |
| Location Longitude | -75.985302 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1031807 NRC Report How to search |
| Nrc Rpt Datetime | 2012-11-28 19:17:00 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 5400 |
| Intentional Release | 0 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2012-11-23 03:26:00 |
| Restart Datetime | 2012-11-23 04:31:00 |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2012-11-23 03:05:00 |
| On Site Datetime | 2012-11-23 03:21:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Pa |
| Onshore Postal Code | 18612 |
| Onshore City Name | Dallas |
| Onshore County Name | Monroe Township |
| Pipe Fac Name | Wyoming 24" At Chapin 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 | Intrastate |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| Item Involved | Valve |
| Valve Type | Relief Valve |
| Installation Year | 2012 |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Other |
| Leak Type Other | Faulty Relief Valve |
| Class Location Type | Class 2 Location |
| Could Be Hca | No |
| Pir Radius | 637 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 21060 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 0 |
| Est Cost Emergency | 0 |
| Est Cost Other | 0 |
| Prpty | 21060 |
| Accident Psig | 1172 |
| Mop Psig | 1480 |
| 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 |
| Upstream Valve Type Ind | Manual |
| Downstream Valve Type Ind | Manual |
| Length Segment Isolated | 1 |
| Internal Inspection Ind | Yes |
| Operation Complications Ind | No |
| Pipeline Function | Type A Gathering |
| Scada In Place Ind | No |
| Accident Identifier | Notification From Public |
| 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 | Equipment Failure |
| Cause Details | Malfunction Of Control/relief Equipment |
| Eq Failure Type | Malfunction Of Control/relief Equipment |
| Relief Valve Ind | Yes |
| Additional Defect Ind | Yes |
| Preparer Name | E***** S********* |
| Preparer Title | Safety And Regulatory Compliance Manager |
| Preparer Email | E**********@p**********.com |
| Preparer Telephone | 5705053777 |
| Preparer Fax | 5705053798 |
| Authorizer Name | E***** S********* |
| Authorizer Title | Safety And Regulatory Compliance Manager |
| Authorizer Telephone | 5705053777 |
| Authorizer Email | E**********@p**********.com |
| Narrative | On friday, november 23rd at 3:00 am, a 4 inch anderson greenwood pressure relief valve on the inlet side of the chapin dehydration facility malfunctioned causing non-odorized gas to be released to the atmosphere. A pvr operator and the local fire department responded to the facility. The incident lasted for approximately 30 minutes before the local operator manually closed the block valve under the relief valve to stop the gas from venting. Since natural gas is lighter than air, the released volume quickly dissipated without any risk to the public, environment, or employees. An internal investigation team determined that the presence of ice in the pilot sensing line of the valve was likely the cause of the equipment malfunction. The valve was sent to a third party for further inspection and analysis. The third party could not definitively determine whether ice resulted in the malfunction. However, the report does state that ice could have very well been the primary causal factor. Due to redundant overpressure protection on this system, pvr does not plan to reinstall a valve at this location. |
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