Incident details
Operator, cause, commodity and consequences with raw source fields.
GD incident on 2013-01-23 — PA
Operator
Peoples Natural Gas Company Llc
Cause
Equipment Failure
Commodity
—
Program
GD
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$14,315
Incident datetime
2013-01-23 01:02
Report number
Location
PA, BLAIR
Narrative
On 1/23/2013 at 1:03 am png gas control received an over pressure alarm form system 217, 60th street district regulator station (ls 1723) in altoona, pa. At 1:10 am a gas measurement and regulation technician was dispatched and arrived on site at 1:50 am. After accessing the situation, the technician manually throttled back inlet valves and had the system back to 150# maop by 2:13 am. Post incident evaluation of regulator revealed a boot failure in the system and reliefs that did not respond to tested set point. Follow up actions taken include leak survey of all mains and services within over pressured system by 9:00 pm on 1/23/2013. Gas measurement and regulator technicians continuously monitored system and on 1/24/2013, a worker-monitor system with relief was installed to replace existing worker-relief set up. All downstream regulating equipment on system 217 was inspected on 1/25/2013. A second follow up leak survey was conducted of all mains and services of system 217 on 2/1/2013. A standby regulator run, locked out of service from time of incident, was also revised on 8/19/2013 from worker/relief to worker/monitor plus relief on 8/21/2013, and placed back into operation. A field test of system relief valves was conducted on 9/5/2013, confirming overprotection capabilities under load.
Detailed record list
Occurred At
2013-01-23 01:02:00
Year
2013
Report Received Date
2013-02-22 00:00:00
Iyear
2013.0
Report Number
20130020.0
Supplemental Number
15729.0
Report Type
Supplemental Final
Operator Id
15350
Name
Peoples Natural Gas Company Llc
Operator Street Address
375 North Shore Drive Suite 600
Operator City Name
Pittsburgh
Operator State Abbreviation
PA
Operator Postal Code
15212
Local Datetime
2013-01-23 01:02:00
Location Street Address
60th Street And Oak Ave
Location City Name
Altoona
Location County Name
Blair
Location State Abbreviation
PA
Location Postal Code
16602
Location Latitude
40.476659
Location Longitude
-78.435917
Nrc Rpt Datetime
2013-01-23 11:21:00
Nrc Rpt Num
1036357
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0.0
Incident Identified Datetime
2013-01-23 01:02:00
On Site Datetime
2013-01-23 01:50:00
Federal
No
Location Type
Operator-Controlled Property
Incident Area Type
Aboveground
Incident Area Subtype
Typical Aboveground Facility Piping Or Appurtenance (E.g. Value Or Regulator Station, Outdoor Meter Set)
Crossing
No
Pipe Facility Type
Privately Owned
System Part Involved
District Regulator/metering Station
Installation Year
1970.0
Material Involved
Other
Material Details
Steel Body Relief Device
Release Type
Other
Release Type Details
System Over Pressure
Class Location Type
Class 3 Location
Est Cost Oper Paid
0.0
Est Cost Prop Damage
14315.0
Est Cost Emergency
0.0
Est Cost Other
0.0
Est Cost Unintentional Release
0.0
Prpty
14315.0
Commercial Affected
0.0
Industrial Affected
0.0
Residences Affected
0.0
Accident Psig
205.0
Normal Psig
145.0
Mop Psig
150.0
Accident Pressure
Pressure Exceeded The Applicable Allowance In 192.201
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
Yes
Scada Conf Ind
Yes
Accident Identifier
Controller
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
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
Pressure Regulator Ind
Yes
Preparer Name
M****** L* S****
Preparer Title
Compliance Process Manager
Preparer Email
M**************@p**********.com
Preparer Telephone
1-412-244-2605
Authorizer Name
K****** M* J*******
Authorizer Title
Sr. Vice President Chief Operating Officer
Authorizer Telephone
1-412-208-7930
Authorizer Email
K*****************@p**********.com
Narrative
On 1/23/2013 at 1:03 am png gas control received an over pressure alarm form system 217, 60th street district regulator station (ls 1723) in altoona, pa. At 1:10 am a gas measurement and regulation technician was dispatched and arrived on site at 1:50 am. After accessing the situation, the technician manually throttled back inlet valves and had the system back to 150# maop by 2:13 am. Post incident evaluation of regulator revealed a boot failure in the system and reliefs that did not respond to tested set point. Follow up actions taken include leak survey of all mains and services within over pressured system by 9:00 pm on 1/23/2013. Gas measurement and regulator technicians continuously monitored system and on 1/24/2013, a worker-monitor system with relief was installed to replace existing worker-relief set up. All downstream regulating equipment on system 217 was inspected on 1/25/2013. A second follow up leak survey was conducted of all mains and services of system 217 on 2/1/2013. A standby regulator run, locked out of service from time of incident, was also revised on 8/19/2013 from worker/relief to worker/monitor plus relief on 8/21/2013, and placed back into operation. A field test of system relief valves was conducted on 9/5/2013, confirming overprotection capabilities under load.
| Occurred At | 2013-01-23 01:02:00 |
|---|---|
| Year | 2013 |
| Report Received Date | 2013-02-22 00:00:00 |
| Iyear | 2013.0 |
| Report Number | 20130020.0 |
| Supplemental Number | 15729.0 |
| Report Type | Supplemental Final |
| Operator Id | 15350 PHMSA Enforcement |
| Name | Peoples Natural Gas Company Llc |
| Operator Street Address | 375 North Shore Drive Suite 600 |
| Operator City Name | Pittsburgh |
| Operator State Abbreviation | PA |
| Operator Postal Code | 15212 |
| Local Datetime | 2013-01-23 01:02:00 |
| Location Street Address | 60th Street And Oak Ave |
| Location City Name | Altoona |
| Location County Name | Blair |
| Location State Abbreviation | PA |
| Location Postal Code | 16602 |
| Location Latitude | 40.476659 Google Maps OpenStreetMap |
| Location Longitude | -78.435917 Google Maps OpenStreetMap |
| Nrc Rpt Datetime | 2013-01-23 11:21:00 |
| Nrc Rpt Num | 1036357 NRC Report How to search |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0.0 |
| Incident Identified Datetime | 2013-01-23 01:02:00 |
| On Site Datetime | 2013-01-23 01:50:00 |
| Federal | No |
| Location Type | Operator-Controlled Property |
| Incident Area Type | Aboveground |
| Incident Area Subtype | Typical Aboveground Facility Piping Or Appurtenance (E.g. Value Or Regulator Station, Outdoor Meter Set) |
| Crossing | No |
| Pipe Facility Type | Privately Owned |
| System Part Involved | District Regulator/metering Station |
| Installation Year | 1970.0 |
| Material Involved | Other |
| Material Details | Steel Body Relief Device |
| Release Type | Other |
| Release Type Details | System Over Pressure |
| Class Location Type | Class 3 Location |
| Est Cost Oper Paid | 0.0 |
| Est Cost Prop Damage | 14315.0 |
| Est Cost Emergency | 0.0 |
| Est Cost Other | 0.0 |
| Est Cost Unintentional Release | 0.0 |
| Prpty | 14315.0 |
| Commercial Affected | 0.0 |
| Industrial Affected | 0.0 |
| Residences Affected | 0.0 |
| Accident Psig | 205.0 |
| Normal Psig | 145.0 |
| Mop Psig | 150.0 |
| Accident Pressure | Pressure Exceeded The Applicable Allowance In 192.201 |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | Yes |
| Scada Conf Ind | Yes |
| Accident Identifier | Controller |
| 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 |
| 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 |
| Pressure Regulator Ind | Yes |
| Preparer Name | M****** L* S**** |
| Preparer Title | Compliance Process Manager |
| Preparer Email | M**************@p**********.com |
| Preparer Telephone | 1-412-244-2605 |
| Authorizer Name | K****** M* J******* |
| Authorizer Title | Sr. Vice President Chief Operating Officer |
| Authorizer Telephone | 1-412-208-7930 |
| Authorizer Email | K*****************@p**********.com |
| Narrative | On 1/23/2013 at 1:03 am png gas control received an over pressure alarm form system 217, 60th street district regulator station (ls 1723) in altoona, pa. At 1:10 am a gas measurement and regulation technician was dispatched and arrived on site at 1:50 am. After accessing the situation, the technician manually throttled back inlet valves and had the system back to 150# maop by 2:13 am. Post incident evaluation of regulator revealed a boot failure in the system and reliefs that did not respond to tested set point. Follow up actions taken include leak survey of all mains and services within over pressured system by 9:00 pm on 1/23/2013. Gas measurement and regulator technicians continuously monitored system and on 1/24/2013, a worker-monitor system with relief was installed to replace existing worker-relief set up. All downstream regulating equipment on system 217 was inspected on 1/25/2013. A second follow up leak survey was conducted of all mains and services of system 217 on 2/1/2013. A standby regulator run, locked out of service from time of incident, was also revised on 8/19/2013 from worker/relief to worker/monitor plus relief on 8/21/2013, and placed back into operation. A field test of system relief valves was conducted on 9/5/2013, confirming overprotection capabilities under load. |
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