Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2024-06-28 — PA
Operator
Ugi Utilities, Inc
Cause
Equipment Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$65,047
Incident datetime
2024-06-28 00:00 UTC
Report number
Location
PA
Narrative
On may 30, 2024, a body vent fitting on an above-ground 12-inch valve began leaking to atmosphere after it was operated as part of an in-line inspection of a natural gas transmission pipeline. The 12-inch valve was associated with the isolation of a pig receiver location involved in the in-line inspection project. The leak was continuously monitored by ugi personnel until the valve was replaced on june 18, 2024. On july 7, 2025, a supplemental and final report is being filed to provide updated incident information. Ugi consulted with the valve manufacturer who examined and investigated the valve. Ugi subsequently performed a root cause analysis of the event. Ugi concluded that the root cause of this event was attributable to the valve seals that were exposed to debris such as weld slag. Weld slag was found embedded into the seals and did not allow the valve to seal completely. The body bleed valve also did not seal and was stripped while being operated and leaked continuously to atmosphere for a short duration. Ugi was able to stop the leak until the final repair could be made. Based on the small opening of the body bleed valve, the escaping gas was negligible.
Detailed record list
Report Received Date
2024-06-28 00:00:00
Iyear
2024
Report Number
20240086
Supplemental Number
41124
Report Type
Supplemental Final
Operator Id
20010
Name
Ugi Utilities, Inc
Operator Street Address
1 Ugi Drive
Operator City Name
Denver
Operator State Abbreviation
PA
Operator Postal Code
17517
Time Zone
Eastern
Daylight Savings Ind
Yes
Location Latitude
41.579134
Location Longitude
-75.501083
Nrc Rpt Num
1400965
Additional Nrc Report Numbers
1401182
Commodity Released Type
Natural Gas
Unintentional Release
1
Intentional Release
13.8
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Status When Identified
Normal Operation, Includes Pauses During Maintenance
Shutdown Due Accident Ind
No
Shutdown Explain
The Leak Was Made Safe, But Monitored 24/7 Until A Permanent Repair Was Made.
Communication State Fed Ind
No
Ignite Ind
No
Upstream Action Taken
Operational Control
Upstream Oprtnl Cntrl Detail
Upstream Valves Were Checked For Proper Operation In Case Of Emergency.
Downstream Action Taken
Operational Control
Downstream Oprtnl Cntrl Detail
No Action Was Taken As The Incident Area Was Already Isolated From The Down Stream System.
Num Pub Evacuated
0
On Off Shore
Onshore
Onshore State Abbreviation
Pa
Onshore Postal Code
18407
Onshore City Name
Carbondale
Onshore County Name
Lackawanna
Designated Location
Not Applicable
Pipe Fac Name
Uniondale 24
Segment Name
Valve 886642
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
Scraper/pig Trap
Installation Year
2017
Manufactured Year
2016
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Other
Leak Type Other
Body Bleed Valve Leaking
Class Location Type
Class 3 Location
Could Be Hca
Yes
Determination Method
Method2
Pir Radius
527
Heat Damage Ind
No
Non Heat Damage Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
5
Est Cost Intentional Release
65
Est Cost Prop Damage
65047
Est Cost Emergency
332638
Est Cost Other
0
Gas Cost In Mcf
4.71
Prpty
397755
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
0
Num Business Building Affctd
0
Wildlife Impact Ind
No
Accident Psig
890
Gas Flow In Pipe In Mcf
0
Mop Psig
1014
Mop Cfr Section
192.619(A)(1)
Maop Established Date
2017-11-01 00:00:00
Maop Reversal Flow Ind
No
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Gas Required Odorized Ind
Yes
Gas Odorized Ind
Yes
Length Segment Isolated
200
Internal Inspection Ind
Yes
Operation Complications Ind
No
Pipeline Function
Transmission Line Of Distribution 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
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 actions of gas control personnel did not contribute to this incident nor impact emergency response activities.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Equipment Failure
Cause Details
Other Equipment Failure
Eq Failure Type
Other Equipment Failure
Eq Failure Details
Debris Found In Internal Valve Seat Resulting In Inability For Valve To Seal Completely.
Additional Erosion Wear Ind
Yes
Preparer Name
C*** R*****
Preparer Title
Standards Engineer
Preparer Email
C******@u**.com
Preparer Telephone
484-577-6666
Local Contact Name
J*** T*****
Local Contact Email
J******@u**.com
Local Contact Telephone
717-675-4606
Authorizer Name
P***** J*****
Authorizer Title
Vp Ehs And Technical Support
Authorizer Telephone
484-824-5508
Authorizer Email
P******@u**.com
Narrative
On may 30, 2024, a body vent fitting on an above-ground 12-inch valve began leaking to atmosphere after it was operated as part of an in-line inspection of a natural gas transmission pipeline. The 12-inch valve was associated with the isolation of a pig receiver location involved in the in-line inspection project. The leak was continuously monitored by ugi personnel until the valve was replaced on june 18, 2024. On july 7, 2025, a supplemental and final report is being filed to provide updated incident information. Ugi consulted with the valve manufacturer who examined and investigated the valve. Ugi subsequently performed a root cause analysis of the event. Ugi concluded that the root cause of this event was attributable to the valve seals that were exposed to debris such as weld slag. Weld slag was found embedded into the seals and did not allow the valve to seal completely. The body bleed valve also did not seal and was stripped while being operated and leaked continuously to atmosphere for a short duration. Ugi was able to stop the leak until the final repair could be made. Based on the small opening of the body bleed valve, the escaping gas was negligible.
| Report Received Date | 2024-06-28 00:00:00 |
|---|---|
| Iyear | 2024 |
| Report Number | 20240086 |
| Supplemental Number | 41124 |
| Report Type | Supplemental Final |
| Operator Id | 20010 PHMSA Enforcement |
| Name | Ugi Utilities, Inc |
| Operator Street Address | 1 Ugi Drive |
| Operator City Name | Denver |
| Operator State Abbreviation | PA |
| Operator Postal Code | 17517 |
| Time Zone | Eastern |
| Daylight Savings Ind | Yes |
| Location Latitude | 41.579134 Google Maps OpenStreetMap |
| Location Longitude | -75.501083 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1400965 NRC Report How to search |
| Additional Nrc Report Numbers | 1401182 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 1 |
| Intentional Release | 13.8 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Status When Identified | Normal Operation, Includes Pauses During Maintenance |
| Shutdown Due Accident Ind | No |
| Shutdown Explain | The Leak Was Made Safe, But Monitored 24/7 Until A Permanent Repair Was Made. |
| Communication State Fed Ind | No |
| Ignite Ind | No |
| Upstream Action Taken | Operational Control |
| Upstream Oprtnl Cntrl Detail | Upstream Valves Were Checked For Proper Operation In Case Of Emergency. |
| Downstream Action Taken | Operational Control |
| Downstream Oprtnl Cntrl Detail | No Action Was Taken As The Incident Area Was Already Isolated From The Down Stream System. |
| Num Pub Evacuated | 0 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Pa |
| Onshore Postal Code | 18407 |
| Onshore City Name | Carbondale |
| Onshore County Name | Lackawanna |
| Designated Location | Not Applicable |
| Pipe Fac Name | Uniondale 24 |
| Segment Name | Valve 886642 |
| 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 | Scraper/pig Trap |
| Installation Year | 2017 |
| Manufactured Year | 2016 |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Other |
| Leak Type Other | Body Bleed Valve Leaking |
| Class Location Type | Class 3 Location |
| Could Be Hca | Yes |
| Determination Method | Method2 |
| Pir Radius | 527 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 5 |
| Est Cost Intentional Release | 65 |
| Est Cost Prop Damage | 65047 |
| Est Cost Emergency | 332638 |
| Est Cost Other | 0 |
| Gas Cost In Mcf | 4.71 |
| Prpty | 397755 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 0 |
| Num Business Building Affctd | 0 |
| Wildlife Impact Ind | No |
| Accident Psig | 890 |
| Gas Flow In Pipe In Mcf | 0 |
| Mop Psig | 1014 |
| Mop Cfr Section | 192.619(A)(1) View CFR 49 §192 |
| Maop Established Date | 2017-11-01 00:00:00 |
| Maop Reversal Flow Ind | No |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | No |
| Gas Required Odorized Ind | Yes |
| Gas Odorized Ind | Yes |
| Length Segment Isolated | 200 |
| Internal Inspection Ind | Yes |
| Operation Complications Ind | No |
| Pipeline Function | Transmission Line Of Distribution 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 | 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 actions of gas control personnel did not contribute to this incident nor impact emergency response activities. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Equipment Failure |
| Cause Details | Other Equipment Failure |
| Eq Failure Type | Other Equipment Failure |
| Eq Failure Details | Debris Found In Internal Valve Seat Resulting In Inability For Valve To Seal Completely. |
| Additional Erosion Wear Ind | Yes |
| Preparer Name | C*** R***** |
| Preparer Title | Standards Engineer |
| Preparer Email | C******@u**.com |
| Preparer Telephone | 484-577-6666 |
| Local Contact Name | J*** T***** |
| Local Contact Email | J******@u**.com |
| Local Contact Telephone | 717-675-4606 |
| Authorizer Name | P***** J***** |
| Authorizer Title | Vp Ehs And Technical Support |
| Authorizer Telephone | 484-824-5508 |
| Authorizer Email | P******@u**.com |
| Narrative | On may 30, 2024, a body vent fitting on an above-ground 12-inch valve began leaking to atmosphere after it was operated as part of an in-line inspection of a natural gas transmission pipeline. The 12-inch valve was associated with the isolation of a pig receiver location involved in the in-line inspection project. The leak was continuously monitored by ugi personnel until the valve was replaced on june 18, 2024. On july 7, 2025, a supplemental and final report is being filed to provide updated incident information. Ugi consulted with the valve manufacturer who examined and investigated the valve. Ugi subsequently performed a root cause analysis of the event. Ugi concluded that the root cause of this event was attributable to the valve seals that were exposed to debris such as weld slag. Weld slag was found embedded into the seals and did not allow the valve to seal completely. The body bleed valve also did not seal and was stripped while being operated and leaked continuously to atmosphere for a short duration. Ugi was able to stop the leak until the final repair could be made. Based on the small opening of the body bleed valve, the escaping gas was negligible. |
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