Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2024-12-18 — MI
Operator
Midwestern Gas Transmission Co
Cause
Material Failure Of Pipe Or Weld
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$182,000
Incident datetime
2024-12-18 00:00 UTC
Report number
Location
MI
Narrative
11/18/2024 at 13:30 hours, a pipeline operator was conducting a routine inspection and discovered a leak on pipeline m2115-1. The pipeline was isolated and less than 3 mmcf was released. The pipeline was excavated, and a crack was located near in the heat affected zone of a fillet weld at the 6 o'clock position. The crack was on the 30" mainline piping adjacent to a spherical tee that was installed for a pipeline hot tap. Determination was made that the repair would exceed the reporting threshold of $145,400 and notification was made to the nrc at 11:20 am on 11/19/24. The spherical tee was removed, and a barred tee was installed on sunday,11/24/24. The pipeline was placed back into service on monday, 11/25/24. A third-party failure analysis was performed on the component. The root cause was identified as an issue in the welding process. Contributing factors included insufficient pre-heat and lack of cleanliness in the fillet weld.
Detailed record list
Report Received Date
2024-12-18 00:00:00
Iyear
2024
Report Number
20240140
Supplemental Number
41084
Report Type
Supplemental Final
Operator Id
12498
Name
Midwestern Gas Transmission Co
Operator Street Address
500 Woodward Ave Suite 2900
Operator City Name
Detroit
Operator State Abbreviation
MI
Operator Postal Code
48226
Time Zone
Central
Daylight Savings Ind
No
Location Latitude
39.78075
Location Longitude
-87.65147
Nrc Rpt Num
1416806
Commodity Released Type
Natural Gas
Unintentional Release
2390
Intentional Release
23953
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
Yes
Communication State Fed Ind
No
Ignite Ind
No
Upstream Action Taken
Valve Closure
Downstream Action Taken
Valve Closure
Num Pub Evacuated
0
On Off Shore
Onshore
Onshore State Abbreviation
Il
Onshore Postal Code
61944
Onshore City Name
Chrisman
Onshore County Name
Edgar
Designated Location
Milepost
Designated Name
0
Pipe Fac Name
Midwestern Gas
Segment Name
2115 Paris Pipeline
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
60
Other Underground Facilities
No
Crossing
No
Pipe Facility Type
Interstate
System Part Involved
Onshore Pipeline, Including Valve Sites
Item Involved
Weld/fusion, Including Heat-Affected Zone
Pipe Diameter
30
Pipe Wall Thickness
0.5
Pipe Smys
52000
Pipe Specification
X52
Pipe Seam Type
Longitudinal Erw - Low Frequency
Pipe Manufacturer
National Line Pipe
Pipe Coating Type
Other
Pipe Coating Details
Sp2888 2-Part Field Applied Epoxy
Coating Applied Ind
Yes
Weld Subtype
Pipe Girth Weld
Different Girth Weld Ind
No
Installation Year
2024
Manufactured Year
2024
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Crack
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
680
Heat Damage Ind
No
Non Heat Damage Ind
No
Did Occur In Mca Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
5401
Est Cost Intentional Release
54134
Est Cost Prop Damage
182000
Est Cost Emergency
0
Est Cost Other
0
Gas Cost In Mcf
2.26
Prpty
241535
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
792
Gas Flow In Pipe In Mcf
181000
Mop Psig
936
Mop Cfr Section
192.619(C)
Maop Established Date
1970-07-01 00:00:00
Maop Reversal Flow Ind
No
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Gas Required Odorized Ind
No
Upstream Valve Type Ind
Manual
Downstream Valve Type Ind
Manual
Length Segment Isolated
88089
Internal Inspection Ind
Yes
Operation Complications 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
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
This incident was not the result of any negligence on the part of the controller.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Material Failure Of Pipe Or Weld
Cause Details
Design-, Construction-, Installation-, Or Fabrication-Related
Pwjf Failure Type
Design-, Construction-, Installation-, Or Fabrication-Related
Field Exam Ind
Yes
Metallurgical Ind
Yes
Other Factor
Yes
Other Factor Details
Insufficient Pre-Heat And Lack Of Cleanliness In The Fillet Weld.
Additional Crack Ind
Yes
Post Constr Pressure Test Val
Unknown
Collected Data Ind
Yes
Axial Magnetic Flx Lkg Ind
Yes
Geometry Deformation Ind
Yes
Axial Recent Year
2024
Axial Rcnt Propul Method
Free Swimming
Axial Rcnt Attuned Detect
Metal Loss
Axial Rcnt Atnd Dtct Metal
High Resolution
Axial Previous Year
2024
Axial Prev Propul Method
Free Swimming
Axial Prev Attuned Detect
Metal Loss
Axial Prev Atnd Dtct Metal
High Resolution
Geometry Recent Year
2024
Geometry Rcnt Propul Method
Free Swimming
Geometry Rcnt Resolution
High Resolution
Geometrt Rcnt Measur Cups
Inside Ili Cups
Geometry Previous Year
2024
Geometry Prev Propul Method
Free Swimming
Geometry Prev Resolution
High Resolution
Geometrt Prev Measur Cups
Inside Ili Cups
Has Hydrtst Conduc Before Ind
No
Direct Asmnt Conducted
No
Non Destructive Exam Ind
No
Preparer Name
A*** T****
Preparer Title
Codes And Compliance Specialist
Preparer Email
A*********@d**********.com
Preparer Telephone
2623742756
Local Contact Name
H**** T*******
Local Contact Email
H*************@d**********.com
Local Contact Telephone
2055407961
Authorizer Name
P***** C******
Authorizer Title
Director Codes And Regulatory
Authorizer Telephone
3137742406
Authorizer Email
P*************@d**********.com
Narrative
11/18/2024 at 13:30 hours, a pipeline operator was conducting a routine inspection and discovered a leak on pipeline m2115-1. The pipeline was isolated and less than 3 mmcf was released. The pipeline was excavated, and a crack was located near in the heat affected zone of a fillet weld at the 6 o'clock position. The crack was on the 30" mainline piping adjacent to a spherical tee that was installed for a pipeline hot tap. Determination was made that the repair would exceed the reporting threshold of $145,400 and notification was made to the nrc at 11:20 am on 11/19/24. The spherical tee was removed, and a barred tee was installed on sunday,11/24/24. The pipeline was placed back into service on monday, 11/25/24. A third-party failure analysis was performed on the component. The root cause was identified as an issue in the welding process. Contributing factors included insufficient pre-heat and lack of cleanliness in the fillet weld.
| Report Received Date | 2024-12-18 00:00:00 |
|---|---|
| Iyear | 2024 |
| Report Number | 20240140 |
| Supplemental Number | 41084 |
| Report Type | Supplemental Final |
| Operator Id | 12498 PHMSA Enforcement |
| Name | Midwestern Gas Transmission Co |
| Operator Street Address | 500 Woodward Ave Suite 2900 |
| Operator City Name | Detroit |
| Operator State Abbreviation | MI |
| Operator Postal Code | 48226 |
| Time Zone | Central |
| Daylight Savings Ind | No |
| Location Latitude | 39.78075 Google Maps OpenStreetMap |
| Location Longitude | -87.65147 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1416806 NRC Report How to search |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 2390 |
| Intentional Release | 23953 |
| 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 | Yes |
| Communication State Fed Ind | No |
| Ignite Ind | No |
| Upstream Action Taken | Valve Closure |
| Downstream Action Taken | Valve Closure |
| Num Pub Evacuated | 0 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Il |
| Onshore Postal Code | 61944 |
| Onshore City Name | Chrisman |
| Onshore County Name | Edgar |
| Designated Location | Milepost |
| Designated Name | 0 |
| Pipe Fac Name | Midwestern Gas |
| Segment Name | 2115 Paris Pipeline |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 60 |
| Other Underground Facilities | No |
| Crossing | No |
| Pipe Facility Type | Interstate |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| Item Involved | Weld/fusion, Including Heat-Affected Zone |
| Pipe Diameter | 30 |
| Pipe Wall Thickness | 0.5 |
| Pipe Smys | 52000 |
| Pipe Specification | X52 |
| Pipe Seam Type | Longitudinal Erw - Low Frequency |
| Pipe Manufacturer | National Line Pipe |
| Pipe Coating Type | Other |
| Pipe Coating Details | Sp2888 2-Part Field Applied Epoxy |
| Coating Applied Ind | Yes |
| Weld Subtype | Pipe Girth Weld |
| Different Girth Weld Ind | No |
| Installation Year | 2024 |
| Manufactured Year | 2024 |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Crack |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 680 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Did Occur In Mca Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 5401 |
| Est Cost Intentional Release | 54134 |
| Est Cost Prop Damage | 182000 |
| Est Cost Emergency | 0 |
| Est Cost Other | 0 |
| Gas Cost In Mcf | 2.26 |
| Prpty | 241535 |
| 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 | 792 |
| Gas Flow In Pipe In Mcf | 181000 |
| Mop Psig | 936 |
| Mop Cfr Section | 192.619(C) View CFR 49 §192 |
| Maop Established Date | 1970-07-01 00:00:00 |
| Maop Reversal Flow Ind | No |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | No |
| Gas Required Odorized Ind | No |
| Upstream Valve Type Ind | Manual |
| Downstream Valve Type Ind | Manual |
| Length Segment Isolated | 88089 |
| Internal Inspection Ind | Yes |
| Operation Complications 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 | 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 | This incident was not the result of any negligence on the part of the controller. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Material Failure Of Pipe Or Weld |
| Cause Details | Design-, Construction-, Installation-, Or Fabrication-Related |
| Pwjf Failure Type | Design-, Construction-, Installation-, Or Fabrication-Related |
| Field Exam Ind | Yes |
| Metallurgical Ind | Yes |
| Other Factor | Yes |
| Other Factor Details | Insufficient Pre-Heat And Lack Of Cleanliness In The Fillet Weld. |
| Additional Crack Ind | Yes |
| Post Constr Pressure Test Val | Unknown |
| Collected Data Ind | Yes |
| Axial Magnetic Flx Lkg Ind | Yes |
| Geometry Deformation Ind | Yes |
| Axial Recent Year | 2024 |
| Axial Rcnt Propul Method | Free Swimming |
| Axial Rcnt Attuned Detect | Metal Loss |
| Axial Rcnt Atnd Dtct Metal | High Resolution |
| Axial Previous Year | 2024 |
| Axial Prev Propul Method | Free Swimming |
| Axial Prev Attuned Detect | Metal Loss |
| Axial Prev Atnd Dtct Metal | High Resolution |
| Geometry Recent Year | 2024 |
| Geometry Rcnt Propul Method | Free Swimming |
| Geometry Rcnt Resolution | High Resolution |
| Geometrt Rcnt Measur Cups | Inside Ili Cups |
| Geometry Previous Year | 2024 |
| Geometry Prev Propul Method | Free Swimming |
| Geometry Prev Resolution | High Resolution |
| Geometrt Prev Measur Cups | Inside Ili Cups |
| Has Hydrtst Conduc Before Ind | No |
| Direct Asmnt Conducted | No |
| Non Destructive Exam Ind | No |
| Preparer Name | A*** T**** |
| Preparer Title | Codes And Compliance Specialist |
| Preparer Email | A*********@d**********.com |
| Preparer Telephone | 2623742756 |
| Local Contact Name | H**** T******* |
| Local Contact Email | H*************@d**********.com |
| Local Contact Telephone | 2055407961 |
| Authorizer Name | P***** C****** |
| Authorizer Title | Director Codes And Regulatory |
| Authorizer Telephone | 3137742406 |
| Authorizer Email | P*************@d**********.com |
| Narrative | 11/18/2024 at 13:30 hours, a pipeline operator was conducting a routine inspection and discovered a leak on pipeline m2115-1. The pipeline was isolated and less than 3 mmcf was released. The pipeline was excavated, and a crack was located near in the heat affected zone of a fillet weld at the 6 o'clock position. The crack was on the 30" mainline piping adjacent to a spherical tee that was installed for a pipeline hot tap. Determination was made that the repair would exceed the reporting threshold of $145,400 and notification was made to the nrc at 11:20 am on 11/19/24. The spherical tee was removed, and a barred tee was installed on sunday,11/24/24. The pipeline was placed back into service on monday, 11/25/24. A third-party failure analysis was performed on the component. The root cause was identified as an issue in the welding process. Contributing factors included insufficient pre-heat and lack of cleanliness in the fillet weld. |
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