Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2019-10-04 — TX
Operator
Tennessee Gas Pipeline Company
Cause
Material Failure Of Pipe Or Weld
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$105,000
Incident datetime
2019-10-04 15:57
Report number
Location
TX
Narrative
Nrc #1260273; nrc #1260341 (48-hour); 36-inch tennessee gas pipeline company, l.L.C. (tgp); line 200-4 with hot tap receiving natural gas from tallgrass big muskingum meter station: at 15:45-hours, the landowner observed dirt blowing at the hot tap riser and notified a grandson who notified his brother, a tgp company employee. At 15:57-hours, employee arrived on site and confirmed a leak at the hot tap riser. At 16:15-hours, although the landowner's home was outside of the pir (more than 1,900 feet from the leak site) the landowner's grandson chose to relocate the landowner to a relative's home. The downstream and the upstream pipeline main line valves were closed at 17:15-hours. Following notification to applicable emergency responders, at 19:22-hours, blow-down of the pipeline valve section began. On october 5, 2019, at 00:05-hour, blow-down of the valve section was complete. Excavation at the hot tap site found the neck of the hot tap fitting contained a crack. The hot tap was cut out of the pipeline and the pipeline was repaired with replacement pipe. Due to changes in business needs, the hot tap connection will not be replaced. The hot tap fitting went through laboratory analysis for cause of the neck fillet weld crack. The january 17, 2020 metallurgical report concludes the hot tap neck fillet weld crack occurred from fatigue. Said report finds fatigue cause was stress and / or vibration from pulsation of the component and insufficient support of a nearby blow off valve assembly. No material deficiencies were found which would have contributed to the component failure.
Detailed record list
Report Received Date
2019-10-21 00:00:00
Iyear
2019
Report Number
20190114
Supplemental Number
33487
Report Type
Supplemental Final
Operator Id
19160
Name
Tennessee Gas Pipeline Company
Operator Street Address
1001 Louisiana St
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77002
Local Datetime
2019-10-04 15:45:00
Time Zone
Eastern
Daylight Savings Ind
Yes
Location Latitude
39.92457939
Location Longitude
-81.69147287
Nrc Rpt Num
1260273
Nrc Rpt Datetime
2019-10-04 16:37:00
Additional Nrc Report Numbers
1260341
Commodity Released Type
Natural Gas
Unintentional Release
897
Intentional Release
23595
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
Shutdown Datetime
2019-10-04 17:15:00
Restart Datetime
2019-10-08 05:40:00
Communication State Fed Ind
No
Ignite Ind
No
Upstream Action Taken
Valve Closure
Upstream Valve Close Datetime
2019-10-04 17:15:00
Downstream Action Taken
Valve Closure
Downstream Vlv Close Datetime
2019-10-04 17:15:00
Num Pub Evacuated
0
Incident Identified Datetime
2019-10-04 15:57:00
On Site Datetime
2019-10-04 15:57:00
On Off Shore
Onshore
Onshore State Abbreviation
Oh
Onshore Postal Code
43732
Onshore City Name
Not Within A Municipality
Onshore County Name
Muskingum
Designated Location
Milepost
Designated Name
208-4+11.53
Pipe Fac Name
Line 200-4
Segment Name
204-4 To 209-4
Federal
No
Location Type
Operator-Controlled Property
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
45
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
Weld Subtype
Fillet Weld
Installation Year
2009
Manufactured Year
2008
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Crack
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
698
Heat Damage Ind
No
Non Heat Damage Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
2153
Est Cost Intentional Release
56628
Est Cost Prop Damage
105000
Est Cost Emergency
1300
Est Cost Other
5825
Est Cost Other Details
Lab Analysis;
Gas Cost In Mcf
2.4
Prpty
170906
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
730
Gas Flow In Pipe In Mcf
746000
Mop Psig
790
Mop Cfr Section
192.619(A)(1)
Maop Established Date
1968-11-16 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
68957
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
Notification From Public
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
Immediate excavation at site found crack in the neck of the hot tap fitting; not control room detectable leak;
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
Metallurgical Ind
Yes
Fatigue Vibr Related
Yes
Failure Subtype
Mechanical Vibration
Mechanical Stress
Yes
Additional Crack Ind
Yes
Post Constr Pressure Test Val
2220
Collected Data Ind
Yes
Axial Magnetic Flx Lkg Ind
Yes
Axial Recent Year
2018
Axial Rcnt Propul Method
Free Swimming
Axial Rcnt Attuned Detect
Metal Loss
Axial Rcnt Atnd Dtct Metal
High Resolution
Axial Previous Year
2011
Axial Prev Propul Method
Free Swimming
Axial Prev Attuned Detect
Metal Loss
Axial Prev Atnd Dtct Metal
High Resolution
Has Hydrtst Conduc Before Ind
No
Direct Asmnt Conducted
No
Non Destructive Exam Ind
Yes
Exm Radiography Rcnt Year
2009
Exm Radiography Rcnt Ind
Yes
Preparer Name
W** M***** M*****
Preparer Title
Specialist-Pipeline Technical
Preparer Email
M************@k***********.com
Preparer Telephone
205-325-3863
Preparer Fax
205-325-3592
Local Contact Name
C*** B****
Local Contact Email
C*********@k***********.com
Local Contact Telephone
740-638-2101
Authorizer Name
J**** H********
Authorizer Title
Director Engineering Codes And Standards
Authorizer Telephone
713-369-9443
Authorizer Email
J**************@k***********.com
Narrative
Nrc #1260273; nrc #1260341 (48-hour); 36-inch tennessee gas pipeline company, l.L.C. (tgp); line 200-4 with hot tap receiving natural gas from tallgrass big muskingum meter station: at 15:45-hours, the landowner observed dirt blowing at the hot tap riser and notified a grandson who notified his brother, a tgp company employee. At 15:57-hours, employee arrived on site and confirmed a leak at the hot tap riser. At 16:15-hours, although the landowner's home was outside of the pir (more than 1,900 feet from the leak site) the landowner's grandson chose to relocate the landowner to a relative's home. The downstream and the upstream pipeline main line valves were closed at 17:15-hours. Following notification to applicable emergency responders, at 19:22-hours, blow-down of the pipeline valve section began. On october 5, 2019, at 00:05-hour, blow-down of the valve section was complete. Excavation at the hot tap site found the neck of the hot tap fitting contained a crack. The hot tap was cut out of the pipeline and the pipeline was repaired with replacement pipe. Due to changes in business needs, the hot tap connection will not be replaced. The hot tap fitting went through laboratory analysis for cause of the neck fillet weld crack. The january 17, 2020 metallurgical report concludes the hot tap neck fillet weld crack occurred from fatigue. Said report finds fatigue cause was stress and / or vibration from pulsation of the component and insufficient support of a nearby blow off valve assembly. No material deficiencies were found which would have contributed to the component failure.
| Report Received Date | 2019-10-21 00:00:00 |
|---|---|
| Iyear | 2019 |
| Report Number | 20190114 |
| Supplemental Number | 33487 |
| Report Type | Supplemental Final |
| Operator Id | 19160 PHMSA Enforcement |
| Name | Tennessee Gas Pipeline Company |
| Operator Street Address | 1001 Louisiana St |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77002 |
| Local Datetime | 2019-10-04 15:45:00 |
| Time Zone | Eastern |
| Daylight Savings Ind | Yes |
| Location Latitude | 39.92457939 Google Maps OpenStreetMap |
| Location Longitude | -81.69147287 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1260273 NRC Report How to search |
| Nrc Rpt Datetime | 2019-10-04 16:37:00 |
| Additional Nrc Report Numbers | 1260341 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 897 |
| Intentional Release | 23595 |
| 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 |
| Shutdown Datetime | 2019-10-04 17:15:00 |
| Restart Datetime | 2019-10-08 05:40:00 |
| Communication State Fed Ind | No |
| Ignite Ind | No |
| Upstream Action Taken | Valve Closure |
| Upstream Valve Close Datetime | 2019-10-04 17:15:00 |
| Downstream Action Taken | Valve Closure |
| Downstream Vlv Close Datetime | 2019-10-04 17:15:00 |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2019-10-04 15:57:00 |
| On Site Datetime | 2019-10-04 15:57:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Oh |
| Onshore Postal Code | 43732 |
| Onshore City Name | Not Within A Municipality |
| Onshore County Name | Muskingum |
| Designated Location | Milepost |
| Designated Name | 208-4+11.53 |
| Pipe Fac Name | Line 200-4 |
| Segment Name | 204-4 To 209-4 |
| Federal | No |
| Location Type | Operator-Controlled Property |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 45 |
| 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 |
| Weld Subtype | Fillet Weld |
| Installation Year | 2009 |
| Manufactured Year | 2008 |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Crack |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 698 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 2153 |
| Est Cost Intentional Release | 56628 |
| Est Cost Prop Damage | 105000 |
| Est Cost Emergency | 1300 |
| Est Cost Other | 5825 |
| Est Cost Other Details | Lab Analysis; |
| Gas Cost In Mcf | 2.4 |
| Prpty | 170906 |
| 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 | 730 |
| Gas Flow In Pipe In Mcf | 746000 |
| Mop Psig | 790 |
| Mop Cfr Section | 192.619(A)(1) View CFR 49 §192 |
| Maop Established Date | 1968-11-16 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 | 68957 |
| 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 | Notification From Public |
| 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 | Immediate excavation at site found crack in the neck of the hot tap fitting; not control room detectable leak; |
| 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 |
| Metallurgical Ind | Yes |
| Fatigue Vibr Related | Yes |
| Failure Subtype | Mechanical Vibration |
| Mechanical Stress | Yes |
| Additional Crack Ind | Yes |
| Post Constr Pressure Test Val | 2220 |
| Collected Data Ind | Yes |
| Axial Magnetic Flx Lkg Ind | Yes |
| Axial Recent Year | 2018 |
| Axial Rcnt Propul Method | Free Swimming |
| Axial Rcnt Attuned Detect | Metal Loss |
| Axial Rcnt Atnd Dtct Metal | High Resolution |
| Axial Previous Year | 2011 |
| Axial Prev Propul Method | Free Swimming |
| Axial Prev Attuned Detect | Metal Loss |
| Axial Prev Atnd Dtct Metal | High Resolution |
| Has Hydrtst Conduc Before Ind | No |
| Direct Asmnt Conducted | No |
| Non Destructive Exam Ind | Yes |
| Exm Radiography Rcnt Year | 2009 |
| Exm Radiography Rcnt Ind | Yes |
| Preparer Name | W** M***** M***** |
| Preparer Title | Specialist-Pipeline Technical |
| Preparer Email | M************@k***********.com |
| Preparer Telephone | 205-325-3863 |
| Preparer Fax | 205-325-3592 |
| Local Contact Name | C*** B**** |
| Local Contact Email | C*********@k***********.com |
| Local Contact Telephone | 740-638-2101 |
| Authorizer Name | J**** H******** |
| Authorizer Title | Director Engineering Codes And Standards |
| Authorizer Telephone | 713-369-9443 |
| Authorizer Email | J**************@k***********.com |
| Narrative | Nrc #1260273; nrc #1260341 (48-hour); 36-inch tennessee gas pipeline company, l.L.C. (tgp); line 200-4 with hot tap receiving natural gas from tallgrass big muskingum meter station: at 15:45-hours, the landowner observed dirt blowing at the hot tap riser and notified a grandson who notified his brother, a tgp company employee. At 15:57-hours, employee arrived on site and confirmed a leak at the hot tap riser. At 16:15-hours, although the landowner's home was outside of the pir (more than 1,900 feet from the leak site) the landowner's grandson chose to relocate the landowner to a relative's home. The downstream and the upstream pipeline main line valves were closed at 17:15-hours. Following notification to applicable emergency responders, at 19:22-hours, blow-down of the pipeline valve section began. On october 5, 2019, at 00:05-hour, blow-down of the valve section was complete. Excavation at the hot tap site found the neck of the hot tap fitting contained a crack. The hot tap was cut out of the pipeline and the pipeline was repaired with replacement pipe. Due to changes in business needs, the hot tap connection will not be replaced. The hot tap fitting went through laboratory analysis for cause of the neck fillet weld crack. The january 17, 2020 metallurgical report concludes the hot tap neck fillet weld crack occurred from fatigue. Said report finds fatigue cause was stress and / or vibration from pulsation of the component and insufficient support of a nearby blow off valve assembly. No material deficiencies were found which would have contributed to the component failure. |
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