Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2020-02-02 — TX
Operator
Great Lakes 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)
$549,327
Incident datetime
2020-02-02 10:12
Report number
Location
TX
Narrative
On february 2, 2020, at 1000 (all times are eastern standard time), a farwell cs technician responded to the sound of an apparent natural gas release within the compressor station yard. At 1012, the technician confirmed the release associated with the 36 inch header inlet to a gas cooler. At 1013, the technician activated an emergency shut down (esd) and the station was isolated from any gas sources with the blow down successfully completed. At 1025 the station was confirmed isolated. At 1106, the incident was reported to the national response center (nrc); report # 1270167. The incident was reported due to anticipated repair costs exceeding the reportable threshold of $50,000. Field investigation indicated the source was due to a failed weld associated with the weld-o-let 2 inch siphon drain line connected to the 36 inch header. The failed siphon drain line was removed and plugged. The 2 inch siphon drain line assembly was sent for metallurgical analysis to determine the cause of the failure. 20200514 update: rcfa received on 1 may 2020; will include final summary after page-turn meeting with mpsc on 21 may 2020. 20200609 update: rcfa was received and results reviewed with the mpsc on 5/21. Additional questions were asked and responses were provided on 6/8. 20200625 update: metallurgical analysis determined the pipe cracked due to reversed bending fatigue, which was a result of thermal lateral, and thermal expansion and contraction of the fixed (in concrete) 2" drain line.
Detailed record list
Report Received Date
2020-03-03 00:00:00
Iyear
2020
Report Number
20200015
Supplemental Number
33953
Report Type
Supplemental Final
Operator Id
6660
Name
Great Lakes Gas Transmission Co
Operator Street Address
700 Louisiana Street Suite 700
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77002
Local Datetime
2020-02-02 10:00:00
Time Zone
Eastern
Daylight Savings Ind
No
Location Latitude
43.940083
Location Longitude
-84.9411467
Nrc Rpt Num
1270167
Nrc Rpt Datetime
2020-02-02 11:06:00
Additional Nrc Report Numbers
1270344
Commodity Released Type
Natural Gas
Unintentional Release
672
Intentional Release
852
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
2020-02-02 10:13:00
Restart Datetime
2020-02-12 11:43:00
Communication State Fed Ind
No
Ignite Ind
No
Num Pub Evacuated
0
Incident Identified Datetime
2020-02-02 10:12:00
On Site Datetime
2020-02-02 10:12:00
On Off Shore
Onshore
Onshore State Abbreviation
Mi
Onshore Postal Code
48633
Onshore City Name
Lake George
Onshore County Name
Clare
Designated Location
Milepost
Designated Name
815.7
Pipe Fac Name
Great Lakes Gas Transmission Company
Segment Name
Cs 12
Federal
No
Location Type
Operator-Controlled Property
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
72
Other Underground Facilities
No
Crossing
No
Pipe Facility Type
Interstate
System Part Involved
Onshore Compressor Station Equipment And Piping
Item Involved
Weld/fusion, Including Heat-Affected Zone
Pipe Diameter
2.375
Pipe Wall Thickness
0.218
Pipe Smys
35000
Pipe Specification
Unknown
Pipe Seam Type
Seamless
Pipe Manufacturer
Us Steel
Pipe Coating Type
Coal Tar
Coating Applied Ind
Yes
Weld Subtype
Pipe Girth Weld
Different Girth Weld Ind
No
Installation Year
1990
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Crack
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
52
Heat Damage Ind
No
Non Heat Damage Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
1680
Est Cost Intentional Release
2130
Est Cost Prop Damage
549327
Est Cost Emergency
0
Est Cost Other
14000
Est Cost Other Details
Metallurgical
Gas Cost In Mcf
2.5
Prpty
567137
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
826
Gas Flow In Pipe In Mcf
0
Mop Psig
974
Mop Cfr Section
192.619(A)(1)
Maop Established Date
1990-06-25 00:00:00
Maop Reversal Flow Ind
No
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Gas Required Odorized 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
Upon review, it was determined controllers' actions did not contribute to the incident.
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
Other
Fatigue Vibr Related Other
Reverse Bending Fatigue Related To Thermal Expansion And Contraction.
Additional Crack Ind
Yes
Post Constr Pressure Test Val
974
Collected Data Ind
No
Has Hydrtst Conduc Before Ind
No
Direct Asmnt Conducted
No
Non Destructive Exam Ind
No
Preparer Name
R****** P******
Preparer Title
Compliance Specialist
Preparer Email
R**************@t*******.com
Preparer Telephone
248-561-7803
Authorizer Name
E*** H*****
Authorizer Title
Senior Manager - Us Regulatory Compliance
Authorizer Telephone
402-490-7253
Authorizer Email
E**********@t*******.com
Narrative
On february 2, 2020, at 1000 (all times are eastern standard time), a farwell cs technician responded to the sound of an apparent natural gas release within the compressor station yard. At 1012, the technician confirmed the release associated with the 36 inch header inlet to a gas cooler. At 1013, the technician activated an emergency shut down (esd) and the station was isolated from any gas sources with the blow down successfully completed. At 1025 the station was confirmed isolated. At 1106, the incident was reported to the national response center (nrc); report # 1270167. The incident was reported due to anticipated repair costs exceeding the reportable threshold of $50,000. Field investigation indicated the source was due to a failed weld associated with the weld-o-let 2 inch siphon drain line connected to the 36 inch header. The failed siphon drain line was removed and plugged. The 2 inch siphon drain line assembly was sent for metallurgical analysis to determine the cause of the failure. 20200514 update: rcfa received on 1 may 2020; will include final summary after page-turn meeting with mpsc on 21 may 2020. 20200609 update: rcfa was received and results reviewed with the mpsc on 5/21. Additional questions were asked and responses were provided on 6/8. 20200625 update: metallurgical analysis determined the pipe cracked due to reversed bending fatigue, which was a result of thermal lateral, and thermal expansion and contraction of the fixed (in concrete) 2" drain line.
| Report Received Date | 2020-03-03 00:00:00 |
|---|---|
| Iyear | 2020 |
| Report Number | 20200015 |
| Supplemental Number | 33953 |
| Report Type | Supplemental Final |
| Operator Id | 6660 PHMSA Enforcement |
| Name | Great Lakes Gas Transmission Co |
| Operator Street Address | 700 Louisiana Street Suite 700 |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77002 |
| Local Datetime | 2020-02-02 10:00:00 |
| Time Zone | Eastern |
| Daylight Savings Ind | No |
| Location Latitude | 43.940083 Google Maps OpenStreetMap |
| Location Longitude | -84.9411467 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1270167 NRC Report How to search |
| Nrc Rpt Datetime | 2020-02-02 11:06:00 |
| Additional Nrc Report Numbers | 1270344 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 672 |
| Intentional Release | 852 |
| 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 | 2020-02-02 10:13:00 |
| Restart Datetime | 2020-02-12 11:43:00 |
| Communication State Fed Ind | No |
| Ignite Ind | No |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2020-02-02 10:12:00 |
| On Site Datetime | 2020-02-02 10:12:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Mi |
| Onshore Postal Code | 48633 |
| Onshore City Name | Lake George |
| Onshore County Name | Clare |
| Designated Location | Milepost |
| Designated Name | 815.7 |
| Pipe Fac Name | Great Lakes Gas Transmission Company |
| Segment Name | Cs 12 |
| Federal | No |
| Location Type | Operator-Controlled Property |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 72 |
| Other Underground Facilities | No |
| Crossing | No |
| Pipe Facility Type | Interstate |
| System Part Involved | Onshore Compressor Station Equipment And Piping |
| Item Involved | Weld/fusion, Including Heat-Affected Zone |
| Pipe Diameter | 2.375 |
| Pipe Wall Thickness | 0.218 |
| Pipe Smys | 35000 |
| Pipe Specification | Unknown |
| Pipe Seam Type | Seamless |
| Pipe Manufacturer | Us Steel |
| Pipe Coating Type | Coal Tar |
| Coating Applied Ind | Yes |
| Weld Subtype | Pipe Girth Weld |
| Different Girth Weld Ind | No |
| Installation Year | 1990 |
| Manufactured Year | Unknown |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Crack |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 52 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 1680 |
| Est Cost Intentional Release | 2130 |
| Est Cost Prop Damage | 549327 |
| Est Cost Emergency | 0 |
| Est Cost Other | 14000 |
| Est Cost Other Details | Metallurgical |
| Gas Cost In Mcf | 2.5 |
| Prpty | 567137 |
| 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 | 826 |
| Gas Flow In Pipe In Mcf | 0 |
| Mop Psig | 974 |
| Mop Cfr Section | 192.619(A)(1) View CFR 49 §192 |
| Maop Established Date | 1990-06-25 00:00:00 |
| Maop Reversal Flow Ind | No |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | No |
| Gas Required Odorized 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 | Upon review, it was determined controllers' actions did not contribute to the incident. |
| 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 | Other |
| Fatigue Vibr Related Other | Reverse Bending Fatigue Related To Thermal Expansion And Contraction. |
| Additional Crack Ind | Yes |
| Post Constr Pressure Test Val | 974 |
| Collected Data Ind | No |
| Has Hydrtst Conduc Before Ind | No |
| Direct Asmnt Conducted | No |
| Non Destructive Exam Ind | No |
| Preparer Name | R****** P****** |
| Preparer Title | Compliance Specialist |
| Preparer Email | R**************@t*******.com |
| Preparer Telephone | 248-561-7803 |
| Authorizer Name | E*** H***** |
| Authorizer Title | Senior Manager - Us Regulatory Compliance |
| Authorizer Telephone | 402-490-7253 |
| Authorizer Email | E**********@t*******.com |
| Narrative | On february 2, 2020, at 1000 (all times are eastern standard time), a farwell cs technician responded to the sound of an apparent natural gas release within the compressor station yard. At 1012, the technician confirmed the release associated with the 36 inch header inlet to a gas cooler. At 1013, the technician activated an emergency shut down (esd) and the station was isolated from any gas sources with the blow down successfully completed. At 1025 the station was confirmed isolated. At 1106, the incident was reported to the national response center (nrc); report # 1270167. The incident was reported due to anticipated repair costs exceeding the reportable threshold of $50,000. Field investigation indicated the source was due to a failed weld associated with the weld-o-let 2 inch siphon drain line connected to the 36 inch header. The failed siphon drain line was removed and plugged. The 2 inch siphon drain line assembly was sent for metallurgical analysis to determine the cause of the failure. 20200514 update: rcfa received on 1 may 2020; will include final summary after page-turn meeting with mpsc on 21 may 2020. 20200609 update: rcfa was received and results reviewed with the mpsc on 5/21. Additional questions were asked and responses were provided on 6/8. 20200625 update: metallurgical analysis determined the pipe cracked due to reversed bending fatigue, which was a result of thermal lateral, and thermal expansion and contraction of the fixed (in concrete) 2" drain line. |
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