GTG incident on 2023-10-16 — TX

Operator
Wtg South Permian Midstream Llc
Cause
Corrosion Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities 0 injuries
Property damage (nominal)
$150,000
Incident datetime
2023-10-16 00:00 UTC
Report number
Location
TX
Narrative
On 9/17/2023, at about 20:13, occ observed a pressure drop on the sonora 20' pipeline. Occ operator notified field operations of a possible leak. Field operations began to isolate block valve 2 at 21:00 and block valve 3 at 22:00. Location of the event was not found until 01:30 on 9/18/2023. Due to the release of natural gas a safety perimeter was established until 08:00 when the area was deemed safe to enter. At 08:30, it was discovered that event would trigger an nrc reporting for a release of more than 3mmscf. At 09:23, nrc was notified. Pipe debris was collected, preserved and sent to adv integrity in houston for analysis. To prevent further events, multiple ili runs are taking place to identify any other possible issues and repairs will be made as needed.
Detailed record list
Report Received Date
2023-10-16 00:00:00
Iyear
2023
Report Number
20230095
Supplemental Number
39176
Report Type
Supplemental Final
Operator Id
40362
PHMSA Enforcement
Name
Wtg South Permian Midstream Llc
Operator Street Address
303 Veterans Airpark Lane 5000
Operator City Name
Midland
Operator State Abbreviation
TX
Operator Postal Code
79705
Time Zone
Central
Daylight Savings Ind
No
Location Latitude
31.105645
Google Maps OpenStreetMap
Location Longitude
-101.291835
Google Maps OpenStreetMap
Nrc Rpt Num
1379374
NRC Report How to search
Additional Nrc Report Numbers
1379592
Commodity Released Type
Natural Gas
Unintentional Release
25460
Intentional Release
0
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
Pipeline Was Not Active Due To Maintenance
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
Tx
Onshore Postal Code
76932
Onshore City Name
Not Within A Municipality
Onshore County Name
Reagan County
Designated Location
Not Applicable
Pipe Fac Name
Benedum
Segment Name
Sonora 20 Inch
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
48
Other Underground Facilities
No
Crossing
No
Pipe Facility Type
Intrastate
System Part Involved
Onshore Pipeline, Including Valve Sites
Item Involved
Pipe
Pipe Type
Pipe Seam
Pipe Diameter
20
Pipe Wall Thickness
0.25
Pipe Smys
46000
Pipe Specification
X-46
Pipe Seam Type
Longitudinal Erw - Unknown Frequency
Pipe Manufacturer
Unknown
Pipe Coating Type
Coal Tar
Coating Applied Ind
Yes
Installation Year
Unknown
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Rupture
Rupture Orient
Longitudinal
Rupture Length
240
Rupture Width
20
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
422
Heat Damage Ind
No
Non Heat Damage Ind
No
Did Occur In Mca Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
89110
Est Cost Intentional Release
0
Est Cost Prop Damage
150000
Est Cost Emergency
0
Est Cost Other
225000
Est Cost Other Details
Lab Analysis (35k) And New Ili Tool (190k)
Gas Cost In Mcf
3.5
Prpty
464110
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
752
Gas Flow In Pipe In Mcf
0
Mop Psig
936
Mop Cfr Section
192.619(A)(1)
View CFR 49 §192
Maop Established Date
2015-06-16 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
99935
Internal Inspection Ind
Yes
Operation Complications Ind
No
Pipeline Function
Type C Gathering
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
Yes
Scada Conf Ind
Yes
Accident Identifier
Scada-Based Information (Such As Alarm(S), Alert(S), Event(S), And/or Volume Or Pack Calculations)
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
Line was shut-in for service at nearby station. Investigation shows controller could not have caused this event.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Corrosion Failure
Cause Details
External Corrosion
Internal External
External Corrosion
Visual Exam Results
Other
Visual Exam Details
None Visible
Other Corrosion Ind
Yes
Corrosion Type Details
High Ph Stress Corrosion Cracking
Metallurgical Basis Ind
Yes
Underground Location
Yes
Under Cathodic Protection Ind
Yes
Shielding Evident
Yes
Cathodic Survey Type
Yes
Cp Annual Survey Ind
Yes
Cp Annual Survey Year
2022
Prior Damage
No
Collected Data Ind
No
Has Hydrtst Conduc Before Ind
No
Direct Asmnt Conducted
No
Non Destructive Exam Ind
No
Pwf Env Stress Corrosion Ind
Yes
Preparer Name
J**** B******
Preparer Title
Dot Compliance Specialist
Preparer Email
J*******@w***********.com
Preparer Telephone
4329553703
Authorizer Name
J**** B******
Authorizer Title
Dot Compliance Specialist
Authorizer Telephone
4329553703
Authorizer Email
J*******@w***********.com
Narrative
On 9/17/2023, at about 20:13, occ observed a pressure drop on the sonora 20' pipeline. Occ operator notified field operations of a possible leak. Field operations began to isolate block valve 2 at 21:00 and block valve 3 at 22:00. Location of the event was not found until 01:30 on 9/18/2023. Due to the release of natural gas a safety perimeter was established until 08:00 when the area was deemed safe to enter. At 08:30, it was discovered that event would trigger an nrc reporting for a release of more than 3mmscf. At 09:23, nrc was notified. Pipe debris was collected, preserved and sent to adv integrity in houston for analysis. To prevent further events, multiple ili runs are taking place to identify any other possible issues and repairs will be made as needed.
Report Received Date 2023-10-16 00:00:00
Iyear 2023
Report Number 20230095
Supplemental Number 39176
Report Type Supplemental Final
Operator Id 40362 PHMSA Enforcement
Name Wtg South Permian Midstream Llc
Operator Street Address 303 Veterans Airpark Lane 5000
Operator City Name Midland
Operator State Abbreviation TX
Operator Postal Code 79705
Time Zone Central
Daylight Savings Ind No
Location Latitude 31.105645 Google Maps OpenStreetMap
Location Longitude -101.291835 Google Maps OpenStreetMap
Nrc Rpt Num 1379374 NRC Report How to search
Additional Nrc Report Numbers 1379592
Commodity Released Type Natural Gas
Unintentional Release 25460
Intentional Release 0
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 Pipeline Was Not Active Due To Maintenance
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 Tx
Onshore Postal Code 76932
Onshore City Name Not Within A Municipality
Onshore County Name Reagan County
Designated Location Not Applicable
Pipe Fac Name Benedum
Segment Name Sonora 20 Inch
Federal No
Location Type Pipeline Right-Of-Way
Incident Area Type Underground
Incident Area Subtype Under Soil
Depth Of Cover 48
Other Underground Facilities No
Crossing No
Pipe Facility Type Intrastate
System Part Involved Onshore Pipeline, Including Valve Sites
Item Involved Pipe
Pipe Type Pipe Seam
Pipe Diameter 20
Pipe Wall Thickness 0.25
Pipe Smys 46000
Pipe Specification X-46
Pipe Seam Type Longitudinal Erw - Unknown Frequency
Pipe Manufacturer Unknown
Pipe Coating Type Coal Tar
Coating Applied Ind Yes
Installation Year Unknown
Manufactured Year Unknown
Material Involved Carbon Steel
Release Type Rupture
Rupture Orient Longitudinal
Rupture Length 240
Rupture Width 20
Class Location Type Class 1 Location
Could Be Hca No
Pir Radius 422
Heat Damage Ind No
Non Heat Damage Ind No
Did Occur In Mca Ind No
Est Cost Oper Paid 0
Est Cost Unintentional Release 89110
Est Cost Intentional Release 0
Est Cost Prop Damage 150000
Est Cost Emergency 0
Est Cost Other 225000
Est Cost Other Details Lab Analysis (35k) And New Ili Tool (190k)
Gas Cost In Mcf 3.5
Prpty 464110
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 752
Gas Flow In Pipe In Mcf 0
Mop Psig 936
Mop Cfr Section 192.619(A)(1) View CFR 49 §192
Maop Established Date 2015-06-16 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 99935
Internal Inspection Ind Yes
Operation Complications Ind No
Pipeline Function Type C Gathering
Scada In Place Ind Yes
Scada Operating Ind Yes
Scada Functional Ind Yes
Scada Detection Ind Yes
Scada Conf Ind Yes
Accident Identifier Scada-Based Information (Such As Alarm(S), Alert(S), Event(S), And/or Volume Or Pack Calculations)
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 Line was shut-in for service at nearby station. Investigation shows controller could not have caused this event.
Employee Drug Test Ind No
Contractor Drug Test Ind No
Cause Corrosion Failure
Cause Details External Corrosion
Internal External External Corrosion
Visual Exam Results Other
Visual Exam Details None Visible
Other Corrosion Ind Yes
Corrosion Type Details High Ph Stress Corrosion Cracking
Metallurgical Basis Ind Yes
Underground Location Yes
Under Cathodic Protection Ind Yes
Shielding Evident Yes
Cathodic Survey Type Yes
Cp Annual Survey Ind Yes
Cp Annual Survey Year 2022
Prior Damage No
Collected Data Ind No
Has Hydrtst Conduc Before Ind No
Direct Asmnt Conducted No
Non Destructive Exam Ind No
Pwf Env Stress Corrosion Ind Yes
Preparer Name J**** B******
Preparer Title Dot Compliance Specialist
Preparer Email J*******@w***********.com
Preparer Telephone 4329553703
Authorizer Name J**** B******
Authorizer Title Dot Compliance Specialist
Authorizer Telephone 4329553703
Authorizer Email J*******@w***********.com
Narrative On 9/17/2023, at about 20:13, occ observed a pressure drop on the sonora 20' pipeline. Occ operator notified field operations of a possible leak. Field operations began to isolate block valve 2 at 21:00 and block valve 3 at 22:00. Location of the event was not found until 01:30 on 9/18/2023. Due to the release of natural gas a safety perimeter was established until 08:00 when the area was deemed safe to enter. At 08:30, it was discovered that event would trigger an nrc reporting for a release of more than 3mmscf. At 09:23, nrc was notified. Pipe debris was collected, preserved and sent to adv integrity in houston for analysis. To prevent further events, multiple ili runs are taking place to identify any other possible issues and repairs will be made as needed.
External Resources
Google Maps OpenStreetMap NPMS Public Viewer PHMSA Source Data PHMSA Enforcement NRC Report NTSB CAROL
ClearPHMSA
PHMSA pipeline safety insights.
Product
Features
Services
Company

All rights reserved. Copyright © by ClearPHMSA