Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2020-08-06 — TX
Operator
Gulf South Pipeline Company, Llc
Cause
Corrosion Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$285,000
Incident datetime
2020-08-06 13:15
Report number
Location
TX
Narrative
On august 6, 2020, a centerpoint energy employee reported a possible natural gas leak on gulf south pipeline's mccomb 6-inch (index 302) line in terry, ms. Gulf south operations employees were dispatched to investigate and determined a minor leak of unknown cause. The pressure on the pipeline was reduced by 20% until repairs could be made. Preparations were made to install a weld over but, upon excavation, it was determined that this would not be a feasible approach. At this point, this became a reportable incident. The line was taken out of service on august 13, 2020 at 07:00 for repairs. Initially, the cause was suspected to be a leaking dresser coupling but the cause was determined to be external corrosion. Approximately 250 feet of pipe was replaced and the line returned to service on august 15, 2020 at 16:00. On part g, question 4a of this report, the response to the year that cathodic protection on this pipeline started is speculation based on employee historical knowledge; the exact year is unknown. 9-8-2020 supplemental report submitted to correct responses to questions b4 and c6 as directed by PHMSA and correct response to question a20c.
Detailed record list
Report Received Date
2020-09-03 00:00:00
Iyear
2020
Report Number
20200090
Supplemental Number
34245
Report Type
Supplemental Final
Operator Id
31728
Name
Gulf South Pipeline Company, Llc
Operator Street Address
9 Greenway Plaza Suite 2800
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77046
Local Datetime
2020-08-13 10:00:00
Time Zone
Central
Daylight Savings Ind
Yes
Location Latitude
32.117629
Location Longitude
-90.301185
Nrc Rpt Num
1285170
Nrc Rpt Datetime
2020-08-21 11:23:00
Additional Nrc Report Numbers
1285174
Commodity Released Type
Natural Gas
Unintentional Release
66
Intentional Release
48
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
2020-08-13 07:00:00
Restart Datetime
2020-08-15 16:00:00
Communication State Fed Ind
No
Ignite Ind
No
Upstream Action Taken
Valve Closure
Upstream Valve Close Datetime
2020-08-06 16:30:00
Downstream Action Taken
Operational Control
Downstream Oprtnl Cntrl Detail
Reduced Pressure Control Set Point For Index 302 By 20% From 390 Psig To 310 Psig
Num Pub Evacuated
0
Incident Identified Datetime
2020-08-06 13:15:00
On Site Datetime
2020-08-06 13:45:00
On Off Shore
Onshore
Onshore State Abbreviation
Ms
Onshore Postal Code
39170
Onshore City Name
Not Within A Municipality
Onshore County Name
Hinds
Designated Location
Survey Station No.
Designated Name
744+07
Pipe Fac Name
Index 302
Segment Name
Mccomb 6-Inch 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
Pipe
Pipe Type
Pipe Body
Pipe Diameter
6
Puddle Weld Ind
No
Pipe Wall Thickness
0.28
Pipe Smys
24000
Pipe Specification
Api 5l
Pipe Seam Type
Lap Welded
Pipe Manufacturer
Unknown
Pipe Coating Type
Coal Tar
Coating Applied Ind
Unknown
Installation Year
1931
Manufactured Year
1931
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Pinhole
Class Location Type
Class 2 Location
Could Be Hca
No
Pir Radius
104
Heat Damage Ind
No
Non Heat Damage Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
122
Est Cost Intentional Release
89
Est Cost Prop Damage
285000
Est Cost Emergency
0
Est Cost Other
0
Gas Cost In Mcf
1.85
Prpty
285211
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
390
Gas Flow In Pipe In Mcf
6000
Mop Psig
447
Mop Cfr Section
192.619(A)(1)
Maop Established Date
2018-04-05 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
Length Segment Isolated
15048
Internal Inspection Ind
No
Unsuitable Mainline Ind
Yes
Tight Mitered 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
Other
Accident Details
Notification From A Centerpoint Energy Employee
Investigation Status
Yes, specify investigation result(s): (select all that apply)
Invest No Controller Ind
Yes
Invest Incorrect Action Ind
Yes
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Corrosion Failure
Cause Details
External Corrosion
Internal External
External Corrosion
Visual Exam Results
Localized Pitting
Galvanic Corrosion Ind
Yes
Field Exam Basis Ind
Yes
Other Basis Ind
Yes
Corrosion Basis Details
Photos Reviewed By Corrosion Department For Confirmation
Underground Location
Yes
Under Cathodic Protection Ind
Yes
Cathodic Pro Start Year
1960
Shielding Evident
No
Cathodic Survey Type
Yes
Close Interval Survey Ind
Yes
Close Interval Survey Year
2014
Prior Damage
Yes
Collected Data Ind
No
Has Hydrtst Conduc Before Ind
No
Direct Asmnt Conducted
No
Non Destructive Exam Ind
No
Preparer Name
S****** M********
Preparer Title
Pa Oq And Event Program Leader
Preparer Email
S****************@b**********.com
Preparer Telephone
2709035764
Authorizer Name
T*** B****
Authorizer Title
Manager Compliance Services
Authorizer Telephone
2703146547
Authorizer Email
T*********@b**********.com
Narrative
On august 6, 2020, a centerpoint energy employee reported a possible natural gas leak on gulf south pipeline's mccomb 6-inch (index 302) line in terry, ms. Gulf south operations employees were dispatched to investigate and determined a minor leak of unknown cause. The pressure on the pipeline was reduced by 20% until repairs could be made. Preparations were made to install a weld over but, upon excavation, it was determined that this would not be a feasible approach. At this point, this became a reportable incident. The line was taken out of service on august 13, 2020 at 07:00 for repairs. Initially, the cause was suspected to be a leaking dresser coupling but the cause was determined to be external corrosion. Approximately 250 feet of pipe was replaced and the line returned to service on august 15, 2020 at 16:00. On part g, question 4a of this report, the response to the year that cathodic protection on this pipeline started is speculation based on employee historical knowledge; the exact year is unknown. 9-8-2020 supplemental report submitted to correct responses to questions b4 and c6 as directed by PHMSA and correct response to question a20c.
| Report Received Date | 2020-09-03 00:00:00 |
|---|---|
| Iyear | 2020 |
| Report Number | 20200090 |
| Supplemental Number | 34245 |
| Report Type | Supplemental Final |
| Operator Id | 31728 PHMSA Enforcement |
| Name | Gulf South Pipeline Company, Llc |
| Operator Street Address | 9 Greenway Plaza Suite 2800 |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77046 |
| Local Datetime | 2020-08-13 10:00:00 |
| Time Zone | Central |
| Daylight Savings Ind | Yes |
| Location Latitude | 32.117629 Google Maps OpenStreetMap |
| Location Longitude | -90.301185 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1285170 NRC Report How to search |
| Nrc Rpt Datetime | 2020-08-21 11:23:00 |
| Additional Nrc Report Numbers | 1285174 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 66 |
| Intentional Release | 48 |
| 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 | 2020-08-13 07:00:00 |
| Restart Datetime | 2020-08-15 16:00:00 |
| Communication State Fed Ind | No |
| Ignite Ind | No |
| Upstream Action Taken | Valve Closure |
| Upstream Valve Close Datetime | 2020-08-06 16:30:00 |
| Downstream Action Taken | Operational Control |
| Downstream Oprtnl Cntrl Detail | Reduced Pressure Control Set Point For Index 302 By 20% From 390 Psig To 310 Psig |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2020-08-06 13:15:00 |
| On Site Datetime | 2020-08-06 13:45:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Ms |
| Onshore Postal Code | 39170 |
| Onshore City Name | Not Within A Municipality |
| Onshore County Name | Hinds |
| Designated Location | Survey Station No. |
| Designated Name | 744+07 |
| Pipe Fac Name | Index 302 |
| Segment Name | Mccomb 6-Inch 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 | Pipe |
| Pipe Type | Pipe Body |
| Pipe Diameter | 6 |
| Puddle Weld Ind | No |
| Pipe Wall Thickness | 0.28 |
| Pipe Smys | 24000 |
| Pipe Specification | Api 5l |
| Pipe Seam Type | Lap Welded |
| Pipe Manufacturer | Unknown |
| Pipe Coating Type | Coal Tar |
| Coating Applied Ind | Unknown |
| Installation Year | 1931 |
| Manufactured Year | 1931 |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Pinhole |
| Class Location Type | Class 2 Location |
| Could Be Hca | No |
| Pir Radius | 104 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 122 |
| Est Cost Intentional Release | 89 |
| Est Cost Prop Damage | 285000 |
| Est Cost Emergency | 0 |
| Est Cost Other | 0 |
| Gas Cost In Mcf | 1.85 |
| Prpty | 285211 |
| 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 | 390 |
| Gas Flow In Pipe In Mcf | 6000 |
| Mop Psig | 447 |
| Mop Cfr Section | 192.619(A)(1) View CFR 49 §192 |
| Maop Established Date | 2018-04-05 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 |
| Length Segment Isolated | 15048 |
| Internal Inspection Ind | No |
| Unsuitable Mainline Ind | Yes |
| Tight Mitered 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 | Other |
| Accident Details | Notification From A Centerpoint Energy Employee |
| Investigation Status | Yes, specify investigation result(s): (select all that apply) |
| Invest No Controller Ind | Yes |
| Invest Incorrect Action Ind | Yes |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Corrosion Failure |
| Cause Details | External Corrosion |
| Internal External | External Corrosion |
| Visual Exam Results | Localized Pitting |
| Galvanic Corrosion Ind | Yes |
| Field Exam Basis Ind | Yes |
| Other Basis Ind | Yes |
| Corrosion Basis Details | Photos Reviewed By Corrosion Department For Confirmation |
| Underground Location | Yes |
| Under Cathodic Protection Ind | Yes |
| Cathodic Pro Start Year | 1960 |
| Shielding Evident | No |
| Cathodic Survey Type | Yes |
| Close Interval Survey Ind | Yes |
| Close Interval Survey Year | 2014 |
| Prior Damage | Yes |
| Collected Data Ind | No |
| Has Hydrtst Conduc Before Ind | No |
| Direct Asmnt Conducted | No |
| Non Destructive Exam Ind | No |
| Preparer Name | S****** M******** |
| Preparer Title | Pa Oq And Event Program Leader |
| Preparer Email | S****************@b**********.com |
| Preparer Telephone | 2709035764 |
| Authorizer Name | T*** B**** |
| Authorizer Title | Manager Compliance Services |
| Authorizer Telephone | 2703146547 |
| Authorizer Email | T*********@b**********.com |
| Narrative | On august 6, 2020, a centerpoint energy employee reported a possible natural gas leak on gulf south pipeline's mccomb 6-inch (index 302) line in terry, ms. Gulf south operations employees were dispatched to investigate and determined a minor leak of unknown cause. The pressure on the pipeline was reduced by 20% until repairs could be made. Preparations were made to install a weld over but, upon excavation, it was determined that this would not be a feasible approach. At this point, this became a reportable incident. The line was taken out of service on august 13, 2020 at 07:00 for repairs. Initially, the cause was suspected to be a leaking dresser coupling but the cause was determined to be external corrosion. Approximately 250 feet of pipe was replaced and the line returned to service on august 15, 2020 at 16:00. On part g, question 4a of this report, the response to the year that cathodic protection on this pipeline started is speculation based on employee historical knowledge; the exact year is unknown. 9-8-2020 supplemental report submitted to correct responses to questions b4 and c6 as directed by PHMSA and correct response to question a20c. |
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