Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2018-10-14 — TX
Operator
Enable Midstream Partners, Lp
Cause
Corrosion Failure
Commodity
Hvl Or Other Flammable Or Toxic Fluid Which Is A Gas At Ambient Conditions
Program
HL
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$48,200
Incident datetime
2018-10-14 15:49
Report number
Location
TX
Narrative
On 10-14-18 a leak was found by a land owner in harrison county, texas. The landowner immediately notified enable gas transmission system control. An o&m technician was dispatched to verify if the leak and it was confirmed that line aj-3 was leaking. The responding employees then contacted gas control and the harrison co sheriff's office. The line was taken out of service and a repair was made. During the release, the liquid ethane immediately vaporized when exposed to air resulting in a large ice crater at the leak site. Field examination of the line showed localized pitting with a pinhole in the pipeline. The defect was removed and sent for analysis. The results of the analysis have not been completed and a supplemental report will be submitted when the analysis is received. The incident was reported to the nrc on 10/14/2018 at 19:29 cst (nrc #1227477) and the 48 hour follow up (1227588) was provided on 10/16/2018 09:15. Enable received the metallurgical report from the lab. The lab confirmed the cause of the pinhole was stray current corrosion, but could not identify specifically ac or dc. Enable field investigations and measurements lead US to believe that it was stray ac current. Supplemental 3/20/2019 part h narrative
Detailed record list
Report Received Date
2018-11-01 00:00:00
Iyear
2018
Report Number
20180334
Supplemental Number
31820
Report Type
Supplemental Final
Operator Id
31202
Name
Enable Midstream Partners, Lp
Operator Street Address
1300 Main Street
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77002
Local Datetime
2018-10-14 14:30:00
Location Latitude
32.42684
Location Longitude
-94.561733
Commodity Released Type
Hvl Or Other Flammable Or Toxic Fluid Which Is A Gas At Ambient Conditions
Commodity Subtype
Other Hvl
Commodity Details
Ethane
Unintentional Release Bbls
1
Intentional Release Bbls
832
Recovered Bbls
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Notification From Public
Incident Identified Datetime
2018-10-14 15:49:00
System Part Involved
Onshore Pipeline, Including Valve Sites
On Off Shore
Onshore
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2018-10-14 17:00:00
Restart Datetime
2018-10-15 19:30:00
On Site Datetime
2018-10-14 15:49:00
Nrc Rpt Datetime
2018-10-14 19:36:00
Nrc Rpt Num
1227477
Ignite Ind
No
Explode Ind
No
Upstream Valve Type Ind
Manual
Downstream Valve Type Ind
Manual
Num Pub Evacuated
0
Pipe Fac Name
Line Aj-3
Segment Name
Line Aj-3
Onshore State Abbreviation
Tx
Onshore Postal Code
75602
Onshore City Name
Not Within A Municipality
Onshore County Name
Harrison
Designated Location
Survey Station No.
Designated Name
470+30
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
36
Crossing
No
Pipe Facility Type
Intrastate
Item Involved
Pipe
Pipe Type
Pipe Body
Pipe Diameter
4
Pipe Wall Thickness
0.188
Pipe Smys
52000
Pipe Specification
Api-5l
Pipe Seam Type
Erw � Unknown Frequency
Pipe Manufacturer
Tex-Tube
Pipe Coating Type
Fusion Bonded Epoxy(Fbe)
Installation Year
1997
Manufactured Year
1997
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Pinhole
Wildlife Impact Ind
No
Soil Contamination
No
Long Term Assessment
No
Remediation Ind
No
Water Contam Ind
No
Could Be Hca
No
Commodity Reached Hca
No
Est Cost Oper Paid
6000
Est Cost Gas Released
12230
Est Cost Prop Damage
48200
Est Cost Emergency
5000
Est Cost Environmental
0
Est Cost Other
0
Prpty
71430
Accident Psig
1055
Mop Psig
1480
Accident Pressure
Pressure Did Not Exceed Mop
Pressure Restriction Ind
No
Length Segment Isolated
26192
Internal Inspection Ind
Yes
Operation Complications Ind
No
Pipeline Function
> 20% Smys Regulated Transmission
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
No
Scada Conf Ind
No
Cpm In Place Ind
Yes
Cpm Operating Ind
Yes
Cpm Functional Ind
Yes
Cpm Detection Ind
No
Cpm Conf Ind
No
Investigation Status
Yes, specify investigation result(s): (select all that apply)
Invest No Control Room 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
Stray Current Corrosion Ind
Yes
Field Exam Basis Ind
Yes
Underground Location
Yes
Under Cathodic Protection Ind
Yes
Cathodic Pro Start Year
Unknown
Shielding Evident
Yes
Cathodic Survey Type
Yes
Cp Annual Survey Ind
Yes
Close Interval Survey Ind
Yes
Other Cp Survey Ind
Yes
Cp Annual Survey Year
2018
Close Interval Survey Year
2018
Other Cp Survey Year
2018
Prior Damage
Yes
Collected Data Ind
No
Has Hydrtst Conduc Before Ind
Yes
Hydrtst Most Rcnt Year
2014
Hydrtst Most Rcnt Pressure
2110
Direct Asmnt Conducted
No
Non Destructive Exam Ind
No
Preparer Name
C**** R******
Preparer Title
Lead Dot Compliance Program Manager
Preparer Email
C************@e**************.com
Preparer Telephone
405 558 4647
Prepared Date
2019-03-20 00:00:00
Authorizer Name
C**** R******
Authorizer Telephone
405 558 4647
Authorizer Title
Lead Dot Compliance Program Manager
Authorizer Email
C************@e**************.com
Narrative
On 10-14-18 a leak was found by a land owner in harrison county, texas. The landowner immediately notified enable gas transmission system control. An o&m technician was dispatched to verify if the leak and it was confirmed that line aj-3 was leaking. The responding employees then contacted gas control and the harrison co sheriff's office. The line was taken out of service and a repair was made. During the release, the liquid ethane immediately vaporized when exposed to air resulting in a large ice crater at the leak site. Field examination of the line showed localized pitting with a pinhole in the pipeline. The defect was removed and sent for analysis. The results of the analysis have not been completed and a supplemental report will be submitted when the analysis is received. The incident was reported to the nrc on 10/14/2018 at 19:29 cst (nrc #1227477) and the 48 hour follow up (1227588) was provided on 10/16/2018 09:15. Enable received the metallurgical report from the lab. The lab confirmed the cause of the pinhole was stray current corrosion, but could not identify specifically ac or dc. Enable field investigations and measurements lead US to believe that it was stray ac current. Supplemental 3/20/2019 part h narrative
| Report Received Date | 2018-11-01 00:00:00 |
|---|---|
| Iyear | 2018 |
| Report Number | 20180334 |
| Supplemental Number | 31820 |
| Report Type | Supplemental Final |
| Operator Id | 31202 PHMSA Enforcement |
| Name | Enable Midstream Partners, Lp |
| Operator Street Address | 1300 Main Street |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77002 |
| Local Datetime | 2018-10-14 14:30:00 |
| Location Latitude | 32.42684 Google Maps OpenStreetMap |
| Location Longitude | -94.561733 Google Maps OpenStreetMap |
| Commodity Released Type | Hvl Or Other Flammable Or Toxic Fluid Which Is A Gas At Ambient Conditions |
| Commodity Subtype | Other Hvl |
| Commodity Details | Ethane |
| Unintentional Release Bbls | 1 |
| Intentional Release Bbls | 832 |
| Recovered Bbls | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Notification From Public |
| Incident Identified Datetime | 2018-10-14 15:49:00 |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| On Off Shore | Onshore |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2018-10-14 17:00:00 |
| Restart Datetime | 2018-10-15 19:30:00 |
| On Site Datetime | 2018-10-14 15:49:00 |
| Nrc Rpt Datetime | 2018-10-14 19:36:00 |
| Nrc Rpt Num | 1227477 NRC Report How to search |
| Ignite Ind | No |
| Explode Ind | No |
| Upstream Valve Type Ind | Manual |
| Downstream Valve Type Ind | Manual |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Line Aj-3 |
| Segment Name | Line Aj-3 |
| Onshore State Abbreviation | Tx |
| Onshore Postal Code | 75602 |
| Onshore City Name | Not Within A Municipality |
| Onshore County Name | Harrison |
| Designated Location | Survey Station No. |
| Designated Name | 470+30 |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 36 |
| Crossing | No |
| Pipe Facility Type | Intrastate |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Pipe Diameter | 4 |
| Pipe Wall Thickness | 0.188 |
| Pipe Smys | 52000 |
| Pipe Specification | Api-5l |
| Pipe Seam Type | Erw � Unknown Frequency |
| Pipe Manufacturer | Tex-Tube |
| Pipe Coating Type | Fusion Bonded Epoxy(Fbe) |
| Installation Year | 1997 |
| Manufactured Year | 1997 |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Pinhole |
| Wildlife Impact Ind | No |
| Soil Contamination | No |
| Long Term Assessment | No |
| Remediation Ind | No |
| Water Contam Ind | No |
| Could Be Hca | No |
| Commodity Reached Hca | No |
| Est Cost Oper Paid | 6000 |
| Est Cost Gas Released | 12230 |
| Est Cost Prop Damage | 48200 |
| Est Cost Emergency | 5000 |
| Est Cost Environmental | 0 |
| Est Cost Other | 0 |
| Prpty | 71430 |
| Accident Psig | 1055 |
| Mop Psig | 1480 |
| Accident Pressure | Pressure Did Not Exceed Mop |
| Pressure Restriction Ind | No |
| Length Segment Isolated | 26192 |
| Internal Inspection Ind | Yes |
| Operation Complications Ind | No |
| Pipeline Function | > 20% Smys Regulated Transmission |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | No |
| Scada Conf Ind | No |
| Cpm In Place Ind | Yes |
| Cpm Operating Ind | Yes |
| Cpm Functional Ind | Yes |
| Cpm Detection Ind | No |
| Cpm Conf Ind | No |
| Investigation Status | Yes, specify investigation result(s): (select all that apply) |
| Invest No Control Room 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 |
| Stray Current Corrosion Ind | Yes |
| Field Exam Basis Ind | Yes |
| Underground Location | Yes |
| Under Cathodic Protection Ind | Yes |
| Cathodic Pro Start Year | Unknown |
| Shielding Evident | Yes |
| Cathodic Survey Type | Yes |
| Cp Annual Survey Ind | Yes |
| Close Interval Survey Ind | Yes |
| Other Cp Survey Ind | Yes |
| Cp Annual Survey Year | 2018 |
| Close Interval Survey Year | 2018 |
| Other Cp Survey Year | 2018 |
| Prior Damage | Yes |
| Collected Data Ind | No |
| Has Hydrtst Conduc Before Ind | Yes |
| Hydrtst Most Rcnt Year | 2014 |
| Hydrtst Most Rcnt Pressure | 2110 |
| Direct Asmnt Conducted | No |
| Non Destructive Exam Ind | No |
| Preparer Name | C**** R****** |
| Preparer Title | Lead Dot Compliance Program Manager |
| Preparer Email | C************@e**************.com |
| Preparer Telephone | 405 558 4647 |
| Prepared Date | 2019-03-20 00:00:00 |
| Authorizer Name | C**** R****** |
| Authorizer Telephone | 405 558 4647 |
| Authorizer Title | Lead Dot Compliance Program Manager |
| Authorizer Email | C************@e**************.com |
| Narrative | On 10-14-18 a leak was found by a land owner in harrison county, texas. The landowner immediately notified enable gas transmission system control. An o&m technician was dispatched to verify if the leak and it was confirmed that line aj-3 was leaking. The responding employees then contacted gas control and the harrison co sheriff's office. The line was taken out of service and a repair was made. During the release, the liquid ethane immediately vaporized when exposed to air resulting in a large ice crater at the leak site. Field examination of the line showed localized pitting with a pinhole in the pipeline. The defect was removed and sent for analysis. The results of the analysis have not been completed and a supplemental report will be submitted when the analysis is received. The incident was reported to the nrc on 10/14/2018 at 19:29 cst (nrc #1227477) and the 48 hour follow up (1227588) was provided on 10/16/2018 09:15. Enable received the metallurgical report from the lab. The lab confirmed the cause of the pinhole was stray current corrosion, but could not identify specifically ac or dc. Enable field investigations and measurements lead US to believe that it was stray ac current. Supplemental 3/20/2019 part h narrative |
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