Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2019-11-06 — TX
Operator
Energy Transfer Company
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)
$420,000
Incident datetime
2019-11-06 21:15
Report number
Location
TX
Narrative
On 11/3/19 measurement personnel noted inconsistencies in volume calculations on the tx-107 viola 8 inch butane pipeline. Measurement personnel began inspecting and testing measurement equipment to determine if inconsistencies noted in volume were due to equipment errors or other malfunction. On 11/6/19 at 21:15 the leak detection system alarmed on the tx-107 viola 8 inch. The control center notified operations and measurement personnel. A crew was dispatched to patrol the row and search for indications of a release however due to heavy rains and flooding the search could not be fully completed that same day. After conditions improved the patrol was resumed on 11/7/19 and at approximately 14:00 the crew identified indications of a release, contacted the control center and the line was shut down immediately. Upstream and downstream block valves were closed to isolate the release. Based upon visible surface conditions and prior to excavation an initial estimate of 10 bbls of unintentionally released product was made. On 11/7/19 the nrc was contacted at 14:29 and report no. 1263380 was issued. The tx rrc was contacted at 14:52 and incident no. 2089 was assigned. The required follow up nrc report was filed on 11/8/19 at 13:42 and report no. 1263465 was issued. Due to extremely wet surface conditions excavation equipment was not able to be fully moved in until 11/8/19. Excavation progress was slowed further by presence of other pipelines in the same row and practices to ensure the product (butane) did not flash. Due to the slow pace of excavation the pipe was not exposed until 11/9/19. Based on observations once the area was fully excavated and the pipe exposed it was determined that the release was larger than initially estimated. The product formed an ice ball and the dimensions of that allowed a revised calculation of the release to be made. Approximately 2618 bbls was calculated to have been released unintentionally. Upon examination in the field multiple external corrosion pinholes were identified. Permanent repair was made by a replacement of approximately 184 feet of new pipe and the pipeline was restarted on 11/21/19. A def/mfl ili tool was run on the tx-107 viola 8 inch on 10/8/19. The vendor report had not yet been received when the release occurred. The vendor final report was received on 12/18/19 and indicated a high percentage metal loss anomaly at the release location. Other metal loss tool calls on the failed and cut out section of pipe were measured and used to validate the tool data. No other metal loss calls requiring timed repairs were discovered in this area. Prior ili data sets are also being reviewed and based on results the reassessment interval will be confirmed or adjusted. Via field testing and surveys, it was determined that the cathodic protection system in this area is subject to stray current interference. To mitigate the condition six (6) new impressed current cathodic protection systems are currently being installed. Once installation is complete the line will be allowed to fully polarize and a cycled cis will be conducted. Following this survey a depolarized cis survey will be conducted to ensure adequate and compliant levels of cathodic protection are in place. Based on survey results adequate cathodic will be confirmed or additional remedial measures identified and implemented.
Detailed record list
Report Received Date
2019-12-06 00:00:00
Iyear
2019
Report Number
20190368
Supplemental Number
33578
Report Type
Supplemental Final
Operator Id
32099
Name
Energy Transfer Company
Operator Street Address
1300 Main Street
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77002
Local Datetime
2019-11-06 21:15:00
Location Latitude
27.793366
Location Longitude
-97.554355
Commodity Released Type
Hvl Or Other Flammable Or Toxic Fluid Which Is A Gas At Ambient Conditions
Commodity Subtype
Other Hvl
Commodity Details
Butane
Unintentional Release Bbls
2618
Intentional Release Bbls
0
Recovered Bbls
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Cpm Leak Detection System Or Scada-Based Information (Such As Alarm(S), Alert(S), Event(S), And/or Volume Calculations)
Incident Identified Datetime
2019-11-06 21:15:00
System Part Involved
Onshore Pipeline, Including Valve Sites
On Off Shore
Onshore
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2019-11-07 14:00:00
Restart Datetime
2019-11-21 12:00:00
On Site Datetime
2019-11-07 14:00:00
Nrc Rpt Datetime
2019-11-07 14:29:00
Nrc Rpt Num
1263380
Ignite Ind
No
Explode Ind
No
Upstream Valve Type Ind
Manual
Downstream Valve Type Ind
Remotely Controlled
Num Pub Evacuated
0
Pipe Fac Name
Tx-107 Viola 8 Inch
Segment Name
Tx-107 Midpoint Jct To Viola
Onshore State Abbreviation
Tx
Onshore Postal Code
78410
Onshore City Name
Corpus Christi
Onshore County Name
Nueces
Designated Location
Milepost/valve Station
Designated Name
2053+38
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
24
Crossing
No
Pipe Facility Type
Intrastate
Item Involved
Pipe
Pipe Type
Pipe Body
Pipe Diameter
8
Pipe Wall Thickness
0.203
Pipe Smys
42000
Pipe Specification
Api 5l
Pipe Seam Type
Erw - Low Frequency
Pipe Manufacturer
Unknown
Pipe Coating Type
Coal Tar
Installation Year
1959
Manufactured Year
1959
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Pinhole
Wildlife Impact Ind
No
Soil Contamination
Yes
Long Term Assessment
No
Remediation Ind
Yes
Soil Remed Ind
Yes
Water Contam Ind
No
Could Be Hca
No
Commodity Reached Hca
No
Est Cost Oper Paid
15000
Est Cost Gas Released
74770
Est Cost Prop Damage
420000
Est Cost Emergency
5000
Est Cost Environmental
60000
Est Cost Other
0
Prpty
574770
Accident Psig
250
Mop Psig
650
Accident Pressure
Pressure Did Not Exceed Mop
Pressure Restriction Ind
No
Length Segment Isolated
46200
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
Yes
Scada Conf Ind
Yes
Cpm In Place Ind
Yes
Cpm Operating Ind
Yes
Cpm Functional Ind
Yes
Cpm Detection Ind
Yes
Cpm Conf Ind
Yes
Investigation Status
Yes, specify investigation result(s): (select all that apply)
Invest No Schedule Ind
Yes
Invest No Schedule Ind Details
Investigation Identified No Controller Issues. Controller Actions Were Consistent With Company Protocols
Invest No Control Room Ind
Yes
Invest No Controller 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
1959
Shielding Evident
No
Cathodic Survey Type
Yes
Cp Annual Survey Ind
Yes
Close Interval Survey Ind
Yes
Cp Annual Survey Year
2019
Close Interval Survey Year
2019
Prior Damage
No
Collected Data Ind
Yes
Axial Magnetic Flx Lkg Ind
Yes
Geometry Deformation Ind
Yes
Axial Recent Year
2019
Geometry Recent Year
2019
Has Hydrtst Conduc Before Ind
No
Direct Asmnt Conducted
No
Non Destructive Exam Ind
No
Preparer Name
C********** P******
Preparer Title
Regulatory Compliance Specialist
Preparer Email
C******************@e*************.com
Preparer Telephone
713-989-4464
Prepared Date
2020-04-09 00:00:00
Authorizer Name
C**** K*****
Authorizer Telephone
713-989-7077
Authorizer Title
Manager-Intrastate Regulatory Compliance
Authorizer Email
C***********@e*************.com
Narrative
On 11/3/19 measurement personnel noted inconsistencies in volume calculations on the tx-107 viola 8 inch butane pipeline. Measurement personnel began inspecting and testing measurement equipment to determine if inconsistencies noted in volume were due to equipment errors or other malfunction. On 11/6/19 at 21:15 the leak detection system alarmed on the tx-107 viola 8 inch. The control center notified operations and measurement personnel. A crew was dispatched to patrol the row and search for indications of a release however due to heavy rains and flooding the search could not be fully completed that same day. After conditions improved the patrol was resumed on 11/7/19 and at approximately 14:00 the crew identified indications of a release, contacted the control center and the line was shut down immediately. Upstream and downstream block valves were closed to isolate the release. Based upon visible surface conditions and prior to excavation an initial estimate of 10 bbls of unintentionally released product was made. On 11/7/19 the nrc was contacted at 14:29 and report no. 1263380 was issued. The tx rrc was contacted at 14:52 and incident no. 2089 was assigned. The required follow up nrc report was filed on 11/8/19 at 13:42 and report no. 1263465 was issued. Due to extremely wet surface conditions excavation equipment was not able to be fully moved in until 11/8/19. Excavation progress was slowed further by presence of other pipelines in the same row and practices to ensure the product (butane) did not flash. Due to the slow pace of excavation the pipe was not exposed until 11/9/19. Based on observations once the area was fully excavated and the pipe exposed it was determined that the release was larger than initially estimated. The product formed an ice ball and the dimensions of that allowed a revised calculation of the release to be made. Approximately 2618 bbls was calculated to have been released unintentionally. Upon examination in the field multiple external corrosion pinholes were identified. Permanent repair was made by a replacement of approximately 184 feet of new pipe and the pipeline was restarted on 11/21/19. A def/mfl ili tool was run on the tx-107 viola 8 inch on 10/8/19. The vendor report had not yet been received when the release occurred. The vendor final report was received on 12/18/19 and indicated a high percentage metal loss anomaly at the release location. Other metal loss tool calls on the failed and cut out section of pipe were measured and used to validate the tool data. No other metal loss calls requiring timed repairs were discovered in this area. Prior ili data sets are also being reviewed and based on results the reassessment interval will be confirmed or adjusted. Via field testing and surveys, it was determined that the cathodic protection system in this area is subject to stray current interference. To mitigate the condition six (6) new impressed current cathodic protection systems are currently being installed. Once installation is complete the line will be allowed to fully polarize and a cycled cis will be conducted. Following this survey a depolarized cis survey will be conducted to ensure adequate and compliant levels of cathodic protection are in place. Based on survey results adequate cathodic will be confirmed or additional remedial measures identified and implemented.
| Report Received Date | 2019-12-06 00:00:00 |
|---|---|
| Iyear | 2019 |
| Report Number | 20190368 |
| Supplemental Number | 33578 |
| Report Type | Supplemental Final |
| Operator Id | 32099 PHMSA Enforcement |
| Name | Energy Transfer Company |
| Operator Street Address | 1300 Main Street |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77002 |
| Local Datetime | 2019-11-06 21:15:00 |
| Location Latitude | 27.793366 Google Maps OpenStreetMap |
| Location Longitude | -97.554355 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 | Butane |
| Unintentional Release Bbls | 2618 |
| Intentional Release Bbls | 0 |
| Recovered Bbls | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Cpm Leak Detection System Or Scada-Based Information (Such As Alarm(S), Alert(S), Event(S), And/or Volume Calculations) |
| Incident Identified Datetime | 2019-11-06 21:15:00 |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| On Off Shore | Onshore |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2019-11-07 14:00:00 |
| Restart Datetime | 2019-11-21 12:00:00 |
| On Site Datetime | 2019-11-07 14:00:00 |
| Nrc Rpt Datetime | 2019-11-07 14:29:00 |
| Nrc Rpt Num | 1263380 NRC Report How to search |
| Ignite Ind | No |
| Explode Ind | No |
| Upstream Valve Type Ind | Manual |
| Downstream Valve Type Ind | Remotely Controlled |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Tx-107 Viola 8 Inch |
| Segment Name | Tx-107 Midpoint Jct To Viola |
| Onshore State Abbreviation | Tx |
| Onshore Postal Code | 78410 |
| Onshore City Name | Corpus Christi |
| Onshore County Name | Nueces |
| Designated Location | Milepost/valve Station |
| Designated Name | 2053+38 |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 24 |
| Crossing | No |
| Pipe Facility Type | Intrastate |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Pipe Diameter | 8 |
| Pipe Wall Thickness | 0.203 |
| Pipe Smys | 42000 |
| Pipe Specification | Api 5l |
| Pipe Seam Type | Erw - Low Frequency |
| Pipe Manufacturer | Unknown |
| Pipe Coating Type | Coal Tar |
| Installation Year | 1959 |
| Manufactured Year | 1959 |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Pinhole |
| Wildlife Impact Ind | No |
| Soil Contamination | Yes |
| Long Term Assessment | No |
| Remediation Ind | Yes |
| Soil Remed Ind | Yes |
| Water Contam Ind | No |
| Could Be Hca | No |
| Commodity Reached Hca | No |
| Est Cost Oper Paid | 15000 |
| Est Cost Gas Released | 74770 |
| Est Cost Prop Damage | 420000 |
| Est Cost Emergency | 5000 |
| Est Cost Environmental | 60000 |
| Est Cost Other | 0 |
| Prpty | 574770 |
| Accident Psig | 250 |
| Mop Psig | 650 |
| Accident Pressure | Pressure Did Not Exceed Mop |
| Pressure Restriction Ind | No |
| Length Segment Isolated | 46200 |
| 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 | Yes |
| Scada Conf Ind | Yes |
| Cpm In Place Ind | Yes |
| Cpm Operating Ind | Yes |
| Cpm Functional Ind | Yes |
| Cpm Detection Ind | Yes |
| Cpm Conf Ind | Yes |
| Investigation Status | Yes, specify investigation result(s): (select all that apply) |
| Invest No Schedule Ind | Yes |
| Invest No Schedule Ind Details | Investigation Identified No Controller Issues. Controller Actions Were Consistent With Company Protocols |
| Invest No Control Room Ind | Yes |
| Invest No Controller 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 | 1959 |
| Shielding Evident | No |
| Cathodic Survey Type | Yes |
| Cp Annual Survey Ind | Yes |
| Close Interval Survey Ind | Yes |
| Cp Annual Survey Year | 2019 |
| Close Interval Survey Year | 2019 |
| Prior Damage | No |
| Collected Data Ind | Yes |
| Axial Magnetic Flx Lkg Ind | Yes |
| Geometry Deformation Ind | Yes |
| Axial Recent Year | 2019 |
| Geometry Recent Year | 2019 |
| Has Hydrtst Conduc Before Ind | No |
| Direct Asmnt Conducted | No |
| Non Destructive Exam Ind | No |
| Preparer Name | C********** P****** |
| Preparer Title | Regulatory Compliance Specialist |
| Preparer Email | C******************@e*************.com |
| Preparer Telephone | 713-989-4464 |
| Prepared Date | 2020-04-09 00:00:00 |
| Authorizer Name | C**** K***** |
| Authorizer Telephone | 713-989-7077 |
| Authorizer Title | Manager-Intrastate Regulatory Compliance |
| Authorizer Email | C***********@e*************.com |
| Narrative | On 11/3/19 measurement personnel noted inconsistencies in volume calculations on the tx-107 viola 8 inch butane pipeline. Measurement personnel began inspecting and testing measurement equipment to determine if inconsistencies noted in volume were due to equipment errors or other malfunction. On 11/6/19 at 21:15 the leak detection system alarmed on the tx-107 viola 8 inch. The control center notified operations and measurement personnel. A crew was dispatched to patrol the row and search for indications of a release however due to heavy rains and flooding the search could not be fully completed that same day. After conditions improved the patrol was resumed on 11/7/19 and at approximately 14:00 the crew identified indications of a release, contacted the control center and the line was shut down immediately. Upstream and downstream block valves were closed to isolate the release. Based upon visible surface conditions and prior to excavation an initial estimate of 10 bbls of unintentionally released product was made. On 11/7/19 the nrc was contacted at 14:29 and report no. 1263380 was issued. The tx rrc was contacted at 14:52 and incident no. 2089 was assigned. The required follow up nrc report was filed on 11/8/19 at 13:42 and report no. 1263465 was issued. Due to extremely wet surface conditions excavation equipment was not able to be fully moved in until 11/8/19. Excavation progress was slowed further by presence of other pipelines in the same row and practices to ensure the product (butane) did not flash. Due to the slow pace of excavation the pipe was not exposed until 11/9/19. Based on observations once the area was fully excavated and the pipe exposed it was determined that the release was larger than initially estimated. The product formed an ice ball and the dimensions of that allowed a revised calculation of the release to be made. Approximately 2618 bbls was calculated to have been released unintentionally. Upon examination in the field multiple external corrosion pinholes were identified. Permanent repair was made by a replacement of approximately 184 feet of new pipe and the pipeline was restarted on 11/21/19. A def/mfl ili tool was run on the tx-107 viola 8 inch on 10/8/19. The vendor report had not yet been received when the release occurred. The vendor final report was received on 12/18/19 and indicated a high percentage metal loss anomaly at the release location. Other metal loss tool calls on the failed and cut out section of pipe were measured and used to validate the tool data. No other metal loss calls requiring timed repairs were discovered in this area. Prior ili data sets are also being reviewed and based on results the reassessment interval will be confirmed or adjusted. Via field testing and surveys, it was determined that the cathodic protection system in this area is subject to stray current interference. To mitigate the condition six (6) new impressed current cathodic protection systems are currently being installed. Once installation is complete the line will be allowed to fully polarize and a cycled cis will be conducted. Following this survey a depolarized cis survey will be conducted to ensure adequate and compliant levels of cathodic protection are in place. Based on survey results adequate cathodic will be confirmed or additional remedial measures identified and implemented. |
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