Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2017-11-08 — TX
Operator
Enbridge Offshore (Gas Gathering) L.l.c.
Cause
Incorrect Operation
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$11,075,000
Incident datetime
2017-11-08 01:30
Report number
Location
TX
Narrative
Original report: platform personnel at garden banks block 128a platform began pig loading operations for enbridge 30-inch pipeline segment number 10894 at 12:00 am, november 8, 2017. While pressuring the pig barrel, a release of natural gas occurred, which resulted in a fire at 1:30 am the same day. Two platform personnel received minor injuries for which they were treated at a medical facility and released. All platform personnel were removed from the platform on november 8, 2017. The fire was subsequently extinguished on november 9, 2017 by lowering pressure on the pipeline and personnel returned to the platform. The enbridge 30-inch pipeline has not returned to service. The cause of the incident is under investigation. Supplemental report: enbridge did not operate the platform or the pigging operations. Those activities were conducted by the third party contractor platform operator using their procedures. The platform personnel who were injured were employed by the third party contractor platform operator. Given this employment relationship, enbridge is not aware of whether the platform personnel received DOT drug and alcohol testing. Additionally, enbridge has learned that one of the two injured platform personnel sustained injuries more significant that originally reported. Finally, six members of a painting crew housed in the crew quarters at the time of the incident claim emotional and/or physical injuries, but those claims have not been verified. The pressure in the pipeline was a 1,086 psig at the time of the incident. It is estimated that the pressure within the barrel (at the point of the failure) was 400 psig. The result of the metallurgical investigation indicated that the cause of the incident was incomplete closure of the clamp rings onto the door and barrel flanges which occurred while the third party contractor platform operator was performing routine pipeline maintenance pigging operations on the enbridge 30-inch pipeline. The enbridge 30-inch pipeline was returned to service following the incident on july 11, 2018.
Detailed record list
Report Received Date
2017-12-07 00:00:00
Iyear
2017
Report Number
20170118
Supplemental Number
32108
Report Type
Supplemental Final
Operator Id
31485
Name
Enbridge Offshore (Gas Gathering) L.l.c.
Operator Street Address
915 North Eldridge Parkway
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77079
Local Datetime
2017-11-08 01:20:00
Location Latitude
27.875777
Location Longitude
-91.9863888
Nrc Rpt Num
1196067
Nrc Rpt Datetime
2017-11-09 10:40:00
Commodity Released Type
Natural Gas
Unintentional Release
15
Intentional Release
21000
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2017-11-08 01:30:00
Restart Datetime
2018-07-11 09:00:00
Ignite Ind
Yes
Explode Ind
No
Num Pub Evacuated
0
Incident Identified Datetime
2017-11-08 01:30:00
On Site Datetime
2017-11-08 01:30:00
On Off Shore
Offshore
Off Water Depth
650
Off Accident Origin
On The Outer Continental Shelf (Ocs)
Off Ocs Area
Garden Banks
Off Ocs Block
128
Off Area Accident Type
Platform
Pipe Facility Type
Interstate
System Part Involved
Offshore Platform, Including Platform-Mounted Equipment And Piping
Item Involved
Other
Item Involved Details
Launcher Barrel Enclosure
Installation Year
1997
Material Involved
Carbon Steel
Release Type
Other
Release Type Details
Launcher Door - Incomplete Closure Of The Clamp Rings Onto The Door And Barrel Flanges.
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
920
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
28700000
Est Cost Unintentional Release
45
Est Cost Intentional Release
63000
Est Cost Prop Damage
11075000
Est Cost Emergency
0
Est Cost Other
0
Prpty
39838045
Accident Psig
400
Mop Psig
1975
Mop Cfr Section
192.619(A)(2)
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction 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
Notified By Third Party Contractor Platform Operator
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
Based on information known at the time of this reporting the cause of the event would not have been discoverable by the control room.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Incorrect Operation
Cause Details
Other Incorrect Operation
Operation Type
Other Incorrect Operation
Operation Details
The Third Party Contractor Platform Operator, While Performing Pigging Operations On The Enbridge 30-Inch Pipeline, Did Not Follow Their Procedures And Did Not Completely Close The Clamp Rings Onto The Launcher Door And Barrel Flanges.
Related Failure Follow Ind
Yes
Category Type
Routine Maintenance
Operator Qualification Ind
Yes
Qualified Individuals
Yes, They Were Qualified For The Task(S)
Preparer Name
M**** S******
Preparer Title
Senior Engineer
Preparer Email
M************@e*******.com
Preparer Telephone
713-627-4726
Authorizer Name
R*** K*****
Authorizer Title
Manager
Authorizer Telephone
713-627-6388
Authorizer Email
R**********@e*******.com
Narrative
Original report: platform personnel at garden banks block 128a platform began pig loading operations for enbridge 30-inch pipeline segment number 10894 at 12:00 am, november 8, 2017. While pressuring the pig barrel, a release of natural gas occurred, which resulted in a fire at 1:30 am the same day. Two platform personnel received minor injuries for which they were treated at a medical facility and released. All platform personnel were removed from the platform on november 8, 2017. The fire was subsequently extinguished on november 9, 2017 by lowering pressure on the pipeline and personnel returned to the platform. The enbridge 30-inch pipeline has not returned to service. The cause of the incident is under investigation. Supplemental report: enbridge did not operate the platform or the pigging operations. Those activities were conducted by the third party contractor platform operator using their procedures. The platform personnel who were injured were employed by the third party contractor platform operator. Given this employment relationship, enbridge is not aware of whether the platform personnel received DOT drug and alcohol testing. Additionally, enbridge has learned that one of the two injured platform personnel sustained injuries more significant that originally reported. Finally, six members of a painting crew housed in the crew quarters at the time of the incident claim emotional and/or physical injuries, but those claims have not been verified. The pressure in the pipeline was a 1,086 psig at the time of the incident. It is estimated that the pressure within the barrel (at the point of the failure) was 400 psig. The result of the metallurgical investigation indicated that the cause of the incident was incomplete closure of the clamp rings onto the door and barrel flanges which occurred while the third party contractor platform operator was performing routine pipeline maintenance pigging operations on the enbridge 30-inch pipeline. The enbridge 30-inch pipeline was returned to service following the incident on july 11, 2018.
| Report Received Date | 2017-12-07 00:00:00 |
|---|---|
| Iyear | 2017 |
| Report Number | 20170118 |
| Supplemental Number | 32108 |
| Report Type | Supplemental Final |
| Operator Id | 31485 PHMSA Enforcement |
| Name | Enbridge Offshore (Gas Gathering) L.l.c. |
| Operator Street Address | 915 North Eldridge Parkway |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77079 |
| Local Datetime | 2017-11-08 01:20:00 |
| Location Latitude | 27.875777 Google Maps OpenStreetMap |
| Location Longitude | -91.9863888 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1196067 NRC Report How to search |
| Nrc Rpt Datetime | 2017-11-09 10:40:00 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 15 |
| Intentional Release | 21000 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2017-11-08 01:30:00 |
| Restart Datetime | 2018-07-11 09:00:00 |
| Ignite Ind | Yes |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2017-11-08 01:30:00 |
| On Site Datetime | 2017-11-08 01:30:00 |
| On Off Shore | Offshore |
| Off Water Depth | 650 |
| Off Accident Origin | On The Outer Continental Shelf (Ocs) |
| Off Ocs Area | Garden Banks |
| Off Ocs Block | 128 |
| Off Area Accident Type | Platform |
| Pipe Facility Type | Interstate |
| System Part Involved | Offshore Platform, Including Platform-Mounted Equipment And Piping |
| Item Involved | Other |
| Item Involved Details | Launcher Barrel Enclosure |
| Installation Year | 1997 |
| Material Involved | Carbon Steel |
| Release Type | Other |
| Release Type Details | Launcher Door - Incomplete Closure Of The Clamp Rings Onto The Door And Barrel Flanges. |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 920 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Est Cost Oper Paid | 28700000 |
| Est Cost Unintentional Release | 45 |
| Est Cost Intentional Release | 63000 |
| Est Cost Prop Damage | 11075000 |
| Est Cost Emergency | 0 |
| Est Cost Other | 0 |
| Prpty | 39838045 |
| Accident Psig | 400 |
| Mop Psig | 1975 |
| Mop Cfr Section | 192.619(A)(2) View CFR 49 §192 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction 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 | Notified By Third Party Contractor Platform Operator |
| 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 | Based on information known at the time of this reporting the cause of the event would not have been discoverable by the control room. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Incorrect Operation |
| Cause Details | Other Incorrect Operation |
| Operation Type | Other Incorrect Operation |
| Operation Details | The Third Party Contractor Platform Operator, While Performing Pigging Operations On The Enbridge 30-Inch Pipeline, Did Not Follow Their Procedures And Did Not Completely Close The Clamp Rings Onto The Launcher Door And Barrel Flanges. |
| Related Failure Follow Ind | Yes |
| Category Type | Routine Maintenance |
| Operator Qualification Ind | Yes |
| Qualified Individuals | Yes, They Were Qualified For The Task(S) |
| Preparer Name | M**** S****** |
| Preparer Title | Senior Engineer |
| Preparer Email | M************@e*******.com |
| Preparer Telephone | 713-627-4726 |
| Authorizer Name | R*** K***** |
| Authorizer Title | Manager |
| Authorizer Telephone | 713-627-6388 |
| Authorizer Email | R**********@e*******.com |
| Narrative | Original report: platform personnel at garden banks block 128a platform began pig loading operations for enbridge 30-inch pipeline segment number 10894 at 12:00 am, november 8, 2017. While pressuring the pig barrel, a release of natural gas occurred, which resulted in a fire at 1:30 am the same day. Two platform personnel received minor injuries for which they were treated at a medical facility and released. All platform personnel were removed from the platform on november 8, 2017. The fire was subsequently extinguished on november 9, 2017 by lowering pressure on the pipeline and personnel returned to the platform. The enbridge 30-inch pipeline has not returned to service. The cause of the incident is under investigation. Supplemental report: enbridge did not operate the platform or the pigging operations. Those activities were conducted by the third party contractor platform operator using their procedures. The platform personnel who were injured were employed by the third party contractor platform operator. Given this employment relationship, enbridge is not aware of whether the platform personnel received DOT drug and alcohol testing. Additionally, enbridge has learned that one of the two injured platform personnel sustained injuries more significant that originally reported. Finally, six members of a painting crew housed in the crew quarters at the time of the incident claim emotional and/or physical injuries, but those claims have not been verified. The pressure in the pipeline was a 1,086 psig at the time of the incident. It is estimated that the pressure within the barrel (at the point of the failure) was 400 psig. The result of the metallurgical investigation indicated that the cause of the incident was incomplete closure of the clamp rings onto the door and barrel flanges which occurred while the third party contractor platform operator was performing routine pipeline maintenance pigging operations on the enbridge 30-inch pipeline. The enbridge 30-inch pipeline was returned to service following the incident on july 11, 2018. |
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