Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2014-07-26 — TX
Operator
Anr Pipeline Co
Cause
Corrosion Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$235,000
Incident datetime
2014-07-26 17:38
Report number
Location
TX
Narrative
On 26 july 2014, a third-party helicopter patrol observed a release of gas located in west cameron block 165 (29.37260800, -93.54129500) south of cameron parish in the gulf of mexico. The leak was reported to anr pipeline company, operator for tc offshore, as an approximately ten foot in diameter bubbling over the location of tc offshore's 687 transmission pipeline. The section of 687 line containing the leak was shut in by a check valve on the downstream side and by closing a valve on the upstream side. No sheen or product was reported at the surface of the water. Following the section being shut in, contract employees were deployed to the site to investigate and repair the leak. Prior to the arrival of the contractors, helicopter patrols were conducted in the area to monitor the leak and conditions of the site. No sheen or product was reported for the duration of aerial monitoring while the pipeline was being repaired. On 29 july, anr and contract personnel from cal-dive international arrived at the leak location in west cameron block 165 to inspect the pipe and repair the leak. At approximately 12:00 cdt, divers entered the water and determined the location of the leak. After determining the approximate location of the leak, pipeline pressure was reduced to 80 psig water, and water blasting was used to remove the concrete coating from the pipe to prepare for the installation of a plidco ten inch bolt-on clamp over the leak. The clamp was then installed according to manufacturer specifications, the exposed pipe wrapped in syntho-glass, and pipeline backfilled. Finally, the pipeline was monitored during repressurization to confirm that the leak was sucessfully repaired.
Detailed record list
Report Received Date
2014-08-25 00:00:00
Iyear
2014
Report Number
20140091
Supplemental Number
16480
Report Type
Original Final
Operator Id
Name
Anr Pipeline Co
Operator Street Address
700 Louisiana Street Suite 700
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77002
Local Datetime
2014-07-26 17:38:00
Location Latitude
29.372608
Location Longitude
-93.541295
Nrc Rpt Num
1090355
Nrc Rpt Datetime
2014-07-26 18:20:00
Commodity Released Type
Natural Gas
Unintentional Release
1
Intentional Release
2261
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2014-07-26 17:38:00
Restart Datetime
2014-07-31 06:55:00
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Incident Identified Datetime
2014-07-26 17:38:00
On Site Datetime
2014-07-29 08:10:00
On Off Shore
Offshore
Off Water Depth
49
Off Accident Origin
On The Outer Continental Shelf (Ocs)
Off Ocs Area
West Cameron
Off Ocs Block
165
Off Area Accident Type
Below Water, Pipe Buried Or Jetted Below Seabed
Pipe Facility Type
Interstate
System Part Involved
Offshore Pipeline, Including Riser And Riser Bend
Item Involved
Pipe
Pipe Type
Pipe Body
Pipe Diameter
10.75
Pipe Wall Thickness
0.365
Pipe Smys
42000
Pipe Specification
Api-5l
Pipe Seam Type
Seamless
Pipe Manufacturer
Unknown
Pipe Coating Type
Epoxy
Installation Year
2006
Manufactured Year
2005
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Pinhole
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
327
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
4
Est Cost Intentional Release
8730
Est Cost Prop Damage
235000
Est Cost Emergency
0
Est Cost Other
0
Prpty
243734
Accident Psig
775
Mop Psig
1300
Mop Cfr Section
Not On Omb-Approved Form When Submitted
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Upstream Valve Type Ind
Manual
Downstream Valve Type Ind
Automatic
Length Segment Isolated
45725
Internal Inspection Ind
No
Other Inspection Ind
Yes
Internal Inspection Details
Lateral Line Hot Taps Into Another Lateral
Operation Complications Ind
Yes
Other Complications Ind
Yes
Inspect Comp Details
Hot Taps Into Another Line
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
Notification From Public
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
The small size of the defect and the amount of gas leaking
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Corrosion Failure
Cause Details
Internal Corrosion
Internal External
Internal Corrosion
Int Visual Exam Results
Not Cut Open
Int Microbiological Ind
Yes
Int Field Exam Basis Ind
Yes
Int Low Point Pipe Loc Ind
Yes
Corrosion Inhibitors
No
Corrosion Lining
No
Cleaning Dewatering
No
Corrosion Coupons
Yes
Collected Data Ind
No
Has Hydrtst Conduc Before Ind
No
Direct Asmnt Conducted
No
Non Destructive Exam Ind
No
Preparer Name
R**** R* S*****
Preparer Title
Field Compliance Specialist
Preparer Email
R***********@t**********.com
Preparer Telephone
8325702966
Authorizer Name
R**** S*****
Authorizer Title
Field Compliance Specialist
Authorizer Telephone
832-570-2966
Authorizer Email
R***********@t**********.com
Narrative
On 26 july 2014, a third-party helicopter patrol observed a release of gas located in west cameron block 165 (29.37260800, -93.54129500) south of cameron parish in the gulf of mexico. The leak was reported to anr pipeline company, operator for tc offshore, as an approximately ten foot in diameter bubbling over the location of tc offshore's 687 transmission pipeline. The section of 687 line containing the leak was shut in by a check valve on the downstream side and by closing a valve on the upstream side. No sheen or product was reported at the surface of the water. Following the section being shut in, contract employees were deployed to the site to investigate and repair the leak. Prior to the arrival of the contractors, helicopter patrols were conducted in the area to monitor the leak and conditions of the site. No sheen or product was reported for the duration of aerial monitoring while the pipeline was being repaired. On 29 july, anr and contract personnel from cal-dive international arrived at the leak location in west cameron block 165 to inspect the pipe and repair the leak. At approximately 12:00 cdt, divers entered the water and determined the location of the leak. After determining the approximate location of the leak, pipeline pressure was reduced to 80 psig water, and water blasting was used to remove the concrete coating from the pipe to prepare for the installation of a plidco ten inch bolt-on clamp over the leak. The clamp was then installed according to manufacturer specifications, the exposed pipe wrapped in syntho-glass, and pipeline backfilled. Finally, the pipeline was monitored during repressurization to confirm that the leak was sucessfully repaired.
| Report Received Date | 2014-08-25 00:00:00 |
|---|---|
| Iyear | 2014 |
| Report Number | 20140091 |
| Supplemental Number | 16480 |
| Report Type | Original Final |
| Operator Id | 405 PHMSA Enforcement |
| Name | Anr Pipeline Co |
| Operator Street Address | 700 Louisiana Street Suite 700 |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77002 |
| Local Datetime | 2014-07-26 17:38:00 |
| Location Latitude | 29.372608 Google Maps OpenStreetMap |
| Location Longitude | -93.541295 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1090355 NRC Report How to search |
| Nrc Rpt Datetime | 2014-07-26 18:20:00 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 1 |
| Intentional Release | 2261 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2014-07-26 17:38:00 |
| Restart Datetime | 2014-07-31 06:55:00 |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2014-07-26 17:38:00 |
| On Site Datetime | 2014-07-29 08:10:00 |
| On Off Shore | Offshore |
| Off Water Depth | 49 |
| Off Accident Origin | On The Outer Continental Shelf (Ocs) |
| Off Ocs Area | West Cameron |
| Off Ocs Block | 165 |
| Off Area Accident Type | Below Water, Pipe Buried Or Jetted Below Seabed |
| Pipe Facility Type | Interstate |
| System Part Involved | Offshore Pipeline, Including Riser And Riser Bend |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Pipe Diameter | 10.75 |
| Pipe Wall Thickness | 0.365 |
| Pipe Smys | 42000 |
| Pipe Specification | Api-5l |
| Pipe Seam Type | Seamless |
| Pipe Manufacturer | Unknown |
| Pipe Coating Type | Epoxy |
| Installation Year | 2006 |
| Manufactured Year | 2005 |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Pinhole |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 327 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 4 |
| Est Cost Intentional Release | 8730 |
| Est Cost Prop Damage | 235000 |
| Est Cost Emergency | 0 |
| Est Cost Other | 0 |
| Prpty | 243734 |
| Accident Psig | 775 |
| Mop Psig | 1300 |
| Mop Cfr Section | Not On Omb-Approved Form When Submitted View CFR 49 §192 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | No |
| Upstream Valve Type Ind | Manual |
| Downstream Valve Type Ind | Automatic |
| Length Segment Isolated | 45725 |
| Internal Inspection Ind | No |
| Other Inspection Ind | Yes |
| Internal Inspection Details | Lateral Line Hot Taps Into Another Lateral |
| Operation Complications Ind | Yes |
| Other Complications Ind | Yes |
| Inspect Comp Details | Hot Taps Into Another Line |
| 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 | Notification From Public |
| 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 | The small size of the defect and the amount of gas leaking |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Corrosion Failure |
| Cause Details | Internal Corrosion |
| Internal External | Internal Corrosion |
| Int Visual Exam Results | Not Cut Open |
| Int Microbiological Ind | Yes |
| Int Field Exam Basis Ind | Yes |
| Int Low Point Pipe Loc Ind | Yes |
| Corrosion Inhibitors | No |
| Corrosion Lining | No |
| Cleaning Dewatering | No |
| Corrosion Coupons | Yes |
| Collected Data Ind | No |
| Has Hydrtst Conduc Before Ind | No |
| Direct Asmnt Conducted | No |
| Non Destructive Exam Ind | No |
| Preparer Name | R**** R* S***** |
| Preparer Title | Field Compliance Specialist |
| Preparer Email | R***********@t**********.com |
| Preparer Telephone | 8325702966 |
| Authorizer Name | R**** S***** |
| Authorizer Title | Field Compliance Specialist |
| Authorizer Telephone | 832-570-2966 |
| Authorizer Email | R***********@t**********.com |
| Narrative | On 26 july 2014, a third-party helicopter patrol observed a release of gas located in west cameron block 165 (29.37260800, -93.54129500) south of cameron parish in the gulf of mexico. The leak was reported to anr pipeline company, operator for tc offshore, as an approximately ten foot in diameter bubbling over the location of tc offshore's 687 transmission pipeline. The section of 687 line containing the leak was shut in by a check valve on the downstream side and by closing a valve on the upstream side. No sheen or product was reported at the surface of the water. Following the section being shut in, contract employees were deployed to the site to investigate and repair the leak. Prior to the arrival of the contractors, helicopter patrols were conducted in the area to monitor the leak and conditions of the site. No sheen or product was reported for the duration of aerial monitoring while the pipeline was being repaired. On 29 july, anr and contract personnel from cal-dive international arrived at the leak location in west cameron block 165 to inspect the pipe and repair the leak. At approximately 12:00 cdt, divers entered the water and determined the location of the leak. After determining the approximate location of the leak, pipeline pressure was reduced to 80 psig water, and water blasting was used to remove the concrete coating from the pipe to prepare for the installation of a plidco ten inch bolt-on clamp over the leak. The clamp was then installed according to manufacturer specifications, the exposed pipe wrapped in syntho-glass, and pipeline backfilled. Finally, the pipeline was monitored during repressurization to confirm that the leak was sucessfully repaired. |
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