Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2018-11-04 — TX
Operator
American Midstream Bakken, Llc
Cause
Miscellaneous Root Causes
Commodity
Crude Oil
Program
HL
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$48,760
Incident datetime
2018-11-04 17:23
Report number
Location
TX
Narrative
American midstream received the completed analysis report from stress engineering services regarding the failure of the pipeline. Ses was asked to determine the mechanism of fracture for the weld neck flange. Ses performed visual examination, wet fluorescent magnetic particle examination, scanning electron microscopy(sem) analysis, metallography, hardness tests, and chemical analysis. Based on these tests and analyses, ses concluded the following: 1. The weld neck flange separated adjacent to a weld by bending overload mechanism likely from an external source. The fracture exhibited a 45 degree shear, ductile dimples, grain deformation and necking typical of an overload fracture. 2. No brittle or fatigue fracture features were evident on the fracture surface. 3. The ferrite-pearlite microstructure and hardness of the weld neck flange is typical of carbon steels. No manufacturing anomalies or discrepancies were observed in this analysis. 4. The chemical analysis of the weld neck flange was satisfactory to the requirements of specification astm a694, grade f52.
Detailed record list
Report Received Date
2018-12-05 00:00:00
Iyear
2018
Report Number
20180378
Supplemental Number
33173
Report Type
Supplemental
Operator Id
39277
Name
American Midstream Bakken, Llc
Operator Street Address
2103 Citywest Blvd. Bldg. 4, Ste. 800
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77042
Local Datetime
2018-11-04 17:23:00
Location Latitude
47.759103
Location Longitude
-103.32878
Commodity Released Type
Crude Oil
Unintentional Release Bbls
45
Recovered Bbls
30
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Local Operating Personnel, Including Contractors
Operator Type
Contractor Working For The Operator
Incident Identified Datetime
2018-11-04 17:23:00
System Part Involved
Onshore Pipeline, Including Valve Sites
On Off Shore
Onshore
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2018-11-04 17:45:00
Restart Datetime
2018-11-17 17:00:00
On Site Datetime
2018-11-04 17:23:00
Nrc Rpt Datetime
2018-11-04 18:35:00
Nrc Rpt Num
1229420
Ignite Ind
No
Explode Ind
No
Upstream Valve Type Ind
Manual
Downstream Valve Type Ind
Manual
Num Pub Evacuated
0
Pipe Fac Name
Bakken Pipeline
Segment Name
Nf-Ew4
Onshore State Abbreviation
Nd
Onshore Postal Code
58854
Onshore City Name
Not Within A Municipality
Onshore County Name
Mckenzie
Designated Location
Survey Station No.
Designated Name
Acvg Dig #1
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Exposed Due To Excavation
Depth Of Cover
60
Crossing
No
Pipe Facility Type
Intrastate
Item Involved
Pipe
Pipe Type
Pipe Body
Pipe Diameter
2
Pipe Wall Thickness
Unknown
Pipe Smys
Unknown
Pipe Specification
42,000
Pipe Seam Type
Seamless
Pipe Manufacturer
Unknown
Pipe Coating Type
Fusion Bonded Epoxy(Fbe)
Installation Year
2014
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Other
Release Type Details
Amid Contractors Were Exposing Line For Integrity Dig Due To Finding From Acvg Test. Pipe Is Currently At Stress Engineering Lab In Houston, Tx For Examination. Cause Is Still Under Investigation.
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
50000
Est Cost Gas Released
4000
Est Cost Prop Damage
48760
Est Cost Emergency
5000
Est Cost Environmental
50000
Est Cost Other
22000
Est Cost Other Details
Metallurgical Lab Cost And Shipping
Prpty
179760
Accident Psig
70
Mop Psig
900
Accident Pressure
Pressure Did Not Exceed Mop
Pressure Restriction Ind
No
Length Segment Isolated
24024
Internal Inspection Ind
No
Other Inspection Ind
Yes
Internal Inspection Details
Failure Was On A 2" Blinded Tap.
Operation Complications Ind
No
Pipeline Function
=< 20% Smys Regulated Gathering
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
No
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 incident occurred while contractors were directly working on that pipe segment. It was seen immediately upon occurrence by the local contractor on site.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Excavation Damage
Cause Details
Excavation Damage By Operator's Contractor (Second Party)
Ex Party Type
Excavation Damage By Operator's Contractor (Second Party)
Notify Cga Dirt
No
Private Row Ind
Yes
Private Subtype
Private Landowner
Pipeline Easement Row Ind
Yes
Excavator Type
Contractor
Excavator Equipment
Backhoe/trackhoe
Work Performed
Liquid Pipeline
One Call Notified Ind
Yes
One Call Ticket Num
78162207
Locator Type
Utility Owner
Visible Marks
No
Service Interruption
Yes
Service Interruption Hours
312
Root Cause Category
Miscellaneous Root Causes
Root Cause Type
Root Cause Not Listed (Comment Required)
Root Cause Type Other
Unidentified 2" Tap Off Of Located Pipeline
Preparer Name
R**** L********
Preparer Title
Pipeline Transportation Compliance Sr. Manager
Preparer Email
R*********@a****************.com
Preparer Telephone
361-960-5671
Prepared Date
2020-01-09 00:00:00
Authorizer Name
R**** L********
Authorizer Telephone
361-960-5671
Authorizer Title
Pipeline Transportation Compliance Sr. Manager
Authorizer Email
R*********@a****************.com
Narrative
American midstream received the completed analysis report from stress engineering services regarding the failure of the pipeline. Ses was asked to determine the mechanism of fracture for the weld neck flange. Ses performed visual examination, wet fluorescent magnetic particle examination, scanning electron microscopy(sem) analysis, metallography, hardness tests, and chemical analysis. Based on these tests and analyses, ses concluded the following: 1. The weld neck flange separated adjacent to a weld by bending overload mechanism likely from an external source. The fracture exhibited a 45 degree shear, ductile dimples, grain deformation and necking typical of an overload fracture. 2. No brittle or fatigue fracture features were evident on the fracture surface. 3. The ferrite-pearlite microstructure and hardness of the weld neck flange is typical of carbon steels. No manufacturing anomalies or discrepancies were observed in this analysis. 4. The chemical analysis of the weld neck flange was satisfactory to the requirements of specification astm a694, grade f52.
| Report Received Date | 2018-12-05 00:00:00 |
|---|---|
| Iyear | 2018 |
| Report Number | 20180378 |
| Supplemental Number | 33173 |
| Report Type | Supplemental |
| Operator Id | 39277 PHMSA Enforcement |
| Name | American Midstream Bakken, Llc |
| Operator Street Address | 2103 Citywest Blvd. Bldg. 4, Ste. 800 |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77042 |
| Local Datetime | 2018-11-04 17:23:00 |
| Location Latitude | 47.759103 Google Maps OpenStreetMap |
| Location Longitude | -103.32878 Google Maps OpenStreetMap |
| Commodity Released Type | Crude Oil |
| Unintentional Release Bbls | 45 |
| Recovered Bbls | 30 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Local Operating Personnel, Including Contractors |
| Operator Type | Contractor Working For The Operator |
| Incident Identified Datetime | 2018-11-04 17:23:00 |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| On Off Shore | Onshore |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2018-11-04 17:45:00 |
| Restart Datetime | 2018-11-17 17:00:00 |
| On Site Datetime | 2018-11-04 17:23:00 |
| Nrc Rpt Datetime | 2018-11-04 18:35:00 |
| Nrc Rpt Num | 1229420 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 | Bakken Pipeline |
| Segment Name | Nf-Ew4 |
| Onshore State Abbreviation | Nd |
| Onshore Postal Code | 58854 |
| Onshore City Name | Not Within A Municipality |
| Onshore County Name | Mckenzie |
| Designated Location | Survey Station No. |
| Designated Name | Acvg Dig #1 |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Exposed Due To Excavation |
| Depth Of Cover | 60 |
| Crossing | No |
| Pipe Facility Type | Intrastate |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Pipe Diameter | 2 |
| Pipe Wall Thickness | Unknown |
| Pipe Smys | Unknown |
| Pipe Specification | 42,000 |
| Pipe Seam Type | Seamless |
| Pipe Manufacturer | Unknown |
| Pipe Coating Type | Fusion Bonded Epoxy(Fbe) |
| Installation Year | 2014 |
| Manufactured Year | Unknown |
| Material Involved | Carbon Steel |
| Release Type | Other |
| Release Type Details | Amid Contractors Were Exposing Line For Integrity Dig Due To Finding From Acvg Test. Pipe Is Currently At Stress Engineering Lab In Houston, Tx For Examination. Cause Is Still Under Investigation. |
| 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 | 50000 |
| Est Cost Gas Released | 4000 |
| Est Cost Prop Damage | 48760 |
| Est Cost Emergency | 5000 |
| Est Cost Environmental | 50000 |
| Est Cost Other | 22000 |
| Est Cost Other Details | Metallurgical Lab Cost And Shipping |
| Prpty | 179760 |
| Accident Psig | 70 |
| Mop Psig | 900 |
| Accident Pressure | Pressure Did Not Exceed Mop |
| Pressure Restriction Ind | No |
| Length Segment Isolated | 24024 |
| Internal Inspection Ind | No |
| Other Inspection Ind | Yes |
| Internal Inspection Details | Failure Was On A 2" Blinded Tap. |
| Operation Complications Ind | No |
| Pipeline Function | =< 20% Smys Regulated Gathering |
| 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 | No |
| 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 incident occurred while contractors were directly working on that pipe segment. It was seen immediately upon occurrence by the local contractor on site. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Excavation Damage |
| Cause Details | Excavation Damage By Operator's Contractor (Second Party) |
| Ex Party Type | Excavation Damage By Operator's Contractor (Second Party) |
| Notify Cga Dirt | No |
| Private Row Ind | Yes |
| Private Subtype | Private Landowner |
| Pipeline Easement Row Ind | Yes |
| Excavator Type | Contractor |
| Excavator Equipment | Backhoe/trackhoe |
| Work Performed | Liquid Pipeline |
| One Call Notified Ind | Yes |
| One Call Ticket Num | 78162207 |
| Locator Type | Utility Owner |
| Visible Marks | No |
| Service Interruption | Yes |
| Service Interruption Hours | 312 |
| Root Cause Category | Miscellaneous Root Causes |
| Root Cause Type | Root Cause Not Listed (Comment Required) |
| Root Cause Type Other | Unidentified 2" Tap Off Of Located Pipeline |
| Preparer Name | R**** L******** |
| Preparer Title | Pipeline Transportation Compliance Sr. Manager |
| Preparer Email | R*********@a****************.com |
| Preparer Telephone | 361-960-5671 |
| Prepared Date | 2020-01-09 00:00:00 |
| Authorizer Name | R**** L******** |
| Authorizer Telephone | 361-960-5671 |
| Authorizer Title | Pipeline Transportation Compliance Sr. Manager |
| Authorizer Email | R*********@a****************.com |
| Narrative | American midstream received the completed analysis report from stress engineering services regarding the failure of the pipeline. Ses was asked to determine the mechanism of fracture for the weld neck flange. Ses performed visual examination, wet fluorescent magnetic particle examination, scanning electron microscopy(sem) analysis, metallography, hardness tests, and chemical analysis. Based on these tests and analyses, ses concluded the following: 1. The weld neck flange separated adjacent to a weld by bending overload mechanism likely from an external source. The fracture exhibited a 45 degree shear, ductile dimples, grain deformation and necking typical of an overload fracture. 2. No brittle or fatigue fracture features were evident on the fracture surface. 3. The ferrite-pearlite microstructure and hardness of the weld neck flange is typical of carbon steels. No manufacturing anomalies or discrepancies were observed in this analysis. 4. The chemical analysis of the weld neck flange was satisfactory to the requirements of specification astm a694, grade f52. |
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