Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2012-09-13 — TX
Operator
Enterprise Products Operating Llc
Cause
Material Failure Of Pipe Or Weld
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)
$160,000
Incident datetime
2012-09-13 15:28
Report number
Location
TX
Narrative
At 1528 hrs both pumps at forsan pump station on the seminole blue pipeline (line id #1) shut down with a drastic loss of pressure as noticed on scada. The controller contacted the field technician who advised he had just received a call from a third party contractor reporting a fire near forsan station, in howard county, tx. Seminole blue line was immediately shut down and isolated. The big springs fire dept was contacted and responded to the site. Upon arrival it was confirmed that the underground pipeline had ruptured. There were no injuries, evacuations, road closures reported, and no waterways were affected. Metallurgical analysis of the failure specimen concluded "the failure was caused by longitudinal stress corrosion cracking (scc). The rupture initiated at a longitudianl stress-corrosion crack in the heat affected zone (haz) of the longitudinal erw seam. The stress-corrosion crack consisted of several shorter cracks that coalesced to form one crack that was approximately 4.2 inches long. The maximum depth of the crack was 0.219 inch, which is equivalent to 87.6% of the nominal pipe wall thickness of 0.250 inch. In cross sections through the scc crack at the failure origin, the presence of small tunnels in the pipe steel near the failure origin, other cracks, and external corrosion pits suggested that microbiologically influenced corrosion (mic) may have occurred. The failure propagated in both axial directions from the failure origin, arresting at gw 2520 in the upstream direction, and at the fillet weld of a repair sleeve in the downstream direction. Virtually all of the failure (I.E., the origin and the straight, longitudianlly oriented portion of the propagated fracture) was confined to the heat affected zone of the high-frequency erw pipe seam."
Detailed record list
Report Received Date
2012-10-03 00:00:00
Iyear
2012
Report Number
20120284
Supplemental Number
20643
Report Type
Supplemental Final
Operator Id
31618
Name
Enterprise Products Operating Llc
Operator Street Address
1100 Louisiana Street
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77002
Local Datetime
2012-09-13 15:28:00
Location Latitude
32.1057904
Location Longitude
-101.2216288
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
6700
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
2012-09-13 15:28:00
System Part Involved
Onshore Pipeline, Including Valve Sites
On Off Shore
Onshore
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2012-09-13 15:28:00
Restart Datetime
2012-09-15 23:33:00
On Site Datetime
2012-09-13 16:08:00
Nrc Rpt Datetime
2012-09-13 17:06:00
Nrc Rpt Num
1024365
Ignite Ind
Yes
Explode Ind
Yes
Upstream Valve Type Ind
Remotely Controlled
Downstream Valve Type Ind
Check Valve
Num Pub Evacuated
0
Pipe Fac Name
Seminole Pipeline
Segment Name
Seminole Blue Pipeline - Forsan To Millersview
Onshore State Abbreviation
Tx
Onshore Postal Code
79720
Onshore City Name
Forsan
Onshore County Name
Howard
Designated Location
Milepost/valve Station
Designated Name
Mp 115
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Other
Incident Area Details
Exposed Due To Pipe Rupture
Depth Of Cover
62
Crossing
No
Pipe Facility Type
Intrastate
Item Involved
Pipe
Pipe Type
Pipe Body
Pipe Diameter
14
Pipe Wall Thickness
0.25
Pipe Smys
65000
Pipe Specification
Api 5lx
Pipe Seam Type
Erw - High Frequency
Pipe Manufacturer
American Steel
Pipe Coating Type
Other
Pipe Coating Details
Plastic (Polyken) Tape
Installation Year
1981
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Rupture
Rupture Orient
Longitudinal
Rupture Width
32
Rupture Length
384
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
0
Est Cost Gas Released
94000
Est Cost Prop Damage
160000
Est Cost Emergency
10000
Est Cost Environmental
0
Est Cost Other
0
Prpty
264000
Accident Psig
1342
Mop Psig
1347
Accident Pressure
Pressure Did Not Exceed Mop
Pressure Restriction Ind
No
Length Segment Isolated
27058
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
No
Cpm Conf Ind
No
Investigation Status
Yes, specify investigation result(s): (select all that apply)
Invest Schedule Ind
Yes
Invest No Control Room Ind
Yes
Invest No Controller Ind
Yes
Employee Drug Test Ind
Yes
Contractor Drug Test Ind
No
Num Employees Tested
2
Num Employees Failed
0
Cause
Material Failure Of Pipe Or Weld
Cause Details
Environmental Cracking-Related
Metallurgical Ind
Yes
Failure Type
Environmental Cracking-Related
Stress Subtype
Other
Stress Details
Longitudinal Stress Corrosion Cracking
Pwf Additional Other Ind
Yes
Collected Data Ind
Yes
Axial Magnetic Flx Lkg Ind
Yes
Geometry Deformation Ind
Yes
Emat Ind
Yes
Axial Recent Year
2011
Geometry Recent Year
2011
Emat Recent Year
2008
Has Hydrtst Conduc Before Ind
No
Direct Asmnt Conducted
No
Non Destructive Exam Ind
No
Preparer Name
R** L**
Preparer Title
Pipeline Compliance Engineer
Preparer Email
R***@e****.com
Preparer Telephone
7133816741
Prepared Date
2015-08-04 00:00:00
Authorizer Name
R** L**
Authorizer Telephone
7133816741
Authorizer Title
Pipeline Compliance Engineer
Authorizer Email
R***@e****.com
Narrative
At 1528 hrs both pumps at forsan pump station on the seminole blue pipeline (line id #1) shut down with a drastic loss of pressure as noticed on scada. The controller contacted the field technician who advised he had just received a call from a third party contractor reporting a fire near forsan station, in howard county, tx. Seminole blue line was immediately shut down and isolated. The big springs fire dept was contacted and responded to the site. Upon arrival it was confirmed that the underground pipeline had ruptured. There were no injuries, evacuations, road closures reported, and no waterways were affected. Metallurgical analysis of the failure specimen concluded "the failure was caused by longitudinal stress corrosion cracking (scc). The rupture initiated at a longitudianl stress-corrosion crack in the heat affected zone (haz) of the longitudinal erw seam. The stress-corrosion crack consisted of several shorter cracks that coalesced to form one crack that was approximately 4.2 inches long. The maximum depth of the crack was 0.219 inch, which is equivalent to 87.6% of the nominal pipe wall thickness of 0.250 inch. In cross sections through the scc crack at the failure origin, the presence of small tunnels in the pipe steel near the failure origin, other cracks, and external corrosion pits suggested that microbiologically influenced corrosion (mic) may have occurred. The failure propagated in both axial directions from the failure origin, arresting at gw 2520 in the upstream direction, and at the fillet weld of a repair sleeve in the downstream direction. Virtually all of the failure (I.E., the origin and the straight, longitudianlly oriented portion of the propagated fracture) was confined to the heat affected zone of the high-frequency erw pipe seam."
| Report Received Date | 2012-10-03 00:00:00 |
|---|---|
| Iyear | 2012 |
| Report Number | 20120284 |
| Supplemental Number | 20643 |
| Report Type | Supplemental Final |
| Operator Id | 31618 PHMSA Enforcement |
| Name | Enterprise Products Operating Llc |
| Operator Street Address | 1100 Louisiana Street |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77002 |
| Local Datetime | 2012-09-13 15:28:00 |
| Location Latitude | 32.1057904 Google Maps OpenStreetMap |
| Location Longitude | -101.2216288 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 | 6700 |
| 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 | 2012-09-13 15:28:00 |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| On Off Shore | Onshore |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2012-09-13 15:28:00 |
| Restart Datetime | 2012-09-15 23:33:00 |
| On Site Datetime | 2012-09-13 16:08:00 |
| Nrc Rpt Datetime | 2012-09-13 17:06:00 |
| Nrc Rpt Num | 1024365 NRC Report How to search |
| Ignite Ind | Yes |
| Explode Ind | Yes |
| Upstream Valve Type Ind | Remotely Controlled |
| Downstream Valve Type Ind | Check Valve |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Seminole Pipeline |
| Segment Name | Seminole Blue Pipeline - Forsan To Millersview |
| Onshore State Abbreviation | Tx |
| Onshore Postal Code | 79720 |
| Onshore City Name | Forsan |
| Onshore County Name | Howard |
| Designated Location | Milepost/valve Station |
| Designated Name | Mp 115 |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Other |
| Incident Area Details | Exposed Due To Pipe Rupture |
| Depth Of Cover | 62 |
| Crossing | No |
| Pipe Facility Type | Intrastate |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Pipe Diameter | 14 |
| Pipe Wall Thickness | 0.25 |
| Pipe Smys | 65000 |
| Pipe Specification | Api 5lx |
| Pipe Seam Type | Erw - High Frequency |
| Pipe Manufacturer | American Steel |
| Pipe Coating Type | Other |
| Pipe Coating Details | Plastic (Polyken) Tape |
| Installation Year | 1981 |
| Manufactured Year | Unknown |
| Material Involved | Carbon Steel |
| Release Type | Rupture |
| Rupture Orient | Longitudinal |
| Rupture Width | 32 |
| Rupture Length | 384 |
| 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 | 0 |
| Est Cost Gas Released | 94000 |
| Est Cost Prop Damage | 160000 |
| Est Cost Emergency | 10000 |
| Est Cost Environmental | 0 |
| Est Cost Other | 0 |
| Prpty | 264000 |
| Accident Psig | 1342 |
| Mop Psig | 1347 |
| Accident Pressure | Pressure Did Not Exceed Mop |
| Pressure Restriction Ind | No |
| Length Segment Isolated | 27058 |
| 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 | No |
| Cpm Conf Ind | No |
| Investigation Status | Yes, specify investigation result(s): (select all that apply) |
| Invest Schedule Ind | Yes |
| Invest No Control Room Ind | Yes |
| Invest No Controller Ind | Yes |
| Employee Drug Test Ind | Yes |
| Contractor Drug Test Ind | No |
| Num Employees Tested | 2 |
| Num Employees Failed | 0 |
| Cause | Material Failure Of Pipe Or Weld |
| Cause Details | Environmental Cracking-Related |
| Metallurgical Ind | Yes |
| Failure Type | Environmental Cracking-Related |
| Stress Subtype | Other |
| Stress Details | Longitudinal Stress Corrosion Cracking |
| Pwf Additional Other Ind | Yes |
| Collected Data Ind | Yes |
| Axial Magnetic Flx Lkg Ind | Yes |
| Geometry Deformation Ind | Yes |
| Emat Ind | Yes |
| Axial Recent Year | 2011 |
| Geometry Recent Year | 2011 |
| Emat Recent Year | 2008 |
| Has Hydrtst Conduc Before Ind | No |
| Direct Asmnt Conducted | No |
| Non Destructive Exam Ind | No |
| Preparer Name | R** L** |
| Preparer Title | Pipeline Compliance Engineer |
| Preparer Email | R***@e****.com |
| Preparer Telephone | 7133816741 |
| Prepared Date | 2015-08-04 00:00:00 |
| Authorizer Name | R** L** |
| Authorizer Telephone | 7133816741 |
| Authorizer Title | Pipeline Compliance Engineer |
| Authorizer Email | R***@e****.com |
| Narrative | At 1528 hrs both pumps at forsan pump station on the seminole blue pipeline (line id #1) shut down with a drastic loss of pressure as noticed on scada. The controller contacted the field technician who advised he had just received a call from a third party contractor reporting a fire near forsan station, in howard county, tx. Seminole blue line was immediately shut down and isolated. The big springs fire dept was contacted and responded to the site. Upon arrival it was confirmed that the underground pipeline had ruptured. There were no injuries, evacuations, road closures reported, and no waterways were affected. Metallurgical analysis of the failure specimen concluded "the failure was caused by longitudinal stress corrosion cracking (scc). The rupture initiated at a longitudianl stress-corrosion crack in the heat affected zone (haz) of the longitudinal erw seam. The stress-corrosion crack consisted of several shorter cracks that coalesced to form one crack that was approximately 4.2 inches long. The maximum depth of the crack was 0.219 inch, which is equivalent to 87.6% of the nominal pipe wall thickness of 0.250 inch. In cross sections through the scc crack at the failure origin, the presence of small tunnels in the pipe steel near the failure origin, other cracks, and external corrosion pits suggested that microbiologically influenced corrosion (mic) may have occurred. The failure propagated in both axial directions from the failure origin, arresting at gw 2520 in the upstream direction, and at the fillet weld of a repair sleeve in the downstream direction. Virtually all of the failure (I.E., the origin and the straight, longitudianlly oriented portion of the propagated fracture) was confined to the heat affected zone of the high-frequency erw pipe seam." |
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