Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2014-04-10 — OK
Operator
Oneok Westex Transmission, Llc
Cause
Material Failure Of Pipe Or Weld
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$82,800
Incident datetime
2014-04-10 06:30
Report number
Location
OK
Narrative
At approximately 0450 hours on april 10, 2014, oneok westex transmission (owt) gas control noticed a drop in line pressure at the dora roberts compressor station. Operations personnel were dispatched at 0500 hours to locate the possible leak. Gas control did receive a call at 0630 hours from the public reporting blowing gas in a rural area approximately 6 miles south of penwell, tx and 1/2 mile east of road fm 1601 in ector county. Owt personnel were directed to this site and were able to identify the source of blowing gas as owt line 4000-000, commonly known as the jv or joint venture line. Block valves upstream and downstream of the site were manually closed by 0725 hours and the isolated section of the pipeline was allowed to blow down to atmospheric pressure. The site is rural and there were no buildings intended for human occupancy within 1/2 mile of the site. Local emergency responders were on site when owt personnel arrived at 0645 hours. There was no fire or explosion due to the release. The pipe that failed was secured and sent to a lab in tulsa, ok to determine the cause of the failure. Update: the failure analysis performed by element labs in tulsa, ok concluded that the cause of the failure was an initial ductile failure of a field made girth weld which initiated the failure of the adjoining pipe joint long seam. The third party failure analysis indicated the cause of the girth weld failure was an approximately one quarter inch diameter void located at the location of an adjoining longitudinal pipe joint seam. This girth weld also had areas of incomplete fusion and failed due to ductile overload in the vicinity of the void. Signs of fatigue were also observed on the girth weld failure surfaces along areas of incomplete fusion. When the girth weld failed, the crack propagated into the longitudinal seam and then by rapid brittle fracture, it proceeded down the length of the longitudinal pipe seam causing the pipeline rupture.
Detailed record list
Report Received Date
2014-05-09 00:00:00
Iyear
2014
Report Number
20140049
Supplemental Number
16569
Report Type
Supplemental Final
Operator Id
31531
Name
Oneok Westex Transmission, Llc
Operator Street Address
100 West Fifth Street
Operator City Name
Tulsa
Operator State Abbreviation
OK
Operator Postal Code
74103
Local Datetime
2014-04-10 04:45:00
Location Latitude
31.7093
Location Longitude
-102.57168
Nrc Rpt Num
1079337
Nrc Rpt Datetime
2014-04-10 07:10:00
Commodity Released Type
Natural Gas
Unintentional Release
45792
Intentional Release
832
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2014-04-10 07:25:00
Restart Datetime
2014-04-12 12:00:00
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Incident Identified Datetime
2014-04-10 06:30:00
On Site Datetime
2014-04-10 06:45:00
On Off Shore
Onshore
Onshore State Abbreviation
Tx
Onshore Postal Code
79766
Onshore City Name
Odessa
Onshore County Name
Ector
Designated Location
Milepost
Designated Name
44.49
Pipe Fac Name
Joint Venture
Segment Name
4000-000
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
48
Crossing
No
Pipe Facility Type
Intrastate
System Part Involved
Onshore Pipeline, Including Valve Sites
Item Involved
Pipe
Pipe Type
Pipe Seam
Pipe Diameter
20
Pipe Wall Thickness
0.25
Pipe Smys
56000
Pipe Specification
Api 5lx
Pipe Seam Type
Longitudinal Erw - High Frequency
Pipe Manufacturer
American Steel Pipe
Pipe Coating Type
Coal Tar
Installation Year
1967
Manufactured Year
1967
Material Involved
Carbon Steel
Release Type
Rupture
Rupture Orient
Longitudinal
Rupture Length
588
Rupture Width
20
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
426
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
213388
Est Cost Intentional Release
3843
Est Cost Prop Damage
82800
Est Cost Emergency
0
Est Cost Other
0
Prpty
300031
Accident Psig
943
Mop Psig
953
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
Manual
Length Segment Isolated
103963
Internal Inspection Ind
Yes
Operation Complications Ind
No
Pipeline Function
Transmission System
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
Yes
Scada Conf Ind
Yes
Accident Identifier
Controller
Operator Type
Operator Employee
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 control room was monitoring an inline inspection for an approximately 66 mile segment and the run was approximately 3 miles from completion. The control room recognized a problem and was working with field personnel to identify the cause when a call from the public was received.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Material Failure Of Pipe Or Weld
Cause Details
Design-, Construction-, Installation-, Or Fabrication-Related
Pwjf Failure Type
Design-, Construction-, Installation-, Or Fabrication-Related
Other Analysis Ind
Yes
Other Analysis Details
Third Party Failure Analysis
Other Factor
Yes
Other Factor Details
Girth Weld Anomaly
Additional Lack Fusion Ind
Yes
Pwf Additional Other Ind
Yes
Additional Other Details
Fatigue
Collected Data Ind
Yes
Axial Magnetic Flx Lkg Ind
Yes
Geometry Deformation Ind
Yes
Axial Recent Year
2005
Geometry Recent Year
2005
Has Hydrtst Conduc Before Ind
No
Direct Asmnt Conducted
No
Non Destructive Exam Ind
No
Preparer Name
P**** F***
Preparer Title
Senior Pipeline Safety Engineer
Preparer Email
P*********@o****.com
Preparer Telephone
918 588 7131
Preparer Fax
918 732 1311
Authorizer Name
W***** R* D*****
Authorizer Title
Vice President
Authorizer Telephone
918 588 7424
Authorizer Email
W************@o****.com
Narrative
At approximately 0450 hours on april 10, 2014, oneok westex transmission (owt) gas control noticed a drop in line pressure at the dora roberts compressor station. Operations personnel were dispatched at 0500 hours to locate the possible leak. Gas control did receive a call at 0630 hours from the public reporting blowing gas in a rural area approximately 6 miles south of penwell, tx and 1/2 mile east of road fm 1601 in ector county. Owt personnel were directed to this site and were able to identify the source of blowing gas as owt line 4000-000, commonly known as the jv or joint venture line. Block valves upstream and downstream of the site were manually closed by 0725 hours and the isolated section of the pipeline was allowed to blow down to atmospheric pressure. The site is rural and there were no buildings intended for human occupancy within 1/2 mile of the site. Local emergency responders were on site when owt personnel arrived at 0645 hours. There was no fire or explosion due to the release. The pipe that failed was secured and sent to a lab in tulsa, ok to determine the cause of the failure. Update: the failure analysis performed by element labs in tulsa, ok concluded that the cause of the failure was an initial ductile failure of a field made girth weld which initiated the failure of the adjoining pipe joint long seam. The third party failure analysis indicated the cause of the girth weld failure was an approximately one quarter inch diameter void located at the location of an adjoining longitudinal pipe joint seam. This girth weld also had areas of incomplete fusion and failed due to ductile overload in the vicinity of the void. Signs of fatigue were also observed on the girth weld failure surfaces along areas of incomplete fusion. When the girth weld failed, the crack propagated into the longitudinal seam and then by rapid brittle fracture, it proceeded down the length of the longitudinal pipe seam causing the pipeline rupture.
| Report Received Date | 2014-05-09 00:00:00 |
|---|---|
| Iyear | 2014 |
| Report Number | 20140049 |
| Supplemental Number | 16569 |
| Report Type | Supplemental Final |
| Operator Id | 31531 PHMSA Enforcement |
| Name | Oneok Westex Transmission, Llc |
| Operator Street Address | 100 West Fifth Street |
| Operator City Name | Tulsa |
| Operator State Abbreviation | OK |
| Operator Postal Code | 74103 |
| Local Datetime | 2014-04-10 04:45:00 |
| Location Latitude | 31.7093 Google Maps OpenStreetMap |
| Location Longitude | -102.57168 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1079337 NRC Report How to search |
| Nrc Rpt Datetime | 2014-04-10 07:10:00 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 45792 |
| Intentional Release | 832 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2014-04-10 07:25:00 |
| Restart Datetime | 2014-04-12 12:00:00 |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2014-04-10 06:30:00 |
| On Site Datetime | 2014-04-10 06:45:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Tx |
| Onshore Postal Code | 79766 |
| Onshore City Name | Odessa |
| Onshore County Name | Ector |
| Designated Location | Milepost |
| Designated Name | 44.49 |
| Pipe Fac Name | Joint Venture |
| Segment Name | 4000-000 |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 48 |
| Crossing | No |
| Pipe Facility Type | Intrastate |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| Item Involved | Pipe |
| Pipe Type | Pipe Seam |
| Pipe Diameter | 20 |
| Pipe Wall Thickness | 0.25 |
| Pipe Smys | 56000 |
| Pipe Specification | Api 5lx |
| Pipe Seam Type | Longitudinal Erw - High Frequency |
| Pipe Manufacturer | American Steel Pipe |
| Pipe Coating Type | Coal Tar |
| Installation Year | 1967 |
| Manufactured Year | 1967 |
| Material Involved | Carbon Steel |
| Release Type | Rupture |
| Rupture Orient | Longitudinal |
| Rupture Length | 588 |
| Rupture Width | 20 |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 426 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 213388 |
| Est Cost Intentional Release | 3843 |
| Est Cost Prop Damage | 82800 |
| Est Cost Emergency | 0 |
| Est Cost Other | 0 |
| Prpty | 300031 |
| Accident Psig | 943 |
| Mop Psig | 953 |
| 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 | Manual |
| Length Segment Isolated | 103963 |
| Internal Inspection Ind | Yes |
| Operation Complications Ind | No |
| Pipeline Function | Transmission System |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | Yes |
| Scada Conf Ind | Yes |
| Accident Identifier | Controller |
| Operator Type | Operator Employee |
| 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 control room was monitoring an inline inspection for an approximately 66 mile segment and the run was approximately 3 miles from completion. The control room recognized a problem and was working with field personnel to identify the cause when a call from the public was received. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Material Failure Of Pipe Or Weld |
| Cause Details | Design-, Construction-, Installation-, Or Fabrication-Related |
| Pwjf Failure Type | Design-, Construction-, Installation-, Or Fabrication-Related |
| Other Analysis Ind | Yes |
| Other Analysis Details | Third Party Failure Analysis |
| Other Factor | Yes |
| Other Factor Details | Girth Weld Anomaly |
| Additional Lack Fusion Ind | Yes |
| Pwf Additional Other Ind | Yes |
| Additional Other Details | Fatigue |
| Collected Data Ind | Yes |
| Axial Magnetic Flx Lkg Ind | Yes |
| Geometry Deformation Ind | Yes |
| Axial Recent Year | 2005 |
| Geometry Recent Year | 2005 |
| Has Hydrtst Conduc Before Ind | No |
| Direct Asmnt Conducted | No |
| Non Destructive Exam Ind | No |
| Preparer Name | P**** F*** |
| Preparer Title | Senior Pipeline Safety Engineer |
| Preparer Email | P*********@o****.com |
| Preparer Telephone | 918 588 7131 |
| Preparer Fax | 918 732 1311 |
| Authorizer Name | W***** R* D***** |
| Authorizer Title | Vice President |
| Authorizer Telephone | 918 588 7424 |
| Authorizer Email | W************@o****.com |
| Narrative | At approximately 0450 hours on april 10, 2014, oneok westex transmission (owt) gas control noticed a drop in line pressure at the dora roberts compressor station. Operations personnel were dispatched at 0500 hours to locate the possible leak. Gas control did receive a call at 0630 hours from the public reporting blowing gas in a rural area approximately 6 miles south of penwell, tx and 1/2 mile east of road fm 1601 in ector county. Owt personnel were directed to this site and were able to identify the source of blowing gas as owt line 4000-000, commonly known as the jv or joint venture line. Block valves upstream and downstream of the site were manually closed by 0725 hours and the isolated section of the pipeline was allowed to blow down to atmospheric pressure. The site is rural and there were no buildings intended for human occupancy within 1/2 mile of the site. Local emergency responders were on site when owt personnel arrived at 0645 hours. There was no fire or explosion due to the release. The pipe that failed was secured and sent to a lab in tulsa, ok to determine the cause of the failure. Update: the failure analysis performed by element labs in tulsa, ok concluded that the cause of the failure was an initial ductile failure of a field made girth weld which initiated the failure of the adjoining pipe joint long seam. The third party failure analysis indicated the cause of the girth weld failure was an approximately one quarter inch diameter void located at the location of an adjoining longitudinal pipe joint seam. This girth weld also had areas of incomplete fusion and failed due to ductile overload in the vicinity of the void. Signs of fatigue were also observed on the girth weld failure surfaces along areas of incomplete fusion. When the girth weld failed, the crack propagated into the longitudinal seam and then by rapid brittle fracture, it proceeded down the length of the longitudinal pipe seam causing the pipeline rupture. |
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