Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2015-10-01 — OK
Operator
Oneok Westex Transmission, Llc
Cause
Corrosion Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$200,000
Incident datetime
2015-10-01 15:05
Report number
Location
OK
Narrative
On october 1, 2015, the operating pressure on parallel lines 800-000 and 801-000 appeared to the control room operators to be lower than expected. Field operations personnel confirmed gas venting to atmosphere on line 800-000. The pipeline is in a low wet area that has prevented close examination of the failure beyond a single photograph of the pipe before being covered by ground water. Line 800-000 will remain out of service until a repair method has been determined. Line 801-000 will remain in service. Supplemental - the failure site became accessible and the pipeline was repaired by installing a cylinder of tested pipe. External corrosion was confirmed to be the cause of the failure.
Detailed record list
Report Received Date
2015-10-30 00:00:00
Iyear
2015
Report Number
20150129
Supplemental Number
17233
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
2015-10-01 15:05:00
Location Latitude
32.305
Location Longitude
-101.7102
Nrc Rpt Num
1129881
Nrc Rpt Datetime
2015-10-01 15:56:00
Commodity Released Type
Natural Gas
Unintentional Release
3624
Intentional Release
452
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2015-10-01 16:08:00
Still Shutdown Ind
Yes
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Incident Identified Datetime
2015-10-01 15:05:00
On Site Datetime
2015-10-01 15:26:00
On Off Shore
Onshore
Onshore State Abbreviation
Tx
Onshore Postal Code
79782
Onshore City Name
Not Within A Municipality
Onshore County Name
Martin
Designated Location
Milepost
Designated Name
54.00
Pipe Fac Name
800-000
Segment Name
800-000
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
35
Crossing
No
Pipe Facility Type
Intrastate
System Part Involved
Onshore Pipeline, Including Valve Sites
Item Involved
Pipe
Pipe Type
Pipe Body
Pipe Diameter
8
Pipe Wall Thickness
0.22
Pipe Smys
24000
Pipe Specification
Unknown
Pipe Seam Type
Lap Welded
Pipe Manufacturer
Republic Steel
Pipe Coating Type
Coal Tar
Installation Year
1930
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Other
Leak Type Other
4 Inch Dia Corroded Area
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
115
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
10292
Est Cost Intentional Release
1284
Est Cost Prop Damage
200000
Est Cost Emergency
1000
Est Cost Other
0
Prpty
212576
Accident Psig
350
Mop Psig
428
Mop Cfr Section
192.619(C)
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Upstream Valve Type Ind
Manual
Downstream Valve Type Ind
Manual
Length Segment Isolated
51744
Internal Inspection Ind
No
Diameter Change Ind
Yes
Unsuitable Mainline 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
Correct response by control room operators to the situation.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Corrosion Failure
Cause Details
External Corrosion
Internal External
External Corrosion
Visual Exam Results
Localized Pitting
Galvanic Corrosion Ind
Yes
Field Exam Basis Ind
Yes
Underground Location
Yes
Under Cathodic Protection Ind
Yes
Cathodic Survey Type
Yes
Cp Annual Survey Ind
Yes
Cp Annual Survey Year
2015
Prior Damage
No
Collected Data Ind
No
Has Hydrtst Conduc Before Ind
Yes
Hydrtst Most Rcnt Year
1956
Hydrtst Most Rcnt Pressure
420
Direct Asmnt Conducted
No
Non Destructive Exam Ind
No
Preparer Name
P****** V******
Preparer Title
Manager Regulatory Compliance
Preparer Email
P**********@o****.com
Preparer Telephone
918-588-7734
Preparer Fax
918-5915032
Authorizer Name
W** D*****
Authorizer Title
Vp Natural Gas Pipeline Operations
Authorizer Telephone
918-588-7424
Authorizer Email
W************@o****.com
Narrative
On october 1, 2015, the operating pressure on parallel lines 800-000 and 801-000 appeared to the control room operators to be lower than expected. Field operations personnel confirmed gas venting to atmosphere on line 800-000. The pipeline is in a low wet area that has prevented close examination of the failure beyond a single photograph of the pipe before being covered by ground water. Line 800-000 will remain out of service until a repair method has been determined. Line 801-000 will remain in service. Supplemental - the failure site became accessible and the pipeline was repaired by installing a cylinder of tested pipe. External corrosion was confirmed to be the cause of the failure.
| Report Received Date | 2015-10-30 00:00:00 |
|---|---|
| Iyear | 2015 |
| Report Number | 20150129 |
| Supplemental Number | 17233 |
| 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 | 2015-10-01 15:05:00 |
| Location Latitude | 32.305 Google Maps OpenStreetMap |
| Location Longitude | -101.7102 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1129881 NRC Report How to search |
| Nrc Rpt Datetime | 2015-10-01 15:56:00 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 3624 |
| Intentional Release | 452 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2015-10-01 16:08:00 |
| Still Shutdown Ind | Yes |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2015-10-01 15:05:00 |
| On Site Datetime | 2015-10-01 15:26:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Tx |
| Onshore Postal Code | 79782 |
| Onshore City Name | Not Within A Municipality |
| Onshore County Name | Martin |
| Designated Location | Milepost |
| Designated Name | 54.00 |
| Pipe Fac Name | 800-000 |
| Segment Name | 800-000 |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 35 |
| Crossing | No |
| Pipe Facility Type | Intrastate |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Pipe Diameter | 8 |
| Pipe Wall Thickness | 0.22 |
| Pipe Smys | 24000 |
| Pipe Specification | Unknown |
| Pipe Seam Type | Lap Welded |
| Pipe Manufacturer | Republic Steel |
| Pipe Coating Type | Coal Tar |
| Installation Year | 1930 |
| Manufactured Year | Unknown |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Other |
| Leak Type Other | 4 Inch Dia Corroded Area |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 115 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 10292 |
| Est Cost Intentional Release | 1284 |
| Est Cost Prop Damage | 200000 |
| Est Cost Emergency | 1000 |
| Est Cost Other | 0 |
| Prpty | 212576 |
| Accident Psig | 350 |
| Mop Psig | 428 |
| Mop Cfr Section | 192.619(C) 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 | 51744 |
| Internal Inspection Ind | No |
| Diameter Change Ind | Yes |
| Unsuitable Mainline 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 | Correct response by control room operators to the situation. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Corrosion Failure |
| Cause Details | External Corrosion |
| Internal External | External Corrosion |
| Visual Exam Results | Localized Pitting |
| Galvanic Corrosion Ind | Yes |
| Field Exam Basis Ind | Yes |
| Underground Location | Yes |
| Under Cathodic Protection Ind | Yes |
| Cathodic Survey Type | Yes |
| Cp Annual Survey Ind | Yes |
| Cp Annual Survey Year | 2015 |
| Prior Damage | No |
| Collected Data Ind | No |
| Has Hydrtst Conduc Before Ind | Yes |
| Hydrtst Most Rcnt Year | 1956 |
| Hydrtst Most Rcnt Pressure | 420 |
| Direct Asmnt Conducted | No |
| Non Destructive Exam Ind | No |
| Preparer Name | P****** V****** |
| Preparer Title | Manager Regulatory Compliance |
| Preparer Email | P**********@o****.com |
| Preparer Telephone | 918-588-7734 |
| Preparer Fax | 918-5915032 |
| Authorizer Name | W** D***** |
| Authorizer Title | Vp Natural Gas Pipeline Operations |
| Authorizer Telephone | 918-588-7424 |
| Authorizer Email | W************@o****.com |
| Narrative | On october 1, 2015, the operating pressure on parallel lines 800-000 and 801-000 appeared to the control room operators to be lower than expected. Field operations personnel confirmed gas venting to atmosphere on line 800-000. The pipeline is in a low wet area that has prevented close examination of the failure beyond a single photograph of the pipe before being covered by ground water. Line 800-000 will remain out of service until a repair method has been determined. Line 801-000 will remain in service. Supplemental - the failure site became accessible and the pipeline was repaired by installing a cylinder of tested pipe. External corrosion was confirmed to be the cause of the failure. |
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