Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2016-10-13 — OK
Operator
Williams Field Services
Cause
Equipment Failure
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)
$200
Incident datetime
2016-10-13 10:30
Report number
Location
OK
Narrative
Op tech observed a leak on flange while conducting routine site rounds. Following observation the op. Tech contacted pipeline control and they proceeded to reduce pipeline flow to 0 flow was established. After zero flow was established. Leak was isolated by closing upstream and downstream valves. Loto was performed, section of pipe was depressurized to zero psi, and insulating flange gasket was replaced. Equipment failure found to be caused by incorrect installation and excessive vibration. The skid vibration survey completed found no high level vibration that would present integrity issues. Therefore the major cause of failure is believed to be improper installation, specifically there was evidence of improper torque during installation. The gasket had been in service for five years. Gasket failure was ultimately the result of fracturing in the surrounding composite disk due to the application of a compressive force beyond the strength of the disk. The oppl team was trained on procedure "40 05 41c bolt tensioning for standard flanged connections"
Detailed record list
Report Received Date
2016-11-04 00:00:00
Iyear
2016
Report Number
20160363
Supplemental Number
23199
Report Type
Supplemental Final
Operator Id
30826
Name
Williams Field Services
Operator Street Address
One Williams Center Wrc-3
Operator City Name
Tulsa
Operator State Abbreviation
OK
Operator Postal Code
74172
Local Datetime
2016-10-13 10:30:00
Location Latitude
40.858546
Location Longitude
-104.428739
Commodity Released Type
Hvl Or Other Flammable Or Toxic Fluid Which Is A Gas At Ambient Conditions
Commodity Subtype
Lpg (Liquefied Petroleum Gas) / Ngl (Natural Gas Liquid)
Unintentional Release Bbls
1.58
Intentional Release Bbls
0
Recovered Bbls
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Local Operating Personnel, Including Contractors
Operator Type
Operator Employee
Incident Identified Datetime
2016-10-13 10:30:00
System Part Involved
Onshore Pipeline, Including Valve Sites
On Off Shore
Onshore
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2016-10-13 10:30:00
Restart Datetime
2016-10-13 19:30:00
On Site Datetime
2016-10-13 10:30:00
Nrc Rpt Num
Nrc Notification Not Required
Ignite Ind
No
Explode Ind
No
Upstream Valve Type Ind
Manual
Downstream Valve Type Ind
Manual
Num Pub Evacuated
0
Pipe Fac Name
Bakken Meter Station
Onshore State Abbreviation
Co
Onshore Postal Code
80729
Onshore City Name
Grover
Onshore County Name
Weld
Designated Location
Milepost/valve Station
Designated Name
358
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Aboveground
Incident Area Subtype
Typical Aboveground Facility Piping Or Appurtenance
Crossing
No
Pipe Facility Type
Interstate
Item Involved
Flange Assembly
Installation Year
2013
Material Involved
Material Other Than Carbon Steel
Material Details
Insulating Gasket
Release Type
Leak
Leak Type
Connection Failure
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
0
Est Cost Prop Damage
200
Est Cost Emergency
0
Est Cost Environmental
0
Est Cost Other
0
Prpty
200
Accident Psig
900
Mop Psig
1575
Accident Pressure
Pressure Did Not Exceed Mop
Pressure Restriction Ind
No
Length Segment Isolated
300
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
No
Scada Conf Ind
No
Cpm In Place Ind
Yes
Cpm Operating Ind
Yes
Cpm Functional Ind
Yes
Cpm Detection Ind
No
Cpm Conf Ind
Yes
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
Incident was not the result of control room issues because the failure was a failed gasket.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Equipment Failure
Cause Details
Non-Threaded Connection Failure
Eq Failure Type
Non-Threaded Connection Failure
Other Non Threaded Ind
Gasket
Additional Vibration Ind
Yes
Additional Installation Ind
Yes
Preparer Name
J*** K******
Preparer Title
Pipeline Safety Engineer
Preparer Email
J***********@w*******.com
Preparer Telephone
801-584-6261
Prepared Date
2018-03-01 00:00:00
Authorizer Name
J**** L******
Authorizer Telephone
801-584-6657
Authorizer Title
Pipeline Safety Manager
Authorizer Email
J************@w*******.com
Narrative
Op tech observed a leak on flange while conducting routine site rounds. Following observation the op. Tech contacted pipeline control and they proceeded to reduce pipeline flow to 0 flow was established. After zero flow was established. Leak was isolated by closing upstream and downstream valves. Loto was performed, section of pipe was depressurized to zero psi, and insulating flange gasket was replaced. Equipment failure found to be caused by incorrect installation and excessive vibration. The skid vibration survey completed found no high level vibration that would present integrity issues. Therefore the major cause of failure is believed to be improper installation, specifically there was evidence of improper torque during installation. The gasket had been in service for five years. Gasket failure was ultimately the result of fracturing in the surrounding composite disk due to the application of a compressive force beyond the strength of the disk. The oppl team was trained on procedure "40 05 41c bolt tensioning for standard flanged connections"
| Report Received Date | 2016-11-04 00:00:00 |
|---|---|
| Iyear | 2016 |
| Report Number | 20160363 |
| Supplemental Number | 23199 |
| Report Type | Supplemental Final |
| Operator Id | 30826 PHMSA Enforcement |
| Name | Williams Field Services |
| Operator Street Address | One Williams Center Wrc-3 |
| Operator City Name | Tulsa |
| Operator State Abbreviation | OK |
| Operator Postal Code | 74172 |
| Local Datetime | 2016-10-13 10:30:00 |
| Location Latitude | 40.858546 Google Maps OpenStreetMap |
| Location Longitude | -104.428739 Google Maps OpenStreetMap |
| Commodity Released Type | Hvl Or Other Flammable Or Toxic Fluid Which Is A Gas At Ambient Conditions |
| Commodity Subtype | Lpg (Liquefied Petroleum Gas) / Ngl (Natural Gas Liquid) |
| Unintentional Release Bbls | 1.58 |
| Intentional Release Bbls | 0 |
| Recovered Bbls | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Local Operating Personnel, Including Contractors |
| Operator Type | Operator Employee |
| Incident Identified Datetime | 2016-10-13 10:30:00 |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| On Off Shore | Onshore |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2016-10-13 10:30:00 |
| Restart Datetime | 2016-10-13 19:30:00 |
| On Site Datetime | 2016-10-13 10:30:00 |
| Nrc Rpt Num | Nrc Notification Not Required 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 Meter Station |
| Onshore State Abbreviation | Co |
| Onshore Postal Code | 80729 |
| Onshore City Name | Grover |
| Onshore County Name | Weld |
| Designated Location | Milepost/valve Station |
| Designated Name | 358 |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Aboveground |
| Incident Area Subtype | Typical Aboveground Facility Piping Or Appurtenance |
| Crossing | No |
| Pipe Facility Type | Interstate |
| Item Involved | Flange Assembly |
| Installation Year | 2013 |
| Material Involved | Material Other Than Carbon Steel |
| Material Details | Insulating Gasket |
| Release Type | Leak |
| Leak Type | Connection Failure |
| 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 | 0 |
| Est Cost Prop Damage | 200 |
| Est Cost Emergency | 0 |
| Est Cost Environmental | 0 |
| Est Cost Other | 0 |
| Prpty | 200 |
| Accident Psig | 900 |
| Mop Psig | 1575 |
| Accident Pressure | Pressure Did Not Exceed Mop |
| Pressure Restriction Ind | No |
| Length Segment Isolated | 300 |
| 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 | No |
| Scada Conf Ind | No |
| Cpm In Place Ind | Yes |
| Cpm Operating Ind | Yes |
| Cpm Functional Ind | Yes |
| Cpm Detection Ind | No |
| Cpm Conf Ind | Yes |
| 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 | Incident was not the result of control room issues because the failure was a failed gasket. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Equipment Failure |
| Cause Details | Non-Threaded Connection Failure |
| Eq Failure Type | Non-Threaded Connection Failure |
| Other Non Threaded Ind | Gasket |
| Additional Vibration Ind | Yes |
| Additional Installation Ind | Yes |
| Preparer Name | J*** K****** |
| Preparer Title | Pipeline Safety Engineer |
| Preparer Email | J***********@w*******.com |
| Preparer Telephone | 801-584-6261 |
| Prepared Date | 2018-03-01 00:00:00 |
| Authorizer Name | J**** L****** |
| Authorizer Telephone | 801-584-6657 |
| Authorizer Title | Pipeline Safety Manager |
| Authorizer Email | J************@w*******.com |
| Narrative | Op tech observed a leak on flange while conducting routine site rounds. Following observation the op. Tech contacted pipeline control and they proceeded to reduce pipeline flow to 0 flow was established. After zero flow was established. Leak was isolated by closing upstream and downstream valves. Loto was performed, section of pipe was depressurized to zero psi, and insulating flange gasket was replaced. Equipment failure found to be caused by incorrect installation and excessive vibration. The skid vibration survey completed found no high level vibration that would present integrity issues. Therefore the major cause of failure is believed to be improper installation, specifically there was evidence of improper torque during installation. The gasket had been in service for five years. Gasket failure was ultimately the result of fracturing in the surrounding composite disk due to the application of a compressive force beyond the strength of the disk. The oppl team was trained on procedure "40 05 41c bolt tensioning for standard flanged connections" |
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