Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2017-04-20 — OK
Operator
Oneok Ngl Pipeline, Llc
Cause
Incorrect Operation
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)
$50
Incident datetime
2017-04-20 17:34
Report number
Location
OK
Narrative
On 4/20/2017, oneok crews removed the pig trap closure assembly to install a barrel extension to receive an inline inspection (ili) tool on the oneok- chico pipeline located at the enlink- bridgeport facility. The assembly (flange welded to thread on closure door) had been unbolted and set to the side. After receiving the tool, the closure door assembly was re-installed on the pipeline pig trap, at approximately 13:30, without the closure door ever being opened. The pig trap was purge with hydrocarbons and returned to normal service. At approximately 17:30 onsite enlink operations personnel contacted the oneok pipeline control center to notify of vapors releasing from the oneok chico pipeline pig trap. Oneok field employees were dispatched to the location and isolated the pig trap. Oneok employee's discovered the o-ring on the pig trap closure door had failed and allowed product to escape. A new o-ring was installed and the pig trap returned to service. Oneok inline inspection tool receiving procedure has been amended to include the inspection of the o-ring on the existing pig trap door, even if the door had not been opened but the closure assembly was removed to receive the ili tool. 17/05/17 updated part c, #6 to "leak" -- per direction of PHMSA - alex colletti - nj
Detailed record list
Report Received Date
2017-05-16 00:00:00
Iyear
2017
Report Number
20170164
Supplemental Number
22338
Report Type
Supplemental Final
Operator Id
32109
Name
Oneok Ngl Pipeline, Llc
Operator Street Address
100 West Fifth Street
Operator City Name
Tulsa
Operator State Abbreviation
OK
Operator Postal Code
74103
Local Datetime
2017-04-20 17:34:00
Location Latitude
33.194389
Location Longitude
-97.805896
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
22
Intentional Release Bbls
0
Recovered Bbls
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Other
Accident Details
Enlink Plant Operator
Incident Identified Datetime
2017-04-20 17:34:00
System Part Involved
Onshore Pipeline, Including Valve Sites
On Off Shore
Onshore
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2017-04-20 18:52:00
Restart Datetime
2017-04-20 21:09:00
On Site Datetime
2017-04-20 19:20:00
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
Oneok Pig Trap At Enlink Bridgeport Gas Plant
Segment Name
Oneok Wtxlpg Chico Lateral (Index #20601)
Onshore State Abbreviation
Tx
Onshore Postal Code
76426
Onshore City Name
Not Within A Municipality
Onshore County Name
Wise
Designated Location
Milepost/valve Station
Designated Name
Pig Trap
Federal
No
Location Type
Totally Contained On Operator-Controlled Property
Incident Area Type
Aboveground
Incident Area Subtype
Typical Aboveground Facility Piping Or Appurtenance
Crossing
No
Pipe Facility Type
Interstate
Item Involved
Scraper/pig Trap
Installation Year
2016
Material Involved
Material Other Than Carbon Steel
Material Details
Viton O-Ring
Release Type
Leak
Leak Type
Seal Or Packing
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
850
Est Cost Prop Damage
50
Est Cost Emergency
500
Est Cost Environmental
0
Est Cost Other
0
Prpty
1400
Accident Psig
700
Mop Psig
1390
Accident Pressure
Pressure Did Not Exceed Mop
Pressure Restriction Ind
No
Length Segment Isolated
8
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
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
Oneok controller's had not performed any actions at this location.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Incorrect Operation
Cause Details
Other Incorrect Operation
Operation Type
Other Incorrect Operation
Operation Details
Existing Oneok Procedure For Receiving An Inline Inspection Tool Did Not Include Information Regarding Inspection Of The O-Ring On The Existing Closure Assembly If The Closure Assembly Door Had Not Been Opened. Oneok Procedure Has Been Amended To Include Inspection Of O-Ring On Pig Trap Closure Assembly Doors Even If The Door Was Not Opened.
Related Inadequate Proc Ind
Yes
Category Type
Routine Maintenance
Operator Qualification Ind
Yes
Qualified Individuals
Yes, They Were Qualified For The Task(S)
Preparer Name
N*** J****
Preparer Title
Requlatory Compliance Supervisor
Preparer Email
N*********@o****.com
Preparer Telephone
580-395-6304
Preparer Fax
580-395-2933
Prepared Date
2017-05-17 00:00:00
Authorizer Name
N*** J****
Authorizer Telephone
580-395-6304
Authorizer Title
Regulatory Compliance Supervisor
Authorizer Email
N*********@o****.com
Narrative
On 4/20/2017, oneok crews removed the pig trap closure assembly to install a barrel extension to receive an inline inspection (ili) tool on the oneok- chico pipeline located at the enlink- bridgeport facility. The assembly (flange welded to thread on closure door) had been unbolted and set to the side. After receiving the tool, the closure door assembly was re-installed on the pipeline pig trap, at approximately 13:30, without the closure door ever being opened. The pig trap was purge with hydrocarbons and returned to normal service. At approximately 17:30 onsite enlink operations personnel contacted the oneok pipeline control center to notify of vapors releasing from the oneok chico pipeline pig trap. Oneok field employees were dispatched to the location and isolated the pig trap. Oneok employee's discovered the o-ring on the pig trap closure door had failed and allowed product to escape. A new o-ring was installed and the pig trap returned to service. Oneok inline inspection tool receiving procedure has been amended to include the inspection of the o-ring on the existing pig trap door, even if the door had not been opened but the closure assembly was removed to receive the ili tool. 17/05/17 updated part c, #6 to "leak" -- per direction of PHMSA - alex colletti - nj
| Report Received Date | 2017-05-16 00:00:00 |
|---|---|
| Iyear | 2017 |
| Report Number | 20170164 |
| Supplemental Number | 22338 |
| Report Type | Supplemental Final |
| Operator Id | 32109 PHMSA Enforcement |
| Name | Oneok Ngl Pipeline, Llc |
| Operator Street Address | 100 West Fifth Street |
| Operator City Name | Tulsa |
| Operator State Abbreviation | OK |
| Operator Postal Code | 74103 |
| Local Datetime | 2017-04-20 17:34:00 |
| Location Latitude | 33.194389 Google Maps OpenStreetMap |
| Location Longitude | -97.805896 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 | 22 |
| Intentional Release Bbls | 0 |
| Recovered Bbls | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Other |
| Accident Details | Enlink Plant Operator |
| Incident Identified Datetime | 2017-04-20 17:34:00 |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| On Off Shore | Onshore |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2017-04-20 18:52:00 |
| Restart Datetime | 2017-04-20 21:09:00 |
| On Site Datetime | 2017-04-20 19:20:00 |
| 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 | Oneok Pig Trap At Enlink Bridgeport Gas Plant |
| Segment Name | Oneok Wtxlpg Chico Lateral (Index #20601) |
| Onshore State Abbreviation | Tx |
| Onshore Postal Code | 76426 |
| Onshore City Name | Not Within A Municipality |
| Onshore County Name | Wise |
| Designated Location | Milepost/valve Station |
| Designated Name | Pig Trap |
| Federal | No |
| Location Type | Totally Contained On Operator-Controlled Property |
| Incident Area Type | Aboveground |
| Incident Area Subtype | Typical Aboveground Facility Piping Or Appurtenance |
| Crossing | No |
| Pipe Facility Type | Interstate |
| Item Involved | Scraper/pig Trap |
| Installation Year | 2016 |
| Material Involved | Material Other Than Carbon Steel |
| Material Details | Viton O-Ring |
| Release Type | Leak |
| Leak Type | Seal Or Packing |
| 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 | 850 |
| Est Cost Prop Damage | 50 |
| Est Cost Emergency | 500 |
| Est Cost Environmental | 0 |
| Est Cost Other | 0 |
| Prpty | 1400 |
| Accident Psig | 700 |
| Mop Psig | 1390 |
| Accident Pressure | Pressure Did Not Exceed Mop |
| Pressure Restriction Ind | No |
| Length Segment Isolated | 8 |
| 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 | 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 | Oneok controller's had not performed any actions at this location. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Incorrect Operation |
| Cause Details | Other Incorrect Operation |
| Operation Type | Other Incorrect Operation |
| Operation Details | Existing Oneok Procedure For Receiving An Inline Inspection Tool Did Not Include Information Regarding Inspection Of The O-Ring On The Existing Closure Assembly If The Closure Assembly Door Had Not Been Opened. Oneok Procedure Has Been Amended To Include Inspection Of O-Ring On Pig Trap Closure Assembly Doors Even If The Door Was Not Opened. |
| Related Inadequate Proc Ind | Yes |
| Category Type | Routine Maintenance |
| Operator Qualification Ind | Yes |
| Qualified Individuals | Yes, They Were Qualified For The Task(S) |
| Preparer Name | N*** J**** |
| Preparer Title | Requlatory Compliance Supervisor |
| Preparer Email | N*********@o****.com |
| Preparer Telephone | 580-395-6304 |
| Preparer Fax | 580-395-2933 |
| Prepared Date | 2017-05-17 00:00:00 |
| Authorizer Name | N*** J**** |
| Authorizer Telephone | 580-395-6304 |
| Authorizer Title | Regulatory Compliance Supervisor |
| Authorizer Email | N*********@o****.com |
| Narrative | On 4/20/2017, oneok crews removed the pig trap closure assembly to install a barrel extension to receive an inline inspection (ili) tool on the oneok- chico pipeline located at the enlink- bridgeport facility. The assembly (flange welded to thread on closure door) had been unbolted and set to the side. After receiving the tool, the closure door assembly was re-installed on the pipeline pig trap, at approximately 13:30, without the closure door ever being opened. The pig trap was purge with hydrocarbons and returned to normal service. At approximately 17:30 onsite enlink operations personnel contacted the oneok pipeline control center to notify of vapors releasing from the oneok chico pipeline pig trap. Oneok field employees were dispatched to the location and isolated the pig trap. Oneok employee's discovered the o-ring on the pig trap closure door had failed and allowed product to escape. A new o-ring was installed and the pig trap returned to service. Oneok inline inspection tool receiving procedure has been amended to include the inspection of the o-ring on the existing pig trap door, even if the door had not been opened but the closure assembly was removed to receive the ili tool. 17/05/17 updated part c, #6 to "leak" -- per direction of PHMSA - alex colletti - nj |
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