Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2019-06-23 — OK
Operator
Oneok Ngl Pipeline, Llc
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)
$500
Incident datetime
2019-06-23 07:01
Report number
Location
OK
Narrative
At approximately 6:58am on 6/23/19 an operator at oneok's mont belvieu storage facility noticed a vapor cloud on the odell pump station camera feed. The operator notified oneok's tulsa pipeline control center of the observation. At 7:01am a oneok operator verified the vapor cloud on-site. The pipeline was shut down and the leak was isolated. After evacuating the line section it was determined that a check valve on thermal tubing for a station valve had failed/broke. The thermal tubing and check valve were replaced and the system was returned to service. The broken check valve has been sent for metallurgy analysis to help determine the cause of the failure. Update: material analysis indicated that the failure was due to low stress high cycle fatigue of the threads of the stainless steel check valve. Supplement 9/10/19: part g apparent cause; malfunction of control/relief valve equipment changed to threaded connection/coupling valve threads due to the threads failing on the check valve and not the actual check failing. Change made at the request of PHMSA investigator.
Detailed record list
Report Received Date
2019-07-19 00:00:00
Iyear
2019
Report Number
20190229
Supplemental Number
32689
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
2019-06-23 06:58:00
Location Latitude
29.867393
Location Longitude
-94.895496
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
97
Intentional Release Bbls
33
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
2019-06-23 07:01:00
System Part Involved
Onshore Pump/meter Station Equipment And Piping
On Off Shore
Onshore
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2019-06-23 07:01:00
Restart Datetime
2019-06-23 15:45:00
On Site Datetime
2019-06-23 07:20:00
Nrc Rpt Num
Nrc Notification Not Required
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Pipe Fac Name
Odell Pump Station
Segment Name
Sterling Ii
Onshore State Abbreviation
Tx
Onshore Postal Code
77580
Onshore City Name
Mont. Belvieu
Onshore County Name
Chambers
Designated Location
Milepost/valve Station
Designated Name
225
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
Relief Line And Relief Equipment
Installation Year
1992
Material Involved
Material Other Than Carbon Steel
Material Details
Stainless Steel
Release Type
Leak
Leak Type
Other
Leak Type Other
Broken 1/2" Check Valve
Wildlife Impact Ind
No
Soil Contamination
No
Long Term Assessment
No
Remediation Ind
No
Water Contam Ind
No
Could Be Hca
Yes
Commodity Reached Hca
Yes
Other Pop Ind
Yes
Other Pop Yes No
Yes
Usa Drinking Ind
Yes
Usa Drinking Yes No
Yes
Est Cost Oper Paid
0
Est Cost Gas Released
5460
Est Cost Prop Damage
500
Est Cost Emergency
5000
Est Cost Environmental
0
Est Cost Other
8000
Est Cost Other Details
Metallurgic Testing On Failed Component
Prpty
18960
Accident Psig
1188
Mop Psig
1440
Accident Pressure
Pressure Did Not Exceed Mop
Pressure Restriction 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
No
Investigation Status
Yes, specify investigation result(s): (select all that apply)
Invest No Control Room Ind
Yes
Invest No Controller Ind
Yes
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Equipment Failure
Cause Details
Threaded Connection/coupling Failure
Eq Failure Type
Threaded Connection/coupling Failure
Other Stripped Ind
Valve Threads
Eq Additional Other Ind
Yes
Eq Additional Other Details
Check Valve Threads Failed Due To Metal Fatigue
Preparer Name
M***** C********
Preparer Title
Regulatory Compliance Specialist
Preparer Email
M***************@o****.com
Preparer Telephone
254-292-8911
Prepared Date
2019-09-10 00:00:00
Authorizer Name
M***** C********
Authorizer Telephone
254-292-8911
Authorizer Title
Regulatory Compliance Specialist
Authorizer Email
M***************@o****.com
Narrative
At approximately 6:58am on 6/23/19 an operator at oneok's mont belvieu storage facility noticed a vapor cloud on the odell pump station camera feed. The operator notified oneok's tulsa pipeline control center of the observation. At 7:01am a oneok operator verified the vapor cloud on-site. The pipeline was shut down and the leak was isolated. After evacuating the line section it was determined that a check valve on thermal tubing for a station valve had failed/broke. The thermal tubing and check valve were replaced and the system was returned to service. The broken check valve has been sent for metallurgy analysis to help determine the cause of the failure. Update: material analysis indicated that the failure was due to low stress high cycle fatigue of the threads of the stainless steel check valve. Supplement 9/10/19: part g apparent cause; malfunction of control/relief valve equipment changed to threaded connection/coupling valve threads due to the threads failing on the check valve and not the actual check failing. Change made at the request of PHMSA investigator.
| Report Received Date | 2019-07-19 00:00:00 |
|---|---|
| Iyear | 2019 |
| Report Number | 20190229 |
| Supplemental Number | 32689 |
| 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 | 2019-06-23 06:58:00 |
| Location Latitude | 29.867393 Google Maps OpenStreetMap |
| Location Longitude | -94.895496 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 | 97 |
| Intentional Release Bbls | 33 |
| 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 | 2019-06-23 07:01:00 |
| System Part Involved | Onshore Pump/meter Station Equipment And Piping |
| On Off Shore | Onshore |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2019-06-23 07:01:00 |
| Restart Datetime | 2019-06-23 15:45:00 |
| On Site Datetime | 2019-06-23 07:20:00 |
| Nrc Rpt Num | Nrc Notification Not Required NRC Report How to search |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Odell Pump Station |
| Segment Name | Sterling Ii |
| Onshore State Abbreviation | Tx |
| Onshore Postal Code | 77580 |
| Onshore City Name | Mont. Belvieu |
| Onshore County Name | Chambers |
| Designated Location | Milepost/valve Station |
| Designated Name | 225 |
| 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 | Relief Line And Relief Equipment |
| Installation Year | 1992 |
| Material Involved | Material Other Than Carbon Steel |
| Material Details | Stainless Steel |
| Release Type | Leak |
| Leak Type | Other |
| Leak Type Other | Broken 1/2" Check Valve |
| Wildlife Impact Ind | No |
| Soil Contamination | No |
| Long Term Assessment | No |
| Remediation Ind | No |
| Water Contam Ind | No |
| Could Be Hca | Yes |
| Commodity Reached Hca | Yes |
| Other Pop Ind | Yes |
| Other Pop Yes No | Yes |
| Usa Drinking Ind | Yes |
| Usa Drinking Yes No | Yes |
| Est Cost Oper Paid | 0 |
| Est Cost Gas Released | 5460 |
| Est Cost Prop Damage | 500 |
| Est Cost Emergency | 5000 |
| Est Cost Environmental | 0 |
| Est Cost Other | 8000 |
| Est Cost Other Details | Metallurgic Testing On Failed Component |
| Prpty | 18960 |
| Accident Psig | 1188 |
| Mop Psig | 1440 |
| Accident Pressure | Pressure Did Not Exceed Mop |
| Pressure Restriction 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 | No |
| Investigation Status | Yes, specify investigation result(s): (select all that apply) |
| Invest No Control Room Ind | Yes |
| Invest No Controller Ind | Yes |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Equipment Failure |
| Cause Details | Threaded Connection/coupling Failure |
| Eq Failure Type | Threaded Connection/coupling Failure |
| Other Stripped Ind | Valve Threads |
| Eq Additional Other Ind | Yes |
| Eq Additional Other Details | Check Valve Threads Failed Due To Metal Fatigue |
| Preparer Name | M***** C******** |
| Preparer Title | Regulatory Compliance Specialist |
| Preparer Email | M***************@o****.com |
| Preparer Telephone | 254-292-8911 |
| Prepared Date | 2019-09-10 00:00:00 |
| Authorizer Name | M***** C******** |
| Authorizer Telephone | 254-292-8911 |
| Authorizer Title | Regulatory Compliance Specialist |
| Authorizer Email | M***************@o****.com |
| Narrative | At approximately 6:58am on 6/23/19 an operator at oneok's mont belvieu storage facility noticed a vapor cloud on the odell pump station camera feed. The operator notified oneok's tulsa pipeline control center of the observation. At 7:01am a oneok operator verified the vapor cloud on-site. The pipeline was shut down and the leak was isolated. After evacuating the line section it was determined that a check valve on thermal tubing for a station valve had failed/broke. The thermal tubing and check valve were replaced and the system was returned to service. The broken check valve has been sent for metallurgy analysis to help determine the cause of the failure. Update: material analysis indicated that the failure was due to low stress high cycle fatigue of the threads of the stainless steel check valve. Supplement 9/10/19: part g apparent cause; malfunction of control/relief valve equipment changed to threaded connection/coupling valve threads due to the threads failing on the check valve and not the actual check failing. Change made at the request of PHMSA investigator. |
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