Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2019-07-02 — CO
Operator
Markwest Utica Emg, L.l.c.
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)
$20
Incident datetime
2019-07-02 18:30
Report number
Location
CO
Narrative
Explanation: this line was shut in due to no flow in february 2019. When shut in the line was pulled from a normal operating pressure of 500-600 psi down to 300 psi. As the ground temperature increased through the spring and summer causing the line to pressure up from 300 psi to just over 800 psi. While well below the 2200 psi mop the line was built and hydro tested to, it is a higher pressure than the line has seen since it was commissioned. When the line reached 803 psi a 3/8" stainless steel swagelok tubing fitting, on the pig trap inside our cadiz processing plant, came apart and released ethane. All the ethane released instantly flashed to vapor, no liquids were spilled on the ground. This release continued for approximately 4 minutes until operations personal could get to the pig trap to shut in the leaking fitting. After investigation it was determined that the ferrule on the 3/8" stainless steel tubing fitting was not properly set when it was installed prior to commissioning in 2015. Since discovery all stainless steel tubing fittings throughout the system piping have been checked for proper installation with a swagelok go/no-go gauge which ensures proper installation. No other fitting connection issues were identified.
Detailed record list
Report Received Date
2019-07-31 00:00:00
Iyear
2019
Report Number
20190238
Supplemental Number
33855
Report Type
Supplemental Final
Operator Id
39941
Name
Markwest Utica Emg, L.l.c.
Operator Street Address
1515 Arapahoe Street Tower 1, Suite 1600
Operator City Name
Denver
Operator State Abbreviation
CO
Operator Postal Code
80202
Local Datetime
2019-07-02 18:30:00
Location Latitude
40.25565
Location Longitude
-81.02988
Commodity Released Type
Hvl Or Other Flammable Or Toxic Fluid Which Is A Gas At Ambient Conditions
Commodity Subtype
Other Hvl
Commodity Details
Ethane
Unintentional Release Bbls
16.71
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
2019-07-02 18:30:00
System Part Involved
Onshore Pump/meter Station Equipment And Piping
On Off Shore
Onshore
Shutdown Due Accident Ind
No
Shutdown Explain
The Pipeline Was Not In Service. It Was Sitting Idle
On Site Datetime
2019-07-02 18:31:00
Nrc Rpt Datetime
2019-07-02 19:03:00
Nrc Rpt Num
1250797
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Pipe Fac Name
Cadiz Plant
Segment Name
Seneca To Cadiz 10" Ethane
Onshore State Abbreviation
Oh
Onshore Postal Code
43907
Onshore City Name
Cadiz
Onshore County Name
Harrison
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
Intrastate
Item Involved
Tubing
Installation Year
2015
Material Involved
Material Other Than Carbon Steel
Material Details
Stainless Tubing
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
295
Est Cost Prop Damage
20
Est Cost Emergency
300
Est Cost Environmental
0
Est Cost Other
0
Est Cost Other Details
702 Gallons Were Released As Vapor At Only $.42 A Gallon.
Prpty
615
Accident Psig
803
Mop Psig
2200
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
No
Scada Functional Ind
No
Scada Detection Ind
No
Scada Conf Ind
No
Cpm In Place 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
The tubing fitting at the plant failed releasing ethane which was observed by plant personnel who immediately isolated the leak.
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
Other
Other Stripped Details
3/8" Threaded Swagelok Tubing Ferrule Nut
Additional Installation Ind
Yes
Preparer Name
T*** M********
Preparer Title
Pipeline Compliance Supervisor
Preparer Email
T*********@m****************.com
Preparer Telephone
303-489-3275
Prepared Date
2020-06-04 00:00:00
Authorizer Name
D***** T******
Authorizer Telephone
303-531-9089
Authorizer Title
Engineering Mgr
Authorizer Email
D*******@m****************.com
Narrative
Explanation: this line was shut in due to no flow in february 2019. When shut in the line was pulled from a normal operating pressure of 500-600 psi down to 300 psi. As the ground temperature increased through the spring and summer causing the line to pressure up from 300 psi to just over 800 psi. While well below the 2200 psi mop the line was built and hydro tested to, it is a higher pressure than the line has seen since it was commissioned. When the line reached 803 psi a 3/8" stainless steel swagelok tubing fitting, on the pig trap inside our cadiz processing plant, came apart and released ethane. All the ethane released instantly flashed to vapor, no liquids were spilled on the ground. This release continued for approximately 4 minutes until operations personal could get to the pig trap to shut in the leaking fitting. After investigation it was determined that the ferrule on the 3/8" stainless steel tubing fitting was not properly set when it was installed prior to commissioning in 2015. Since discovery all stainless steel tubing fittings throughout the system piping have been checked for proper installation with a swagelok go/no-go gauge which ensures proper installation. No other fitting connection issues were identified.
| Report Received Date | 2019-07-31 00:00:00 |
|---|---|
| Iyear | 2019 |
| Report Number | 20190238 |
| Supplemental Number | 33855 |
| Report Type | Supplemental Final |
| Operator Id | 39941 PHMSA Enforcement |
| Name | Markwest Utica Emg, L.l.c. |
| Operator Street Address | 1515 Arapahoe Street Tower 1, Suite 1600 |
| Operator City Name | Denver |
| Operator State Abbreviation | CO |
| Operator Postal Code | 80202 |
| Local Datetime | 2019-07-02 18:30:00 |
| Location Latitude | 40.25565 Google Maps OpenStreetMap |
| Location Longitude | -81.02988 Google Maps OpenStreetMap |
| Commodity Released Type | Hvl Or Other Flammable Or Toxic Fluid Which Is A Gas At Ambient Conditions |
| Commodity Subtype | Other Hvl |
| Commodity Details | Ethane |
| Unintentional Release Bbls | 16.71 |
| 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 | 2019-07-02 18:30:00 |
| System Part Involved | Onshore Pump/meter Station Equipment And Piping |
| On Off Shore | Onshore |
| Shutdown Due Accident Ind | No |
| Shutdown Explain | The Pipeline Was Not In Service. It Was Sitting Idle |
| On Site Datetime | 2019-07-02 18:31:00 |
| Nrc Rpt Datetime | 2019-07-02 19:03:00 |
| Nrc Rpt Num | 1250797 NRC Report How to search |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Cadiz Plant |
| Segment Name | Seneca To Cadiz 10" Ethane |
| Onshore State Abbreviation | Oh |
| Onshore Postal Code | 43907 |
| Onshore City Name | Cadiz |
| Onshore County Name | Harrison |
| 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 | Intrastate |
| Item Involved | Tubing |
| Installation Year | 2015 |
| Material Involved | Material Other Than Carbon Steel |
| Material Details | Stainless Tubing |
| 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 | 295 |
| Est Cost Prop Damage | 20 |
| Est Cost Emergency | 300 |
| Est Cost Environmental | 0 |
| Est Cost Other | 0 |
| Est Cost Other Details | 702 Gallons Were Released As Vapor At Only $.42 A Gallon. |
| Prpty | 615 |
| Accident Psig | 803 |
| Mop Psig | 2200 |
| 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 | No |
| Scada Functional Ind | No |
| Scada Detection Ind | No |
| Scada Conf Ind | No |
| Cpm In Place 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 | The tubing fitting at the plant failed releasing ethane which was observed by plant personnel who immediately isolated the leak. |
| 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 | Other |
| Other Stripped Details | 3/8" Threaded Swagelok Tubing Ferrule Nut |
| Additional Installation Ind | Yes |
| Preparer Name | T*** M******** |
| Preparer Title | Pipeline Compliance Supervisor |
| Preparer Email | T*********@m****************.com |
| Preparer Telephone | 303-489-3275 |
| Prepared Date | 2020-06-04 00:00:00 |
| Authorizer Name | D***** T****** |
| Authorizer Telephone | 303-531-9089 |
| Authorizer Title | Engineering Mgr |
| Authorizer Email | D*******@m****************.com |
| Narrative | Explanation: this line was shut in due to no flow in february 2019. When shut in the line was pulled from a normal operating pressure of 500-600 psi down to 300 psi. As the ground temperature increased through the spring and summer causing the line to pressure up from 300 psi to just over 800 psi. While well below the 2200 psi mop the line was built and hydro tested to, it is a higher pressure than the line has seen since it was commissioned. When the line reached 803 psi a 3/8" stainless steel swagelok tubing fitting, on the pig trap inside our cadiz processing plant, came apart and released ethane. All the ethane released instantly flashed to vapor, no liquids were spilled on the ground. This release continued for approximately 4 minutes until operations personal could get to the pig trap to shut in the leaking fitting. After investigation it was determined that the ferrule on the 3/8" stainless steel tubing fitting was not properly set when it was installed prior to commissioning in 2015. Since discovery all stainless steel tubing fittings throughout the system piping have been checked for proper installation with a swagelok go/no-go gauge which ensures proper installation. No other fitting connection issues were identified. |
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