Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2024-12-23 — TX
Operator
Copano Ngl Services 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)
$203,000
Incident datetime
2024-12-23 00:00 UTC
Report number
Location
TX
Narrative
On november 11, 2024, copano field personnel discovered a small patch of ice at mlv-1 and heard a "leaking" sound while completing routine valve maintenance. The "cop6-brenham" line was promptly isolated and the remaining product in the line was flared to start repairs. A fatigued flange gasket on an underground valve was determined to be the cause of the leak at mlv-1. Repairs included installing a new spiral wound 304 stainless gasket on mlv-1. The ngl line was returned to service on november 22, 2024.
Detailed record list
Report Received Date
2024-12-23 00:00:00
Iyear
2024
Report Number
20240297
Supplemental Number
40484
Report Type
Supplemental Final
Operator Id
32114
Name
Copano Ngl Services Llc
Operator Street Address
1001 Louisiana St, Suite 1000
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77002
Time Zone
Central
Daylight Savings Ind
Yes
Location Latitude
29.693369
Location Longitude
-96.642615
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
0.1
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
System Part Involved
Onshore Pipeline, Including Valve Sites
On Off Shore
Onshore
Status When Identified
Normal Operation, Includes Pauses Between Batches And During Maintenance
Shutdown Due Accident Ind
Yes
Communication State Fed Ind
No
Nrc Rpt Num
1416081
Additional Nrc Report Numbers
1416212
Ignite Ind
No
Upstream Action Taken
Operational Control
Upstream Oprtnl Cntrl Detail
Isolation Of Affected Segment By Shutting In The System Initially.
Downstream Action Taken
Operational Control
Downstream Oprtnl Cntrl Detail
Isolation Of Affected Segment By Shutting In The System Initially.
Num Pub Evacuated
0
Pipe Fac Name
Copano
Segment Name
Cop6-Brenham
Onshore State Abbreviation
Tx
Onshore Postal Code
78934
Onshore City Name
Not Within A Municipality
Onshore County Name
Colorado
Designated Location
Survey Station No.
Designated Name
Sta 82473.03
Federal
No
Location Type
Totally Contained On Operator-Controlled Property
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
96
Crossing
No
Pipe Facility Type
Intrastate
Item Involved
Flange Assembly
Installation Year
1987
Manufactured Year
Unknown
Material Involved
Material Other Than Carbon Steel
Material Details
Cellulose Fiber Base Gasket
Release Type
Leak
Leak Type
Other
Leak Type Other
Gasket Outside Of Valve Body
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
85000
Est Cost Prop Damage
203000
Est Cost Emergency
0
Est Cost Environmental
0
Est Cost Other
0
Prpty
288000
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
0
Num Business Building Affctd
0
Accident Psig
786
Mop Psig
1440
Mop Cfr Section
Component Design Pressure �195.406(A)(2)
Maop Established Date
1987-01-01 00:00:00
Maop Reversal Flow Ind
No
Accident Pressure
Pressure Did Not Exceed Mop
Pressure Restriction Ind
No
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
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
Cr or controller actions did not contribute to gasket failure.
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
Eq Additional Other Ind
Yes
Eq Additional Other Details
Gasket Material Fatigue Due To Age; Original Installation In 1987.
Preparer Name
V*******
Preparer Title
Pipeline Engineer
Preparer Email
V**************@k***********.com
Prepared Date
2025-02-07 00:00:00
Authorizer Name
V*******
Authorizer Telephone
7134202595
Authorizer Title
Pipeline Engineer
Authorizer Email
V**************@k***********.com
Narrative
On november 11, 2024, copano field personnel discovered a small patch of ice at mlv-1 and heard a "leaking" sound while completing routine valve maintenance. The "cop6-brenham" line was promptly isolated and the remaining product in the line was flared to start repairs. A fatigued flange gasket on an underground valve was determined to be the cause of the leak at mlv-1. Repairs included installing a new spiral wound 304 stainless gasket on mlv-1. The ngl line was returned to service on november 22, 2024.
| Report Received Date | 2024-12-23 00:00:00 |
|---|---|
| Iyear | 2024 |
| Report Number | 20240297 |
| Supplemental Number | 40484 |
| Report Type | Supplemental Final |
| Operator Id | 32114 PHMSA Enforcement |
| Name | Copano Ngl Services Llc |
| Operator Street Address | 1001 Louisiana St, Suite 1000 |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77002 |
| Time Zone | Central |
| Daylight Savings Ind | Yes |
| Location Latitude | 29.693369 Google Maps OpenStreetMap |
| Location Longitude | -96.642615 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 | 0.1 |
| 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 |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| On Off Shore | Onshore |
| Status When Identified | Normal Operation, Includes Pauses Between Batches And During Maintenance |
| Shutdown Due Accident Ind | Yes |
| Communication State Fed Ind | No |
| Nrc Rpt Num | 1416081 NRC Report How to search |
| Additional Nrc Report Numbers | 1416212 |
| Ignite Ind | No |
| Upstream Action Taken | Operational Control |
| Upstream Oprtnl Cntrl Detail | Isolation Of Affected Segment By Shutting In The System Initially. |
| Downstream Action Taken | Operational Control |
| Downstream Oprtnl Cntrl Detail | Isolation Of Affected Segment By Shutting In The System Initially. |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Copano |
| Segment Name | Cop6-Brenham |
| Onshore State Abbreviation | Tx |
| Onshore Postal Code | 78934 |
| Onshore City Name | Not Within A Municipality |
| Onshore County Name | Colorado |
| Designated Location | Survey Station No. |
| Designated Name | Sta 82473.03 |
| Federal | No |
| Location Type | Totally Contained On Operator-Controlled Property |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 96 |
| Crossing | No |
| Pipe Facility Type | Intrastate |
| Item Involved | Flange Assembly |
| Installation Year | 1987 |
| Manufactured Year | Unknown |
| Material Involved | Material Other Than Carbon Steel |
| Material Details | Cellulose Fiber Base Gasket |
| Release Type | Leak |
| Leak Type | Other |
| Leak Type Other | Gasket Outside Of Valve Body |
| 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 | 85000 |
| Est Cost Prop Damage | 203000 |
| Est Cost Emergency | 0 |
| Est Cost Environmental | 0 |
| Est Cost Other | 0 |
| Prpty | 288000 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 0 |
| Num Business Building Affctd | 0 |
| Accident Psig | 786 |
| Mop Psig | 1440 |
| Mop Cfr Section | Component Design Pressure �195.406(A)(2) View CFR 49 §192 |
| Maop Established Date | 1987-01-01 00:00:00 |
| Maop Reversal Flow Ind | No |
| Accident Pressure | Pressure Did Not Exceed Mop |
| Pressure Restriction Ind | No |
| 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 | 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 | Cr or controller actions did not contribute to gasket failure. |
| 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 |
| Eq Additional Other Ind | Yes |
| Eq Additional Other Details | Gasket Material Fatigue Due To Age; Original Installation In 1987. |
| Preparer Name | V******* |
| Preparer Title | Pipeline Engineer |
| Preparer Email | V**************@k***********.com |
| Prepared Date | 2025-02-07 00:00:00 |
| Authorizer Name | V******* |
| Authorizer Telephone | 7134202595 |
| Authorizer Title | Pipeline Engineer |
| Authorizer Email | V**************@k***********.com |
| Narrative | On november 11, 2024, copano field personnel discovered a small patch of ice at mlv-1 and heard a "leaking" sound while completing routine valve maintenance. The "cop6-brenham" line was promptly isolated and the remaining product in the line was flared to start repairs. A fatigued flange gasket on an underground valve was determined to be the cause of the leak at mlv-1. Repairs included installing a new spiral wound 304 stainless gasket on mlv-1. The ngl line was returned to service on november 22, 2024. |
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