Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2014-07-25 — TX
Operator
Chevron Midstream Pipelines Llc
Cause
Corrosion 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)
$515,262
Incident datetime
2014-07-25 17:00
Report number
Location
TX
Narrative
During the morning of 24jul14, a routine survey detected an intermitted vapor emitting from a casing vent near la-3127 in taft, la. The vapor has been continually monitored and air samples were collected for analysis. At 1700 cdt on 25jul14, it was confirmed that the slow leak was associated with the propylene pp04 line. The line was blocked in utilizing by means of manual valves. The quantity released was found to below the reportable threshold but repair costs were a cause for reporting. The pipe/leak area was exposed to a atmosphere within the annulus between the casing and the pipe. Air movement between the casing and pipe caused moisture/condensation creating a corrosive atmosphere at the point where coating damage was evident. The smart pig run was not on a 5 year interval due to the fact it was not in a hca and therefore was based on chevron's own analysis to run the tool.
Detailed record list
Report Received Date
2014-08-22 00:00:00
Iyear
2014
Report Number
20140300
Supplemental Number
20272
Report Type
Supplemental Final
Operator Id
31556
Name
Chevron Midstream Pipelines Llc
Operator Street Address
1400 Smith St
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77002
Local Datetime
2014-07-25 17:00:00
Location Latitude
29.976335
Location Longitude
-90.469736
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
0.02
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
2014-07-25 17:00:00
System Part Involved
Onshore Pipeline, Including Valve Sites
On Off Shore
Onshore
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2014-07-25 17:00:00
Restart Datetime
2014-08-15 07:00:00
On Site Datetime
2014-07-25 17:00:00
Nrc Rpt Datetime
2014-07-25 18:59:00
Nrc Rpt Num
1090285
Ignite Ind
No
Explode Ind
No
Upstream Valve Type Ind
Manual
Downstream Valve Type Ind
Manual
Num Pub Evacuated
0
Pipe Fac Name
Pp04
Segment Name
Tends Pipeline System
Onshore State Abbreviation
La
Onshore Postal Code
70057
Onshore City Name
Hahnville
Onshore County Name
St. Charles
Designated Location
Milepost/valve Station
Designated Name
Milepost 9
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
Unknown
Crossing
Yes
Road Crossing Ind
Yes
Road Type
Cased
Pipe Facility Type
Intrastate
Item Involved
Pipe
Pipe Type
Pipe Body
Pipe Diameter
6.625
Pipe Wall Thickness
0.25
Pipe Smys
35000
Pipe Specification
Api 5lx Grade B
Pipe Seam Type
Erw - Low Frequency
Pipe Manufacturer
Unkown
Pipe Coating Type
Coal Tar
Installation Year
1966
Manufactured Year
1966
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Pinhole
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
7
Est Cost Prop Damage
515262
Est Cost Emergency
0
Est Cost Environmental
0
Est Cost Other
0
Prpty
515269
Accident Psig
840
Mop Psig
1440
Accident Pressure
Pressure Did Not Exceed Mop
Pressure Restriction Ind
No
Length Segment Isolated
48576
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
The leak was so small and slow that it would not be possible for control center personnel to detect the leak.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Corrosion Failure
Cause Details
External Corrosion
Internal External
External Corrosion
Visual Exam Results
Localized Pitting
Other Corrosion Ind
Yes
Corrosion Type Details
The Pipe/leak Area Was Exposed To A Atmosphere Within The Annulus Between The Casing And The Pipe. Air Movement Between The Casing And Pipe Caused Moisture/condensation Creating A Corrosive Atmosphere At The Point Where Coating Damage Was Evident.
Field Exam Basis Ind
Yes
Underground Location
Yes
Under Cathodic Protection Ind
Yes
Cathodic Pro Start Year
1966
Shielding Evident
Yes
Cathodic Survey Type
Yes
Cp Annual Survey Ind
Yes
Cp Annual Survey Year
2014
Prior Damage
Yes
Collected Data Ind
Yes
Geometry Deformation Ind
Yes
Geometry Recent Year
2009
Other Recent Year
2009
Has Hydrtst Conduc Before Ind
No
Direct Asmnt Conducted
No
Non Destructive Exam Ind
No
Preparer Name
G****** S* P*****
Preparer Title
Dot Specialist
Preparer Email
P******@c******.com
Preparer Telephone
7134326254
Preparer Fax
7134323477
Prepared Date
2015-03-25 00:00:00
Authorizer Name
G****** S* P*****
Authorizer Telephone
7134326254
Authorizer Title
Dot Specialist
Authorizer Email
P******@c******.com
Narrative
During the morning of 24jul14, a routine survey detected an intermitted vapor emitting from a casing vent near la-3127 in taft, la. The vapor has been continually monitored and air samples were collected for analysis. At 1700 cdt on 25jul14, it was confirmed that the slow leak was associated with the propylene pp04 line. The line was blocked in utilizing by means of manual valves. The quantity released was found to below the reportable threshold but repair costs were a cause for reporting. The pipe/leak area was exposed to a atmosphere within the annulus between the casing and the pipe. Air movement between the casing and pipe caused moisture/condensation creating a corrosive atmosphere at the point where coating damage was evident. The smart pig run was not on a 5 year interval due to the fact it was not in a hca and therefore was based on chevron's own analysis to run the tool.
| Report Received Date | 2014-08-22 00:00:00 |
|---|---|
| Iyear | 2014 |
| Report Number | 20140300 |
| Supplemental Number | 20272 |
| Report Type | Supplemental Final |
| Operator Id | 31556 PHMSA Enforcement |
| Name | Chevron Midstream Pipelines Llc |
| Operator Street Address | 1400 Smith St |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77002 |
| Local Datetime | 2014-07-25 17:00:00 |
| Location Latitude | 29.976335 Google Maps OpenStreetMap |
| Location Longitude | -90.469736 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 | 0.02 |
| 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 | 2014-07-25 17:00:00 |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| On Off Shore | Onshore |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2014-07-25 17:00:00 |
| Restart Datetime | 2014-08-15 07:00:00 |
| On Site Datetime | 2014-07-25 17:00:00 |
| Nrc Rpt Datetime | 2014-07-25 18:59:00 |
| Nrc Rpt Num | 1090285 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 | Pp04 |
| Segment Name | Tends Pipeline System |
| Onshore State Abbreviation | La |
| Onshore Postal Code | 70057 |
| Onshore City Name | Hahnville |
| Onshore County Name | St. Charles |
| Designated Location | Milepost/valve Station |
| Designated Name | Milepost 9 |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | Unknown |
| Crossing | Yes |
| Road Crossing Ind | Yes |
| Road Type | Cased |
| Pipe Facility Type | Intrastate |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Pipe Diameter | 6.625 |
| Pipe Wall Thickness | 0.25 |
| Pipe Smys | 35000 |
| Pipe Specification | Api 5lx Grade B |
| Pipe Seam Type | Erw - Low Frequency |
| Pipe Manufacturer | Unkown |
| Pipe Coating Type | Coal Tar |
| Installation Year | 1966 |
| Manufactured Year | 1966 |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Pinhole |
| 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 | 7 |
| Est Cost Prop Damage | 515262 |
| Est Cost Emergency | 0 |
| Est Cost Environmental | 0 |
| Est Cost Other | 0 |
| Prpty | 515269 |
| Accident Psig | 840 |
| Mop Psig | 1440 |
| Accident Pressure | Pressure Did Not Exceed Mop |
| Pressure Restriction Ind | No |
| Length Segment Isolated | 48576 |
| 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 | The leak was so small and slow that it would not be possible for control center personnel to detect the leak. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Corrosion Failure |
| Cause Details | External Corrosion |
| Internal External | External Corrosion |
| Visual Exam Results | Localized Pitting |
| Other Corrosion Ind | Yes |
| Corrosion Type Details | The Pipe/leak Area Was Exposed To A Atmosphere Within The Annulus Between The Casing And The Pipe. Air Movement Between The Casing And Pipe Caused Moisture/condensation Creating A Corrosive Atmosphere At The Point Where Coating Damage Was Evident. |
| Field Exam Basis Ind | Yes |
| Underground Location | Yes |
| Under Cathodic Protection Ind | Yes |
| Cathodic Pro Start Year | 1966 |
| Shielding Evident | Yes |
| Cathodic Survey Type | Yes |
| Cp Annual Survey Ind | Yes |
| Cp Annual Survey Year | 2014 |
| Prior Damage | Yes |
| Collected Data Ind | Yes |
| Geometry Deformation Ind | Yes |
| Geometry Recent Year | 2009 |
| Other Recent Year | 2009 |
| Has Hydrtst Conduc Before Ind | No |
| Direct Asmnt Conducted | No |
| Non Destructive Exam Ind | No |
| Preparer Name | G****** S* P***** |
| Preparer Title | Dot Specialist |
| Preparer Email | P******@c******.com |
| Preparer Telephone | 7134326254 |
| Preparer Fax | 7134323477 |
| Prepared Date | 2015-03-25 00:00:00 |
| Authorizer Name | G****** S* P***** |
| Authorizer Telephone | 7134326254 |
| Authorizer Title | Dot Specialist |
| Authorizer Email | P******@c******.com |
| Narrative | During the morning of 24jul14, a routine survey detected an intermitted vapor emitting from a casing vent near la-3127 in taft, la. The vapor has been continually monitored and air samples were collected for analysis. At 1700 cdt on 25jul14, it was confirmed that the slow leak was associated with the propylene pp04 line. The line was blocked in utilizing by means of manual valves. The quantity released was found to below the reportable threshold but repair costs were a cause for reporting. The pipe/leak area was exposed to a atmosphere within the annulus between the casing and the pipe. Air movement between the casing and pipe caused moisture/condensation creating a corrosive atmosphere at the point where coating damage was evident. The smart pig run was not on a 5 year interval due to the fact it was not in a hca and therefore was based on chevron's own analysis to run the tool. |
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