Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2012-05-02 — TX
Operator
Mojave Pipeline Operating Company
Cause
Equipment Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$488,000
Incident datetime
2012-05-02 08:30
Report number
Location
TX
Narrative
Mojave pipeline operating company gas control personal encountered a pressure drop via scada information on the mojave pipeline. Local operating personnel in the vicinity of arvin, ca, were dispatched and found that a fabrication of relief valves and pipe supports had failed, causing damage to the mojave facility and some surrounding cherry trees. The investigation into the root cause of revealed the following: the inadequacy of the structural support provided at this installation and its failure allowed for the failure of the piping systems it was intended to protect. - undersized structural members in support to withstand predicted forces of venting - incorrect orientation of support columns and cross member (weak axis exposed) - connection between pipe and support didnot insure transfer of forces the relief valves were found not to have heightened the likelihood of the gas release nor did they add to the impact of the release, so they were not contributing factors as defined by PHMSA.
Detailed record list
Report Received Date
2012-06-01 00:00:00
Iyear
2012
Report Number
20120058
Supplemental Number
16203
Report Type
Supplemental Final
Operator Id
Name
Mojave Pipeline Operating Company
Operator Street Address
1001 Louisiana St, Suite 1000
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77002
Local Datetime
2012-05-02 08:20:00
Location Latitude
35.161604
Location Longitude
-118.806282
Nrc Rpt Num
1010322
Nrc Rpt Datetime
2012-05-02 09:28:00
Commodity Released Type
Natural Gas
Unintentional Release
585457
Intentional Release
0
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2012-05-02 09:06:00
Restart Datetime
2012-05-04 19:00:00
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Incident Identified Datetime
2012-05-02 08:30:00
On Site Datetime
2012-05-02 08:30:00
On Off Shore
Onshore
Onshore State Abbreviation
Ca
Onshore Postal Code
93203
Onshore City Name
Arvin
Onshore County Name
Kern
Designated Location
Milepost
Designated Name
118+1904
Pipe Fac Name
Line 1901 Common, Mojave Pipeline
Segment Name
Line 1901 Bifurcation
Federal
No
Location Type
Operator-Controlled Property
Incident Area Type
Aboveground
Incident Area Subtype
Typical Aboveground Facility Piping Or Appurtenance
Crossing
No
Pipe Facility Type
Interstate
System Part Involved
Onshore Pipeline, Including Valve Sites
Item Involved
Pipe
Pipe Type
Pipe Body
Pipe Diameter
6
Pipe Wall Thickness
0.28
Pipe Smys
35000
Pipe Specification
Api 5l-B
Pipe Seam Type
Seamless
Pipe Manufacturer
Nkk Corporation
Pipe Coating Type
Paint
Installation Year
1992
Manufactured Year
1991
Material Involved
Carbon Steel
Release Type
Rupture
Rupture Orient
Circumferential
Rupture Length
6
Rupture Width
6
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
158
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
16000
Est Cost Unintentional Release
963643
Est Cost Intentional Release
0
Est Cost Prop Damage
488000
Est Cost Emergency
8000
Est Cost Other
0
Prpty
1475643
Accident Psig
917
Mop Psig
1200
Mop Cfr Section
Not On Omb-Approved Form When Submitted
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Upstream Valve Type Ind
Remotely Controlled
Downstream Valve Type Ind
Remotely Controlled
Length Segment Isolated
100320
Internal Inspection Ind
No
Other Inspection Ind
Yes
Internal Inspection Details
Piping Involved Was Fabricated Station Type Of A Facility Such That An Ili Does Not Apply.
Operation Complications Ind
Yes
Other Complications Ind
Yes
Inspect Comp Details
See Question 5(D) Above.
Pipeline Function
Transmission System
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
Yes
Scada Conf Ind
No
Accident Identifier
Scada-Based Information (Such As Alarm(S), Alert(S), Event(S), And/or Volume Or Pack Calculations)
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
Operational parameters were within normal limits and no remote valve commands had been issued.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Equipment Failure
Cause Details
Other Equipment Failure
Eq Failure Type
Other Equipment Failure
Eq Failure Details
Undersized Structural Support Members Did Not Withstand Venting Forces.
Additional Support Ind
Yes
Preparer Name
K****** C P*****
Preparer Title
Engineer - Pipeline Sr
Preparer Email
K*********@k***********.com
Preparer Telephone
2053257554
Preparer Fax
2053253729
Authorizer Name
R*** G*****
Authorizer Title
Director Compliance - Codes And Standards
Authorizer Telephone
713-420-5433
Authorizer Email
R**********@k***********.com
Narrative
Mojave pipeline operating company gas control personal encountered a pressure drop via scada information on the mojave pipeline. Local operating personnel in the vicinity of arvin, ca, were dispatched and found that a fabrication of relief valves and pipe supports had failed, causing damage to the mojave facility and some surrounding cherry trees. The investigation into the root cause of revealed the following: the inadequacy of the structural support provided at this installation and its failure allowed for the failure of the piping systems it was intended to protect. - undersized structural members in support to withstand predicted forces of venting - incorrect orientation of support columns and cross member (weak axis exposed) - connection between pipe and support didnot insure transfer of forces the relief valves were found not to have heightened the likelihood of the gas release nor did they add to the impact of the release, so they were not contributing factors as defined by PHMSA.
| Report Received Date | 2012-06-01 00:00:00 |
|---|---|
| Iyear | 2012 |
| Report Number | 20120058 |
| Supplemental Number | 16203 |
| Report Type | Supplemental Final |
| Operator Id | 840 PHMSA Enforcement |
| Name | Mojave Pipeline Operating Company |
| Operator Street Address | 1001 Louisiana St, Suite 1000 |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77002 |
| Local Datetime | 2012-05-02 08:20:00 |
| Location Latitude | 35.161604 Google Maps OpenStreetMap |
| Location Longitude | -118.806282 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1010322 NRC Report How to search |
| Nrc Rpt Datetime | 2012-05-02 09:28:00 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 585457 |
| Intentional Release | 0 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2012-05-02 09:06:00 |
| Restart Datetime | 2012-05-04 19:00:00 |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2012-05-02 08:30:00 |
| On Site Datetime | 2012-05-02 08:30:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Ca |
| Onshore Postal Code | 93203 |
| Onshore City Name | Arvin |
| Onshore County Name | Kern |
| Designated Location | Milepost |
| Designated Name | 118+1904 |
| Pipe Fac Name | Line 1901 Common, Mojave Pipeline |
| Segment Name | Line 1901 Bifurcation |
| Federal | No |
| Location Type | Operator-Controlled Property |
| Incident Area Type | Aboveground |
| Incident Area Subtype | Typical Aboveground Facility Piping Or Appurtenance |
| Crossing | No |
| Pipe Facility Type | Interstate |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Pipe Diameter | 6 |
| Pipe Wall Thickness | 0.28 |
| Pipe Smys | 35000 |
| Pipe Specification | Api 5l-B |
| Pipe Seam Type | Seamless |
| Pipe Manufacturer | Nkk Corporation |
| Pipe Coating Type | Paint |
| Installation Year | 1992 |
| Manufactured Year | 1991 |
| Material Involved | Carbon Steel |
| Release Type | Rupture |
| Rupture Orient | Circumferential |
| Rupture Length | 6 |
| Rupture Width | 6 |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 158 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Est Cost Oper Paid | 16000 |
| Est Cost Unintentional Release | 963643 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 488000 |
| Est Cost Emergency | 8000 |
| Est Cost Other | 0 |
| Prpty | 1475643 |
| Accident Psig | 917 |
| Mop Psig | 1200 |
| Mop Cfr Section | Not On Omb-Approved Form When Submitted View CFR 49 §192 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | No |
| Upstream Valve Type Ind | Remotely Controlled |
| Downstream Valve Type Ind | Remotely Controlled |
| Length Segment Isolated | 100320 |
| Internal Inspection Ind | No |
| Other Inspection Ind | Yes |
| Internal Inspection Details | Piping Involved Was Fabricated Station Type Of A Facility Such That An Ili Does Not Apply. |
| Operation Complications Ind | Yes |
| Other Complications Ind | Yes |
| Inspect Comp Details | See Question 5(D) Above. |
| Pipeline Function | Transmission System |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | Yes |
| Scada Conf Ind | No |
| Accident Identifier | Scada-Based Information (Such As Alarm(S), Alert(S), Event(S), And/or Volume Or Pack Calculations) |
| 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 | Operational parameters were within normal limits and no remote valve commands had been issued. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Equipment Failure |
| Cause Details | Other Equipment Failure |
| Eq Failure Type | Other Equipment Failure |
| Eq Failure Details | Undersized Structural Support Members Did Not Withstand Venting Forces. |
| Additional Support Ind | Yes |
| Preparer Name | K****** C P***** |
| Preparer Title | Engineer - Pipeline Sr |
| Preparer Email | K*********@k***********.com |
| Preparer Telephone | 2053257554 |
| Preparer Fax | 2053253729 |
| Authorizer Name | R*** G***** |
| Authorizer Title | Director Compliance - Codes And Standards |
| Authorizer Telephone | 713-420-5433 |
| Authorizer Email | R**********@k***********.com |
| Narrative | Mojave pipeline operating company gas control personal encountered a pressure drop via scada information on the mojave pipeline. Local operating personnel in the vicinity of arvin, ca, were dispatched and found that a fabrication of relief valves and pipe supports had failed, causing damage to the mojave facility and some surrounding cherry trees. The investigation into the root cause of revealed the following: the inadequacy of the structural support provided at this installation and its failure allowed for the failure of the piping systems it was intended to protect. - undersized structural members in support to withstand predicted forces of venting - incorrect orientation of support columns and cross member (weak axis exposed) - connection between pipe and support didnot insure transfer of forces the relief valves were found not to have heightened the likelihood of the gas release nor did they add to the impact of the release, so they were not contributing factors as defined by PHMSA. |
External Resources
PHMSA pipeline safety insights.
Product
Features
Company
All rights reserved. Copyright © by ClearPHMSA