Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2014-11-23 — TX
Operator
Columbia Gas Transmission, Llc
Cause
Material Failure Of Pipe Or Weld
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$12,000
Incident datetime
2014-11-23 06:16
Report number
Location
TX
Narrative
A relief valve (rv) was activated and released an unintended amount of material into atmosphere at a columbia gas transmission, llc (columbia) compressor station (cs) facility in perrysville, oh. This cs is owned, operated and maintained by columbia. While the rv was still relieving material, the 2-in pipeline that this rv was installed on was broken. This stand-off steel pipe is of 2-in diameter with a wall thickness of .218-in. Was found broken-off at its lower section (close to the pipeline this rv is protecting) and separating the rv from its pipe. The broken 2-in pipe was removed and sent to a metallurgical investigation failure consultant for further analysis and investigation. Prior to the material release, the cs units were shut down as flow from the storage field was not required to maintain customer demand. When this occurs, depending on storage volume, the pipeline pressure gradually increased up to the prevailing storage field well pressure. At the time, the compressor station piping and valving was configured to allow this pressure rise into the cs suction piping which has two relief valves set at 720 psig. One rv actuated and vented as intended; and kept the suction piping pressure from increasing further. Results of metallurgical failure analysis indicate that the cause of the 2-in diameter pipe failure was fatigue as a result of cyclic bending. As a preventive measure to prevent the chain of events from re-occuring in the future, a support was introduced to the rv-pipe assembly where it will dis-allow the rv vent stack from swaying, hence, dampening the cyclic effect that led to this incident. Similar installation was applied on a similar application within the same facility.
Detailed record list
Report Received Date
2014-12-19 00:00:00
Iyear
2014
Report Number
20140146
Supplemental Number
16903
Report Type
Supplemental Final
Operator Id
2616
Name
Columbia Gas Transmission, Llc
Operator Street Address
700 Louisiana St. Suite 700
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77002
Local Datetime
2014-11-23 06:16:00
Location Latitude
40.706538
Location Longitude
-82.360697
Nrc Rpt Num
1101766
Nrc Rpt Datetime
2014-11-23 09:30:00
Commodity Released Type
Natural Gas
Unintentional Release
4424
Intentional Release
0
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2014-11-23 07:20:00
Restart Datetime
2014-11-25 15:00:00
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Incident Identified Datetime
2014-11-23 06:16:00
On Site Datetime
2014-11-23 07:00:00
On Off Shore
Onshore
Onshore State Abbreviation
Oh
Onshore Postal Code
44864
Onshore City Name
Perrysville
Onshore County Name
Richland
Designated Location
Milepost
Designated Name
C105-169
Pipe Fac Name
Lucas Compressor Station
Segment Name
5c-1120-06
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 Compressor Station Equipment And Piping
Item Involved
Pipe
Pipe Type
Pipe Body
Pipe Diameter
2
Pipe Wall Thickness
0.218
Pipe Smys
35000
Pipe Specification
Api 5l
Pipe Seam Type
Seamless
Pipe Manufacturer
Unknown
Pipe Coating Type
Paint
Installation Year
1981
Manufactured Year
1981
Material Involved
Carbon Steel
Release Type
Rupture
Rupture Orient
Circumferential
Rupture Length
2
Rupture Width
2
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
44
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
16059
Est Cost Intentional Release
0
Est Cost Prop Damage
12000
Est Cost Emergency
0
Est Cost Other
0
Prpty
28059
Accident Psig
714
Mop Psig
720
Mop Cfr Section
192.619(A)(2)
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Pipeline Function
Transmission System
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
No
Scada Conf Ind
No
Accident Identifier
Notification From Public
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
Prelimianry indications are pointing to a pre-existing condition on the failed 2-in tap that broke-off leading to an unintended release of material into atmosphere.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Material Failure Of Pipe Or Weld
Cause Details
Design-, Construction-, Installation-, Or Fabrication-Related
Pwjf Failure Type
Design-, Construction-, Installation-, Or Fabrication-Related
Metallurgical Ind
Yes
Fatigue Vibr Related
Yes
Failure Subtype
Mechanical Vibration
Additional Crack Ind
Yes
Pwf Additional Other Ind
Yes
Additional Other Details
Failure Of The 2-In Diameter Pipe Was Fatigue As A Result Of Cyclic Bending Due To Inadequate Pipe Support.
Collected Data Ind
No
Has Hydrtst Conduc Before Ind
No
Direct Asmnt Conducted
No
Non Destructive Exam Ind
No
Preparer Name
G***** H*****
Preparer Title
Engineer
Preparer Email
G******@c**.com
Preparer Telephone
(304) 357-3728
Preparer Fax
(304) 357-3522
Authorizer Name
P**** M****** H******
Authorizer Title
Manager - System Integrity
Authorizer Telephone
(304) 357-2548
Authorizer Email
M**********@c**.com
Narrative
A relief valve (rv) was activated and released an unintended amount of material into atmosphere at a columbia gas transmission, llc (columbia) compressor station (cs) facility in perrysville, oh. This cs is owned, operated and maintained by columbia. While the rv was still relieving material, the 2-in pipeline that this rv was installed on was broken. This stand-off steel pipe is of 2-in diameter with a wall thickness of .218-in. Was found broken-off at its lower section (close to the pipeline this rv is protecting) and separating the rv from its pipe. The broken 2-in pipe was removed and sent to a metallurgical investigation failure consultant for further analysis and investigation. Prior to the material release, the cs units were shut down as flow from the storage field was not required to maintain customer demand. When this occurs, depending on storage volume, the pipeline pressure gradually increased up to the prevailing storage field well pressure. At the time, the compressor station piping and valving was configured to allow this pressure rise into the cs suction piping which has two relief valves set at 720 psig. One rv actuated and vented as intended; and kept the suction piping pressure from increasing further. Results of metallurgical failure analysis indicate that the cause of the 2-in diameter pipe failure was fatigue as a result of cyclic bending. As a preventive measure to prevent the chain of events from re-occuring in the future, a support was introduced to the rv-pipe assembly where it will dis-allow the rv vent stack from swaying, hence, dampening the cyclic effect that led to this incident. Similar installation was applied on a similar application within the same facility.
| Report Received Date | 2014-12-19 00:00:00 |
|---|---|
| Iyear | 2014 |
| Report Number | 20140146 |
| Supplemental Number | 16903 |
| Report Type | Supplemental Final |
| Operator Id | 2616 PHMSA Enforcement |
| Name | Columbia Gas Transmission, Llc |
| Operator Street Address | 700 Louisiana St. Suite 700 |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77002 |
| Local Datetime | 2014-11-23 06:16:00 |
| Location Latitude | 40.706538 Google Maps OpenStreetMap |
| Location Longitude | -82.360697 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1101766 NRC Report How to search |
| Nrc Rpt Datetime | 2014-11-23 09:30:00 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 4424 |
| Intentional Release | 0 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2014-11-23 07:20:00 |
| Restart Datetime | 2014-11-25 15:00:00 |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2014-11-23 06:16:00 |
| On Site Datetime | 2014-11-23 07:00:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Oh |
| Onshore Postal Code | 44864 |
| Onshore City Name | Perrysville |
| Onshore County Name | Richland |
| Designated Location | Milepost |
| Designated Name | C105-169 |
| Pipe Fac Name | Lucas Compressor Station |
| Segment Name | 5c-1120-06 |
| 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 Compressor Station Equipment And Piping |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Pipe Diameter | 2 |
| Pipe Wall Thickness | 0.218 |
| Pipe Smys | 35000 |
| Pipe Specification | Api 5l |
| Pipe Seam Type | Seamless |
| Pipe Manufacturer | Unknown |
| Pipe Coating Type | Paint |
| Installation Year | 1981 |
| Manufactured Year | 1981 |
| Material Involved | Carbon Steel |
| Release Type | Rupture |
| Rupture Orient | Circumferential |
| Rupture Length | 2 |
| Rupture Width | 2 |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 44 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 16059 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 12000 |
| Est Cost Emergency | 0 |
| Est Cost Other | 0 |
| Prpty | 28059 |
| Accident Psig | 714 |
| Mop Psig | 720 |
| Mop Cfr Section | 192.619(A)(2) View CFR 49 §192 |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | No |
| Pipeline Function | Transmission System |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | No |
| Scada Conf Ind | No |
| Accident Identifier | Notification From Public |
| 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 | Prelimianry indications are pointing to a pre-existing condition on the failed 2-in tap that broke-off leading to an unintended release of material into atmosphere. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Material Failure Of Pipe Or Weld |
| Cause Details | Design-, Construction-, Installation-, Or Fabrication-Related |
| Pwjf Failure Type | Design-, Construction-, Installation-, Or Fabrication-Related |
| Metallurgical Ind | Yes |
| Fatigue Vibr Related | Yes |
| Failure Subtype | Mechanical Vibration |
| Additional Crack Ind | Yes |
| Pwf Additional Other Ind | Yes |
| Additional Other Details | Failure Of The 2-In Diameter Pipe Was Fatigue As A Result Of Cyclic Bending Due To Inadequate Pipe Support. |
| Collected Data Ind | No |
| Has Hydrtst Conduc Before Ind | No |
| Direct Asmnt Conducted | No |
| Non Destructive Exam Ind | No |
| Preparer Name | G***** H***** |
| Preparer Title | Engineer |
| Preparer Email | G******@c**.com |
| Preparer Telephone | (304) 357-3728 |
| Preparer Fax | (304) 357-3522 |
| Authorizer Name | P**** M****** H****** |
| Authorizer Title | Manager - System Integrity |
| Authorizer Telephone | (304) 357-2548 |
| Authorizer Email | M**********@c**.com |
| Narrative | A relief valve (rv) was activated and released an unintended amount of material into atmosphere at a columbia gas transmission, llc (columbia) compressor station (cs) facility in perrysville, oh. This cs is owned, operated and maintained by columbia. While the rv was still relieving material, the 2-in pipeline that this rv was installed on was broken. This stand-off steel pipe is of 2-in diameter with a wall thickness of .218-in. Was found broken-off at its lower section (close to the pipeline this rv is protecting) and separating the rv from its pipe. The broken 2-in pipe was removed and sent to a metallurgical investigation failure consultant for further analysis and investigation. Prior to the material release, the cs units were shut down as flow from the storage field was not required to maintain customer demand. When this occurs, depending on storage volume, the pipeline pressure gradually increased up to the prevailing storage field well pressure. At the time, the compressor station piping and valving was configured to allow this pressure rise into the cs suction piping which has two relief valves set at 720 psig. One rv actuated and vented as intended; and kept the suction piping pressure from increasing further. Results of metallurgical failure analysis indicate that the cause of the 2-in diameter pipe failure was fatigue as a result of cyclic bending. As a preventive measure to prevent the chain of events from re-occuring in the future, a support was introduced to the rv-pipe assembly where it will dis-allow the rv vent stack from swaying, hence, dampening the cyclic effect that led to this incident. Similar installation was applied on a similar application within the same facility. |
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