Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2015-08-22 — TX
Operator
Columbia Gas Transmission, Llc
Cause
Corrosion Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$581,996
Incident datetime
2015-08-22 06:19
Report number
Location
TX
Narrative
On the morning of august 22, 2015, a drip installed along line sl-2481 failed leading to an unintended amount of natural gas (material) to vent into atmosphere exceeding the incident reporting threshold. This pipeline is located in lakefield, holmes county, ohio and owned, operated and maintained by columbia gas transmission, llc (columbia), within the holmes storage field (sf). The failure was identified by a nearby columbia employee who was the first responder to the failure site. Necessary safety measures were taken to isolate all wells, sf lines for holmes and wayne sf. The affected storage line (sl) was isolated and material stopped flowing into atmosphere in less than an hour from the time the first responder arrived on site. The drip was removed with the section of the sl that it was tapped into and a new pre-tested pipe was installed, which did not include a drip. The repaired sl was returned back into service on august 25, 2015. The results of the metallurgical failure analysis indicate that the metallurgical cause of the failure was due to internal pitting corrosion. The location of the failure point was at the 08:00 o'clock position and the presence of severe corrosion at the 04:00 o'clock position, suggests that the failed drip was partially filled with sludge/deposits and that an aqueous phase was present on top of the sludge/deposits. This geometry is consistent with a gas-phase related corrosion mechanism. The initial incident report was submitted on september 20, 2015.
Detailed record list
Report Received Date
2015-09-20 00:00:00
Iyear
2015
Report Number
20150115
Supplemental Number
17026
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
2015-08-22 06:30:00
Location Latitude
40.652383
Location Longitude
-82.131645
Nrc Rpt Num
1126372
Nrc Rpt Datetime
2015-08-22 08:40:00
Commodity Released Type
Natural Gas
Unintentional Release
15006
Intentional Release
0
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2015-08-22 07:40:00
Restart Datetime
2015-08-25 08:25:00
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
15
Incident Identified Datetime
2015-08-22 06:19:00
On Site Datetime
2015-08-22 06:21:00
On Off Shore
Onshore
Onshore State Abbreviation
Oh
Onshore Postal Code
44638
Onshore City Name
Lakeville
Onshore County Name
Holmes
Designated Location
Survey Station No.
Designated Name
214650
Pipe Fac Name
Sl-2481 In Holmes Storage Field
Segment Name
Drip
Federal
No
Location Type
Operator-Controlled Property
Incident Area Type
Belowground Storage Or Aboveground Storage Vessel, Including Attached Appurtenance
Crossing
No
Pipe Facility Type
Interstate
System Part Involved
Belowground Storage, Including Associated Equipment And Piping
Item Involved
Pulsation Bottle Or Drip/drip Collection Device
Installation Year
1954
Material Involved
Carbon Steel
Release Type
Rupture
Rupture Orient
Longitudinal
Rupture Length
180
Rupture Width
60
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
478
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
675
Est Cost Unintentional Release
41867
Est Cost Intentional Release
0
Est Cost Prop Damage
581996
Est Cost Emergency
0
Est Cost Other
59363
Est Cost Other Details
Consultant's Fee To Perform Metallurgical Failure Analysis Investigation.
Prpty
683901
Accident Psig
1087
Mop Psig
1200
Mop Cfr Section
192.619(A)(3)
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
No
Scada Detection Ind
No
Scada Conf Ind
Yes
Accident Identifier
Local Operating Personnel, Including Contractors
Operator Type
Operator Employee
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 drip failure was not related to any human interaction.
Employee Drug Test Ind
Yes
Contractor Drug Test Ind
No
Num Employees Tested
1
Num Employees Failed
0
Cause
Corrosion Failure
Cause Details
Internal Corrosion
Internal External
Internal Corrosion
Int Visual Exam Results
Localized Pitting
Int Other Corrosion Ind
Yes
Int Corrosion Type Details
Metallurgical Failure Analysis Investigation Report Referenced Internal Corrosion Pitting Due To A Gas-Phase Related Corrosion Mechanism.
Int Field Exam Basis Ind
Yes
Int Metallurgical Basis Ind
Yes
Int Low Point Pipe Loc Ind
Yes
Corrosion Inhibitors
Yes
Corrosion Lining
No
Cleaning Dewatering
Not Applicable - Not Mainline Pipe
Corrosion Coupons
Not Applicable - Not Mainline Pipe
Preparer Name
G***** H*****
Preparer Title
Engineer
Preparer Email
G******@c**.com
Preparer Telephone
(304)357-3728
Authorizer Name
P**** M****** H******
Authorizer Title
Manage
Authorizer Telephone
(304)357-2548
Authorizer Email
M**********@c**.com
Narrative
On the morning of august 22, 2015, a drip installed along line sl-2481 failed leading to an unintended amount of natural gas (material) to vent into atmosphere exceeding the incident reporting threshold. This pipeline is located in lakefield, holmes county, ohio and owned, operated and maintained by columbia gas transmission, llc (columbia), within the holmes storage field (sf). The failure was identified by a nearby columbia employee who was the first responder to the failure site. Necessary safety measures were taken to isolate all wells, sf lines for holmes and wayne sf. The affected storage line (sl) was isolated and material stopped flowing into atmosphere in less than an hour from the time the first responder arrived on site. The drip was removed with the section of the sl that it was tapped into and a new pre-tested pipe was installed, which did not include a drip. The repaired sl was returned back into service on august 25, 2015. The results of the metallurgical failure analysis indicate that the metallurgical cause of the failure was due to internal pitting corrosion. The location of the failure point was at the 08:00 o'clock position and the presence of severe corrosion at the 04:00 o'clock position, suggests that the failed drip was partially filled with sludge/deposits and that an aqueous phase was present on top of the sludge/deposits. This geometry is consistent with a gas-phase related corrosion mechanism. The initial incident report was submitted on september 20, 2015.
| Report Received Date | 2015-09-20 00:00:00 |
|---|---|
| Iyear | 2015 |
| Report Number | 20150115 |
| Supplemental Number | 17026 |
| 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 | 2015-08-22 06:30:00 |
| Location Latitude | 40.652383 Google Maps OpenStreetMap |
| Location Longitude | -82.131645 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1126372 NRC Report How to search |
| Nrc Rpt Datetime | 2015-08-22 08:40:00 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 15006 |
| Intentional Release | 0 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2015-08-22 07:40:00 |
| Restart Datetime | 2015-08-25 08:25:00 |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 15 |
| Incident Identified Datetime | 2015-08-22 06:19:00 |
| On Site Datetime | 2015-08-22 06:21:00 |
| On Off Shore | Onshore |
| Onshore State Abbreviation | Oh |
| Onshore Postal Code | 44638 |
| Onshore City Name | Lakeville |
| Onshore County Name | Holmes |
| Designated Location | Survey Station No. |
| Designated Name | 214650 |
| Pipe Fac Name | Sl-2481 In Holmes Storage Field |
| Segment Name | Drip |
| Federal | No |
| Location Type | Operator-Controlled Property |
| Incident Area Type | Belowground Storage Or Aboveground Storage Vessel, Including Attached Appurtenance |
| Crossing | No |
| Pipe Facility Type | Interstate |
| System Part Involved | Belowground Storage, Including Associated Equipment And Piping |
| Item Involved | Pulsation Bottle Or Drip/drip Collection Device |
| Installation Year | 1954 |
| Material Involved | Carbon Steel |
| Release Type | Rupture |
| Rupture Orient | Longitudinal |
| Rupture Length | 180 |
| Rupture Width | 60 |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 478 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Est Cost Oper Paid | 675 |
| Est Cost Unintentional Release | 41867 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 581996 |
| Est Cost Emergency | 0 |
| Est Cost Other | 59363 |
| Est Cost Other Details | Consultant's Fee To Perform Metallurgical Failure Analysis Investigation. |
| Prpty | 683901 |
| Accident Psig | 1087 |
| Mop Psig | 1200 |
| Mop Cfr Section | 192.619(A)(3) 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 | No |
| Scada Detection Ind | No |
| Scada Conf Ind | Yes |
| Accident Identifier | Local Operating Personnel, Including Contractors |
| Operator Type | Operator Employee |
| 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 drip failure was not related to any human interaction. |
| Employee Drug Test Ind | Yes |
| Contractor Drug Test Ind | No |
| Num Employees Tested | 1 |
| Num Employees Failed | 0 |
| Cause | Corrosion Failure |
| Cause Details | Internal Corrosion |
| Internal External | Internal Corrosion |
| Int Visual Exam Results | Localized Pitting |
| Int Other Corrosion Ind | Yes |
| Int Corrosion Type Details | Metallurgical Failure Analysis Investigation Report Referenced Internal Corrosion Pitting Due To A Gas-Phase Related Corrosion Mechanism. |
| Int Field Exam Basis Ind | Yes |
| Int Metallurgical Basis Ind | Yes |
| Int Low Point Pipe Loc Ind | Yes |
| Corrosion Inhibitors | Yes |
| Corrosion Lining | No |
| Cleaning Dewatering | Not Applicable - Not Mainline Pipe |
| Corrosion Coupons | Not Applicable - Not Mainline Pipe |
| Preparer Name | G***** H***** |
| Preparer Title | Engineer |
| Preparer Email | G******@c**.com |
| Preparer Telephone | (304)357-3728 |
| Authorizer Name | P**** M****** H****** |
| Authorizer Title | Manage |
| Authorizer Telephone | (304)357-2548 |
| Authorizer Email | M**********@c**.com |
| Narrative | On the morning of august 22, 2015, a drip installed along line sl-2481 failed leading to an unintended amount of natural gas (material) to vent into atmosphere exceeding the incident reporting threshold. This pipeline is located in lakefield, holmes county, ohio and owned, operated and maintained by columbia gas transmission, llc (columbia), within the holmes storage field (sf). The failure was identified by a nearby columbia employee who was the first responder to the failure site. Necessary safety measures were taken to isolate all wells, sf lines for holmes and wayne sf. The affected storage line (sl) was isolated and material stopped flowing into atmosphere in less than an hour from the time the first responder arrived on site. The drip was removed with the section of the sl that it was tapped into and a new pre-tested pipe was installed, which did not include a drip. The repaired sl was returned back into service on august 25, 2015. The results of the metallurgical failure analysis indicate that the metallurgical cause of the failure was due to internal pitting corrosion. The location of the failure point was at the 08:00 o'clock position and the presence of severe corrosion at the 04:00 o'clock position, suggests that the failed drip was partially filled with sludge/deposits and that an aqueous phase was present on top of the sludge/deposits. This geometry is consistent with a gas-phase related corrosion mechanism. The initial incident report was submitted on september 20, 2015. |
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