Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2020-07-17 — OK
Operator
Transcontinental Gas Pipe Line Company
Cause
Equipment Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$66,801
Incident datetime
2020-07-17 13:00
Report number
Location
OK
Narrative
Williams tech and apv valve service were troubleshooting the williams owned vermillion 67 platform lc 300 20 inch pig launcher block valve eim actuator. While operating the valve began to leak gas and oil mix intermittently from the stem seal. Troubleshooting was stopped and notifications were made to the operations supervisor. The supervisor then made notifications to the soc, offshore regulatory lead, and the management team. There is currently no impact to water, oil pads were placed on the actuator and a drip pan placed under the valve to prevent any impact to the water. Although the leak happened on july 17th it was not determined that the cost of repair threshold for reporting was going to be met until july 23rd hence the call to the nrc. 8/19/2020 update. Leak determined to be due to normal wear and tear of the valve seal. On 8/13/2020 pressure was reduced and recompressed and at that time the leak stopped. The leak took place after the demarcation point as to what williams considers gathering and what is transmission. As part of our response, williams realized that there is a mistake within our gis maps and this line was reported abandoned during the 2020 annual report and npms submittal. Williams is working on fixing this issue and creating a supplemental report of the annual report and npms submittal.
Detailed record list
Report Received Date
2020-08-13 00:00:00
Iyear
2020
Report Number
20200080
Supplemental Number
34435
Report Type
Supplemental Final
Operator Id
19570
Name
Transcontinental Gas Pipe Line Company
Operator Street Address
One Williams Center Md 43-4
Operator City Name
Tulsa
Operator State Abbreviation
OK
Operator Postal Code
74172
Local Datetime
2020-07-23 08:30:00
Time Zone
Eastern
Daylight Savings Ind
Yes
Location Latitude
29.1788
Location Longitude
-92.2235
Nrc Rpt Num
1282605
Nrc Rpt Datetime
2020-07-23 08:52:00
Additional Nrc Report Numbers
1282744
Commodity Released Type
Natural Gas
Unintentional Release
0.036
Intentional Release
0
Accompanying Liquid
0.1
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Status When Identified
Post-Maintenance/repair
Communication State Fed Ind
No
Ignite Ind
No
Num Pub Evacuated
0
Incident Identified Datetime
2020-07-17 13:00:00
On Site Datetime
2020-07-17 13:00:00
On Off Shore
Offshore
Pipe Fac Name
20" From Vermillion 67 To Shore
Segment Name
22-6004
Off Water Depth
40
Off Accident Origin
On The Outer Continental Shelf (Ocs)
Ocs Type
Ocs-Gulf Of Mexico
Off Ocs Area
Vermillion
Off Ocs Block
67
Off Area Accident Type
Platform
Pipe Facility Type
Interstate
System Part Involved
Offshore Platform, Including Platform-Mounted Equipment And Piping
Item Involved
Valve
Valve Type
Auxiliary Or Other Valve
Installation Year
1968
Manufactured Year
1968
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Seal Or Packing
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
380
Heat Damage Ind
No
Non Heat Damage Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
0
Est Cost Intentional Release
0
Est Cost Prop Damage
66801
Est Cost Emergency
0
Est Cost Other
0
Gas Cost In Mcf
2
Prpty
66801
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
0
Num Business Building Affctd
0
Wildlife Impact Ind
No
Accident Psig
760
Gas Flow In Pipe In Mcf
0
Mop Psig
1168
Mop Cfr Section
192.619(C)
Maop Established Date
1970-07-01 00:00:00
Maop Reversal Flow Ind
No
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Gas Required Odorized 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
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
A very small leak not captured by scada
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
Valve Stem Seal Failed Due To Normal Wear And Tear.
Additional Erosion Wear Ind
Yes
Preparer Name
E**** R********
Preparer Title
Regulatory Compliance Specialist
Preparer Email
E****************@w*******.com
Preparer Telephone
7132152846
Local Contact Name
T***** L*****
Local Contact Email
T************@w*******.com
Local Contact Telephone
3372633899
Authorizer Name
T**** G****
Authorizer Title
Manager Pipeline Safety
Authorizer Telephone
7132152535
Authorizer Email
T**********@w*******.com
Narrative
Williams tech and apv valve service were troubleshooting the williams owned vermillion 67 platform lc 300 20 inch pig launcher block valve eim actuator. While operating the valve began to leak gas and oil mix intermittently from the stem seal. Troubleshooting was stopped and notifications were made to the operations supervisor. The supervisor then made notifications to the soc, offshore regulatory lead, and the management team. There is currently no impact to water, oil pads were placed on the actuator and a drip pan placed under the valve to prevent any impact to the water. Although the leak happened on july 17th it was not determined that the cost of repair threshold for reporting was going to be met until july 23rd hence the call to the nrc. 8/19/2020 update. Leak determined to be due to normal wear and tear of the valve seal. On 8/13/2020 pressure was reduced and recompressed and at that time the leak stopped. The leak took place after the demarcation point as to what williams considers gathering and what is transmission. As part of our response, williams realized that there is a mistake within our gis maps and this line was reported abandoned during the 2020 annual report and npms submittal. Williams is working on fixing this issue and creating a supplemental report of the annual report and npms submittal.
| Report Received Date | 2020-08-13 00:00:00 |
|---|---|
| Iyear | 2020 |
| Report Number | 20200080 |
| Supplemental Number | 34435 |
| Report Type | Supplemental Final |
| Operator Id | 19570 PHMSA Enforcement |
| Name | Transcontinental Gas Pipe Line Company |
| Operator Street Address | One Williams Center Md 43-4 |
| Operator City Name | Tulsa |
| Operator State Abbreviation | OK |
| Operator Postal Code | 74172 |
| Local Datetime | 2020-07-23 08:30:00 |
| Time Zone | Eastern |
| Daylight Savings Ind | Yes |
| Location Latitude | 29.1788 Google Maps OpenStreetMap |
| Location Longitude | -92.2235 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1282605 NRC Report How to search |
| Nrc Rpt Datetime | 2020-07-23 08:52:00 |
| Additional Nrc Report Numbers | 1282744 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 0.036 |
| Intentional Release | 0 |
| Accompanying Liquid | 0.1 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Status When Identified | Post-Maintenance/repair |
| Communication State Fed Ind | No |
| Ignite Ind | No |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2020-07-17 13:00:00 |
| On Site Datetime | 2020-07-17 13:00:00 |
| On Off Shore | Offshore |
| Pipe Fac Name | 20" From Vermillion 67 To Shore |
| Segment Name | 22-6004 |
| Off Water Depth | 40 |
| Off Accident Origin | On The Outer Continental Shelf (Ocs) |
| Ocs Type | Ocs-Gulf Of Mexico |
| Off Ocs Area | Vermillion |
| Off Ocs Block | 67 |
| Off Area Accident Type | Platform |
| Pipe Facility Type | Interstate |
| System Part Involved | Offshore Platform, Including Platform-Mounted Equipment And Piping |
| Item Involved | Valve |
| Valve Type | Auxiliary Or Other Valve |
| Installation Year | 1968 |
| Manufactured Year | 1968 |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Seal Or Packing |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 380 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 0 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 66801 |
| Est Cost Emergency | 0 |
| Est Cost Other | 0 |
| Gas Cost In Mcf | 2 |
| Prpty | 66801 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 0 |
| Num Business Building Affctd | 0 |
| Wildlife Impact Ind | No |
| Accident Psig | 760 |
| Gas Flow In Pipe In Mcf | 0 |
| Mop Psig | 1168 |
| Mop Cfr Section | 192.619(C) View CFR 49 §192 |
| Maop Established Date | 1970-07-01 00:00:00 |
| Maop Reversal Flow Ind | No |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | No |
| Gas Required Odorized 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 | 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 | A very small leak not captured by scada |
| 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 | Valve Stem Seal Failed Due To Normal Wear And Tear. |
| Additional Erosion Wear Ind | Yes |
| Preparer Name | E**** R******** |
| Preparer Title | Regulatory Compliance Specialist |
| Preparer Email | E****************@w*******.com |
| Preparer Telephone | 7132152846 |
| Local Contact Name | T***** L***** |
| Local Contact Email | T************@w*******.com |
| Local Contact Telephone | 3372633899 |
| Authorizer Name | T**** G**** |
| Authorizer Title | Manager Pipeline Safety |
| Authorizer Telephone | 7132152535 |
| Authorizer Email | T**********@w*******.com |
| Narrative | Williams tech and apv valve service were troubleshooting the williams owned vermillion 67 platform lc 300 20 inch pig launcher block valve eim actuator. While operating the valve began to leak gas and oil mix intermittently from the stem seal. Troubleshooting was stopped and notifications were made to the operations supervisor. The supervisor then made notifications to the soc, offshore regulatory lead, and the management team. There is currently no impact to water, oil pads were placed on the actuator and a drip pan placed under the valve to prevent any impact to the water. Although the leak happened on july 17th it was not determined that the cost of repair threshold for reporting was going to be met until july 23rd hence the call to the nrc. 8/19/2020 update. Leak determined to be due to normal wear and tear of the valve seal. On 8/13/2020 pressure was reduced and recompressed and at that time the leak stopped. The leak took place after the demarcation point as to what williams considers gathering and what is transmission. As part of our response, williams realized that there is a mistake within our gis maps and this line was reported abandoned during the 2020 annual report and npms submittal. Williams is working on fixing this issue and creating a supplemental report of the annual report and npms submittal. |
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