Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2010-06-21 — OK
Operator
Williams Gas Pipeline - Transco
Cause
Equipment Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$10,000
Incident datetime
2010-06-21 09:24
Report number
Location
OK
Narrative
Factual information leak was reported to operator at 8:28 a.M. June 21, 2010. It was reported to him by district team in route to platform. The leak source was found to be from a grease fitting on a 4" valve in ssti of stub of sub sea tie-in assembly that was left in place after the pipeline was previously abandoned. There was no sheen associated with the leak. The ssti is connected to williams 30" line that runs from ba 538 to shore line. Notifications of the leak were made to wgp management, nrc (no. 944879 was assigned), coast guard, and mms. Wgp employees contracted a diving company, that repaired the leak by installing blind flange between leaking plug and 30" pipeline on june 24th, 2010. Root cause analysis was performed & attached.
Detailed record list
Report Received Date
2010-07-19 00:00:00
Iyear
2010
Report Number
20100041
Supplemental Number
15050
Report Type
Supplemental Final
Operator Id
19570
Name
Williams Gas Pipeline - Transco
Operator Street Address
One Williams Center Md 43-4
Operator City Name
Tulsa
Operator State Abbreviation
OK
Operator Postal Code
74172
Local Datetime
2010-06-21 09:24:00
Location Latitude
28.466111
Location Longitude
-95.728056
Nrc Rpt Num
944879
Nrc Rpt Datetime
2010-06-21 12:30:00
Commodity Released Type
Natural Gas
Unintentional Release
2305
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2010-06-21 13:45:00
Ignite Ind
No
Explode Ind
No
Num Pub Evacuated
0
Incident Identified Datetime
2010-06-21 09:24:00
On Site Datetime
2010-06-23 09:30:00
On Off Shore
Offshore
Off Water Depth
68
Off Accident Origin
In State Waters
Offshore State Abbreviation
Tx
Off Instate Area
Brazos
Off Instate Block
474
Off Area Accident Type
Below Water, Pipe Buried Or Jetted Below Seabed
Pipe Facility Type
Interstate
System Part Involved
Offshore Pipeline, Including Riser And Riser Bend
Item Involved
Valve
Valve Type
Auxiliary Or Other Valve
Item Involved Details
Sub Sea Tie In
Installation Year
1995
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Other
Leak Type Other
Grease Cert Became Loose
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
98
Heat Damage Ind
No
Non Heat Damage Ind
No
Hca Fatalities Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
10574
Est Cost Intentional Release
0
Est Cost Prop Damage
10000
Est Cost Emergency
90000
Est Cost Other
0
Prpty
110574
Accident Psig
1003
Mop Psig
1248
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
Manual
Downstream Valve Type Ind
Manual
Length Segment Isolated
145939
Internal Inspection Ind
No
Diameter Change Ind
Yes
Operation Complications Ind
Yes
Other Complications Ind
Yes
Inspect Comp Details
Non-Piggable Due To Under Water Tie In.
Pipeline Function
Type A Gathering
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
Leak was not of a magnitude to be detected by automated equipment.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Equipment Failure
Cause Details
Malfunction Of Control/relief Equipment
Eq Failure Type
Malfunction Of Control/relief Equipment
Block Valve Ind
Yes
Other Control Relief Ind
Yes
Other Control Relief Details
Grease Cert Loosened.
Eq Additional Other Ind
Yes
Eq Additional Other Details
Grease Cert Loosened.
Preparer Name
E**** R******** J**** M H*******
Preparer Title
P.s.s. Pipeline Integrity Manager
Preparer Email
E****************@w*******.com
Preparer Telephone
713-215-2846
Preparer Fax
713-215-2222
Authorizer Name
M**** S****
Authorizer Title
Pipeline Safety Manager
Authorizer Telephone
713-215-2111
Authorizer Email
M**********@w*******.com
Narrative
Factual information leak was reported to operator at 8:28 a.M. June 21, 2010. It was reported to him by district team in route to platform. The leak source was found to be from a grease fitting on a 4" valve in ssti of stub of sub sea tie-in assembly that was left in place after the pipeline was previously abandoned. There was no sheen associated with the leak. The ssti is connected to williams 30" line that runs from ba 538 to shore line. Notifications of the leak were made to wgp management, nrc (no. 944879 was assigned), coast guard, and mms. Wgp employees contracted a diving company, that repaired the leak by installing blind flange between leaking plug and 30" pipeline on june 24th, 2010. Root cause analysis was performed & attached.
| Report Received Date | 2010-07-19 00:00:00 |
|---|---|
| Iyear | 2010 |
| Report Number | 20100041 |
| Supplemental Number | 15050 |
| Report Type | Supplemental Final |
| Operator Id | 19570 PHMSA Enforcement |
| Name | Williams Gas Pipeline - Transco |
| Operator Street Address | One Williams Center Md 43-4 |
| Operator City Name | Tulsa |
| Operator State Abbreviation | OK |
| Operator Postal Code | 74172 |
| Local Datetime | 2010-06-21 09:24:00 |
| Location Latitude | 28.466111 Google Maps OpenStreetMap |
| Location Longitude | -95.728056 Google Maps OpenStreetMap |
| Nrc Rpt Num | 944879 NRC Report How to search |
| Nrc Rpt Datetime | 2010-06-21 12:30:00 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 2305 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2010-06-21 13:45:00 |
| Ignite Ind | No |
| Explode Ind | No |
| Num Pub Evacuated | 0 |
| Incident Identified Datetime | 2010-06-21 09:24:00 |
| On Site Datetime | 2010-06-23 09:30:00 |
| On Off Shore | Offshore |
| Off Water Depth | 68 |
| Off Accident Origin | In State Waters |
| Offshore State Abbreviation | Tx |
| Off Instate Area | Brazos |
| Off Instate Block | 474 |
| Off Area Accident Type | Below Water, Pipe Buried Or Jetted Below Seabed |
| Pipe Facility Type | Interstate |
| System Part Involved | Offshore Pipeline, Including Riser And Riser Bend |
| Item Involved | Valve |
| Valve Type | Auxiliary Or Other Valve |
| Item Involved Details | Sub Sea Tie In |
| Installation Year | 1995 |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Other |
| Leak Type Other | Grease Cert Became Loose |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 98 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Hca Fatalities Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 10574 |
| Est Cost Intentional Release | 0 |
| Est Cost Prop Damage | 10000 |
| Est Cost Emergency | 90000 |
| Est Cost Other | 0 |
| Prpty | 110574 |
| Accident Psig | 1003 |
| Mop Psig | 1248 |
| 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 | Manual |
| Downstream Valve Type Ind | Manual |
| Length Segment Isolated | 145939 |
| Internal Inspection Ind | No |
| Diameter Change Ind | Yes |
| Operation Complications Ind | Yes |
| Other Complications Ind | Yes |
| Inspect Comp Details | Non-Piggable Due To Under Water Tie In. |
| Pipeline Function | Type A Gathering |
| 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 | Leak was not of a magnitude to be detected by automated equipment. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Equipment Failure |
| Cause Details | Malfunction Of Control/relief Equipment |
| Eq Failure Type | Malfunction Of Control/relief Equipment |
| Block Valve Ind | Yes |
| Other Control Relief Ind | Yes |
| Other Control Relief Details | Grease Cert Loosened. |
| Eq Additional Other Ind | Yes |
| Eq Additional Other Details | Grease Cert Loosened. |
| Preparer Name | E**** R******** J**** M H******* |
| Preparer Title | P.s.s. Pipeline Integrity Manager |
| Preparer Email | E****************@w*******.com |
| Preparer Telephone | 713-215-2846 |
| Preparer Fax | 713-215-2222 |
| Authorizer Name | M**** S**** |
| Authorizer Title | Pipeline Safety Manager |
| Authorizer Telephone | 713-215-2111 |
| Authorizer Email | M**********@w*******.com |
| Narrative | Factual information leak was reported to operator at 8:28 a.M. June 21, 2010. It was reported to him by district team in route to platform. The leak source was found to be from a grease fitting on a 4" valve in ssti of stub of sub sea tie-in assembly that was left in place after the pipeline was previously abandoned. There was no sheen associated with the leak. The ssti is connected to williams 30" line that runs from ba 538 to shore line. Notifications of the leak were made to wgp management, nrc (no. 944879 was assigned), coast guard, and mms. Wgp employees contracted a diving company, that repaired the leak by installing blind flange between leaking plug and 30" pipeline on june 24th, 2010. Root cause analysis was performed & attached. |
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