Incident details
Operator, cause, commodity and consequences with raw source fields.
GD incident on 2013-10-08 — WV
Operator
Dominion Hope
Cause
Equipment Failure
Commodity
Natural Gas
Program
GD
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$71,459
Incident datetime
2013-10-08 07:02
Report number
Location
WV, RANDOLPH COUNTY
Narrative
At 06:09 on 10/08/2013, an overpressure event occurred on dominion hope gas' main pipeline (hm-3095). The root cause was the failure of hope gas regulators due to icing conditions. These regulators are located in station hx-363 and reduce pressure from over 500 psig to 70 psig. At 06:47, a service pipeline that is connected to m-3095 ruptured, causing a blowing leak. The system was isolated and completely shut down at 8:10. No injuries or property damage occurred. A consultant (jana laboratories, inc.) was employed to analyze the incident and recommend changes. As advised by jana labs' preliminary report, dominion hope gas is in the process of inspecting and/or replacing various components of the affected pipeline system. Testing of the pipelines and the regulating/metering stations will be performed in accordance with 46 cfr part 192. The system will be placed into service only when all components are deemed safe and operational. As requested by dominion, jana laboratories is compiling an additional report to recommend long-range plans and concerns. Completion information: a consultant (jana laboratories) completed an evaluation of the affected pipeline system: 5.0 recommendations based on the analysis to date and the testing of the samples received, the following recommendations are made:  the overpressurization resulted in the exposure of three regulator stations, the hdpe mainline, and the mdpe branch to increasing pressure up to >500 psig (maximum 528 psia, or 513 psig), ramping up over a period of approximately one hour. The root cause was reportedly the failure of regulator station hx-363 to regulate pressure from the transmission line due to frozen water in the regulator run.  the integrity of the pipes and fittings has been assessed as follows: o 6" hdpe pipe and associated heat fusion, electrofusion, and transition fittings: no expected impact of overpressurization on long-term performance o 6" hdpe ball valves: no expected impact of overpressurization on long-term performance o 4" mdpe pipe and associated heat fusion, electrofusion, and transition fittings affected (pipe burst); non-burst regions exposed to pressure close to tensile limit o 4" mdpe ball valve: possibly affected; exposed to pressure close to tensile limit  the integrity of the regulator stations has been assessed as follows: o hx-363: not expected to be affected; root cause analysis of entrained water freezing advised before repressurization o tygart valley regional jail: possibly affected; meter, valves, and regulators exposed to pressure > maop o is-267: possibly affected; meter, valves and regulators exposed to pressure > maop  all potentially affected components should be closely examined for damage (in similar fashion to hx-363 after the incident) and replaced if damage is found. It has been indicated that the jail regulator station and the entire mdpe line are scheduled to be replaced.. 1 . Regulators were completed disassembled and inspected at all three stations by a consultant (master controls). Regulators were found to be unaffected by the overpressure situation. 2 twin 3x4 mercer relief valves were installed as additional over-pressure protection at the high pressure cut regulation station. 3. Bruest pilot heaters were installed on the high pressure cut regulation station. 4. New steel enamel building installed over the high pressure cut regulation station to protect heaters from the wind. 5. Mdpe pipe was removed and replace with hdpe. 6. Entire system was retested with air to 155 lbs. 7. Complete station inspections were performed when gas was reintroduced. Gas was reintroduced on 11/25/13.
Detailed record list
Occurred At
2013-10-08 07:02:00
Year
2013
Report Received Date
2013-11-05 00:00:00
Iyear
2013.0
Report Number
20130117.0
Supplemental Number
15860.0
Report Type
Supplemental Final
Operator Id
7348
Name
Dominion Hope
Operator Street Address
781 Chestnut Ridge Rd
Operator City Name
Morgantown
Operator State Abbreviation
WV
Operator Postal Code
26505
Local Datetime
2013-10-08 06:00:00
Location Street Address
400 Abbey Road
Location City Name
Belington
Location County Name
Randolph County
Location State Abbreviation
WV
Location Postal Code
26250-0000
Location Latitude
38.941703
Location Longitude
-79.949524
Nrc Rpt Datetime
2013-10-14 17:07:00
Nrc Rpt Num
1062990
Commodity Released Type
Natural Gas
Unintentional Release
62.83
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Ignite Ind
No
Explode Ind
No
Incident Identified Datetime
2013-10-08 07:02:00
On Site Datetime
2013-10-08 08:03:00
Federal
No
Location Type
Private Property
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Crossing
No
Pipe Facility Type
Privately Owned
System Part Involved
Service
Installation Year
2004.0
Pipe Diameter
4.0
Pipe Specification
Astm 2513
Pipe Manufacturer
Driscoplex
Material Involved
Plastic
Plastic Type
Polyethylene (Pe)
Plastic Sdr
13.5
Material Pe Pipe Code
2406
Release Type
Rupture
Rupture Orient
Longitudinal
Rupture Length
4
Rupture Width
4
Class Location Type
Class 3 Location
Est Cost Oper Paid
5000.0
Est Cost Prop Damage
71459.0
Est Cost Emergency
100.0
Est Cost Other
21000.0
Est Cost Other Details
Consulting Fees.
Est Cost Unintentional Release
210.0
Prpty
97769.0
Commercial Affected
1.0
Industrial Affected
1.0
Residences Affected
0.0
Accident Psig
513.0
Normal Psig
70.0
Mop Psig
100.0
Accident Pressure
Pressure Exceeded The Applicable Allowance In 192.201
Scada In Place 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
Control room operators are only able to monitor (cannot manipulate) the gas pressure.
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
Pressure Regulator Ind
Yes
Preparer Name
J****** L* J****
Preparer Title
Technical Specialist Iii
Preparer Email
J**************@d**.com
Preparer Telephone
304-464-5949
Authorizer Name
K****** L* S****
Authorizer Title
Manager Gas Operations
Authorizer Telephone
304-464-5936
Authorizer Email
K**************@d**.com
Narrative
At 06:09 on 10/08/2013, an overpressure event occurred on dominion hope gas' main pipeline (hm-3095). The root cause was the failure of hope gas regulators due to icing conditions. These regulators are located in station hx-363 and reduce pressure from over 500 psig to 70 psig. At 06:47, a service pipeline that is connected to m-3095 ruptured, causing a blowing leak. The system was isolated and completely shut down at 8:10. No injuries or property damage occurred. A consultant (jana laboratories, inc.) was employed to analyze the incident and recommend changes. As advised by jana labs' preliminary report, dominion hope gas is in the process of inspecting and/or replacing various components of the affected pipeline system. Testing of the pipelines and the regulating/metering stations will be performed in accordance with 46 cfr part 192. The system will be placed into service only when all components are deemed safe and operational. As requested by dominion, jana laboratories is compiling an additional report to recommend long-range plans and concerns. Completion information: a consultant (jana laboratories) completed an evaluation of the affected pipeline system: 5.0 recommendations based on the analysis to date and the testing of the samples received, the following recommendations are made:  the overpressurization resulted in the exposure of three regulator stations, the hdpe mainline, and the mdpe branch to increasing pressure up to >500 psig (maximum 528 psia, or 513 psig), ramping up over a period of approximately one hour. The root cause was reportedly the failure of regulator station hx-363 to regulate pressure from the transmission line due to frozen water in the regulator run.  the integrity of the pipes and fittings has been assessed as follows: o 6" hdpe pipe and associated heat fusion, electrofusion, and transition fittings: no expected impact of overpressurization on long-term performance o 6" hdpe ball valves: no expected impact of overpressurization on long-term performance o 4" mdpe pipe and associated heat fusion, electrofusion, and transition fittings affected (pipe burst); non-burst regions exposed to pressure close to tensile limit o 4" mdpe ball valve: possibly affected; exposed to pressure close to tensile limit  the integrity of the regulator stations has been assessed as follows: o hx-363: not expected to be affected; root cause analysis of entrained water freezing advised before repressurization o tygart valley regional jail: possibly affected; meter, valves, and regulators exposed to pressure > maop o is-267: possibly affected; meter, valves and regulators exposed to pressure > maop  all potentially affected components should be closely examined for damage (in similar fashion to hx-363 after the incident) and replaced if damage is found. It has been indicated that the jail regulator station and the entire mdpe line are scheduled to be replaced.. 1 . Regulators were completed disassembled and inspected at all three stations by a consultant (master controls). Regulators were found to be unaffected by the overpressure situation. 2 twin 3x4 mercer relief valves were installed as additional over-pressure protection at the high pressure cut regulation station. 3. Bruest pilot heaters were installed on the high pressure cut regulation station. 4. New steel enamel building installed over the high pressure cut regulation station to protect heaters from the wind. 5. Mdpe pipe was removed and replace with hdpe. 6. Entire system was retested with air to 155 lbs. 7. Complete station inspections were performed when gas was reintroduced. Gas was reintroduced on 11/25/13.
| Occurred At | 2013-10-08 07:02:00 |
|---|---|
| Year | 2013 |
| Report Received Date | 2013-11-05 00:00:00 |
| Iyear | 2013.0 |
| Report Number | 20130117.0 |
| Supplemental Number | 15860.0 |
| Report Type | Supplemental Final |
| Operator Id | 7348 PHMSA Enforcement |
| Name | Dominion Hope |
| Operator Street Address | 781 Chestnut Ridge Rd |
| Operator City Name | Morgantown |
| Operator State Abbreviation | WV |
| Operator Postal Code | 26505 |
| Local Datetime | 2013-10-08 06:00:00 |
| Location Street Address | 400 Abbey Road |
| Location City Name | Belington |
| Location County Name | Randolph County |
| Location State Abbreviation | WV |
| Location Postal Code | 26250-0000 |
| Location Latitude | 38.941703 Google Maps OpenStreetMap |
| Location Longitude | -79.949524 Google Maps OpenStreetMap |
| Nrc Rpt Datetime | 2013-10-14 17:07:00 |
| Nrc Rpt Num | 1062990 NRC Report How to search |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 62.83 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Ignite Ind | No |
| Explode Ind | No |
| Incident Identified Datetime | 2013-10-08 07:02:00 |
| On Site Datetime | 2013-10-08 08:03:00 |
| Federal | No |
| Location Type | Private Property |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Crossing | No |
| Pipe Facility Type | Privately Owned |
| System Part Involved | Service |
| Installation Year | 2004.0 |
| Pipe Diameter | 4.0 |
| Pipe Specification | Astm 2513 |
| Pipe Manufacturer | Driscoplex |
| Material Involved | Plastic |
| Plastic Type | Polyethylene (Pe) |
| Plastic Sdr | 13.5 |
| Material Pe Pipe Code | 2406 |
| Release Type | Rupture |
| Rupture Orient | Longitudinal |
| Rupture Length | 4 |
| Rupture Width | 4 |
| Class Location Type | Class 3 Location |
| Est Cost Oper Paid | 5000.0 |
| Est Cost Prop Damage | 71459.0 |
| Est Cost Emergency | 100.0 |
| Est Cost Other | 21000.0 |
| Est Cost Other Details | Consulting Fees. |
| Est Cost Unintentional Release | 210.0 |
| Prpty | 97769.0 |
| Commercial Affected | 1.0 |
| Industrial Affected | 1.0 |
| Residences Affected | 0.0 |
| Accident Psig | 513.0 |
| Normal Psig | 70.0 |
| Mop Psig | 100.0 |
| Accident Pressure | Pressure Exceeded The Applicable Allowance In 192.201 |
| Scada In Place 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 | Control room operators are only able to monitor (cannot manipulate) the gas pressure. |
| 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 |
| Pressure Regulator Ind | Yes |
| Preparer Name | J****** L* J**** |
| Preparer Title | Technical Specialist Iii |
| Preparer Email | J**************@d**.com |
| Preparer Telephone | 304-464-5949 |
| Authorizer Name | K****** L* S**** |
| Authorizer Title | Manager Gas Operations |
| Authorizer Telephone | 304-464-5936 |
| Authorizer Email | K**************@d**.com |
| Narrative | At 06:09 on 10/08/2013, an overpressure event occurred on dominion hope gas' main pipeline (hm-3095). The root cause was the failure of hope gas regulators due to icing conditions. These regulators are located in station hx-363 and reduce pressure from over 500 psig to 70 psig. At 06:47, a service pipeline that is connected to m-3095 ruptured, causing a blowing leak. The system was isolated and completely shut down at 8:10. No injuries or property damage occurred. A consultant (jana laboratories, inc.) was employed to analyze the incident and recommend changes. As advised by jana labs' preliminary report, dominion hope gas is in the process of inspecting and/or replacing various components of the affected pipeline system. Testing of the pipelines and the regulating/metering stations will be performed in accordance with 46 cfr part 192. The system will be placed into service only when all components are deemed safe and operational. As requested by dominion, jana laboratories is compiling an additional report to recommend long-range plans and concerns. Completion information: a consultant (jana laboratories) completed an evaluation of the affected pipeline system: 5.0 recommendations based on the analysis to date and the testing of the samples received, the following recommendations are made:  the overpressurization resulted in the exposure of three regulator stations, the hdpe mainline, and the mdpe branch to increasing pressure up to >500 psig (maximum 528 psia, or 513 psig), ramping up over a period of approximately one hour. The root cause was reportedly the failure of regulator station hx-363 to regulate pressure from the transmission line due to frozen water in the regulator run.  the integrity of the pipes and fittings has been assessed as follows: o 6" hdpe pipe and associated heat fusion, electrofusion, and transition fittings: no expected impact of overpressurization on long-term performance o 6" hdpe ball valves: no expected impact of overpressurization on long-term performance o 4" mdpe pipe and associated heat fusion, electrofusion, and transition fittings affected (pipe burst); non-burst regions exposed to pressure close to tensile limit o 4" mdpe ball valve: possibly affected; exposed to pressure close to tensile limit  the integrity of the regulator stations has been assessed as follows: o hx-363: not expected to be affected; root cause analysis of entrained water freezing advised before repressurization o tygart valley regional jail: possibly affected; meter, valves, and regulators exposed to pressure > maop o is-267: possibly affected; meter, valves and regulators exposed to pressure > maop  all potentially affected components should be closely examined for damage (in similar fashion to hx-363 after the incident) and replaced if damage is found. It has been indicated that the jail regulator station and the entire mdpe line are scheduled to be replaced.. 1 . Regulators were completed disassembled and inspected at all three stations by a consultant (master controls). Regulators were found to be unaffected by the overpressure situation. 2 twin 3x4 mercer relief valves were installed as additional over-pressure protection at the high pressure cut regulation station. 3. Bruest pilot heaters were installed on the high pressure cut regulation station. 4. New steel enamel building installed over the high pressure cut regulation station to protect heaters from the wind. 5. Mdpe pipe was removed and replace with hdpe. 6. Entire system was retested with air to 155 lbs. 7. Complete station inspections were performed when gas was reintroduced. Gas was reintroduced on 11/25/13. |
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