Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2015-06-25 — OK
Operator
Oneok Ngl Pipeline, Llc
Cause
Equipment Failure
Commodity
Hvl Or Other Flammable Or Toxic Fluid Which Is A Gas At Ambient Conditions
Program
HL
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$0
Incident datetime
2015-06-25 15:13
Report number
Location
OK
Narrative
Local area operations rep received a call from a landowner stating that a small white vapor cloud had been observed at the capital pump station inside the fence line. While the area rep was enroute to the site he contacted the controller to inform him about the release. The controller informed the rep that there was no pressure loss at the facility and no release had been detected. When the area rep arrived on site he found a small vapor cloud at the pig launcher. After depressurizing the launcher the rep opened the closure door and the o-ring came apart. Updated with investigation results 6/07/2017 n jones cause map narrative ' launcher o-ring failure problem: product release coming from launcher enclosure door and vapor cloud observed by landowner within the fence perimeter of capital pump station. Area of concern: damaged o-ring'why was it damaged? A. Was the o-ring installed correctly? 1. The team interviewed the area rep about the o-ring installation procedure being utilized and determined that the o-ring was installed correctly. It was also determined that removal and inspection of the o-ring each time the closure door is utilized is imperative as well'inspecting the entire o-ring for cuts, blisters, cracks, flat spots, etc' b. Was the proper torque applied when closing the enclosure door? 1. Procedure was reviewed with the rep and it was determined that the appropriate method was used to apply appropriate amount of torque. Solution: ensure tightening/torque procedures are compliant with manufacturers recommended guidelines. Use of spanning wrench or cat tool is highly recommended. C. Did the grease currently being applied to the o-ring have any effect on or lead to any of the damage on the o-ring? 1. Contacted the manufacturer of the lube grease being used (napa lubriplate #105 motor assembly grease). After speaking with the product technician and describing to him our process, products and under what conditions we were applying the grease he suggested that we discontinue using this product. He said that the material is best used on internal machinery parts where temperatures range in excess of 20 degrees. He went on to say that there was the slight possibility that when the cooler temperature of our product came in contact with a larger amount of the lube concentrated in one area that it could have hardened and stuck to the enclosure door. When the closure door was opened it could have removed a portion of the gasket with it...Possibly resulting in the erosion spots and sections being removed from the o-ring. Solution: it was recommended to use a product called 'loc-cease'. D. Understand 'explosive decompression' and increasing decompression time 1. Explosive decompression or gas expansion rupture is caused by high pressure gas trapped within the internal structure of the seal element. Rapid decrease in system pressure causes the trapped gas to expand to match the external pressure and this causes blisters and ruptures on the seal surface. If the volume of trapped gas is small, the blisters may recede as the pressure is equalized with little effect on seal integrity. Excessive trapped gas may cause total destruction of the seal. Solution: increase decompression time to allow trapped gas to work out of seal material. Choose a seal material with good resistance to explosive decompression. E. Is the correct o-ring material being utilized? 1. The o-ring was sent to a lab to be analyzed by our mechanical integrity group but the lab was unable to test this particular product. Solution: use the o-ring material known as fkm (viton). Fkm (viton) is a higher grade material that has been designed to address the specific requirements of high pressure, low temperature gas/liquid applications and is resistant to explosive decompression.
Detailed record list
Report Received Date
2015-07-23 00:00:00
Iyear
2015
Report Number
20150265
Supplemental Number
22379
Report Type
Supplemental Final
Operator Id
32109
Name
Oneok Ngl Pipeline, Llc
Operator Street Address
100 West Fifth Street
Operator City Name
Tulsa
Operator State Abbreviation
OK
Operator Postal Code
74103
Local Datetime
2015-06-25 15:00:00
Location Latitude
45.238011
Location Longitude
-104.199821
Commodity Released Type
Hvl Or Other Flammable Or Toxic Fluid Which Is A Gas At Ambient Conditions
Commodity Subtype
Lpg (Liquefied Petroleum Gas) / Ngl (Natural Gas Liquid)
Unintentional Release Bbls
6
Intentional Release Bbls
3.4
Recovered Bbls
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Notification From Public
Incident Identified Datetime
2015-06-25 15:13:00
System Part Involved
Onshore Pipeline, Including Valve Sites
On Off Shore
Onshore
Shutdown Due Accident Ind
No
Shutdown Explain
Release Occurred At Scraper Trap Launcher. Launcher Was Isolated From Pipeline.
On Site Datetime
2015-06-25 15:13:00
Nrc Rpt Num
Nrc Notification Not Required
Ignite Ind
No
Explode Ind
No
Upstream Valve Type Ind
Remotely Controlled
Downstream Valve Type Ind
Remotely Controlled
Num Pub Evacuated
0
Pipe Fac Name
Oneok Capitol Pump Station (Site #555)
Segment Name
Oneok Bakken Pipeline (Index # 10529)
Onshore State Abbreviation
Mt
Onshore Postal Code
59311
Onshore City Name
Not Within A Municipality
Onshore County Name
Carter
Designated Location
Milepost/valve Station
Designated Name
Scraper Trap
Federal
No
Location Type
Totally Contained On Operator-Controlled Property
Incident Area Type
Aboveground
Incident Area Subtype
Typical Aboveground Facility Piping Or Appurtenance
Crossing
No
Pipe Facility Type
Interstate
Item Involved
Scraper/pig Trap
Installation Year
2014
Material Involved
Material Other Than Carbon Steel
Material Details
O-Ring On Scraper Trap Closure
Release Type
Leak
Leak Type
Other
Leak Type Other
O-Ring On Scraper Trap Closure
Wildlife Impact Ind
No
Soil Contamination
No
Long Term Assessment
No
Remediation Ind
No
Water Contam Ind
No
Could Be Hca
No
Commodity Reached Hca
No
Est Cost Oper Paid
0
Est Cost Gas Released
140
Est Cost Prop Damage
0
Est Cost Emergency
100
Est Cost Environmental
0
Est Cost Other
0
Prpty
240
Accident Psig
1297
Mop Psig
1440
Accident Pressure
Pressure Did Not Exceed Mop
Pressure Restriction Ind
No
Length Segment Isolated
15
Internal Inspection Ind
Yes
Operation Complications Ind
No
Pipeline Function
> 20% Smys Regulated Transmission
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
No
Scada Conf Ind
No
Cpm In Place Ind
Yes
Cpm Operating Ind
Yes
Cpm Functional Ind
Yes
Cpm Detection Ind
No
Cpm Conf Ind
No
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
No controller actions had taken place on the pipeline prior to the release.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Equipment Failure
Cause Details
Non-Threaded Connection Failure
Eq Failure Type
Non-Threaded Connection Failure
Other Non Threaded Ind
O-Ring
Eq Additional Other Ind
Yes
Eq Additional Other Details
Cause Of O-Ring Failure Is Under Investigation
Preparer Name
N*** J****
Preparer Title
Regulatory Compliance Coordinator
Preparer Email
N*********@o****.com
Preparer Telephone
580-395-6304
Preparer Fax
580-395-2933
Prepared Date
2017-06-07 00:00:00
Authorizer Name
N*** J****
Authorizer Telephone
580-395-6304
Authorizer Title
Regulatory Compliance Coordinator
Authorizer Email
N*********@o****.com
Narrative
Local area operations rep received a call from a landowner stating that a small white vapor cloud had been observed at the capital pump station inside the fence line. While the area rep was enroute to the site he contacted the controller to inform him about the release. The controller informed the rep that there was no pressure loss at the facility and no release had been detected. When the area rep arrived on site he found a small vapor cloud at the pig launcher. After depressurizing the launcher the rep opened the closure door and the o-ring came apart. Updated with investigation results 6/07/2017 n jones cause map narrative ' launcher o-ring failure problem: product release coming from launcher enclosure door and vapor cloud observed by landowner within the fence perimeter of capital pump station. Area of concern: damaged o-ring'why was it damaged? A. Was the o-ring installed correctly? 1. The team interviewed the area rep about the o-ring installation procedure being utilized and determined that the o-ring was installed correctly. It was also determined that removal and inspection of the o-ring each time the closure door is utilized is imperative as well'inspecting the entire o-ring for cuts, blisters, cracks, flat spots, etc' b. Was the proper torque applied when closing the enclosure door? 1. Procedure was reviewed with the rep and it was determined that the appropriate method was used to apply appropriate amount of torque. Solution: ensure tightening/torque procedures are compliant with manufacturers recommended guidelines. Use of spanning wrench or cat tool is highly recommended. C. Did the grease currently being applied to the o-ring have any effect on or lead to any of the damage on the o-ring? 1. Contacted the manufacturer of the lube grease being used (napa lubriplate #105 motor assembly grease). After speaking with the product technician and describing to him our process, products and under what conditions we were applying the grease he suggested that we discontinue using this product. He said that the material is best used on internal machinery parts where temperatures range in excess of 20 degrees. He went on to say that there was the slight possibility that when the cooler temperature of our product came in contact with a larger amount of the lube concentrated in one area that it could have hardened and stuck to the enclosure door. When the closure door was opened it could have removed a portion of the gasket with it...Possibly resulting in the erosion spots and sections being removed from the o-ring. Solution: it was recommended to use a product called 'loc-cease'. D. Understand 'explosive decompression' and increasing decompression time 1. Explosive decompression or gas expansion rupture is caused by high pressure gas trapped within the internal structure of the seal element. Rapid decrease in system pressure causes the trapped gas to expand to match the external pressure and this causes blisters and ruptures on the seal surface. If the volume of trapped gas is small, the blisters may recede as the pressure is equalized with little effect on seal integrity. Excessive trapped gas may cause total destruction of the seal. Solution: increase decompression time to allow trapped gas to work out of seal material. Choose a seal material with good resistance to explosive decompression. E. Is the correct o-ring material being utilized? 1. The o-ring was sent to a lab to be analyzed by our mechanical integrity group but the lab was unable to test this particular product. Solution: use the o-ring material known as fkm (viton). Fkm (viton) is a higher grade material that has been designed to address the specific requirements of high pressure, low temperature gas/liquid applications and is resistant to explosive decompression.
| Report Received Date | 2015-07-23 00:00:00 |
|---|---|
| Iyear | 2015 |
| Report Number | 20150265 |
| Supplemental Number | 22379 |
| Report Type | Supplemental Final |
| Operator Id | 32109 PHMSA Enforcement |
| Name | Oneok Ngl Pipeline, Llc |
| Operator Street Address | 100 West Fifth Street |
| Operator City Name | Tulsa |
| Operator State Abbreviation | OK |
| Operator Postal Code | 74103 |
| Local Datetime | 2015-06-25 15:00:00 |
| Location Latitude | 45.238011 Google Maps OpenStreetMap |
| Location Longitude | -104.199821 Google Maps OpenStreetMap |
| Commodity Released Type | Hvl Or Other Flammable Or Toxic Fluid Which Is A Gas At Ambient Conditions |
| Commodity Subtype | Lpg (Liquefied Petroleum Gas) / Ngl (Natural Gas Liquid) |
| Unintentional Release Bbls | 6 |
| Intentional Release Bbls | 3.4 |
| Recovered Bbls | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Notification From Public |
| Incident Identified Datetime | 2015-06-25 15:13:00 |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| On Off Shore | Onshore |
| Shutdown Due Accident Ind | No |
| Shutdown Explain | Release Occurred At Scraper Trap Launcher. Launcher Was Isolated From Pipeline. |
| On Site Datetime | 2015-06-25 15:13:00 |
| Nrc Rpt Num | Nrc Notification Not Required NRC Report How to search |
| Ignite Ind | No |
| Explode Ind | No |
| Upstream Valve Type Ind | Remotely Controlled |
| Downstream Valve Type Ind | Remotely Controlled |
| Num Pub Evacuated | 0 |
| Pipe Fac Name | Oneok Capitol Pump Station (Site #555) |
| Segment Name | Oneok Bakken Pipeline (Index # 10529) |
| Onshore State Abbreviation | Mt |
| Onshore Postal Code | 59311 |
| Onshore City Name | Not Within A Municipality |
| Onshore County Name | Carter |
| Designated Location | Milepost/valve Station |
| Designated Name | Scraper Trap |
| Federal | No |
| Location Type | Totally Contained On Operator-Controlled Property |
| Incident Area Type | Aboveground |
| Incident Area Subtype | Typical Aboveground Facility Piping Or Appurtenance |
| Crossing | No |
| Pipe Facility Type | Interstate |
| Item Involved | Scraper/pig Trap |
| Installation Year | 2014 |
| Material Involved | Material Other Than Carbon Steel |
| Material Details | O-Ring On Scraper Trap Closure |
| Release Type | Leak |
| Leak Type | Other |
| Leak Type Other | O-Ring On Scraper Trap Closure |
| Wildlife Impact Ind | No |
| Soil Contamination | No |
| Long Term Assessment | No |
| Remediation Ind | No |
| Water Contam Ind | No |
| Could Be Hca | No |
| Commodity Reached Hca | No |
| Est Cost Oper Paid | 0 |
| Est Cost Gas Released | 140 |
| Est Cost Prop Damage | 0 |
| Est Cost Emergency | 100 |
| Est Cost Environmental | 0 |
| Est Cost Other | 0 |
| Prpty | 240 |
| Accident Psig | 1297 |
| Mop Psig | 1440 |
| Accident Pressure | Pressure Did Not Exceed Mop |
| Pressure Restriction Ind | No |
| Length Segment Isolated | 15 |
| Internal Inspection Ind | Yes |
| Operation Complications Ind | No |
| Pipeline Function | > 20% Smys Regulated Transmission |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | No |
| Scada Conf Ind | No |
| Cpm In Place Ind | Yes |
| Cpm Operating Ind | Yes |
| Cpm Functional Ind | Yes |
| Cpm Detection Ind | No |
| Cpm Conf Ind | No |
| 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 | No controller actions had taken place on the pipeline prior to the release. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Equipment Failure |
| Cause Details | Non-Threaded Connection Failure |
| Eq Failure Type | Non-Threaded Connection Failure |
| Other Non Threaded Ind | O-Ring |
| Eq Additional Other Ind | Yes |
| Eq Additional Other Details | Cause Of O-Ring Failure Is Under Investigation |
| Preparer Name | N*** J**** |
| Preparer Title | Regulatory Compliance Coordinator |
| Preparer Email | N*********@o****.com |
| Preparer Telephone | 580-395-6304 |
| Preparer Fax | 580-395-2933 |
| Prepared Date | 2017-06-07 00:00:00 |
| Authorizer Name | N*** J**** |
| Authorizer Telephone | 580-395-6304 |
| Authorizer Title | Regulatory Compliance Coordinator |
| Authorizer Email | N*********@o****.com |
| Narrative | Local area operations rep received a call from a landowner stating that a small white vapor cloud had been observed at the capital pump station inside the fence line. While the area rep was enroute to the site he contacted the controller to inform him about the release. The controller informed the rep that there was no pressure loss at the facility and no release had been detected. When the area rep arrived on site he found a small vapor cloud at the pig launcher. After depressurizing the launcher the rep opened the closure door and the o-ring came apart. Updated with investigation results 6/07/2017 n jones cause map narrative ' launcher o-ring failure problem: product release coming from launcher enclosure door and vapor cloud observed by landowner within the fence perimeter of capital pump station. Area of concern: damaged o-ring'why was it damaged? A. Was the o-ring installed correctly? 1. The team interviewed the area rep about the o-ring installation procedure being utilized and determined that the o-ring was installed correctly. It was also determined that removal and inspection of the o-ring each time the closure door is utilized is imperative as well'inspecting the entire o-ring for cuts, blisters, cracks, flat spots, etc' b. Was the proper torque applied when closing the enclosure door? 1. Procedure was reviewed with the rep and it was determined that the appropriate method was used to apply appropriate amount of torque. Solution: ensure tightening/torque procedures are compliant with manufacturers recommended guidelines. Use of spanning wrench or cat tool is highly recommended. C. Did the grease currently being applied to the o-ring have any effect on or lead to any of the damage on the o-ring? 1. Contacted the manufacturer of the lube grease being used (napa lubriplate #105 motor assembly grease). After speaking with the product technician and describing to him our process, products and under what conditions we were applying the grease he suggested that we discontinue using this product. He said that the material is best used on internal machinery parts where temperatures range in excess of 20 degrees. He went on to say that there was the slight possibility that when the cooler temperature of our product came in contact with a larger amount of the lube concentrated in one area that it could have hardened and stuck to the enclosure door. When the closure door was opened it could have removed a portion of the gasket with it...Possibly resulting in the erosion spots and sections being removed from the o-ring. Solution: it was recommended to use a product called 'loc-cease'. D. Understand 'explosive decompression' and increasing decompression time 1. Explosive decompression or gas expansion rupture is caused by high pressure gas trapped within the internal structure of the seal element. Rapid decrease in system pressure causes the trapped gas to expand to match the external pressure and this causes blisters and ruptures on the seal surface. If the volume of trapped gas is small, the blisters may recede as the pressure is equalized with little effect on seal integrity. Excessive trapped gas may cause total destruction of the seal. Solution: increase decompression time to allow trapped gas to work out of seal material. Choose a seal material with good resistance to explosive decompression. E. Is the correct o-ring material being utilized? 1. The o-ring was sent to a lab to be analyzed by our mechanical integrity group but the lab was unable to test this particular product. Solution: use the o-ring material known as fkm (viton). Fkm (viton) is a higher grade material that has been designed to address the specific requirements of high pressure, low temperature gas/liquid applications and is resistant to explosive decompression. |
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