Incident details
Operator, cause, commodity and consequences with raw source fields.
HL incident on 2016-09-22 — OK
Operator
Magellan Ammonia Pipeline, L.p.
Cause
Corrosion 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)
$68,000
Incident datetime
2016-09-22 12:48
Report number
Location
OK
Narrative
At approximately 11:00 a third party surveyor working for magellan called operations control to report dead vegetation on the verdigris lateral anhydrous ammonia pipeline at m.P. 90.64. Operations control initiated an investigation event, shut down the line and notified local magellan technicians to go to the location and investigate. At approximately 12:48 the technicians confirmed the dead vegetation and ammonia odor in the soil. At approximately 16:00 the magellan area supervisor arrived on scene with contractor personnel. The area was safely excavated and the leak was located and identified as a small corrosion pinhole. The release was stopped by 21:00 with the installation of a plidco repair sleeve and made permanent by fully welding the plidco repair sleeve according to the repair plan approved by PHMSA. Prior to the release an mfl tool run had been completed and was under vendor analysis. The tool run identified the release location as 31% deep external metal loss. Based on the ili data analysis following the release, 15 additional rehabilitation locations were added to the rehabilitation plan. The results from the release and rehabilitation schedule will be integrated into the integrity management plan during the risk analysis process. As part of the ili analysis of smart tool data for similar coated lines, all metal loss features are grown and considered for rehabilitation or a shorten reassessment interval. As part of the ili analysis, metal loss features within 6' of the girth weld on similar coated lines are also reviewed and considered for rehabilitation. Approximately 250 cubic yards of nh3 impacted soil was excavated and properly remediated. Supplemental updating narrative part h.
Detailed record list
Report Received Date
2016-10-14 00:00:00
Iyear
2016
Report Number
20160328
Supplemental Number
22389
Report Type
Supplemental Final
Operator Id
12105
Name
Magellan Ammonia Pipeline, L.p.
Operator Street Address
One Williams Center, Md 28
Operator City Name
Tulsa
Operator State Abbreviation
OK
Operator Postal Code
74172
Local Datetime
2016-09-22 12:48:00
Location Latitude
36.29392
Location Longitude
-96.20295
Commodity Released Type
Hvl Or Other Flammable Or Toxic Fluid Which Is A Gas At Ambient Conditions
Commodity Subtype
Anhydrous Ammonia
Unintentional Release Bbls
5
Intentional Release Bbls
0
Recovered Bbls
4.9
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Accident Identifier
Other
Accident Details
Contract Surveyor Working For Magellan
Incident Identified Datetime
2016-09-22 12:48:00
System Part Involved
Onshore Pipeline, Including Valve Sites
On Off Shore
Onshore
Shutdown Due Accident Ind
Yes
Shutdown Datetime
2016-09-22 10:48:00
Restart Datetime
2016-09-24 12:40:00
On Site Datetime
2016-09-22 12:48:00
Nrc Rpt Datetime
2016-09-22 13:02:00
Nrc Rpt Num
1159693
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
Verdigris Lateral Nh3
Segment Name
Line Id 518
Onshore State Abbreviation
Ok
Onshore Postal Code
74060
Onshore City Name
Not Within A Municipality
Onshore County Name
Osage
Designated Location
Milepost/valve Station
Designated Name
90.64
Federal
No
Location Type
Pipeline Right-Of-Way
Incident Area Type
Underground
Incident Area Subtype
Under Soil
Depth Of Cover
48
Crossing
No
Pipe Facility Type
Interstate
Item Involved
Pipe
Pipe Type
Pipe Body
Pipe Diameter
6
Pipe Wall Thickness
0.141
Pipe Smys
46000
Pipe Specification
Api 5l X-46
Pipe Seam Type
Erw - High Frequency
Pipe Manufacturer
Us Steel
Pipe Coating Type
Cold Applied Tape
Installation Year
1976
Manufactured Year
1976
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Pinhole
Wildlife Impact Ind
No
Soil Contamination
Yes
Long Term Assessment
No
Remediation Ind
Yes
Soil Remed Ind
Yes
Water Contam Ind
No
Could Be Hca
Yes
Commodity Reached Hca
No
Est Cost Oper Paid
3000
Est Cost Gas Released
400
Est Cost Prop Damage
68000
Est Cost Emergency
34500
Est Cost Environmental
0
Est Cost Other
0
Prpty
105900
Accident Psig
467
Mop Psig
1361
Accident Pressure
Pressure Did Not Exceed Mop
Pressure Restriction Ind
No
Length Segment Isolated
339926
Internal Inspection Ind
Yes
Operation Complications Ind
Yes
Incompat Commod Ind
Yes
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
Pipeline was steady state when a land surveyor saw a dead vegetation spot over the right of way. Also, there were no system indications (scada pressures/flows, cpm) of a release. In addition, the controller performed no operations on the pipeline to cause a release and did not respond to any alarms or abnormal operations.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Corrosion Failure
Cause Details
External Corrosion
Internal External
External Corrosion
Visual Exam Results
Localized Pitting
Galvanic Corrosion Ind
Yes
Field Exam Basis Ind
Yes
Underground Location
Yes
Under Cathodic Protection Ind
Yes
Cathodic Pro Start Year
1977
Shielding Evident
Yes
Cathodic Survey Type
Yes
Cp Annual Survey Ind
Yes
Cp Annual Survey Year
2016
Prior Damage
Yes
Collected Data Ind
Yes
Axial Magnetic Flx Lkg Ind
Yes
Geometry Deformation Ind
Yes
Axial Recent Year
2016
Geometry Recent Year
2016
Has Hydrtst Conduc Before Ind
Yes
Hydrtst Most Rcnt Year
2010
Hydrtst Most Rcnt Pressure
1815
Direct Asmnt Conducted
No
Non Destructive Exam Ind
No
Preparer Name
S****** L******
Preparer Title
Ai Analyst
Preparer Email
S***************@m*********.com
Preparer Telephone
918-574-7327
Preparer Fax
918-574-7376
Prepared Date
2017-06-08 00:00:00
Authorizer Name
S****** L******
Authorizer Telephone
918-574-7327
Authorizer Title
Ai Analyst
Authorizer Email
S**************@m*********.com
Narrative
At approximately 11:00 a third party surveyor working for magellan called operations control to report dead vegetation on the verdigris lateral anhydrous ammonia pipeline at m.P. 90.64. Operations control initiated an investigation event, shut down the line and notified local magellan technicians to go to the location and investigate. At approximately 12:48 the technicians confirmed the dead vegetation and ammonia odor in the soil. At approximately 16:00 the magellan area supervisor arrived on scene with contractor personnel. The area was safely excavated and the leak was located and identified as a small corrosion pinhole. The release was stopped by 21:00 with the installation of a plidco repair sleeve and made permanent by fully welding the plidco repair sleeve according to the repair plan approved by PHMSA. Prior to the release an mfl tool run had been completed and was under vendor analysis. The tool run identified the release location as 31% deep external metal loss. Based on the ili data analysis following the release, 15 additional rehabilitation locations were added to the rehabilitation plan. The results from the release and rehabilitation schedule will be integrated into the integrity management plan during the risk analysis process. As part of the ili analysis of smart tool data for similar coated lines, all metal loss features are grown and considered for rehabilitation or a shorten reassessment interval. As part of the ili analysis, metal loss features within 6' of the girth weld on similar coated lines are also reviewed and considered for rehabilitation. Approximately 250 cubic yards of nh3 impacted soil was excavated and properly remediated. Supplemental updating narrative part h.
| Report Received Date | 2016-10-14 00:00:00 |
|---|---|
| Iyear | 2016 |
| Report Number | 20160328 |
| Supplemental Number | 22389 |
| Report Type | Supplemental Final |
| Operator Id | 12105 PHMSA Enforcement |
| Name | Magellan Ammonia Pipeline, L.p. |
| Operator Street Address | One Williams Center, Md 28 |
| Operator City Name | Tulsa |
| Operator State Abbreviation | OK |
| Operator Postal Code | 74172 |
| Local Datetime | 2016-09-22 12:48:00 |
| Location Latitude | 36.29392 Google Maps OpenStreetMap |
| Location Longitude | -96.20295 Google Maps OpenStreetMap |
| Commodity Released Type | Hvl Or Other Flammable Or Toxic Fluid Which Is A Gas At Ambient Conditions |
| Commodity Subtype | Anhydrous Ammonia |
| Unintentional Release Bbls | 5 |
| Intentional Release Bbls | 0 |
| Recovered Bbls | 4.9 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Accident Identifier | Other |
| Accident Details | Contract Surveyor Working For Magellan |
| Incident Identified Datetime | 2016-09-22 12:48:00 |
| System Part Involved | Onshore Pipeline, Including Valve Sites |
| On Off Shore | Onshore |
| Shutdown Due Accident Ind | Yes |
| Shutdown Datetime | 2016-09-22 10:48:00 |
| Restart Datetime | 2016-09-24 12:40:00 |
| On Site Datetime | 2016-09-22 12:48:00 |
| Nrc Rpt Datetime | 2016-09-22 13:02:00 |
| Nrc Rpt Num | 1159693 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 | Verdigris Lateral Nh3 |
| Segment Name | Line Id 518 |
| Onshore State Abbreviation | Ok |
| Onshore Postal Code | 74060 |
| Onshore City Name | Not Within A Municipality |
| Onshore County Name | Osage |
| Designated Location | Milepost/valve Station |
| Designated Name | 90.64 |
| Federal | No |
| Location Type | Pipeline Right-Of-Way |
| Incident Area Type | Underground |
| Incident Area Subtype | Under Soil |
| Depth Of Cover | 48 |
| Crossing | No |
| Pipe Facility Type | Interstate |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Pipe Diameter | 6 |
| Pipe Wall Thickness | 0.141 |
| Pipe Smys | 46000 |
| Pipe Specification | Api 5l X-46 |
| Pipe Seam Type | Erw - High Frequency |
| Pipe Manufacturer | Us Steel |
| Pipe Coating Type | Cold Applied Tape |
| Installation Year | 1976 |
| Manufactured Year | 1976 |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Pinhole |
| Wildlife Impact Ind | No |
| Soil Contamination | Yes |
| Long Term Assessment | No |
| Remediation Ind | Yes |
| Soil Remed Ind | Yes |
| Water Contam Ind | No |
| Could Be Hca | Yes |
| Commodity Reached Hca | No |
| Est Cost Oper Paid | 3000 |
| Est Cost Gas Released | 400 |
| Est Cost Prop Damage | 68000 |
| Est Cost Emergency | 34500 |
| Est Cost Environmental | 0 |
| Est Cost Other | 0 |
| Prpty | 105900 |
| Accident Psig | 467 |
| Mop Psig | 1361 |
| Accident Pressure | Pressure Did Not Exceed Mop |
| Pressure Restriction Ind | No |
| Length Segment Isolated | 339926 |
| Internal Inspection Ind | Yes |
| Operation Complications Ind | Yes |
| Incompat Commod Ind | Yes |
| 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 | Pipeline was steady state when a land surveyor saw a dead vegetation spot over the right of way. Also, there were no system indications (scada pressures/flows, cpm) of a release. In addition, the controller performed no operations on the pipeline to cause a release and did not respond to any alarms or abnormal operations. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Corrosion Failure |
| Cause Details | External Corrosion |
| Internal External | External Corrosion |
| Visual Exam Results | Localized Pitting |
| Galvanic Corrosion Ind | Yes |
| Field Exam Basis Ind | Yes |
| Underground Location | Yes |
| Under Cathodic Protection Ind | Yes |
| Cathodic Pro Start Year | 1977 |
| Shielding Evident | Yes |
| Cathodic Survey Type | Yes |
| Cp Annual Survey Ind | Yes |
| Cp Annual Survey Year | 2016 |
| Prior Damage | Yes |
| Collected Data Ind | Yes |
| Axial Magnetic Flx Lkg Ind | Yes |
| Geometry Deformation Ind | Yes |
| Axial Recent Year | 2016 |
| Geometry Recent Year | 2016 |
| Has Hydrtst Conduc Before Ind | Yes |
| Hydrtst Most Rcnt Year | 2010 |
| Hydrtst Most Rcnt Pressure | 1815 |
| Direct Asmnt Conducted | No |
| Non Destructive Exam Ind | No |
| Preparer Name | S****** L****** |
| Preparer Title | Ai Analyst |
| Preparer Email | S***************@m*********.com |
| Preparer Telephone | 918-574-7327 |
| Preparer Fax | 918-574-7376 |
| Prepared Date | 2017-06-08 00:00:00 |
| Authorizer Name | S****** L****** |
| Authorizer Telephone | 918-574-7327 |
| Authorizer Title | Ai Analyst |
| Authorizer Email | S**************@m*********.com |
| Narrative | At approximately 11:00 a third party surveyor working for magellan called operations control to report dead vegetation on the verdigris lateral anhydrous ammonia pipeline at m.P. 90.64. Operations control initiated an investigation event, shut down the line and notified local magellan technicians to go to the location and investigate. At approximately 12:48 the technicians confirmed the dead vegetation and ammonia odor in the soil. At approximately 16:00 the magellan area supervisor arrived on scene with contractor personnel. The area was safely excavated and the leak was located and identified as a small corrosion pinhole. The release was stopped by 21:00 with the installation of a plidco repair sleeve and made permanent by fully welding the plidco repair sleeve according to the repair plan approved by PHMSA. Prior to the release an mfl tool run had been completed and was under vendor analysis. The tool run identified the release location as 31% deep external metal loss. Based on the ili data analysis following the release, 15 additional rehabilitation locations were added to the rehabilitation plan. The results from the release and rehabilitation schedule will be integrated into the integrity management plan during the risk analysis process. As part of the ili analysis of smart tool data for similar coated lines, all metal loss features are grown and considered for rehabilitation or a shorten reassessment interval. As part of the ili analysis, metal loss features within 6' of the girth weld on similar coated lines are also reviewed and considered for rehabilitation. Approximately 250 cubic yards of nh3 impacted soil was excavated and properly remediated. Supplemental updating narrative part h. |
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