Bill Huston's better PIR Calculation for Natural Gas Pipelines
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(Edison NJ '94, Carlsbad NM '00, Appomattix VA '08, Cleburne TX '10, San Bruno CA '10, Sissonville WV '12, Salem Pa '16)
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This is a way to estimate the upper-bound of impacts, not necessarily *typical* impacts.
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This is solely my work. NO WARRANTY IS MADE for the quality of these estimates!
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Use this information at your own risk! (Although these numbers are FAR BETTER than what PHMSA uses!)
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Version:0.2 Beta
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AUTHOR Contact: WilliamAHuston@gmail.com
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This page:
http://tinyurl.com/BHBetterPIR
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MORE INFO:
http://williamahuston.blogspot.com/2016/06/bhs-preliminary-comments-on-phmsa.html
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Instructions for using this tool:
ENTER HERE:Examples:
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Step 1:Enter the MAOP of your pipeline:1480psi1480850144014407501440144095085014401480
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Step 2:Enter the Diameter of your pipeline:42inches424230423030361816424236
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Step 3:Enter Name of Pipeline
Permian Highway
Atlantic SunriseAIMConstitutionACPAlgonquinTexas Eastern at SalemACP (NC)Adelphiagranite bridgeAtlantic bridge
Permian Highway
Penn East
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This tool is designed to be most accurate with Natural Gas transmission lines 24" in diameter or greater, and pressures of 600 psig and above.
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This tool is NOT designed for small (under 20") and low pressure (under 300 psi) distribution lines
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Step 4: Read your results below:
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Potential Impact Radius (PIR) according to
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Flawed PHMSA formula:
1115ft
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Definitions:
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MAJOR IMPACTS are defined by scorched earth, major structural damage to buildings, life-threatening injury or death to livestock, vegetation, and humans.
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MINOR IMPACTS are those which could cause minor, non-life threatening injury to persons, or for structures, impacts which could result in an insurance claim, like melted siding.
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Estimated Major Impact Radius method A (Max observed)
1400ft
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Estimated Major Impact Radius method B (PIR * 1.7)
1895ft
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Estimated Major Impact Radius method C (PIR + 595)
1710ft
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ESTIMATED MAJOR IMPACT RADIUS
1895ft
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(max of above)
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MINOR IMPACTS could be any damage which could result
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an insurance claim, such as warped siding.
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Estimated Minor Impacts Radius method D (Max observered)
2200ft
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Estimated Minor Impacts Radius method E (PIR * 3.3)
3679ft
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Estimated Minor Impacts Radius method F (PIR+1400)
2515ft
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ESTIMATED MINOR IMPACT RADIUS
3679ft
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(max of above)
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PLEASE NOTE that if your pipeline is greater than 36", these numbers may be low.
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This is because my source data lacks information about 42" failures and above.
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12.26333333
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6.316666667
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36" Cleburne
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to Craig
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Revision Notes:
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Name of Pipeline:
Permian Highway
0.2
added warning: Tool Designed for large high pressure transmission lines
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Diameter:42inches
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MAOP:1480psi
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Version number:0.2 Beta
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