Difference between revisions of "Erosional velocity"

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The flow of a gas-liquid multiphase system may cause erosion if velocities are high. This is the description of empirical relationships for estimating whether erosion will occur in a system at a certain velocity used at [[pqPlot tool]].
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<div style='text-align: right;'>By Mikhail Tuzovskiy on {{REVISIONTIMESTAMP}}</div>
  
As a rule of thump, pipe erosion begins when velocity exceeds the value of C/SQRT(ρ) in ft/s, where ρ = gas density (in lb/ft3) and C = empirical constant (in lb/s/ft2) (starting erosional velocity). We used C=100 as API RP 14E (1984) suggested C=100 for continuous and 125 for non continuous service.
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==Erosional velocity==
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[[Erosional velocity]] is a velocity of the multiphase flow at which pipe erosion occurs.
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===Erosional velocity equation===
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Pipe erosion begins when velocity exceeds the value of  
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:<math>v=\frac{C}{\sqrt{\rho}}</math>
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where:
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:<math> v </math> = gas velocity, ft/s
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:<math> C </math> = empirical constant (starting erosional velocity), lb/s/ft2
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:<math> \rho </math> = gas density, lb/ft3
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API RP 14E (1984) suggested C=100 for continuous and 125 for non continuous service.
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==Erosion==
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Erosion is a loss of original material due to solid particle impact on the material surface.
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Erosion is normally expressed as a rate of metal loss, usually mm/year. It usually occurs in turns or protrusions; or with solids content.
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One can relate [[Erosional velocity]] to a metal loss rate (see RP O501).
  
 
== References ==
 
== References ==
  
 
* Mokhatab S, Poe WA, Speight JG (2006) "Handbook of Natural Gas Transmission and Processing", Section 11.6 - Design Considerations on sales gas pipelines, subsection 11.6.1 - Line Sizing Criteria, Elsevier, 2006.
 
* Mokhatab S, Poe WA, Speight JG (2006) "Handbook of Natural Gas Transmission and Processing", Section 11.6 - Design Considerations on sales gas pipelines, subsection 11.6.1 - Line Sizing Criteria, Elsevier, 2006.
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* [[Media:RP O501 EROSIVE WEAR IN PIPING SYSTEMS.pdf|RECOMMENDED PRACTICE RP O501 EROSIVE WEAR IN PIPING SYSTEMS. REVISION 4.2 - 2007. DET NORSKE VERITAS (pdf)]]
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==See Also==
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*[[Petroleum Engineering]]
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*[[Hydraulic fracturing]]
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*[[Petroleum Engineering Quiz]]
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[[Category:PQplot]]
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[[Category:pengtools]]
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{{#seo:
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|title=Erosional velocity and Erosion
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|titlemode= replace
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|keywords=Erosion, Erosional velocity, pipeline sizing, gas pipeline sizing, flow rate, petroleum engineering
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|description=Erosion is normally expressed as a rate of metal loss, usually mm/year. It usually occurs then flow velocity exceeds erosional velocity.
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}}

Latest revision as of 05:28, 3 January 2023

By Mikhail Tuzovskiy on 20230103052848

Erosional velocity

Erosional velocity is a velocity of the multiphase flow at which pipe erosion occurs.

Erosional velocity equation

Pipe erosion begins when velocity exceeds the value of

v=\frac{C}{\sqrt{\rho}}

where:

 v = gas velocity, ft/s
 C = empirical constant (starting erosional velocity), lb/s/ft2
 \rho = gas density, lb/ft3

API RP 14E (1984) suggested C=100 for continuous and 125 for non continuous service.

Erosion

Erosion is a loss of original material due to solid particle impact on the material surface.

Erosion is normally expressed as a rate of metal loss, usually mm/year. It usually occurs in turns or protrusions; or with solids content.

One can relate Erosional velocity to a metal loss rate (see RP O501).

References

  • Mokhatab S, Poe WA, Speight JG (2006) "Handbook of Natural Gas Transmission and Processing", Section 11.6 - Design Considerations on sales gas pipelines, subsection 11.6.1 - Line Sizing Criteria, Elsevier, 2006.

See Also