Difference between revisions of "Erosional velocity"
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==Erosional velocity== | ==Erosional velocity== | ||
| − | + | [[Erosional velocity]] is a velocity of the multiphase flow at which pipe erosion occurs. | |
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| + | ===Erosional velocity equation=== | ||
| + | Pipe erosion begins when velocity exceeds the value of | ||
| + | :<math>v=\frac{C}{\sqrt{\rho}}</math> | ||
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| + | 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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| + | This is the empirical relationships for estimating whether erosion will occur in a system at a certain velocity used at [[:Category:PQplot|PQplot]]. | ||
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==Erosion== | ==Erosion== | ||
Revision as of 07:50, 27 April 2020
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
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.
This is the empirical relationships for estimating whether erosion will occur in a system at a certain velocity used at PQplot.
Erosion
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.
