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erosion velocity in pipe formula. The most important factor in piping design is hydraulic calculation or calculation of required diameter for give flow.
Today we will learn more about erosion, corrosion and difference between corrosion and erosion, how to evaluate velocity (erosion v ), erosion velocity in pipe formula with an example. If you dot know the difference between pipe and tube please read our article on it.
What is erosion velocity for water ?
The erosional velocity for water is 3.5 m/sec.
What is erosion ?
What is corrosion ?
Corrosion is chemical process which is happens due to the presence of non compactible chemical.
What is the main factor which cause the corrosion ?
The main factors are wrong MOC selection, due to wrong MOC selection chemical corrode the pipe.
Erosion is nothing but the process in which the pipe is get damaged internally due do some reasons like particles in transporting fluid, bubbling, very high velocity of transporting fluid, if there is transporting material is not compactible with pipe material of construction(MOC).
Erosion
Before to study about what is erosion velocity we need to study about what is erosion, how it occurs, the most important factor for erosion, how erosion and velocity are related.
Difference between erosion and corrosion
Erosion and corrosion both are the process which damage the pipe. but there is very big difference in between them. Difference is very easy to understand. Erosion is a physical process i which pipe is get damaged due to some physical factors like excess of velocity, particles in liquid and bubbling of liquid.
Corrosion is a process i which pipe is get damaged due to the chemical compatibility. As like erosion here there are o physical factors which damage the pipe. Here pipe is get damaged only because chemical which corrode the pipe. So to avoid the corrosion we need to choose the correct material of construction ( i. e. MOC of pipe) as per material compatibly chart at the required pressure and temperature and as per compassion or purity of fluid.
erosion velocity in pipe formula
To avoid the erosion in pipe we need to design the pipe bellow erosional velocity limit. In the calculation of lie sizing or pipe diameter we need consider the velocity of flowing fluid. To calculate the e velocity we use following formula. Erosional velocity is inversible proportional to the density of fluid.
errosional velocity ,
C/Square root of density,
where ,
C is erosional velocity c-factor,
erosional velocity c-factor
The factor value is depends o some condition like where process is batch or continuous.
C- 100 for batch ad C- 125 for continuous.
Example of erosion
Suppose in line sizing of water for a particular flow, if we consider the velocity which is greter than erosional velocity the pipe will get damage inside in few days or life pipe is get reduce.
Factors affect the erosion
The main factors which affect the erosion are,
- Material compatibility
- Velocity
- Solid particle content in liquid
- bubbling of liquid
Conclusion
In line sizing calculation or procedure it is very important two know what is er velocity. Knowing the value of it we ca avoid the damage in the pipe. This article cover the basic and advance about erosion ad corrosion. Erosion is physical process ad corrosion is chemical process. To avoid the corrosion use material compatibility chart and to avoid the erosion do line sizing bellow er velocity.
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