# Pipeline Parameter

Written by Jerry Ratzlaff on . Posted in Dimensionless Numbers

Pipeline parameter, abbreviated as $$\rho$$, a dimensionless number, is proportional to maximum water hammer pressure rise and static pressure.

## Pipeline Parameter formula

$$\large{ \rho = \frac {v\;v_i} {2\;g\;h_s} }$$
Symbol English Metric
$$\large{ \rho }$$  (Greek symbol rho) =  pipeline parameter $$\large{dimensionless}$$
$$\large{ g }$$ = gravitational acceleration  $$\large{\frac{ft}{sec^2}}$$ $$\large{\frac{m}{s^2}}$$
$$\large{ v_i }$$ = initial velocity $$\large{\frac{ft}{sec}}$$ $$\large{\frac{m}{s}}$$
$$\large{ v }$$ = wave velocity $$\large{\frac{ft}{sec}}$$ $$\large{\frac{m}{s}}$$
$$\large{ h_s }$$ = static head $$\large{ft}$$ $$\large{m}$$