# Unrestrained Pipe Expansion

Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

## Unrestrained Pipe Expansion formula

 $$\large{ l_{ur} = \frac { \Delta l } { \alpha \; \Delta T } }$$

### Where:

 Units English Metric $$\large{ l_{ur} }$$ = unrestrained pipe length $$ft$$ $$m$$ $$\large{ \Delta l }$$ = pipe length change due to temperature change $$in$$ $$mm$$ $$\large{ \alpha }$$  (Greel symbol alpha) = thermal expansion coefficient $$\large{ \frac{in}{in-F} }$$ $$\large{ \frac{mm}{mm-C} }$$ $$\large{ \Delta T }$$ = temperature differential $$F$$ $$C$$