One open angle valve is equivalent to how many meters of str

One open angle valve is equivalent to how many meters of straight 2 in nominal stainless steel pipe for generating frictional resistance? Consider that the pipe has a friction factor of 0.005.

Solution

For a fully open angle valve, the ratio of equivqlent length of straight steel pipe (L_e) to its nominal diameter (D) for generating the same frictional resistance is L_e/D = 154 from standard data of tables.

Here D= 2 \".

L_e = 154 * D

= 154*2

= 308\"

= 308 * 25.4/1000

L_e = 7.82 m