Saturated steam at $200 mathrm{psig}left(388^{circ} mathrm{F} ight.$, specific volume, $left.u=2.13 mathrm{ft}^{3} / mathrm{lb}_{mathrm{m}}, mu=0.015 mathrm{cP} ight)$ is

Saturated steam at $200 \mathrm{psig}\left(388^{\circ} \mathrm{F}\right.$, specific volume, $\left.u=2.13 \mathrm{ft}^{3} / \mathrm{lb}_{\mathrm{m}}, \mu=0.015 \mathrm{cP}\right)$ is fed from a header to a direct contact evaporator that operates at $10 \mathrm{psig}$. If the steam line is 2 in. sch 40 pipe, $50 \mathrm{ft}$ long, and includes four flanged elbows and one globe valve, what is the steam flow rate in $\mathrm{lb}_{\mathrm{m}} / \mathrm{h}$ ?