"Design three$-$phase horizontal separator with a weir to separate the mixture. The operating pressure and temperature are $25$ psig and $100,$ respectively and it is necessary to have a liquid holdup and surge time of $20$min. Use SA $51670$ steel with design temperature $650C,$ stress value $17500$ and corrosion allowance of $\frac{1}{16}$ inch. Also give recommendation if the design is valid."

$\backslash$table$[[$Component$,$Mass flow $1\frac{b}{h},$Density $l\frac{b}{f}{t}^3,$Viscosity $cP$