Posted by Alexis Machuca on October 16, 2001 at 08:50:58:

In Reply to: Re: steam velocity calculation posted by Jeff on March 24, 2000 at 17:48:57:

:

: : How do you determine steam velocity if the only givens are steam pressure and lbs/hr flow rate?

: : This question arose from a problem presented in a class. We were to determine the size pipe required for 100 psi 4800 lbs/hr flow rate with the assumption that steam velocity was 5280 ft/min. I've asked several people who tell me if they knew the pipe size.

: : the pipefitters hand book says engineers make the assumption that steam travels at 1 1/2 miles per minute. Very often it is much more.

: Dave:

: As you posed the initial question, you can not figure out the steam velocity (I assume flowing through a pipe) with only knowing the mass flow rate and pressure. You do need to know the cross sectional area that it flows through. Otherwise, you have one equation with two unknowns. Now the problem that was posed in class assumed a value for velocity of steam and you calculated the pipe size, but I don't think these are the same two problems. Are they?