Steam velocity in Pipe

[RobBrit]

I've been given the task of finding the velocity of steam in a pipe. But without the dryness fraction or specific volume given.

Given: Mass of water (565kg/s) (power station)
Pressure: 159.5
Temperature 565 degrees C
260mm inner bore of pipe. csa 0.056m^2)

Also the force of this steam on a 90degree swept bend with bend radius of 840mm twice the outer bore diameter

 

[ione]

It’s a hard task without knowing the unit used for pressure and whether pressure is intended “gauge” or “absolute”.

Let’s assume you are talking about 159.5 barg at 565 °C temperature. Then you’re dealing with superheated steam (no mystery dryness is not specified). With those info and from steam tables you will find the superheated specific volume is 0.0218318 m^3/kg and then it should be easy (or at least easier).

Take a look here for second question

http://www.engineeringtoolbox.com/forces-pipe-bends-d_968.html

 

[RobBrit]

Yeh sorry its bar g for pressure, i was getting 0.009966, for specific volume of saturated steam.

Now i see there is a table for superheated steam..thats helped alot.

Thanks alot.

Rob