Energy Institute Guidelines - Speed of Sound Calculations 2

[uaepiping]

Reference is made to the Energy Institute Guidelines for Avoidance of Vibrations section T2.8.3.2, the speed of sound is calculated by equation:

Where,
C = Speed of Sound in liquid (m/s) = To be found
ρ = Fluid density (kg/m3) = 730.9 kg/m3
k = Fluid bulk modulus (N/m2) = 1.3 N/m2 [highlight #EF2929](Assumed Value)[/highlight]
Dext = Pipe outer diameter (m) = 0.324 m
T = Pipe wall thickness (m) = 0.00635 m
Eml = Modulus of Elasticity of pipe material (N/m2) = 2.1 E 11 N/m2
Fluid = Hydrocarbon Liquid
With above formula, I got the value of c as 0.042 m/s.
Now question is that the speed of sound for liquid is in the range of 1200 ~ 1500 m/s, so why I am getting this value? What mistake I am making?

 

[1503-44]

I think you forgot the 1.3 N/m2 x 10^9 Explaining that is gonna be embarrassing.

“What I told you was true ... from a certain point of view.” - Obi-Wan Kenobi, "Return of the Jedi"

 

[uaepiping]

Zounds!
Missed the obvious point.
Yes, that WAS the mistake.
Got speed soound at 1333 m/sec.
Thanks ax1e. Appreciated.

 

[uaepiping]

Dear Piping Engineers,
Any idea when will next edition of EI guidelines be published?