I have 18 meter cube/hr flow what is the pipe size and how calculate it.?

Question

I have 18 meter cube/hr flow what is the pipe size and how calculate it.?

Answer 1

The continuity equation is

Q = AV

Q = Volumetric flow rate (m^3/hr)

A = Inside cross section area of pipe (from which you can calculate diameter A = pi/4 * d^2)

V = Flow velocity (like m/s)

You need to specify (or assume) the flow velocity to be able to calculate pipe diameter.

Answer 2

Assuming this is water then the pipe size depends on the velocity required.

The velocity is dependant on several factors. Do you want laminar flow or turbulent flow? Do you want self cleaning velocity?

The higher the velocity the higher the friction forces and therefore  the higher the pressure  required.

Assuming that you want a flow speed of 1m/sec = 3600m/hr then you want an area of 18 / 3600 m2 = 0.005m2

0.005m2 = PI x D^2/4 where D is the inside diameter of the pipe.

Rearranging

D^2 = 0.005 x 4 / PI

or D = (0.005 x 4 /PI)^0.5

Answer 3

One more data is required. That is pressure in terms of Kg/Sq.Cm. In absence of this information diameter can not be calculated. Refer to fluid mechanics for more details.

Answer 4

the data are not sufficient. there are other information needed like viscosity and the length of the pipe you are designing.

spirax sarco has a very nice procedure (with lots of  examples) for pipe sizing in this URL:

http://www.spiraxsarco.com/resources/ste...