1 reply to this topic

[Lorean]

I have to size line system, firewater system. I have several questions. I have default sizing datasheet. 1)-do we add valve, fittings length to the pipe length? Do we add hydrant lenght, pipe branch length to the pipe length? In datasheet i have special fitting sections, so i ll add valves there for pressure drop. But should i add the valves length to the total length?2) - I have excell datasheet, and there i can only calculate every line individually. How can i size whole system?how to interconnect them, please help.

[Asgar]

Hi

For doing line size study or hydraulics,I need add all the fittings,
1. if u added valves in the sizing sheet,no need the valve length ,because it itself calculates the L/D equavalent length Refer Darcy friction factor equation and fittings for your info
2.regarding Your question of Calculating whole line size,is this is pump suction or discharge, there will be criteria for both accordingly u should size considering pressure losses,give the inlet pressure at the start,u get the final pressure at the end of sheet,link that to next , thereby u get the initial pressure for the next section,that's how u calculate