laboratory gas reticulation sizing

[nicolai]

Hi there
what would be suggested guideline to follow for a gas reticulation in a laboratory environment to distribute gas consisting of Nitrogen Hydrogen, Argon and instrument air to the various lab equipment
the total instantaneous flow of Nitrogen is expected at 350 ml/min. Is max flow velocity the governing factor?
what formulas is recommended to calculate flow velocity and pressure loss? what is safe maximum flow velocities for gasses applicable.

thks for any assistance

 

[MortenA]

your choice of pipe ID is probably limited (or maybe its glass/silicone hoses?) i dont think you need to worry about sizing dP?