Is the Flow Rate Across a Split Gas System Additive?

[Weld Engineer]

If I have a 1/2" source hose with 60PSI and a Flow sensor then split to four 3/8" hoses with a flow rate limited to 30SCFH. Should I expect to have a 120SCFH flow rate across my flow sensor? The gas will be 90% Argon/10%CO2, but we could assume an Ideal Gas for this... Right? I understand Metallurgy, but don't remember my gas laws very well.

 

[JBA]

In general, the sum of the flows in the the four outlet hoses will be the flow value shown at the source regardless of whether this flow is equally distributed across those four outlet hoses or not.