Gas network calculation explained with the formulas of design practice and worked examples: the same technical foundations as the Gasnetics engine, in guide form.
The full path: from customer demands to diameter selection, with the flow law, the checks and a worked numerical example.
Why gas calculations work in squared pressure, what drives the loss, and a step-by-step calculated example.
The Italian classification by maximum operating pressure, with velocity limits and the minimum pressures to guarantee.
The historic correlation of Italian and Spanish practice, its Q/D ≤ 150 domain and the measured comparison with the general flow equation.
A gas lighter than air gains gauge pressure on the way up: how big the effect is, when it matters and how it is calculated.
Density above air, altitude correction with the opposite sign, steeper drops: calculating an LPG network versus natural gas.
What changes in the hydraulic calculation when the mixture is no longer just methane: molar composition, blend viscosity, per-source properties.
Why velocity limits exist, the Italian practice ladder by pressure band, and the difference between standard flow and real velocity.