To use an effectively, you must provide accurate inputs for:
Unlike simple air or water calculators, SF₆ tools must handle and non-ideal gas effects at moderate pressures.
100 meters of stainless steel pipe, 50 mm inner diameter, flowing 20 m³/h of water at 25°C. Fittings: 5 x 90° elbows, 1 x swing check valve, 2 x gate valves.
A deep calculator gives more than just ΔP:
Open the in your mobile browser. Input the flow (30 gpm), pipe length (400 ft), and six elbows. Fifteen seconds later, you see: Pressure drop: 12 psi . You check the pump curve: it supplies 50 psi. You say, "Yes, 2-inch is fine."
Some calculators now include a cost-optimizer: It balances pumping cost vs. pipe purchase cost to recommend the cheapest ID.