Compute velocity, Re, friction factor, head loss, and Δp with presets for chilled/hot water (45°, 140°, 180°F), EG/PG glycol blends (20–50%), and refrigerants (R-22, R-410A, R-134a).

🎯 Purpose

The pipe calculator estimates pressure loss and head loss in hydronic and refrigerant piping systems. It supports water, glycol solutions, and refrigerants for hot/chilled water loops, radiant systems, and process lines.

📥 Inputs

• Flow rate (GPM)
• Pipe size (in) — inside diameter
• Pipe length (ft)
• Pipe material
• Fluid selection (chilled water, hot water, glycol blend, refrigerant)
• Specific gravity (auto-filled by fluid selection)

📤 Outputs

• Velocity (ft/s)
• Reynolds number (Re) & flow regime
• Friction factor (f) — Churchill (default) or ML
• Head loss (ft)
• Pressure drop (psi)

📐 Methods & Equations