Engineering Guides
In-depth articles
Cooling Tower Water Use: Cycles of Concentration Explained
How much water a cooling tower actually consumes, why higher cycles of concentration save huge amounts, and the treatment limits you cannot ignore.
Boiler Feed Pump Sizing: A Practical Guide
How to size a boiler feed pump for real installations — flow, TDH, NPSH, and common mistakes.
Darcy vs Hazen-Williams: A Practical Guide to Pipe Friction Loss
Why the Darcy–Weisbach equation should be your default, when Hazen–Williams still earns its keep, and how to add fittings without over-estimating losses.
Steam Flow in Pipes: Velocity, Pressure Drop and Line Sizing
How to size steam mains — the velocity limits engineers actually use, why hot steam pipes drop pressure faster than you think, and the sanity checks every design should pass.
NPSH Explained: The One Number That Kills More Pumps Than Anything Else
What NPSH is, how to calculate NPSHa, why hot water is so dangerous, and how much safety margin is enough.
Pump Sizing 101: A Practical Engineer's Guide
How to size a centrifugal pump the right way — flow, TDH, NPSH, efficiency and the mistakes that burn out impellers.