Process engineering references
Lookup tables we use on our own projects, published in full so the numbers are readable without a download or a login.
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- Pipe schedule chart — outside diameter, wall and bore for NPS Schedule 10, 40 and 80, alongside the sanitary tube dimensions that use a completely different sizing system.
- Saturated steam table — saturation temperature by gauge pressure, computed from IAPWS-IF97, with the 121°C SIP condition located at 15.1 psig.
- Pipe weight calculator — weight per foot by schedule in carbon steel and stainless, plus sanitary tube, with the mean-diameter formula the numbers come from.
- Valve Cv calculator — required Cv by flow and pressure drop, the Kv conversion, and why an oversized control valve destabilises a loop.
- NPSH calculator — vapour pressure and available suction head by temperature, and why a hot WFI loop cavitates when a cold flush does not.
- SCFM to ACFM calculator — conversion factors by line pressure, and the rotameter error that under-purges an orbital weld.
- Bolt torque calculator — torque by bolt size and nut factor, showing the 40 percent spread between dry and lubricated threads.
- LMTD calculator — log mean temperature difference for real duties, typical overall coefficients, and why fouling sets the margin.
- Orifice plate sizing — beta ratio against permanent pressure loss, and why a plate has no place on a product line.
The calculators are in the same family: dead-leg L/D, CIP flow and velocity, cleanroom air changes, tank volume, pipe and tube volume and the USP water specification lookup.
Process engineering calculators
- Dead-leg L/D calculator — ASME BPE limit of 2, and the legacy six-diameter figure still widely quoted.
- CIP flow and velocity calculator — diameter, velocity and flow, and why the largest line governs the pump.
- USP 645 conductivity lookup — the temperature-dependent Stage 1 limit plus the full WFI and Purified Water spec set.
Building or remediating a process system?
These tools are free and self-serve. If you have an actual project — a water system, a cleanroom, sanitary piping, a skid — tell us the scope and constraints and we will come back with a real answer.