Pressure & Thickness Trainer

Pressure & Thickness Trainer is a training and study aid for learning pressure and thickness arithmetic and showing the work clearly.

Answer mode puts the inputs at the top and the result in large type. Full-access show-the-work mode lists each input and unit, writes the formula, substitutes your values and shows the result step by step.

Pressure-vessel practice covers cylindrical and spherical shells, hemispherical, 2:1 ellipsoidal and torispherical heads, and conical sections. Piping practice covers straight pipe under internal pressure. Tank practice covers shell-course thickness and fill-height arithmetic by the one-foot method. A current-versus-proposed exercise compares calculated requirements with the thickness you enter.

FREE ACCESS
Five calculator runs per day in answer mode.

FULL ACCESS
One optional US $0.99 purchase unlocks unlimited calculations, show-the-work mode, saving worked examples, sharing, JSON export, the user-entered material library and study mode. No subscription or automatic renewal. The store checkout shows the applicable price before purchase. Existing purchases of the same full-access product remain restorable through the purchasing Google Play account.

Enter allowable stress values from your own applicable reference; the app does not supply allowable stress tables. Core calculations and saved examples work offline in US customary or SI units. Google Play purchase, restore and localized-price checks require connectivity. No Appalachian Integrity account or sign-in is required. App screens are available in English, Spanish, Portuguese, French, German, Hindi and Tamil; module names, study problems and some reference text are in English.

This is a training and study aid, not an engineering tool. Independently verify every formula, input and result. It does not inspect equipment, interpret a code, authorize a rerating or make fitness-for-service decisions. Obtain qualified professional or PE review when required. Appalachian Integrity LLC is not affiliated with or endorsed by a standards organization.