Piping Engineering Guides

Worked calculations and selection guidance — sizing, wall thickness, test pressure, bolt torque and material choice, each with the formula and a full example.

Pipe Sizing by Flow Rate and VelocityVelocity limits · gpm capacity Pipe Wall Thickness CalculationBarlow · B31.3 · worked example Hydrostatic Test PressureShell test · B31.3 · by class Pressure-Temperature DeratingReading P-T tables · interpolation Flange Bolt TorqueT = K·F·d · all B16.5 bolt sizes Choosing a Flange Face TypeRF · FF · RTJ selection Pipe Material SelectionA53 · A106 · A312 · A335 What a Pipe Schedule Actually IsWall series · fixed OD NPS vs DN ExplainedDesignators · not measurements Pipe End ConnectionsBevel · plain · threaded

These guides explain method, not code compliance. Every calculation here is a worked illustration. Confirm the governing equations, allowable stresses and acceptance criteria against a current copy of the applicable ASME, ASTM or API document before using them in design.