Based on ASME B31.3 (Process Piping) — pressure wall thickness and allowable pressure.
Open calculatorStraight pipe under internal pressure (Eq. 3a / 3b), with allowable stress and material data.
Open calculatorRequired hydrostatic / pneumatic test pressure (ASME B31.3 para. 345).
Open calculatorMaximum pipe support span from allowable bending stress and deflection.
Open calculatorFree thermal growth, fully-restrained stress and anchor force for piping.
Open calculatorThis web application implements the straight-pipe pressure design equations from ASME B31.3 for quick engineering estimates. It includes a reference set of common materials, allowable stresses, quality factors, and the Y coefficient.
This tool is for estimation and self-study purposes only, for use by qualified piping engineers. It is not a substitute for the ASME B31.3 code. Always verify results against the current code edition and exercise professional judgment. ASME is the owner of the standard; this tool is not affiliated with or endorsed by ASME.