Solve pressure, wall, or SDR with explicit assumptions.
Thin-wall hoop relation used in thermoplastic pressure education. Confirm allowable design stress S from the governing standard and ALFA product data for your compound/SDR.
Where OD, t in consistent length units; P and S in MPa in this tool (1 MPa = 10 bar).
What it calculates: Barlow / SDR calculator results for preliminary design discussion. Outputs are educational aids — validate against project codes and manufacturer data before construction.
Relates pressure, diameter and wall via Barlow-type hoop stress / SDR relationships used in pressure-pipe education.
Outside diameter, wall/SDR, design stress or pressure — label which variable you solve for.
Educational only. Design must follow the governing product standard and project specification — not this calculator alone.
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