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Piping Engineering Guides
Long-form method guides written by the same licensed engineer who maintains the calculators — the reasoning and code history behind a topic, not a rephrased standard. Where a guide quotes a number, the number traces to a cited paragraph or a fixture-verified calculation.
GuideASME B31J Stress Intensification & Flexibility Factors vs B31.3 Appendix DASME B31.3-2020 deleted Appendix D and mandates B31J for SIFs and flexibility factors. What changed, why, the practical impact, and how to handle legacy work.
GuideHydrostatic vs Pneumatic Leak Testing — ASME B31.3 and B31.1When ASME B31.3 permits a pneumatic leak test instead of hydrostatic, the 1.5·P·ST/S formula, the ST/S ≤ 6.5 cap, and a worked example. Free calculator.
GuideASME BPE Hygienic Piping Design — Dead Legs, Drainability and CIP VelocityASME BPE hygienic piping design: the L/d ≤ 2 dead-leg rule, GSD slope designations for drainability, and 5 ft/s CIP velocity — with a free calculator for each.
Shorter reading
- The FAQ index — every question answered across the site, linked to its source page.
- Worked examples — the full step-by-step arithmetic behind every calculator.
- All calculators — method, limitations, worked example, then the live tool.