Pipeline Integrity Calculators

Corroded Pipe — Remaining Strength

ASME B31G-2012 · Original B31G and Modified B31G (0.85dL / RSTRENG simplified). Estimate the failure pressure and safe operating pressure of a pipe with metal-loss corrosion.

Remaining Strength Calculator

Single largest metal-loss defect (max depth × axial length). For a river-bottom profile of multiple pits, a full RSTRENG effective-area analysis is needed — see the note below.

Outside diameter D (in)

Wall thickness t (in)

Pipe grade (SMYS)

Max corrosion depth d (in)

Axial length of corrosion L (in)

MAOP / operating pressure (psig) — optional

Safety factor (for safe pressure)

Estimated failure (burst) pressure — Modified B31G

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psig · the method operators use most

Original B31G P_f

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psig (more conservative)

Safe pressure (Mod ÷ SF)

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psig

Intact burst (no defect)

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psig at flow stress

Remaining strength

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% of intact

Screening estimate — not a fitness-for-service determination. Results are Level-1 hand-calc estimates per ASME B31G-2012. They assume a single blunt metal-loss defect, no cracking, no dents/gouges, and pressure loading only. A real disposition (repair, pressure reduction, reassessment interval) must come from a qualified pipeline integrity engineer, using a full RSTRENG effective-area analysis of the measured defect profile where warranted. Verify all inputs against your ILI/field data.

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