Product classification and safe filling velocity limits for tank loading (OISD-RP-110, October 2018 Revised Edition)
◉ OISD-RP-110 §4.5, §7.0 STYLE CHECK · NOT A REGULATORY SUBMISSION TOOL
⚠ Indicative tool only. Formulas and criteria checked directly against the standard's page images. The reference flow-rate table in §4.5.1 has an internal inconsistency worth knowing about: five of its six rows sit consistently ~3–8% below a plain velocity×area calculation (plausibly reflecting internal vs. nominal pipe diameter), but the 80mm row breaks that pattern in the opposite direction. Rather than silently include a value that may be a source-table irregularity, this tool computes the primary flow rate from basic geometry (independently verifiable) and shows the standard's own table alongside it for cross-reference, flagged as-is. Earth resistance values are NOT covered here — the standard itself defers those to OISD-STD-137, which isn't available to build from (same gap as the Lightning Protection calculator).
Identification
Research entries stay private to you for practice/testing. Switch to Official once this is a real design your company should see.
Product Classification (§7.0)
Result
Classification—
Tank Filling Velocity Limits (§4.5.1)
Result
Initial fill velocity limit1 m/s (3 ft/s)
Required submergence before rate increase—
Flow rate at 1 m/s (from pipe geometry)—
Standard's own reference table value (cross-check)—
Post-submergence maximum velocity—
Liquid Conductivity Check (§2.5)
Result Not evaluated
Recommended minimum for adequate charge dissipation50 picomho/m
Absolute floor (below which bonding/earthing may not help)10 picomho/m