Zone 0/1/2 extent-of-classification around any heavier-than-air gas/vapor point source — pumps, valves, flanges, compressors (API RP 505, §9.2.1)
◉ API RP 505 §9.2.1 STYLE CHECK · NOT A REGULATORY SUBMISSION TOOL
⚠ Indicative tool only, distinct from and larger-scale than the tank/loading/vent tools already built. This section's distances are explicitly for "typical refinery installations" — a general point-source pattern (transfer pumps, valve packing, flange connections) rather than a tank-specific figure, and the base distances (7.5–15m) are noticeably larger than the tank-specific figures elsewhere in this standard. Verified directly against Figures 20–22 of this edition. Distances must be used with judgment; greater or lesser distances may be justified by the standard's own text.
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