Preliminary sizing for engineering evaluation only. Not for construction. All results must be independently verified by a qualified engineer against the applicable code edition.

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Vessel Sizer

First-principles recirculator vessel sizing, level/volume/charge analysis, ASME UG-125 + ANSI/ASHRAE-15 relief sizing with inlet-loss compliance, and IIAR-2 line sizing for industrial refrigeration vessels.

Conditions

8 inputs
°F

Must resolve on the fluid's saturation table (~-50 to +110°F depending on fluid; R-744 stops at 80°F).

°F

Used to derive MAWP unless an override is set below.

tons
: 1

Typical design range ~2.5–4:1. Default 3.

psid

Feeds the dataset-independent pump-duty estimate below. Blank = engine default.

Sizing mode & vessel

7 inputs
Vessel sizing mode

Only affects the vertical-orientation Souders-Brown cross-check.

in
°F
psig

Optional. Leave blank to derive MAWP from SCT.

Fraction of shell ID from the bottom. Default 0.25.

Enter the refrigeration duty and select Calculate to size a recirculator vessel — geometry, MAWP, weights, circulation GPM, pump duty, and the governing safety-factor checks.

Methodology references

  • ASME BPVC Section VIII, Division 1 — UG-27 (cylindrical shell, internal pressure) and UG-32 (2:1 ellipsoidal head, internal pressure), used inside recirculator vessel sizing
  • ASME BPVC Section VIII, Division 1 — UG-125(c)(2) (relief-valve orifice area, vapor flow) and API 526 standard orifice sizes
  • Souders-Brown vapor-disengagement velocity, plus an ensemble of empirical vapor-separation correlations, for vapor space / separation-velocity sizing
  • ANSI/ASHRAE-15 — refrigerant relief factor and required relief capacity
  • IIAR-2 — §11 (liquid level, hold-time), §11.2.2 (pump suction line velocity), §11.4 (wet-return line sizing), §15.5 (relief accumulation convention)
  • Internal relief-sizing inlet-line pressure-drop methodology (Colebrook fully-rough friction factor, entrance loss, 3-way changeover loss) with a flat 10%-of-set-pressure compliance screen — a documented conservative proxy for the real per-valve blowdown criterion, not itself a numbered code rule