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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Selected plate 0.750″
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Result
Selected plate
0.750″
Shell MAWP
267psi
Empty weight
12,359lb
Capacity
4,600gal
Shell required (internal)0.7113
Head required0.6014
Governinginternal pressure
Plate buyone 120×480″ sheet × 0.750″
Cut planshell blank 120″ long × 299.24″ girth · drop ~4,609 lb
Drives the plateshell
ASME compliance
Long. seam · Cat. ASpot UW-11(b), Type 1 (E = 0.85)
Circ. seam · Cat. BSpot UW-11(a)(5)(b), Type 2 (E = 0.80)
MDMT / impactexempt · UG-20(f)
PWHTnot required
Plate conditionas-rolled
External pressure is provisional. Radiography level does not change the selected plate size here. Verify vacuum design against the UG-28 charts.
MDMT. Impact testing not required - exempt per UG-20(f) at MDMT -20F (P-No. 1, tg 0.75" <= 1", MDMT >= -20F, hydrotested).
Dual rating possible: -55°F / -20°F @ 87.5 / 250 psi
Shell plate — to plate supplier
SA-516-70. Shell 96" OD × 120" T-T. Plate thickness 0.750" (min. 0.7113").
Heads — to head former
2 × 2:1 ellipsoidal head, 96" OD. Plate thickness 0.750" (min. 0.61"). Seamless. Hot formed.
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Methodology references

  • ASME BPVC Section VIII, Division 1 — UG-27 (cylindrical shell, internal pressure)
  • UG-32 (formed heads, internal pressure, ID basis) and Appendix 1-4 (formed heads, OD basis)
  • UG-28 (external pressure) — this tool uses a provisional Windenburg-Trilling elastic model, not the full Figure G / Factor B chart method
  • UW-12(d) (head joint efficiency) and UW-11 (radiography joint-type designation)
  • UCS-56, UCS-66, UCS-66.1 (MDMT / impact-test exemption curves) and UG-20(f) (blanket MDMT exemption)
  • UCS-57 / UHA-33 (mandatory full radiography by thickness) and UCS-68 (PWHT credit)
  • ASME Section II-D (material allowable-stress tables)
  • ASME B36.10M (NPS/schedule-wall tables) and ASME B16.9 (seamless formed caps) — pipe construction only