FEA for Pressure Vessels

Roben, Mfg., Inc. specializes in the custom engineering and fabrication of finite element analysis (fea) for chemical, fine chemical, petrochemical, pharmaceutical, food and beverage, defense, and power-generation industries. Every project is designed to ASME Section VIII Division 1 (with optional Division 2), is National Board registered, complies with the European Pressure Equipment Directive (PED 2014/68/EU) for CE marking, and is registered under the Canadian Registration Number (CRN) system for all Canadian provinces.

What Finite Element Analysis (FEA) Are

Finite Element Analysis (FEA) is a computational stress analysis method that divides a structure into small elements and solves for stress, strain, and deflection under applied loads. FEA is used in pressure vessel engineering wherever the geometry exceeds standard code rules, where externally applied loads are significant, or where fatigue, seismic, or thermal-cycling response must be quantified.

Why Finite Element Analysis (FEA) Matter

ASME VIII Div. 1 covers most standard pressure vessel geometries with closed-form rules, but column supports, nozzle reinforcement at large openings, lifting and transportation loads, dynamic seismic and wind loads, and any Div. 2 design require explicit stress analysis. FEA quantifies these stresses against allowable limits.

Finite Element Analysis (FEA) — Specifications and Capabilities

FEA software: ANSYS Mechanical, Solidworks Simulation, Abaqus

Element types: Solid, shell, beam, contact, gasket

Analysis types: Linear static, modal (natural frequencies), seismic spectrum, transient dynamic, thermal-stress, fatigue (Smith / Soderberg / Goodman)

Code reference: ASME VIII Div. 2 Part 5, ASME Section III, NB-3200

Output: Stress maps, deflection plots, modal shapes, fatigue life

Certifications and Codes

ASME Section VIII Division 1 — U-stamp

ASME Section VIII Division 2 — available on request

National Board registration — R-stamp

PED 2014/68/EU — CE marking with Notified Body coordination

CRN — registered for all Canadian provinces

NACE MR0175 / ISO 15156 — sour-service compliance

AWS D1.1 / ASME Section IX — qualified welding procedures and welders

Frequently Asked Questions About Finite Element Analysis (FEA)

When is FEA required for a column or pressure vessel?

FEA is required when geometry exceeds code rules (large openings, complex junctions), when external loads are large (piping reactions, equipment loads, lifting), when dynamic response matters (seismic, wind vortex shedding), or when an ASME VIII Div. 2 design path is selected.

What software does Roben Mfg. use for FEA?

ANSYS Mechanical for the most demanding analyses, Solidworks Simulation for routine pressure-stress and support analyses, and Abaqus for advanced nonlinear or dynamic problems.

Does FEA replace code calculations?

No — FEA supplements code calculations. The vessel is first checked against ASME VIII rules; FEA is added where rules don't apply or for design-by-analysis verification under Div. 2 Part 5.

Can Roben Mfg. perform fatigue analysis on columns?

Yes. We run code-compliant fatigue analyses per ASME VIII Div. 2 Part 5.5 or NB-3200, using S-N curves matched to the material and weld category, with appropriate stress concentration factors.

What is the deliverable from an FEA?

A signed analysis report including geometry, loads, boundary conditions, mesh quality, results, and code comparison. The report is included in the design submittal package for Authorized Inspector or Notified Body review.

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Contact Roben Mfg., Inc. to discuss your project specifications, timeline, and material requirements.

📞 (732) 364-6000 ✉ sales@robenmfg.com 📍 760 Vassar Ave, Lakewood, NJ 08701

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Finite Element Analysis (FEA) for Columns and Pressure Vessels