Engineering Support for Pressure Vessel Manufacturers
Pressure vessel design carries a different risk profile than most fabricated equipment. Undersizing or a missed code check is not a fit-up problem, it is a safety and certification failure. We support pressure vessel fabricators and OEMs with mechanical design calculations, FEA & stress analysis, GA drawings & BOM, fabrication shop drawings, and 3D modelling, for vessels destined for the US, Canadian, European, and Australian markets.
Codes & Regional Compliance
- United States / global baseline: ASME Section VIII Division 1 for standard-pressure vessels; Division 2 where higher allowable stress and more rigorous analysis justify thinner walls or higher design pressure.
- Canada: CRN (Canadian Registration Number) registration support, with design calculations and documentation packages structured to meet ABSA (Alberta), TSSA (Ontario), and equivalent provincial regulator submission requirements.
- Europe: PED (Pressure Equipment Directive) categorization and the applicable conformity assessment module, with documentation structured to support CE marking.
- Australia: AS 1210 / AS 4343 design and documentation requirements, including the registration documentation expected by state-based regulators.
- Material & MDMT: material code compliance (SA-516, SA-240, etc.) and impact testing requirements tied to minimum design metal temperature, checked against whichever regional code applies to the destination market.
Design Checks Unique to Pressure Vessels
- Wall thickness vs MAWP, and flagging when a code-compliant thickness creates a fabrication problem (forming limits, weld prep mismatch) before it reaches the shop.
- Nozzle reinforcement and loading: area replacement calculations plus practical nozzle orientation/clearance checks that prevent fit-up rework.
- External pressure / buckling checks for vacuum or jacketed vessels.
- MDMT and impact testing requirements: a common source of late-stage surprises if not caught at design stage, and one that varies by destination market.
- Weld joint efficiency selection and its knock-on effect on plate thickness and cost.
Typical Deliverable Set
- GA drawing with full nozzle schedule and BOM
- Design calculation package (thickness, MAWP, MDMT, nozzle reinforcement) to the applicable regional code.
- Fabrication drawings with weld map and weld joint details
- 3D model where layout/interference checking adds value (dense nozzle arrangements, jacketed or internals-heavy vessels)
- Registration-ready documentation package where CRN, PED, or AS registration is required
Common Mistakes / Revision Triggers
- Nozzle clashes discovered only at fit-up
- MDMT requirements missed until a late client review, or assumed from the wrong regional code
- BOM quantities not matching the GA after a revision
Common questions
Frequently asked questions
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