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As a US-based engineering firm serving clients from Houston to London, and from Dubai to Abu Dhabi, we at Fluxiss believe that expert pressure vessel design and calculation isn’t just a service—it’s the cornerstone of your operational integrity. We want to walk you through exactly what that means.
In pressure vessel design, the sheer authority of the ASME BPVC (Boiler and Pressure Vessel Code) was clear. This is the vessel code design Bible, particularly ASME Section VIII, which covers unfired pressure vessels. It’s the minimum requirement for safety, period.
The core of this service is pure mathematics, or design by rule. We are talking about using rigid ASME rules to perform the initial code calculation. This step determines your minimum required wall thickness calculation (using formulas like UG-27 for internal pressure) and the crucial Maximum Allowable Working Pressure (MAWP).
We select the material allowable stresses from ASME Section II, Part D, ensuring the design adheres to strict stress limits. Every weld design code and connection must be meticulously cross-verified in a final code check to guarantee full ASME compliance. When we issue the Code Verification report, we’re confirming your vessel’s integrity against one of the world’s most trusted vessel standards.
Sometimes, the conservative formulas of ASME Div. 1 just aren’t enough. What if your vessel has a complex geometry—say, a strange nozzle connection or a heavy support saddle? That’s where the power of Finite Element Analysis (FEA) comes in.
We’ve seen projects saved by a good FEA analysis. It’s all about creating a precise finite element model and running a detailed stress simulation. We use this technique for:
The output is a brilliant stress contour map that tells the whole story, letting us prove compliance under ASME Section VIII, Division 2 (Design by Analysis), where the margins are tighter, but the analysis is more thorough. This rigorous FEA validation ensures your vessel can handle the real-world load simulation.
No vessel exists in a vacuum. It must stand up to everything the environment throws at it. For our clients in seismic zones like California or high-wind areas like the North Sea, performing detailed Seismic and Wind Load Analysis is non-negotiable.
We follow standards like ASCE 7 (in the US) or the relevant Eurocodes (for the UK and Europe). We calculate the wind load and seismic forces applied to the vessel. For tall, slender vessels, we perform modal analysis to find the vessel’s natural frequency, which is crucial for determining the structural response to dynamic forces (dynamic loading).
We check various load combinations to ensure the support structure (skirt, anchors, and lugs) provides sufficient seismic safety and prevents overturning—a critical check for any vertical vessel. This complete load evaluation ensures the vessel is stable under both pressure and lateral forces.
From ASME Section VIII code assessment in the USA to PD 5500 compliance in the UK, we are confident that our process gives you the most reliable path forward. You get precise design and calculation that saves you time, material, and worry.
Ready to see how our engineering excellence can secure your project?
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Division 1 of the ASME is Design by Rule, with conservative formulas and a greater safety factor with simpler designs. Division 2 is 'Design by Analysis', which needs more advanced FEA modeling and analysis, but can offer reduced safety factors, which tend to produce thinner shells and saving of material costs.
FEA would be employed to correctly map the complex stress contour distributions, which are then directly compared to the material allowable limits specified by the ASME code (in Division 2, Part 5). This procedure validates that there is no occurrence of excessive primary and secondary stresses beyond the code-stipulated stress limits.
The most significant values that are involved in the original code calculation are the design pressure and the design temperature. These are the highest possible expected operational conditions that directly determine the calculation of the necessary wall thickness and the highest possible pressure rating of the vessel, which ensures a safe operation until the end of its lifetime.
Yes, we are experts in seismic and wind load assessment of projects worldwide, making use of such evaluation standards as ASCE 7 in the US or Eurocode EN 1991 in Europe and UK. We conduct important dynamic loading tests such as modal analysis and seismic check to provide you with wind stability of your vessel anywhere in the world.
We’re proudly serving clients across the USA, UK, UAE, and Europe. From corporate giants to research labs and the shipping industry,