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Pressure Vessels

Pressure Vessels

Pressure vessels are closed tanks whose pressure inside is higher than the ambient pressure. Here, computational proof is often provided following the AD datasheets. Often, simple analytical methods or simplified FEM calculations are suffcient for such analyses.

Tank

An enclosed component designed and constructed to contain fluids under pressure, including directly attached parts up to the device for connection to other equipment. A tank may have several pressure chambers.

Pipeline

Line components intended for the passage of fluids, which are connected together for installation in a pressure system. Pipelines include in particular pipes or pipe systems, pipe fittings, equipment, expansion pieces, hoses or other pressure-retaining parts, if any. Heat exchangers made of tubes for cooling or heating air are treated in the same way as piping.

Equipment with safety function

Devices intended to protect the pressure equipment when the permissible limits are exceeded. These devices include:

Equipment for direct pressure limitation such as safety valves, bursting disc safety devices, buckling rods, controlled safety devices (CSPRS)
Limiting devices that either trigger corrective devices or cause shutdown or shutdown and lockout, such as pressure, temperature or fluid level switches and measurement and control protection devices (SRMCR)

Pressure-retaining equipment parts

Devices with an operating function which have a pressurised housing.

Assemblies

Several pieces of pressure equipment which are connected by a manufacturer to form a coherent functional unit.

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Pressure Vessel Calculation at Merkle & Partner

Merkle & Partner focuses on the calculation of more complex tanks that can no longer be calculated with the simplified approaches. The analysis is based on finite element models of any geometry. Proof can also be provided with non-linear behavior, plasticity of the material, in-homogeneous temperature, etc.

An evaluation of the resulting deformations and stresses can be performed according to all common norms and standards (AD2000, ASME, KTA, EuroCode etc.).

Thermal shock due to extremely cold or hot mediums (liquid gas, coolant etc.)
Earthquake or explosion pressure wave
Dynamic flange load from pressure surges
time-varying (transient) pressure/temperature load which influences the operational strength of the component

An evaluation of the resulting deformations and stresses can be performed according to all common norms and standards (AD2000, ASME Sec. III + VIII, KTA, DIN EN 13445 etc.).

Calculation using the finite element method (FEM) helps our customers to save time and costs and can already provide indications of possible weak points and optimisation potential during development.