Summary: Strength Calculation for Pressure Equipment under TR CU 032/2013
- Mandatory Safety Verification: The Strength Calculation (Russian: Raschet na prochnost) is a legally required component of the technical documentation for pressure equipment under TR CU 032/2013.
- Analytical Proof of Structural Integrity: Using specialized engineering software, minimum wall thicknesses, allowable stresses, load-bearing capacity, and buckling stability of vessels, boilers, pipelines, and pressure-retaining components are verified under operating and test conditions.
- Binding Calculation Standards: Design verification is governed by Eurasian standards such as GOST 34233 (Parts 1–12), GOST R 52857.4-2007, as well as PNAE G-7-002-86 and NP-068-05 for nuclear power installations.
- Compulsory Annex to the Pressure Vessel Passport: The Strength Calculation constitutes an indispensable annex to the Pressure Vessel Passport and is a prerequisite for EAC Certification and EAC Declaration.
- Sanctions-Compliant Engineering Services: Schmidt & Schmidt compiles standard-compliant Strength Calculations based on your design drawings and 3D CAD models through our European and Kazakh specialist engineers.
What Is a Strength Calculation and Why Is It Required?
The Strength Calculation for pressure equipment is a mandatory technical verification required for conformity assessment under Technical Regulation TR CU 032/2013 "On Safety of Pressure Equipment" in the Eurasian Economic Union (EAEU).
It serves to objectively evaluate resistance to rupture, deformation limits, and structural stability of the equipment under allowable mechanical and thermal stresses. The calculation is performed using validated engineering software that assesses the load-bearing capacity of pressure vessels, boilers, pipelines, and their individual components both under normal operating conditions and under the elevated loads of hydrostatic pressure testing.
When calculating individual pressure-bearing elements, the required minimum wall thicknesses and maximum allowable working pressure (MAWP) are determined. Input parameters include geometry, material properties, weld joint efficiencies, nozzle configurations, and external loads. All results are documented in a comprehensive calculation report detailing every intermediate step and safety factor.
Normative Basis, Scope of Application, and Report Structure
Legal and Normative Foundations
- GOST 34233 (Parts 1–12): Vessels and Apparatuses. Norms and Methods of Strength Calculation (primary current Eurasian standard);
- GOST R 52857.4-2007: Vessels and Apparatuses. Calculation of Strength and Tightness of Flanged Joints;
- PNAE G-7-002-86: Strength Calculation Standards for Equipment and Pipelines of Nuclear Power Plants;
- NP-068-05 – Pipeline Fittings for Nuclear Power Plants. General Technical Requirements.
Typical Scope of Application
- Stationary pressure vessels and process apparatuses;
- Steam and hot-water boilers;
- Industrial pipelines, valves, safety devices, and pressure-retaining accessories;
- Installations in the oil, gas, chemical, and power generation industries;
- Components for nuclear power facilities.
Mandatory Content of a Strength Calculation
- Complete input data (geometry, wall thicknesses, material grades, corrosion allowances, weld joint efficiencies);
- Schematic layout / design sketch of the pressure equipment with numbered calculated components;
- Operating and test conditions (design pressure, test pressure, design temperature, load cycle counts);
- Applied calculation formulas, normative references, and intermediate results;
- Final calculation results verifying allowable stresses and safety margins.
Documents Required to Place an Order
- General arrangement drawing (sketch or CAD/3D model) of the pressure equipment with dimensions;
- Material specifications for all individual parts stating applicable material standards;
- Functional description and details of external mechanical loads;
- Load data (design pressure, design temperature, planned service life, piping connection loads, seismic spectra where applicable);
- Indication of the applicable technical regulation (e.g., TR CU 032/2013).
Turnaround Time, Costs, and Delivery of Documents
The processing time and cost of a Strength Calculation depend on the geometry of the equipment, the number of assemblies and load cases to be evaluated, and the completeness of the source documentation. Compilation typically takes between a few business days and several weeks.
Project execution and billing are carried out with full sanctions compliance in Euros via our headquarters in Passau, working alongside our engineering teams in Kazakhstan (Sanctions Compliance). Upon completion of the calculation, you promptly receive a digital copy by email, and the bound original is delivered to you via courier within a few days.
