GOST 34233.11-2017 PDF

Full title and description

GOST 34233.11-2017 — "Vessels and apparatus. Norms and methods of strength calculation. Method of strength calculation of shells and bottoms according to weld misalignment, angular misalignment and shell nonroundness" (Russian: ГОСТ 34233.11-2017). The standard defines rules and calculation methods for strength assessment of cylindrical shells, convex bottoms and covers of pressure vessels and apparatus taking into account deviations from ideal geometry such as weld edge misalignment, angularity and both local and general non‑roundness.

Abstract

This standard establishes a calculation method to assess the allowable strength of shells and bottoms of vessels and apparatus operating under static and low‑cycle loading from internal or external pressure, explicitly accounting for geometric deviations (weld misalignment, angularity and non‑roundness). It is intended to support decisions on continued operation, technical diagnostics and industrial safety expert review when geometric nonconformities are found.

General information

• Status: Active / In force (interstate standard adopted as a national standard of the Russian Federation and in use in EASC member states).
• Publication date: Approved 14 December 2017; introduced into effect 1 August 2018.
• Publisher: Interstate standard (EASC) / implemented nationally by Rosstandart (Federal Agency on Technical Regulating and Metrology).
• ICS / categories: 71.120 (Chemical technology — equipment for the chemical industry) and 75.200 (Petroleum and related technologies).
• Edition / version: GOST 34233.11-2017 (original issue 2017, in force from 2018).
• Number of pages: 18 pages (electronic PDF).

Scope

The standard applies to shells, convex bottoms and covers of pressure vessels and apparatus subject to static and low‑cycle loads from internal or external pressure. It provides a calculation method to evaluate strength when deviations in manufactured geometry (edge misalignment of welded joints, angularity, overall and local non‑roundness) exceed or differ from nominal tolerances contained in technical requirements or manufacturing specifications. The method is intended both for design verification and for assessment during in‑service inspections, diagnostics and industrial safety expertise.

Key topics and requirements

• Definitions and notation for geometric deviations: weld edge misalignment, angularity, local and general non‑roundness.
• Mathematical and engineering method for calculating stresses and allowable loads in shells and convex bottoms accounting for the listed deviations.
• Conditions of applicability: static and low‑cycle loading, internal and external pressure regimes.
• Guidance for use in technical diagnostics and industrial safety expert evaluations to decide on continued operation or necessary remediation.
• References to related parts of the GOST 34233 series and to normative documents governing wall thickness, permissible pressures and fabrication/inspection quality (e.g., ГОСТ 34233.2, ГОСТ 34233.6 and ГОСТ 34347).

Typical use and users

Engineers and designers of pressure vessels, mechanical and structural engineers, fabricators and welders, non‑destructive testing and inspection specialists, industrial safety experts and regulatory authorities use this standard to: verify strength when geometric deviations are present, determine if repairs or restrictions are required, and support safety assessments and certification/technical diagnostics of in‑service equipment.

Related standards

Commonly referenced documents and related standards include other parts of the GOST 34233 series (design and strength calculation norms), ГОСТ 34347 (technical requirements for welded steel vessels and apparatus), the earlier national standard ГОСТ R 52857.11-2007 which this document supersedes, and international equivalents such as ISO 16528‑1/‑2 (similar subject matter). Amendments/corrections have been issued (notably a 2023 correction/amendment).

Keywords

pressure vessel, shell, bottom, strength calculation, weld misalignment, edge misalignment, angularity, non‑roundness, ГОСТ 34233.11-2017, vessels and apparatus, technical diagnostics, industrial safety.

FAQ

Q: What is this standard?

A: GOST 34233.11-2017 is an interstate (GOST/EASC) standard that specifies a method for strength calculation of shells and convex bottoms of pressure vessels and apparatus accounting for geometric deviations such as weld edge misalignment, angularity and non‑roundness; it is used for design verification and in‑service assessments.

Q: What does it cover?

A: It covers calculation procedures, applicability conditions (static and low‑cycle pressure loading), treatment of geometric deviations and guidance for applying results in technical diagnostics and industrial safety evaluations.

Q: Who typically uses it?

A: Pressure vessel designers, mechanical/structural engineers, fabricators, inspectors (NDT), maintenance engineers, and industrial safety experts and regulators involved in assessment and certification of vessels and apparatus.

Q: Is it current or superseded?

A: As of its adoption it replaced the earlier national document ГОСТ R 52857.11-2007; the 2017 GOST 34233.11 is in force (effective 1 August 2018) and has received subsequent corrections/amendments (noted in 2023). Users should check the latest national registries or the issuing body for any newer amendments.

Q: Is it part of a series?

A: Yes — it is one part of the GOST 34233 series ("Vessels and apparatus. Norms and methods of strength calculation"), which includes other parts addressing related calculation methods, materials and fabrication/inspection requirements.

Q: What are the key keywords?

A: Strength calculation, pressure vessel, shell, bottom, weld misalignment, angularity, non‑roundness, technical diagnostics, industrial safety, ГОСТ.