How to avoid common mistakes in pressure vessel design

I. Compliance Level

1. Clear Classification and Definition: Strictly adhere to the TSG21 standard, accurately classifying pressure vessels based on the product of medium and pressure volume, eliminating misclassification and omissions.

2. Strict Compliance with Current Standards: Adopt the latest design standards, avoid unauthorized changes to safety factor requirements, and ensure all design parameters and technical requirements comply with mandatory standards.

II. Material Selection Level

Adapting to Operating Conditions: Considering the corrosiveness of the medium, operating temperature, and pressure, corrosion-resistant materials are prioritized for corrosive media. For low-temperature conditions, low-temperature impact toughness is verified, and the use of non-standard or substandard materials is strictly prohibited.

III. Structural Design Level

1. Avoid Sharp Corners and Right Angles: Prioritize elliptical heads and other uniformly stressed structures. Openings should avoid high-stress areas and be reinforced.

2. Flange bolt holes should be arranged at the mid-span as required. Pipe and support positions should be repeatedly checked to avoid misplacement or omissions.

IV. Calculation Verification Level

1. Comprehensive coverage of strength, stiffness, and stability calculations; stability verification is emphasized for external pressure vessels; fatigue calculations are supplemented for alternating load conditions.

2. All calculation parameters are aligned with actual working conditions; fixed parameters are not blindly applied; reasonable safety margins are reserved in the results.

V. Drawing Output Level

Strictly verify dimensioning and tolerance annotations to avoid dimensional inconsistencies, omissions, and errors; design documents undergo multi-level signature verification to ensure consistency between drawing parameters and calculation sheets.

VI. Stress Analysis Level

Finite element analysis avoids blindly simplifying the model; loading scenarios and boundary conditions are accurately defined; the effects of thermal stress and cyclic stress are fully considered.