Calculation of thermoplastic tanks and apparatus - Vertical cylindrical non-pressurised tanks - Flat roofs

This document provides comprehensive guidelines for the structural calculation of vertical cylindrical atmospheric tanks with flat roofs, specifically designed for thermoplastic materials. It serves as an auxiliary reference to the primary design standard issued by the German Association of Mechanical Engineers. The content outlines critical methodologies for assessing stress distributions, load combinations, and material behavior under operational conditions. Detailed procedures address the unique properties of thermoplastics, ensuring safety and durability in the manufacturing and assembly of such storage equipment. The guidance covers various design scenarios, including thermal expansion effects, wind loads, and internal pressure variations relevant to atmospheric conditions. It establishes clear parameters for thickness determination, joint design, and support configurations to prevent failure modes typical in large-scale storage solutions. Engineers and designers utilize this technical reference to validate their calculations against established industry practices for thermoplastic vessels. The approach emphasizes a systematic analysis to maintain structural integrity throughout the service life of the equipment. By adhering to these prescribed calculation rules, practitioners can ensure that storage systems meet rigorous engineering requirements without relying on empirical shortcuts. This auxiliary sheet focuses exclusively on the mathematical and mechanical aspects necessary for the reliable design of flat-roofed cylindrical tanks.