The allowable external pressure depends on which factors?

The allowable external pressure depends on which factors?

• A. Diameter, thickness, and material
• B. Temperature, service life, and coating
• C. Weld type, heat treatment, and grain size
• D. External loads, wind speed, and geometry

Answer: (A)

When a shell is subjected to external pressure, its ability to stay intact without buckling is controlled mainly by how stiff and strong the shell is, which come from its geometry and material properties. The diameter and wall thickness determine stiffness and stability under external squeezing: a larger diameter makes the shell more prone to buckling, while a thicker wall increases resistance. The material itself matters because its strength and elastic properties set how much load the shell can bear before yielding or buckling. Together, diameter, thickness, and material directly define the critical external pressure the shell can withstand. Temperature, service life, and coatings can affect long-term performance (through effects like creep or corrosion), but they do not set the immediate allowable external pressure in the same direct way. Weld type, heat treatment, and grain size influence local metallurgical quality, but the overall external-pressure capacity is governed primarily by the shell’s size and wall and the material’s properties. External loads such as wind and other boundary conditions are important for design, yet the fundamental factors that determine how much external pressure the shell can safely carry are its diameter, thickness, and material.

When a shell is subjected to external pressure, its ability to stay intact without buckling is controlled mainly by how stiff and strong the shell is, which come from its geometry and material properties. The diameter and wall thickness determine stiffness and stability under external squeezing: a larger diameter makes the shell more prone to buckling, while a thicker wall increases resistance. The material itself matters because its strength and elastic properties set how much load the shell can bear before yielding or buckling. Together, diameter, thickness, and material directly define the critical external pressure the shell can withstand.

Temperature, service life, and coatings can affect long-term performance (through effects like creep or corrosion), but they do not set the immediate allowable external pressure in the same direct way. Weld type, heat treatment, and grain size influence local metallurgical quality, but the overall external-pressure capacity is governed primarily by the shell’s size and wall and the material’s properties. External loads such as wind and other boundary conditions are important for design, yet the fundamental factors that determine how much external pressure the shell can safely carry are its diameter, thickness, and material.