Supports for vertical process vessels: Which of the following is NOT used for vertical vessels?

Introduction / Context:
Support selection depends on vessel orientation, size, and thermal expansion needs. Correct supports are critical for mechanical integrity and nozzle alignment.

Given Data / Assumptions:

• Vessels are cylindrical.
• Vertical vessels are mounted upright on foundations or structures.

Concept / Approach:
Vertical vessels are commonly supported by skirts (for tall/heavy towers), columns or legs (for smaller vessels), or brackets (for wall/structure mounting). Saddles, by contrast, cradle a horizontal cylinder and are inappropriate for vertical orientation.

Step-by-Step Solution:

Verification / Alternative check:
Mechanical design handbooks depict standard support details; vertical vessels rarely, if ever, use saddles.

Why Other Options Are Wrong:

• Brackets, skirts, and columns are well-established supports for vertical vessels.

Common Pitfalls:
Assuming one support fits all orientations; each has distinct load paths and thermal considerations (e.g., skirts accommodate nozzle loads and differential expansion).

Final Answer:
Saddles.