Cylindrical pressure vessels installed horizontally are most commonly supported using which type of support?

Introduction / Context:
Pressure vessels require supports that safely transmit loads to foundations while accommodating thermal expansion and avoiding excessive local stresses. Horizontal cylindrical vessels use specific supports tuned to shell geometry.

Given Data / Assumptions:

• Horizontal orientation with typical length-to-diameter ratios.
• Conventional petrochemical service and foundations.
• No seismic/anchor special designs considered beyond common practices.

Concept / Approach:
Saddle supports cradle the cylindrical shell over a broad area, distributing loads and limiting localized stresses. One saddle is often fixed (anchored) and the other is sliding to accommodate thermal expansion.

Step-by-Step Solution:
Identify vessel orientation: horizontal cylindrical.Select standard support type: two saddles spaced near head–shell junctions.Purpose: distribute load and allow expansion (one fixed, one sliding).

Verification / Alternative check:
Design handbooks specify saddle supports as the default for horizontal drums; skirts are used for vertical vessels; lugs for small equipment; guy wires are not used for pressure vessel dead loads.

Why Other Options Are Wrong:
Lug: suitable for small vertical vessels—not for large horizontal drums.Skirt: standard for vertical columns, not horizontal shells.Guy wires: not a primary support system for rigid pressure vessels.Ring-only floor grating: not a structural support.

Common Pitfalls:
Placing saddles too close together, increasing midspan bending.Neglecting sliding saddle to absorb thermal growth, causing nozzle stress.

Final Answer:
Saddle support