What is the primary concern when welding joints after laying out bottom plates?

• A. Minimizing cost
• B. Distortion from shrinkage
• C. Alignment of the plates
• D. Thickness of the weld

Answer: (B)

The primary concern when welding joints after laying out bottom plates is distortion from shrinkage. During the welding process, the heat causes the metal to expand, and as it cools, it contracts. This contraction can lead to warping or distortion of the plates and joints if not properly managed. To mitigate this distortion, techniques such as correct sequencing of welds, appropriate preheating, and post-weld treatments can be employed. Ensuring that the welded structure retains its intended shape and integrity is critical for the overall performance and safety of the welded tank.

While minimizing cost, alignment of the plates, and the thickness of the weld are important considerations in the overall welding process, they do not directly address the immediate concern related to the physical changes that occur in the material due to heating and cooling during welding.