Final answer:
Single welds are welds on only one side of a joint, and double welds are performed on both sides. The choice between these depends on the number of passes, thickness of the weld, and the welding technique used.
Step-by-step explanation:
The difference between single welds and double welds typically refers to the way the components being welded together are joined. A single weld is a weld on one side of a joint, whereas a double weld is applied to both sides. The differences between them can often relate to the number of passes or layers made during the welding process, the overall thickness of the weld, and in some cases, the welding technique or method used.
For instance, a single pass weld is a type of single weld where the welder makes only one pass along the joint. By contrast, a double weld might involve multiple passes on both sides of the joint, creating a more robust and possibly thicker weld. The choice between a single or double weld is influenced by the necessary strength of the joint, the material's properties, and the type of structure being welded.
Overall, the selection between single and double welds takes into consideration the specific requirements of the welding job, including strength, load-bearing capacity, and code compliance. Welders must evaluate the best approach to ensure the integrity and performance of the welded connection.