Which type of weld requires a separate reference line for each weld?

A multiple type weld involves using different types or sizes of welds in various locations on a single joint, which necessitates the use of separate reference lines for each weld. These reference lines clarify the specifics for each weld type, such as its size, length, and placement, ensuring that the welder understands exactly what is required for each section of the joint. This is particularly important in complex assemblies where different welds may have different specifications.

In contrast, other types of welds generally do not require multiple reference lines. For example, a single weld typically only uses a single reference line to indicate its specifications. Continuous welds are uniform along a joint and can follow a single line as well. Staggered welds, while they may be used in some applications, typically follow a more straightforward pattern and may not need a separate reference line for each individual weld instance.