What does a flag signify in a welding symbol?

In welding symbols, a flag signifies a field weld. This is important because it indicates that the weld should be made at a location other than the shop or manufacturing facility, typically at the construction site where materials are assembled and joined. Field welds are often necessary for structural integrity, as they connect components that may be difficult to assemble in a controlled environment.

Understanding the designation of field welds is crucial for welders, as it informs them about the conditions and potential challenges of working on-site. Recognizing this symbol ensures that welders are properly prepared for the specific requirements and environment of the job, which can differ significantly from that of a controlled shop setting.