Visual Testing (VT) Practice Exam

What does the flag symbol on a welding symbol indicate?

1. Shop weld

2. Repair weld

3. Field weld

4. Weld all around

The correct answer is: Field weld

The flag symbol on a welding symbol is used to indicate a field weld. This symbol signifies that the weld must be performed at the construction site rather than in a shop environment. Field welding is typically required when components need to be joined after being transported to the construction location, making it essential for ensuring that structures are assembled correctly and efficiently on-site. In the context of welding symbols, the distinction between field welds and other types, such as shop welds or repair welds, is crucial for fabricators and welders. Knowing when to apply a field weld ensures that specific requirements regarding exposure to environmental factors, accessibility, and joint conditions unique to the location can be met during the welding process.