Which part of the symbol is commonly used to indicate field welding?

Which part of the symbol is commonly used to indicate field welding?

• A. The tail
• B. A supplementary symbol
• C. The arrow
• D. The weld size

Answer: (B)

In welding symbols, the main part along the reference line shows what type of weld is required and its basic size, but any extra instructions beyond that are carried by supplementary symbols. Indicating a weld must be done in the field is one of those extra instructions, and it’s conveyed by a supplementary symbol rather than by altering the main weld symbol itself. The tail is reserved for notes or process references, the arrow simply points to the joint, and the weld size specifies the dimension. So, to communicate field welding, you use a supplementary symbol attached to the weld symbol.

In welding symbols, the main part along the reference line shows what type of weld is required and its basic size, but any extra instructions beyond that are carried by supplementary symbols. Indicating a weld must be done in the field is one of those extra instructions, and it’s conveyed by a supplementary symbol rather than by altering the main weld symbol itself. The tail is reserved for notes or process references, the arrow simply points to the joint, and the weld size specifies the dimension. So, to communicate field welding, you use a supplementary symbol attached to the weld symbol.