AWS Certified Welding Inspector — FundamentalsWelding SymbolsMedium
A welding symbol indicates a fillet weld with a leg size of 6 mm. Below the fillet weld symbol, the number '50' is placed. What does '50' signify in this context?
- AThe depth of penetration in millimeters.
- BThe number of weld passes required.
- CThe pitch of intermittent welds in millimeters.
- DThe length of the weld in millimeters.
Show answer & explanationAnswer & explanation
Correct answer: D. The length of the weld in millimeters.
When a number is placed to the right of a basic weld symbol (and not separated by a dash), it indicates the length of the weld. If it were a dashed number, it would indicate pitch for intermittent welds.
Why the other options are wrong
- A. Depth of penetration is typically not directly indicated by a single number next to a fillet weld symbol; it's more relevant for groove welds.
- B. The number of weld passes is usually specified in the tail or by other means, not directly next to the fillet symbol in this manner.
- C. Pitch of intermittent welds is indicated by a number separated by a dash from the weld length (e.g., 50-100).
Weld Length and Pitch
In welding symbols, the length of a weld is indicated by a number placed to the right of the basic weld symbol. For intermittent welds, the pitch (center-to-center spacing) is specified after the length, separated by a dash.
- Length = number to the right of the weld symbol.
- Pitch = number after a dash, following the length (e.g., 50-100).
- If no length is specified, the weld is continuous for the full length of the joint.
Memory trick: Length is right, pitch is dashed, size is left, depth is within.