AWS Certified Welding Inspector — FundamentalsWelding SymbolsHard
A welding inspector is analyzing a blueprint for a critical pipe intersection. The welding symbol for a single-bevel groove weld includes a dimension of '1/8' to the left of the weld symbol, and '60°' inside the symbol. What does the '1/8' dimension specifically represent in this context?
- AThe effective throat of the weld.
- BThe depth of the root face.
- CThe depth of the weld preparation.
- DThe root opening.
Show answer & explanationAnswer & explanation
Correct answer: C. The depth of the weld preparation.
For groove welds, when the depth of preparation is less than the full thickness of the joint (a partial penetration groove weld), this dimension is placed to the left of the weld symbol. The '1/8' indicates the specified depth of the bevel preparation.
Why the other options are wrong
- A. Effective throat for partial penetration groove welds is typically the depth of preparation, but the symbol specifically shows 'depth of preparation'.
- B. Root face is typically shown in parentheses below the root opening.
- D. Root opening is located below the weld symbol.
Groove Weld Depth of Preparation
For groove welds, especially partial penetration, the depth of the weld preparation is indicated by a dimension placed to the left of the groove weld symbol.
- Located to the left of the weld symbol.
- Specifies the depth of the groove.
- Critical for partial penetration welds.
Memory trick: Depth on the left, root below, angle inside, watch it grow.