AWS Certified Welding Inspector — FundamentalsWelding SymbolsHard
A welding inspector is reviewing a blueprint for a flare-V groove weld on a pipe. The welding symbol has a flare-V groove symbol on the arrow side of the reference line. There is a number '6' to the left of the flare-V symbol. What does this '6' most likely represent?
- AThe root opening.
- BThe leg size of the weld.
- CThe effective throat of the weld.
- DThe groove angle.
Show answer & explanationAnswer & explanation
Correct answer: C. The effective throat of the weld.
For flare-V and flare-bevel groove welds, the dimension to the left of the weld symbol typically indicates the effective throat of the weld, as the groove geometry is largely determined by the radius of the curved member.
Why the other options are wrong
- A. Root opening is usually shown within the groove symbol or near it, not typically as the primary dimension to the left.
- B. Leg size is specific to fillet welds, not groove welds.
- D. The groove angle for flare welds is inherently determined by the radius of the curved parts and is not typically dimensioned as a single angle '6'.
Flare-V Effective Throat
For flare-V groove welds, the dimension to the left of the weld symbol usually specifies the effective throat, which is the minimum distance from the root of the weld to its face.
- Specific to flare-type grooves.
- Dimension on the left.
- Represents weld strength/size.
Memory trick: Flare-V's 'effective' size is on the 'left' side.