AWS Certified Welding Inspector — FundamentalsWelding SymbolsMedium
A welding inspector is reviewing a blueprint that specifies a nondestructive examination (NDE) for a critical butt joint. The NDE symbol for Radiographic Testing (RT) is placed on the reference line, centered above the weld symbol. If the weld symbol is for a double-bevel groove weld, what does the placement of the RT symbol indicate?
- AThe RT is to be performed on the arrow side only.
- BThe RT is to be performed only if visual inspection fails.
- CThe RT is to be performed on both sides of the weld.
- DThe RT is to be performed on the other side only.
Show answer & explanationAnswer & explanation
Correct answer: C. The RT is to be performed on both sides of the weld.
When an NDE symbol, such as RT, is placed directly on the reference line and centered above a symmetrical weld symbol (like a double-bevel groove), it indicates that the examination applies to the weld from both sides.
Why the other options are wrong
- A. For arrow side only, the RT symbol would be above the reference line, on the arrow side of the weld symbol.
- B. The NDE symbol indicates a required test, not a conditional test based on other inspections.
- D. For other side only, the RT symbol would be below the reference line, on the other side of the weld symbol.
NDE Symbol Placement (Both Sides)
When an NDE symbol is centered on the reference line, it indicates that the examination applies to both sides of the weld, particularly for symmetrical joints.
- Centered on reference line.
- Applies to both sides.
- Common for symmetrical welds (e.g., double groove).
Memory trick: Centered means 'complete coverage', like a balanced scale.