AWS Certified Welding Inspector — FundamentalsWelding SymbolsMedium
A CWI is reviewing a blueprint for a complex fabrication. The welding symbol includes a supplementary symbol in the tail that reads 'PJP'. What specific information does 'PJP' convey regarding the groove weld?
- AIt specifies a deep penetration weld.
- BIt refers to a post-weld heat treatment requirement.
- CIt indicates a Partial Joint Penetration groove weld.
- DIt denotes a pre-qualified joint procedure.
Show answer & explanationAnswer & explanation
Correct answer: C. It indicates a Partial Joint Penetration groove weld.
In welding symbols, 'PJP' placed in the tail specifically indicates a Partial Joint Penetration groove weld, meaning the weld does not fully penetrate the thickness of the joint.
Why the other options are wrong
- A. While PJP relates to penetration, 'deep penetration' is not the precise term; it's about partial vs. full penetration.
- B. Post-weld heat treatment (PWHT) is indicated by a separate supplementary symbol or note, usually 'PWHT'.
- D. Pre-qualified joint procedures are typically indicated by specific joint designations or notes, not 'PJP'.
PJP in Welding Tail
The abbreviation 'PJP' in the tail of a welding symbol indicates a Partial Joint Penetration groove weld.
- Tail contains supplementary information.
- 'PJP' stands for Partial Joint Penetration.
- Indicates incomplete penetration through joint thickness.
Memory trick: The tail tells the 'tale' of extra details.