If you are a design engineer, using this standard correctly will save your workshop hours of confusion.
| Code | Meaning | Application | |------|---------|--------------| | | Butt weld – Flat root face + backing | Used when full penetration is required and backing is retained | en iso 13920-bf
The second letter defines boundaries for physical shape variations, specifically straightness, flatness, and structural parallelism. These metrics use an alternative rating scale: : Fine F : Medium G : Coarse H : Very Coarse. If you are a design engineer, using this
Some key requirements specified in EN ISO 13920-1:2014 include: If you are a design engineer
Understanding the standard requires isolating the two distinct tolerance classes combined within the "BF" identifier: