: Often paired with ISO 2768-mK (which covers tolerances for machined parts) to provide a complete specification for assemblies that include both welded and machined features.
By stating "General Tolerances ISO 13920-BD" in the title block, engineers do not need to dimension every tolerance on every view. This makes drawings cleaner and easier to read. en iso 13920-bf
[Project Name / Client] Date: [Current Date] Standard Reference: EN ISO 13920:1996 — Welding — General tolerances for welded constructions Symbol reference: BF (Backing / Back weld notation) : Often paired with ISO 2768-mK (which covers
A common debate in fabrication shops—highlighted in community discussions on Reddit —is whether "BF" is actually too loose for modern machinery. [Project Name / Client] Date: [Current Date] Standard
If you encounter :
: By using general tolerances, manufacturers can avoid the high costs of unnecessary high-precision machining where it isn't functional. Typical Applications