En Iso 13920-bf ^new^

EN ISO 13920-BF

is a specific technical callout for general tolerances in welded constructions, where B represents the tolerance class for linear/angular dimensions and F represents the class for shape and position. 💡 🛠️ Decoding the "BF" Designation

Choose Class A (Fine) if:

Q: Can EN ISO 13920-BF be used for non-welded constructions? A: No, the standard is specifically designed for welded constructions and parts. Other standards may apply to non-welded constructions. en iso 13920-bf

The use of EN ISO 13920-1:2014 provides several benefits, including: EN ISO 13920-BF is a specific technical callout

• Structural steel frameworks for buildings.
• General machine bases and frames.
• Conveyor systems.
• Secondary steel members.

ISO 13920 Welding General tolerances for welded constructions Structural steel frameworks for buildings

• Never use "EN ISO 13920-BF" on a drawing – it is ambiguous.
• Always specify:

  | Nominal Size Range (mm) | Permitted Deviation (Class B) | | :--- | :--- | | 30 to 120 | ± 2 mm | | 120 to 400 | ± 3 mm | | 400 to 1,000 | ± 4 mm | | 1,000 to 2,000 | ± 5 mm | | 2,000 to 4,000 | ± 6 mm | | 4,000 to 8,000 | ± 7 mm | | > 8,000 | ± 8 mm + 0.5 mm per 1,000 mm |

  Stop guessing and start specifying. Are you using BF for your general steelwork, or do you prefer a tighter tolerance?