En Iso 13920-bf

The designation EN ISO 13920-BF a specific set of general tolerances for welded constructions, combining two different accuracy classes defined in the for linear/angular dimensions and for form and position Breakdwon of "BF" When this standard is cited on a drawing (e.g., ISO 13920-BF ), it indicates the following requirements: B (Linear/Angular Dimensions):

For a length of 1 meter, the allowed deviation is approximately ±2plus or minus 2 Covers straightness, flatness, and parallelism. en iso 13920-bf

Specifically targets "straightness" and "parallelism" to prevent "banana" shaped beams. The designation EN ISO 13920-BF a specific set

: Used by firms like Hazemag and C.C. JENSEN to ensure structural components fit together without excessive machining costs. JENSEN to ensure structural components fit together without

| Nominal Angle Leg Length (mm) | Permitted Deviation (Class B) | | :--- | :--- | | Up to 400 | ± 30 minutes (± 0.5°) | | 400 to 1,000 | ± 20 minutes (± 0.33°) | | Over 1,000 | ± 15 minutes (± 0.25°) |

: The international standard for "General tolerances for welded constructions". : Refers to the tolerance class for linear and angular dimensions