ISO 13920 Welding General tolerances for welded constructions
The permissible deviation for angles, expressed both in angular units (degrees and minutes) and as a linear deviation per unit length (mm/m). The linear values are calculated based on the length of the shorter leg of the angle, providing a practical method for measurement.
: Gives quality assurance teams clear, universally recognized metrics to accept or reject welded components. Practical Application and Measurement Guidelines
Ensuring manufactured parts meet design requirements.
: Classes range from A (Fine), B (Medium), C (Coarse), to D (Very Coarse).
| Nominal Size (mm) | Permitted Deviation (Class B) | | :--- | :--- | | Up to 120 | 1 mm | | 120 to 400 | 2 mm | | Over 400 | 3 mm |
To understand the standard, one must decode the suffix:
Note: Total flatness or straightness deviations are evaluated across the entire designated surface or section segment indicated on the technical drawing. Workshop Best Practices for Meeting BF Tolerances
En Iso 13920-bf | iOS |
ISO 13920 Welding General tolerances for welded constructions
The permissible deviation for angles, expressed both in angular units (degrees and minutes) and as a linear deviation per unit length (mm/m). The linear values are calculated based on the length of the shorter leg of the angle, providing a practical method for measurement.
: Gives quality assurance teams clear, universally recognized metrics to accept or reject welded components. Practical Application and Measurement Guidelines en iso 13920-bf
Ensuring manufactured parts meet design requirements.
: Classes range from A (Fine), B (Medium), C (Coarse), to D (Very Coarse). Workshop Best Practices for Meeting BF Tolerances
| Nominal Size (mm) | Permitted Deviation (Class B) | | :--- | :--- | | Up to 120 | 1 mm | | 120 to 400 | 2 mm | | Over 400 | 3 mm |
To understand the standard, one must decode the suffix: en iso 13920-bf
Note: Total flatness or straightness deviations are evaluated across the entire designated surface or section segment indicated on the technical drawing. Workshop Best Practices for Meeting BF Tolerances