| | EN ISO 13920 Tolerance Class B: Limit Deviation (± mm) | | :--- | :--- | | 2 to 30 | ± 2 | | >30 to 120 | ± 2 | | >120 to 400 | ± 3 | | >400 to 1000 | ± 4 | | >1000 to 2000 | ± 6 | | >2000 to 4000 | ± 8 | | >4000 to 8000 | ± 10 | | >8000 to 12000 | ± 12 | | >12000 to 16000 | ± 14 | | >16000 to 20000 | ± 16 | | >20000 | As agreed upon between parties. |
ISO 13920:2023 - Welding Tolerances for Dimensions and Positions en iso 13920-bf
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In the designation , the letters represent the following specific accuracy levels: 1. Class "b" (Linear and Angular Dimensions) | | EN ISO 13920 Tolerance Class B:
Utilizing EN ISO 13920-BF streamlines manufacturing by reducing engineering design time, eliminating the need for individual tolerance notes, and lowering costs by avoiding over-specification. It ensures consistent quality across global suppliers. QA personnel verify compliance using standard metrology: ISO 13920 - iTeh Standards It ensures consistent quality across global suppliers
Specifying "Class B" avoids the high costs associated with the ultra-precise "Class A," while preventing the safety or assembly risks of the looser "Class C".