En Iso 13920-bf !free! May 2026

EN ISO 13920-BF is a technical specification used in engineering drawings to define general tolerances for welded constructions. It ensures that parts are manufactured to a consistent, economically viable level of precision without requiring individual tolerances for every dimension. Breakdown of the Specification

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If your assembly requires high-precision robotic integration later, BF might be too loose. But for 90% of general structural steel, it’s the gold standard for balancing cost and quality. en iso 13920-bf

Class F: This class specifically governs the geometric tolerances of the weldment, including how straight a part is or how flat a surface must be. 2. Tolerance Tables for Class B (Linear & Angular)

Geometric Tolerances: Specifically targets "straightness" and "parallelism" to prevent "banana" shaped beams. EN ISO 13920-BF is a technical specification used

Correction: In the ISO 13920 coding system, the second letter regarding geometrical tolerances is either C (Fine) or D (Medium). There is no "F" class for geometry.

The use of EN ISO 13920-BF offers several benefits and advantages, including: But for 90% of general structural steel, it’s

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