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(titled “Welding — General tolerances for welded constructions — Dimensions for lengths and angles; shape and position”) specifies general tolerances, permissible deviations and requirements for weldments' dimensions, shapes and positions when no specific tolerances are given in contract documents.

EN ISO 13920-BF specifies general tolerances for welded constructions and position tolerances for plates. The standard applies to welded constructions made from steel, aluminum, and other metals. The tolerances specified in EN ISO 13920-BF are essential for ensuring that welded products meet the required quality and accuracy standards. en iso 13920-bf

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. The tolerances specified in EN ISO 13920-BF are

You will most often see this code on technical drawings for: : Large structural steel assemblies. High Voltage Equipment : Such as corona rings and shields. Other standards may apply to non-welded constructions

This refers to the tolerance for straightness, flatness, and parallelism. While linear dimensions use letters A through D, shape and position tolerances use E through H. Class F is the second-most precise level in this category (often considered "Medium" for shape). Why Use EN ISO 13920-BF?

The designation refers to a specific set of general tolerances for welded constructions, combining two distinct classes of accuracy defined by the ISO 13920 standard . Breakdown of the Code