En Iso 13920-bf Now

"General tolerances according to EN ISO 13920 apply, and the weld preparation follows a 'BF' type (often from ISO 9692-1 – butt weld preparation)."

If you need the exact for such a preparation (e.g., root face, gap), that would be found in ISO 9692-1, not ISO 13920. en iso 13920-bf

This is the "intermediate" class for lengths and angles. It defines the allowable deviation for dimensions such as the length of a beam or the angle of a joint. For a 1-meter span, class B might allow a variation of a few millimeters, providing a balance between functional fit and manufacturing speed. "General tolerances according to EN ISO 13920 apply,

If you need me to: