: Ensuring surfaces are sufficiently flat and edges are straight. Why It Is Used
Thus, – it likely means: Use ISO 13920 (unspecified class, usually Class D or E) + BF weld prep (ISO 9692-1). en iso 13920-bf
If your "BF" actually means "B + Filter," you might add: : Ensuring surfaces are sufficiently flat and edges
EN ISO 13920-BF is a European standard that specifies general tolerances for welded constructions and parts. The standard is part of the ISO 13920 series, which provides guidelines for the tolerancing of welded parts and assemblies. The "BF" in the designation refers to the specific part of the standard that deals with general tolerances for welded constructions. The standard is part of the ISO 13920
is a specific tolerance designation for welded constructions that combines two different accuracy levels for dimensions and geometry .
