En Iso 13920-bf -

The first letter defines tolerances for lengths, widths, and angles.

of the different tolerance classes (A, B, C, and D) to see which fits your project best? EN ISO 13920 en iso 13920-bf

The next time you see "EN ISO 13920-BF" on a blueprint, you will know exactly what the welder can and cannot deliver. Use this knowledge to design smarter, fabricate faster, and inspect fairly. The first letter defines tolerances for lengths, widths,

is the international standard titled "Welding — General tolerances for welded constructions." en iso 13920-bf