NOVIDADES

En Iso 13920-bf

The code "BF" consists of two distinct tolerance classes defined in ISO 13920 :

Class F defines the allowable variation for the shape and position of the structure. Common tolerances for Class F include: +1 mm. Over 120 to 400 mm: +1.5 mm. Over 400 to 1,000 mm: +3 mm. 4. Why Use EN ISO 13920-BF? en iso 13920-bf

[Project Name / Client] Date: [Current Date] Standard Reference: EN ISO 13920:1996 — Welding — General tolerances for welded constructions Symbol reference: BF (Backing / Back weld notation) The code "BF" consists of two distinct tolerance

Class B specifies the following typical tolerances based on the length ( ) of the part: plus or minus 1.0 plus or minus 1.0 plus or minus 3.0 plus or minus 6.0 (Tolerances continue to scale for larger structures) Shape and Position (Class F) Over 400 to 1,000 mm: +3 mm

Angular tolerances depend on the length of the shorter leg of the angle being measured, which determines the allowable deviation at the open end.

The designation refers to a specific combination of tolerance classes within this international standard. What does "BF" stand for?

This system of classes is designed to streamline the documentation process. Instead of individually specifying a tolerance for every dimension on a drawing, the engineer or designer can simply reference the appropriate EN ISO 13920 class in the drawing's title block.

+258868697869 digitalmondlane7@gmail.com
Sexta-feira, Maio 8, 2026

The code "BF" consists of two distinct tolerance classes defined in ISO 13920 :

Class F defines the allowable variation for the shape and position of the structure. Common tolerances for Class F include: +1 mm. Over 120 to 400 mm: +1.5 mm. Over 400 to 1,000 mm: +3 mm. 4. Why Use EN ISO 13920-BF?

[Project Name / Client] Date: [Current Date] Standard Reference: EN ISO 13920:1996 — Welding — General tolerances for welded constructions Symbol reference: BF (Backing / Back weld notation)

Class B specifies the following typical tolerances based on the length ( ) of the part: plus or minus 1.0 plus or minus 1.0 plus or minus 3.0 plus or minus 6.0 (Tolerances continue to scale for larger structures) Shape and Position (Class F)

Angular tolerances depend on the length of the shorter leg of the angle being measured, which determines the allowable deviation at the open end.

The designation refers to a specific combination of tolerance classes within this international standard. What does "BF" stand for?

This system of classes is designed to streamline the documentation process. Instead of individually specifying a tolerance for every dimension on a drawing, the engineer or designer can simply reference the appropriate EN ISO 13920 class in the drawing's title block.