Class F governs how much a part can warp or sit out of alignment (straightness, flatness, and parallelism): : Max deviation of : Max deviation of : Max deviation of Why This is Used Using a general tolerance like EN ISO 13920-BF
If your project calls for Class tolerances (whether BD or BC), you are working within the most common parameters for general fabrication. en iso 13920-bf
(ISO 13920 has no BF). It most likely means: "Weld edge preparation type BF according to ISO 9692-1, with general tolerances according to EN ISO 13920." Class F governs how much a part can
When a drawing specifies , it is referring to: it is referring to: