This standard specifies the requirements for tolerances on dimensions and form of aluminium and aluminium alloy extruded profiles (including dimensional tolerance of cross section, curved surface clearance, plane clearance, curvature, twisting degree, shearing slant and length tolerance) and their inspection methods.
This standard is applicable to aluminium and aluminium alloy extruded profiles.
2 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
2.1
circumscribing circle
the smallest circle to fully enclose the cross section of profiles, as shown in Figure 1
Figure 1
3 Grouping and grading
3.1 Profile grouping
The aluminium and aluminium alloy extruded profiles are divided into two groups, as shown in Table 1.
