NEN EN 754-7 : 2016

Foreword
1 Scope
2 Tolerances on dimensions
    2.1 General
    2.2 Diameter - round tube
    2.3 Width, depth or width across flats - squares,
          rectangles, hexagons, octagons
    2.4 Wall thickness
    2.5 Length
    2.6 Squareness of cut ends
3 Tolerances on form
    3.1 General
    3.2 Straightness
    3.3 Convexity-concavity
    3.4 Twist
    3.5 Angularity
    3.6 Corner and fillet radii
    3.7 Depth of dents for round tube

Defines the tolerances on dimensions and form for aluminium and aluminium alloys cold drawn seamless tubes with an outside diameter (OD) from 3 mm to 350 mm (round tube) or with a cross section contained within a circumscribing circle (CD) from 8 mm to 300 mm (other than round tube) supplied in straight lengths.