BS EN 754-7:2008

BS EN 754-7:2008 Aluminium and aluminium alloys. Cold drawn rod/bar and tube. Seamless tubes, tolerances on dimensions and form

BS EN 754-7 is the European Standard document and part of the BS EN 754 series, that specifies 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.

This standard only applies to tube produced by the seamless die/mandrel method of extrusion (and then cold drawn to the final dimensions required).

The temper designations used in this part are according to BS EN 515.

This document applies to cold drawn, seamless tube for general engineering applications.

This document does not apply to:

• Cold drawn tube produced by the porthole/bridge method (EN 754-8)
• Tubes delivered in coils (EN 13958)
• Coiled tubes cut to length (EN 13958)

Contents of BS EN 754-7 include:

• Foreword
• Scope
• Tolerances on dimensions
• Diameter - Round tube
• Width, depth or width across flats - squares, rectangles, hexagons, octagons
• Wall thickness variation (eccentricity)
• Length
• Squareness of cut ends
• Tolerances on form
• Straightness
• Convexity-Concavity
• Twist
• Angularity
• Corner and fillet radii
• Depth of dents for round tube
• Wall thickness variation (eccentricity)
• Specifying round tube sizes and tolerances
• Wall thickness variation for tubes
• Bibliography

BS EN 754-7:2008 supersedes BS EN 754-7:1997, which has been withdrawn.