BS EN 755-7:2008 Aluminium and aluminium alloys. Extruded rod/bar, tube and profiles. Seamless tubes, tolerances on dimensions and form
BS EN 755-7 is the European Standard document and part of the BS EN 755 series, that specifies the tolerances on dimensions and form for aluminium and aluminium alloy extruded seamless tubes with an outside diameter (OD) from 8 mm to 450 mm or with a cross section contained within a circumscribing circle (CD) from 10 mm to 350 mm (other than round tube) supplied in straight lengths.
Part 7 of BS EN 755 only applies to tube produced by the seamless die/mandrel method of extrusion. This standard applies to extruded seamless tube for general engineering applications only.
The temper designations used in this part are according to BS EN 515.
This European Standard does not apply to:
- Extruded tubes produced by porthole/bridge method
- Tubes delivered in coils
- Coiled tubes cut to length.
Contents of BS EN 755-7 include:
- Foreword
- Scope
- Alloy groups
- 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BS EN 755-7:2008 supersedes BS EN 755-7:1998, which has been withdrawn.
