UNI EN 13957 : 2009

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Ordering information
5 Requirements
  5.1 Production and manufacturing processes
  5.2 Quality control
  5.3 Chemical composition limits
  5.4 Mechanical properties
  5.5 Surface quality
  5.6 Coil characteristics
  5.7 Additional requirements
6 Tolerances on dimensions
  6.1 General
  6.2 Diameter (outside and/or inside)
  6.3 Wall thickness and wall thickness
      variation (eccentricity)
  6.4 Length
  6.5 Squareness of cut ends
  6.6 Cut end quality
7 Tolerances on form
  7.1 General
  7.2 Straightness
Annex A (informative) - Wall thickness variation
        (eccentricity)
      A.1 General
      A.2 Specifying round tube sizes and tolerances
Bibliography

Describes the tolerances on dimensions and form of round aluminium and aluminium alloys porthole extruded tubes with an outside diameter (OD) of over 2 mm up to and including 50 mm supplied in coil form or in straight lengths cut from coiled material.