TUBES – Technical Specification


The following manufacturing tolerances apply at a reference temperature of 20° C.

 

Tolerances for roundness
(in % of outer diameter):

Ø   50 mm to Ø 249 mm = ± 1,0%
Ø 250 mm to Ø 450 mm = ± 1,5 %

 

Tolerances for wall thickness (in %) Ø   50 mm to Ø 249 mm = ± 10,0 %
Ø 250 mm to Ø 450 mm = ± 12,5 %
Tolerances for length (in mm) Production lengths up to 5.000 mm ±10,0 mm (automatic cuts within the extrusion line)
Separate cutting service (manual cuts against extra costs)
for lengths (L)
L ≤ 1.000 mm                    ± 1,0 mm
1.000 < L ≤ 2.000 mm     ± 1,5 mm
L > 2.000 mm                     upon demand
A small recess of 0.2 mm may occur at the cut edges.
Tolerances for straightness: maximum deviation: 3.0 mm on 1.000 mm chord length
Optical properties: Optical rings and extrusion marks are unavoidable due to the production process.
Square-tubes:  Specific tolerances upon request