Rolling Tolerances to EN 10210-2:1997 for hot-finished Elliptical Hollow Sections

Designation Property  Tolerance 
Outside dimension D or B ±1% with a min of ±0.5mm
Thickness t –10% Note. Positive deviation limited by mass tolerance
Twist V 2mm +0.5mm/m length max.
Straightness e Maximum 0.2% of the total length
Mass M ±6% on individual lengths
Length +150mm / –0mm