Rolling tolerances to BS EN 10210-2: 2006 for Hot-Finished Circular Hollow Sections
| Designation |
Property |
Tolerance |
 |
Outside diameter D |
±1.0% with a min of ±0.5 mm and a max of ±10 mm |
| Thickness t |
Welded |
–10% |
| Seamless |
–10% but between 10% and 12.5% may occur over not more than 25% of the circumference |
| Note: Positive deviation is limited by mass tolerance |
| Measured at the centre of the length |
Straightness (x or y direction) |
0.20% L |
| Mass per unit length |
Mass of section |
Welded |
±6.0% on individual lengths |
| Seamless |
+8.0% –6% on individual lengths |
| Standard |
Length L |
+150 mm |
–0 mm |
