What are the tolerances on shape of EN 10210-2 hollow sections?

Characteristic

Circular hollow sections

Square and rectangular hollow sections

Elliptical hollow sections

Outside dimensions (D, B, H)

±1 % with a minimum of ± 0,5 mm and a maximum of ± 10 mm

± 1 % a with a minimum of ± 0,5 mm

Thickness (T)

-10 % b , c

Out-of-roundness (O)

2 % for hollow sections having a diameter to thickness ratio not exceeding 100 d

—

Concavity/Convexity (x1, x2) e

—

1 %

—

Squareness of side (q)

—

90° ± 1°

—

External corner profile (C1, C2 or R) f

—

3T maximum at each corner

—

Twist (V)

—

2 mm a plus 0,5 mm/m length a

Straightness (e)

0,2 a % of total length and 3 mm over any 1 m length

Mass (M)

± 6 % on individual delivered lengths g

a. For elliptical hollow sections of sizes H < 250 mm the permitted tolerance is twice the value given in this table.

b. The positive deviation is limited by the tolerance on mass

c. For seamless sections thicknesses of less than 10 % but not less than 12,5 % of the nominal thickness may occur in smooth transition areas over not more than 25 % of the circumference.

d. Where the diameter to thickness ratio exceeds 100, the tolerance on out-of-roundness shall be agreed.

e. The tolerance on convexity and concavity is independent of the tolerance on outside dimensions.

f. The sides need not be tangential to the corner arcs.

g. The positive tolerance on the mass of seamless hollow sections is 8 %.