Steel grade: S195T

Tubes should be produced as seamless (S) or welded (W).

Series (M – medium, H – heavy) and types (L or L1 or L2) – designation used in combination with diameter determines the wall thickness and weight per length unit

Tolerance of the wall thickness for welded tubes:
± 10 % for M and H series or L type;
– 8 % + limited by weight tolerance for L1 and L2 types.

Weight tolerance for welded tubes:
± 7,5 % for bundles ≥ 10 t, for M and H series and L type;
+ 10 % / – 8 % for each tube L1 and L2 type.

Lengths and tolerances (welded tubes)

standard 6 m or 6,4 m: + 150 mm / – 50 mm
random 4 m ≤ L ≤ 16 m with the range 2 m for order: up to 10 % of the tubes provided may be less than the length ordered, but not less than 75 % of the minimum length
exact
L ≤ 6 m: + 10 mm
6 < L ≤ 12: + 15 mm L > 12: + upon agreement

For tubes with outside diameter ≥ 33,7 mm deviation of straigthness should be less than 0,002 L for each tube (L = length of the tube).

Tubes should be subject to water testing or electromagnetic testing.

At least:
– producer;
– serie (H or M) or type (L, L1 or L2);
– S (for seamless) or W (for welded).