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Tubes for pressure equipment used at the room temperatures

Application examples:

  • water supply systems;
  • gas installations;
  • chemical industry.
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Standards

  • EN 10216-1 Seamless steel tubes for pressure purposes. TDC. Part 1: Non-alloy steel tubes with specified room temperature properties.
  • EN 10305-1 (upon agreement) Steel tubes for precision applications. Part 1: Seamless cold drawn tubes.
  • DIN 2391-1 (upon agreement) Seamless precision steel tubes. Part 1: Dimensions. Part 2: TDC.
  • DIN 1629 Seamless circular tubes of non-alloy steel with special quality requirements. TDC.
  • DIN 1630 Seamless circular tubes of non-alloy steel with very high quality requirements. TDC.

Steel grades

  • according to EN 10216-1: P195TR1, P195TR2, P235TR1, P235TR2, P265TR1, P265TR2
  • according to DIN 1629: St37.0, St44.0, St52.0
  • according to DIN 1630: St37.4, St44.4, St52.4

Steel designation according to EN:

P – steel for pressure equipment
235 – minimum yield strenght in N/mm2
T – steel for tubes
R – room temperature
1,2 – group of quality
TR1 – fluid transportation – general purposes
TR2 – piping and pressure purposes

ShapingQualityCondition (wg EN 10216-1)
Hot finished TR1as rolled or normalized or normalising formed
TR2 normalized or normalising formed
Cold finished TR1 i TR2normalized

Średnica zewnętrzna
D [mm]

Dopuszczalne odchyłki
średnicy zewnętrznej D

Dopuszczalne odchyłki grubości ścianki T
w zależności od stosunku T/D

≤ 0,025

> 0,025
≤ 0,050

> 0,050
≤ 0,10

> 0,10

D ≤ 219,1

± 1 % lub ± 0,5 mm w zależności od tego, które większe

± 12,5 % lub 0,4 mm w zależności od tego, które większe

D > 219,1

± 20 %

± 15%

± 12,5 %

± 10 % *

* For D ≥ 355,6 mm local deviation above the upper wall thickness of further 5% T is allowed.

Exact length tolerances

L ≤ 6000 mm: 0 + 10 mm
6000 mm < L ≤ 12 000 mm: 0 + 15 mm L > 12 000 mm: upon agreemen

Dimensions and weight of seamless steel tubes according to EN 10220

Dimensions and weight of precision seamless tubes according to EN, DIN