EN 10225

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EN 10225 weldable structural steel pipe

EN 10225 is a European standard that specifies weldable structural steels for fixed offshore structures, both in plates and sections.

Designed to withstand the extreme marine environment, the standard covers grades from S355G2+N to S690QLO. Plates are available with a maximum thickness of 200 mm and sections with a maximum thickness of 150 mm.

With a yield strength of up to 690 MPa and excellent toughness down to -40°C, these steels are ideal for oil and gas platforms, wind farms and other offshore installations, but exclude subsea pipelines and process equipment.

EN 10225 Specification

Şartname Scope of application
S355G1 Low alloy, high strength structural steel suitable for marine and other harsh environments.
S355G2 Similar to S355G1, but may differ in specific chemical composition.
S355G3 Suitable for environments with higher toughness requirements.
S420G1 Higher strength low alloy steel, used to carry greater loads.
S420G2 Similar to S420G1, with stricter requirements on chemical composition.
S450G1 High-strength steel, suitable for higher engineering requirements.
S450G2 Similar to S450G1, for more demanding applications.
S690G1 High-strength steel, often used in heavy-duty construction and specialty applications.
S690G2 Similar to S690G1, with good welding properties.

Boyutlar

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Chemical Composition And Mechanical Properties

Dimensions, Diameter Tolerance and Mass Per Unit Length
Specified Outside Diameter D, mm Thread Size R Dış Çap H Heavy Series M Medium Series
max, (mm) min, (mm) Wall Thickness, (mm) Mass Per Unit Length of Bare Tube Wall Thickness, (mm) Mass Per Unit Length of Bare Tube
Plain End (kg/m) Socketed (kg/m) Plain End (kg/m) Threaded and Socketed (kg/m)
10.2 1/8 10.6 9.8 2.6 0.487 0.490 2.0 0.404 0.407
13.5 1/4 14 13.2 2.9 0.765 0.769 2.3 0.641 0.645
17.2 3/8 17.5 16.7 2.9 1.02 1.03 2.3 0.839 0.845
21.3 1/2 21.8 21 3.2 1.44 1.45 2.6 1.21 1.22
26.9 3/4 27.3 26.5 3.2 1.87 1.88 2.6 1.56 1.57
33.7 1 34.2 33.3 4.0 2.93 2.95 3.2 2.41 2.43
42.4 1 1/4 42.9 42 4.0 3.79 3.82 3.2 3.1 3.13
48.3 1 1/2 48.8 47.9 4.0 4.37 4.41 3.2 3.56 3.6
60.3 2 60.8 59.7 4.5 6.19 6.26 3.6 5.03 5.1
76.1 2 1/2 76.6 75.3 4.5 7.93 8.05 3.6 6.42 6.54
88.9 3 89.5 88 5.0 10.3 10.5 4.0 8.36 8.53
114.3 4 115 113.1 5.4 14.5 14.8 4.5 12.2 12.5
139.7 5 140.8 138.5 5.4 17.9 18.4 5.0 16.6 17.1
165.1 6 166.5 163.9 5.4 21.3 21.9 5.0 19.8 20.4
aFor relationship between specified outside diameter (D), thread size (R), and nominal diameter (DN), see Annex A. T = specified wall thickness.

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ASTM A106 Dikişsiz Çelik Boru

Chemical Composition (Cast Analysis) and Mechanical Properties
Çelik Sınıfı Kimyasal Bileşim % Mekanik Özellikler
Çelik Adı Çelik Numarası C max Mn max P max S max Upper Yield Strength ReH min. (MPa) Tensile Strength Rm (MPa) Elongation A min. %
S 195T 1.0026 0.20 1.40 0.035 0.030 195 320 ila 520 20
For welded tubes the tolerance on wall thickness is: ± 10%.
for the M and H series and Type L; ± 8% with the plus tolerance limited by the mass tolerance, for Types L1 and L2.
The mass tolerance on welded tubes is:
± 7.5% on bundles of 10 tons or more, for M and H series and Type L;
± 10% on individual tubes for Types L1 and L2.
For seamless tubes the tolerance on wall thickness is ± 12.5%.
The maximum tolerance does not apply if the actual weight of a bundle does not exceed the theoretical weight, calculated from the nominal mass per unit length (see Tables 2, B1, B2, or B3, as appropriate), by more than +7.5%.