EN 10224

seamless steel pipe_Seamless API 5CT Casing Pipe

BS EN 10224 Carbon Steel Tubes

The EN 10224 standard specifies steel pipes for conveying gases and liquids. The steel pipes to this standard are mainly carbon steel and alloy steel, and apply to both welded and seamless pipes. Common grades include L235, L275 and L355.

EN 10224 ensures the safety and reliability of steel pipes for drinking water, sewage and natural gas. It requires traceability markings on the pipes, and certificates of conformity and test reports must be available when leaving the factory. This standard pipe is widely used in water, wastewater and natural gas projects.

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BS EN 10224 Specification

Production Standard EN10224
Manufacturing Processes BW, ERW, SMLS, SAW
Outside Diameter BW: 26.9-114.3mm
ERW: 26.9-610mm
SMLS: 26.9mm -711mm
SAW: 168.3-2743mm
Wall Thickness BW: 2-6.3mm
ERW: 1.4-16mm
SMLS: 2-100mm
SAW: 6.3-50mm
Pipe Length 3-18m
Steel Grade L235, L275, L355
Corrosion Prevention Lacquer, Varnish, Oiling, Galvanizing,PE
End Processes Square Cut, Bevelling, Threading, Socket
Further Processing Welding, Bending, Hole Drilling, Punching, Swaging, Tapering, Flaring, Expanding

Dimension

Outside
Diameter
mm		 Wall Thickness mm
2.0 2.3 2.6 2.9 3.2 3.6 4.0 4.5 5.0 5.4 5.6 6.3 7.1 8.0 8.8 10 11 12.5 14.2 16 17.5 20 22.2 25
26.9 ● ● ● ● ● ● ● ● ● ● ● ● ● ●
30 ● ● ● ● ● ● ● ● ● ● ● ● ● ●
31.8 ● ● ● ● ● ● ● ● ● ● ● ● ● ●
32 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
33.7 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
35 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
38 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
40 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
42.4 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
44.5 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
48.3 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
51 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
54 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
57 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
60.3 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
63.5 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
70 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
73 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
76.1 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
82.5 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
88.9 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
101.6 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
108 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
114.3 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
127 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
133 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
139.7 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
141.3 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
152.4 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
159 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
168.3 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
177.8 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
193.7 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
219.1 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
244.5 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
273 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
323.9 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
355.6 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
406.4 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
457 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
508 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
559 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
610 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
660 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
711 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
762 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
813 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
864 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
914 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
1016 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
1067 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
1118 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
1168 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
1219 ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●
1321 ● ● ● ● ● ● ● ● ● ● ● ● ● ●
1422 ● ● ● ● ● ● ● ● ● ● ● ● ● ●
1524 ● ● ● ● ● ● ● ● ● ● ● ● ●
1626 ● ● ● ● ● ● ● ● ● ● ● ● ●
1727 ● ● ● ● ● ● ● ● ● ● ● ●
1829 ● ● ● ● ● ● ● ● ● ● ● ●
1930 ● ● ● ● ● ● ● ● ● ● ●
2032 ● ● ● ● ● ● ● ● ● ● ●
2134 ● ● ● ● ● ● ● ● ● ●
2235 ● ● ● ● ● ● ● ● ● ●
2337 ● ● ● ● ● ● ● ● ●
2438 ● ● ● ● ● ● ● ● ●
2540 ● ● ● ● ● ● ● ●
2642 ● ● ● ● ● ● ● ●
2743 ● ● ● ● ● ● ● ●

Chemical Requirement

Steel Grade C % Si % Mn % P % S %
Steel
Name		 Steel
Number		 max max max max max
L235 0252 0.16 0.35 1.2 0.03 0.025
L275 0260 0.2 0.4 1.4 0.03 0.025
L355 0419 0.22 0.55 1.6 0.03 0.025

Mechanical Requirement

Steel Name Tensile
Strength
Rm MPa		 Minimum Yield Strength
Re MPa
For Thickness in mm		 Minimum Elongation
A %
（Lo*5.65√So）		 Diameter Of
Mandrel For The
Weld Bend Test
T ≤ 16 T ＞ 16 l t
L235 360 to 500 235 225 25 23 3T
L275 430 to 570 275 265 21 19 4T
L355 500 to 650 355 345 21 19 4T

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