EN 10255 pipe dimensions define the nominal sizes, outside diameters, wall thicknesses, and unit weights of non-alloy steel tubes commonly used for water, gas, and other general-purpose piping systems.
This guide provides detailed EN 10255 steel pipe dimension tables covering Light, Medium, and Heavy series, helping buyers and engineers compare specifications and select suitable pipes for their projects.
EN 10255 Steel Pipe Dimensions
|
Specified
outside
diametera
(mm)
|
Thread
Sizea
R
|
Outside
max.
(mm)
|
diameter
min.
(mm)
|
H
Wall
thickness
T
(mm)
|
H
eavy serie
Mass
length o
Plain
end
(kg/m)
|
s
per unit
f bare tube
Socketed
(kg/m)
|
Me
Wall
thickness
T
(mm)
|
M
dium seri
Mass
length o
Plain
end
(kg/m)
|
es
per unit
f bare tube
Threaded
and
socketed
(kg/m)
|
|
102
|
1/8
|
10,6
|
98
|
26
|
487
|
490
|
20
|
404
|
407
|
|
135
|
1/4
|
14,0
|
132
|
29
|
765
|
769
|
23
|
641
|
645
|
|
172
|
3/8
|
17,5
|
167
|
29
|
102
|
103
|
23
|
839
|
845
|
|
213
|
1/2
|
218
|
210
|
32
|
144
|
145
|
26
|
121
|
122
|
|
269
|
3/4
|
27,3
|
265
|
32
|
187
|
188
|
26
|
156
|
157
|
|
337
|
1
|
342
|
333
|
40
|
293
|
295
|
32
|
241
|
243
|
|
424
|
11/4
|
42,9
|
420
|
40
|
379
|
382
|
32
|
310
|
313
|
|
483
|
11/2
|
488
|
479
|
40
|
437
|
441
|
32
|
356
|
360
|
|
603
|
2
|
60,8
|
597
|
45
|
619
|
626
|
36
|
503
|
510
|
|
761
|
21/2
|
766
|
753
|
45
|
793
|
805
|
36
|
642
|
654
|
|
889
|
3
|
89,5
|
880
|
50
|
103
|
105
|
40
|
836
|
853
|
|
1,143
|
4
|
1,150
|
1,131
|
54
|
145
|
148
|
45
|
122
|
125
|
|
1,397
|
5
|
1,408
|
1,385
|
54
|
179
|
184
|
50
|
166
|
171
|
|
1,651
|
6
|
1,665
|
1,639
|
54
|
213
|
219
|
50
|
198
|
204
|
|
a For relationship between specified outside diameter (D), thread size (R) and nominal diameter (DN),see Annex A.
T = specified wall thickness.
|
Steel Pipe Dimensions and Mass Table
|
Specified Outside Diameter D (mm)
|
Thread Size R
|
Outside Diameter Max. (mm)
|
Outside Diameter Min. (mm)
|
H - Heavy Series Wall Thickness T (mm)
|
H - Plain End (kg/m)
|
H - Socketed (kg/m)
|
M - Medium Series Wall Thickness T (mm)
|
M - Plain End (kg/m)
|
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
|
14.0
|
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
|
21.0
|
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
|
42.0
|
4.0
|
3.79
|
3.82
|
3.2
|
3.10
|
3.13
|
|
48.3
|
1 1/2
|
48.8
|
47.9
|
4.0
|
4.37
|
4.41
|
3.2
|
3.56
|
3.60
|
|
60.3
|
2
|
60.8
|
59.7
|
4.5
|
6.19
|
6.26
|
3.6
|
5.03
|
5.10
|
|
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
|
88.0
|
5.0
|
10.3
|
10.5
|
4.0
|
8.36
|
8.53
|
|
114.3
|
4
|
115.0
|
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
|
Notes:
D = Specified outside diameter.
R = Thread size.
T = Specified wall thickness.
H = Heavy series.
M = Medium series.
For the relationship between specified outside diameter (D), thread size (R), and nominal diameter (DN), see Annex A.
|
Nominal Bore
|
Outside Diameter
|
Thickness
|
Weight
|
|
Light
|
Medium/
Heavy
|
Light
|
Medium
|
Heavy
|
Light
|
Medium
|
Heavy
|
|
in
|
mm
|
mm
|
mm
|
mm
|
mm
|
mm
|
kg/m
|
kg/m
|
kg/m
|
|
1/4
|
8
|
13.6
|
13.9
|
1.80
|
2.3
|
2.9
|
0.515
|
0.641
|
0.765
|
|
3/8
|
10
|
17.1
|
17.4
|
1.80
|
2.3
|
2.9
|
0.670
|
0.839
|
1.020
|
|
1/2
|
15
|
21.4
|
21.7
|
2.00
|
2.6
|
3.2
|
0.947
|
1.210
|
1.440
|
|
3/4
|
20
|
26.9
|
27.2
|
2.30
|
2.6
|
3.2
|
1.380
|
1.560
|
1.870
|
|
1
|
25
|
33.8
|
34.2
|
2.60
|
3.2
|
4.0
|
1.980
|
2.410
|
2.940
|
|
1 1/4
|
32
|
42.5
|
42.9
|
2.60
|
3.2
|
4.0
|
2.540
|
3.100
|
3.800
|
|
1 1/2
|
40
|
48.4
|
48.8
|
2.90
|
3.2
|
4.0
|
3.230
|
3.570
|
4.380
|
|
2
|
50
|
60.2
|
60.8
|
2.90
|
3.6
|
4.5
|
4.080
|
5.030
|
6.190
|
|
2 1/2
|
65
|
76.0
|
76.6
|
3.20
|
3.6
|
4.5
|
5.710
|
6.430
|
7.930
|
|
3
|
80
|
88.7
|
89.5
|
3.20
|
4.0
|
5.0
|
6.720
|
8.370
|
10.300
|
|
4
|
100
|
113.9
|
114.9
|
3.60
|
4.5
|
5.4
|
9.750
|
12.200
|
14.500
|
|
5
|
125
|
–
|
140.6
|
–
|
5.0
|
5.4
|
–
|
16.600
|
17.900
|
|
6
|
150
|
–
|
165.1
|
–
|
5.0
|
5.4
|
–
|
19.700
|
21.300
|
Conclusion
Understanding EN 10255 pipe dimensions is essential when selecting steel pipes for different installation and operating requirements. The dimension tables provide a practical reference for comparing nominal bore, outside diameter, wall thickness, and weight across Light, Medium, and Heavy series. Before placing an order, buyers should confirm the required pipe series, dimensions, threading, and end connections to ensure compatibility with the intended piping system.
FAQ
1. What are EN 10255 pipe dimensions?
EN 10255 pipe dimensions specify the nominal bore, outside diameter, wall thickness, and weight of non-alloy steel tubes.
2. What are the main EN 10255 pipe series?
The standard covers Light, Medium, and Heavy series, which differ mainly in wall thickness and weight.
3. What is the difference between EN 10255 Medium and Heavy pipes?
Heavy series pipes generally have thicker walls and higher unit weights than Medium series pipes of comparable nominal sizes.
4. Are EN 10255 pipe dimensions available in different nominal sizes?
Yes. The provided tables cover a range of nominal sizes, from small-bore pipes to larger sizes up to 6 inches.
5. What information should be confirmed when ordering EN 10255 steel pipes?
Buyers should confirm nominal size, outside diameter, wall thickness, pipe series, required length, and end connection requirements.
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