AS 1074 specifies the dimensional standards for steel pipes ranging from DN 8 to DN 150, and classifies them into three categories based on wall thickness: light, medium, and heavy. The pipe dimensions and mass values conform to the specifications outlined in ISO 65. This article will introduce the dimensions and tests of AS 1074 steel pipes.
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AS 1074 Light Steel Pipe Dimensions
|
Nominal size
|
Outside diameter, mm
|
Thickness, mm
|
Mass of black tube, kg/m
|
|
min
|
max
|
Plain or screwed ends
|
Screwed and socketed
|
|
DN 8
|
13.2
|
13.6
|
1.8
|
0.515
|
0.519
|
|
DN 10
|
16.7
|
17.1
|
1.8
|
0.670
|
0.676
|
|
DN 15
|
21.0
|
21.4
|
2.0
|
0.947
|
0.956
|
|
DN 20
|
26.4
|
26.9
|
2.3
|
1.38
|
1.39
|
|
DN 25
|
33.2
|
33.8
|
2.6
|
1.98
|
2.00
|
|
DN 32
|
41.9
|
42.5
|
2.6
|
2.54
|
2.57
|
|
DN 40
|
47.8
|
48.4
|
2.9
|
3.23
|
3.27
|
|
DN 50
|
59.6
|
60.2
|
2.9
|
4.08
|
4.15
|
|
DN 65
|
75.2
|
76.0
|
3.2
|
5.71
|
5.83
|
|
DN 80
|
87.9
|
88.7
|
3.2
|
6.72
|
6.89
|
|
DN 100
|
113.0
|
113.9
|
3.6
|
9.75
|
10.0
|
AS 1074 Medium Steel Pipe Dimensions
|
Nominal size
|
Outside diameter, mm
|
Thickness, mm
|
Mass of black tube, kg/m
|
|
min
|
max
|
Plain or screwed ends
|
Screwed and socketed
|
|
DN 8
|
13.3
|
13.9
|
2.3
|
0.641
|
0.645
|
|
DN 10
|
16.8
|
17.4
|
2.3
|
0.839
|
0.845
|
|
DN 15
|
21.1
|
21.7
|
2.6
|
1.21
|
1.22
|
|
DN 20
|
26.6
|
27.2
|
2.6
|
1.56
|
1.57
|
|
DN 25
|
33.4
|
34.2
|
3.2
|
2.41
|
2.43
|
|
DN 32
|
42.1
|
42.9
|
3.2
|
3.10
|
3.13
|
|
DN 40
|
48.0
|
48.8
|
3.2
|
3.57
|
3.61
|
|
DN 50
|
59.8
|
60.8
|
3.6
|
5.03
|
5.10
|
|
DN 65
|
75.4
|
76.6
|
3.6
|
6.43
|
6.55
|
|
DN 80
|
88.1
|
89.5
|
4.0
|
8.37
|
8.54
|
|
DN 100
|
113.3
|
114.9
|
4.5
|
12.2
|
12.5
|
|
DN 125
|
138.7
|
140.6
|
5.0
|
16.6
|
17.1
|
|
DN 150
|
164.1
|
166.1
|
5.0
|
19.7
|
20.3
|
AS 1074 Heavy Steel Pipe Dimensions
|
Nominal size
|
Outside diameter, mm
|
Thickness, mm
|
Mass of black tube, kg/m
|
|
min
|
max
|
Plain or screwed ends
|
Screwed and socketed
|
|
DN 8
|
13.3
|
13.9
|
2.9
|
0.765
|
0.769
|
|
DN 10
|
16.8
|
17.4
|
2.9
|
1.02
|
1.03
|
|
DN 15
|
21.1
|
21.7
|
3.2
|
1.44
|
1.45
|
|
DN 20
|
26.6
|
27.2
|
3.2
|
1.87
|
1.88
|
|
DN 25
|
33.4
|
34.2
|
4.0
|
2.94
|
2.96
|
|
DN 32
|
42.1
|
42.9
|
4.0
|
3.80
|
3.83
|
|
DN 40
|
48.0
|
48.8
|
4.0
|
4.38
|
4.42
|
|
DN 50
|
59.8
|
60.8
|
4.5
|
6.19
|
6.26
|
|
DN 65
|
75.4
|
76.6
|
4.5
|
7.93
|
8.05
|
|
DN 80
|
88.1
|
89.5
|
5.0
|
10.3
|
10.5
|
|
DN 100
|
113.3
|
114.9
|
5.4
|
14.5
|
14.8
|
|
DN 125
|
138.7
|
140.6
|
5.4
|
17.9
|
18.4
|
|
DN 150
|
164.1
|
166.1
|
5.4
|
21.3
|
21.9
|
Dimensional Tolerance of AS 1074 Steel Pipes
|
Thickness
|
Light welded tubes
|
-8 %
|
|
Medium and heavy welded tubes
|
-10 %
|
|
Medium and heavy Seamless tubes
|
-12.5 %
|
|
Outside diameter
|
See steel pipe dimensions
|
|
Mass
|
total length ≥ 150 m
|
±4 %
|
|
One steel pipe
|
-8 % – +10 %
|
|
lengths
|
Standard lengths
|
6.50 ±0.08 m
|
|
Exact lengths
|
0 – +8 mm
|
Hydrostatic Test and Non-destructive Test of AS 1074 Steel Pipes
1. Hydrostatic Test
A hydrostatic pressure of 5 MPa shall be applied and maintained for a sufficient duration to confirm the integrity of the pipe. No leakage is permitted during the test.
2. Non-Destructive Testing (NDT)
Eddy Current Testing (ET) shall be performed in accordance with AS 2084, suitable for detecting surface and near-surface defects.
Ultrasonic Testing (UT) shall be conducted in accordance with Appendix C of AS 1074. This method is particularly applicable for weld seam inspection in Electric Resistance Welded (ERW) steel pipes manufactured under AS 1074.
Color Marking of AS 1074 Steel Pipes
|
Tube
|
Color
|
|
Light tube
|
Brown
|
|
Medium tube
|
Blue
|
|
Heavy tube
|
Red
|
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