A seamless black steel pipe with Schedule 40 designation refers to the pipe's wall thickness and is a common designation in the pipe industry. Seamless black steel pipes are crafted from ungalvanized steel, earning their name from the dark iron oxide coating on their surface. They find application in situations where galvanized steel is not required.
The inherent strength of black steel pipes makes them well-suited for various purposes, including the conveyance of water and gas in both rural and urban settings. They are also employed as protective conduits for electrical wiring and for the transportation of high-pressure steam and air. The oil and petroleum sectors rely on black steel pipes for the efficient movement of substantial quantities of oil, especially in remote regions. The minimal maintenance needs of black steel pipes offer a significant advantage. Additional uses include gas distribution within and outside residential properties, water well construction, and sewage systems. This article will talk about seamless black steel pipe schedule 40.
Specifications of Seamless Black Steel Pipe Schedule 40:
Nominal size
[inches]
|
Outside diameter
[inches]
|
Outside diameter
[mm]
|
Wall thickness
[inches]
|
Wall thickness
[mm]
|
Weight
[lb/ft]
|
Weight
[kg/m]
|
1/8
|
0.405
|
10.3
|
0.068
|
1.73
|
0.24
|
0.37
|
1/4
|
0.540
|
13.7
|
0.088
|
2.24
|
0.42
|
0.84
|
1/2
|
0.840
|
21.3
|
0.109
|
2.77
|
0.85
|
1.27
|
3/4
|
1.050
|
26.7
|
0.113
|
2.87
|
1.13
|
1.69
|
1
|
1.315
|
33.4
|
0.133
|
3.38
|
1.68
|
2.50
|
1 1/4
|
1.660
|
42.2
|
0.140
|
3.56
|
2.27
|
3.39
|
1 1/2
|
1.900
|
48.3
|
0.145
|
3.68
|
2.72
|
4.05
|
2
|
2.375
|
60.3
|
0.154
|
3.91
|
3.65
|
5.44
|
2 1/2
|
2.875
|
73.0
|
0.203
|
5.16
|
5.79
|
8.63
|
3
|
3.500
|
88.9
|
0.216
|
5.49
|
7.58
|
11.29
|
3 1/2
|
4.000
|
101.6
|
0.226
|
5.74
|
9.11
|
13.57
|
4
|
4.500
|
114.3
|
0.237
|
6.02
|
10.79
|
16.07
|
5
|
5.563
|
141.3
|
0.258
|
6.55
|
14.62
|
21.77
|
6
|
6.625
|
168.3
|
0.280
|
7.11
|
18.97
|
28.26
|
8
|
8.625
|
219.1
|
0.322
|
8.18
|
28.55
|
42.55
|
10
|
10.750
|
273.0
|
0.365
|
9.27
|
40.48
|
60.31
|
12
|
12.750
|
323.8
|
0.406
|
10.31
|
53.52
|
79.73
|
14
|
14
|
355.6
|
0.375
|
11.13
|
54.57
|
94.55
|
16
|
16
|
406.4
|
0.500
|
12.70
|
82.77
|
123.30
|
18
|
18
|
457.0
|
0.562
|
14.27
|
104.67
|
155.80
|
20
|
20
|
508.0
|
0.594
|
15.09
|
123.11
|
183.42
|
24
|
24
|
610.0
|
0.688
|
17.48
|
171.29
|
255.41
|
32
|
32
|
813.0
|
0.688
|
17.48
|
230.08
|
342.91
|
Common Applications of Seamless Black Steel Pipe Schedule 40:
- Water supply
- Plumbing
- HVAC (heating, ventilation, and air conditioning) systems
- Low-pressure fluid transport
- Structural and construction projects
In summary, a seamless black steel pipe with Schedule 40 designation is a medium-thickness pipe that is commonly used for various applications requiring moderate pressure resistance, and it comes in a range of sizes to suit different needs in industries such as plumbing, construction, and fluid transport.