What does Sch 40 seamless pipe mean?
Sch 40 seamless pipe refers to a specific type of steel pipe with a wall thickness of 40, which has no seams or welds during its manufacturing process. "
Sch 40" means standard wall thickness, and this type of pipe is usually used in applications that require medium pressure resistance and high temperature resistance.
What is seamless steel pipe?
Seamless steel pipe (SMLS) is a steel pipe made by processes such as billet heating, piercing, rolling and cooling. Compared with welded steel pipe, seamless steel pipe has obvious advantages in appearance and performance. First, it has a smooth appearance and no welded joints, so it has better aesthetics. Secondly, due to the lack of welds, seamless steel pipes excel in strength and pressure resistance and can withstand higher pressures and temperatures. This makes seamless steel pipes widely used in some special fields, such as petroleum, chemical, natural gas and other industries.
SCH 40 pipe specification identification:
SCH is the abbreviation of Schedule, and Pipe Schedule refers to the wall thickness grade of American standard
ANSI/ASME B36.10 steel pipe. The wall thickness of different pipe diameters is different. Common wall thickness grades include SCH20, SCH40, SCH80, SCH160, etc. As the number increases, the thicker the pipe wall. SCH 40 is a medium wall thickness, thicker than SCH 20 and thinner than SCH 80. It is suitable for occasions with higher pressure and temperature and is often used for medium-pressure fluid transportation. Seamless steel pipes of this specification are widely used in industries such as petroleum, chemical industry, shipbuilding, heating, etc.
Characteristics of SCH 40 seamless pipe:
1. High strength: The wall thickness of Sch40 pipe is relatively large and can withstand higher pressure and mechanical load.
2. High pressure resistance: Suitable for high-pressure environments such as boilers and hydraulic systems.
3. Strong corrosion resistance: Seamless steel pipes are usually made of high-quality steel and can operate stably for a long time in harsh environments.
4. High dimensional accuracy: The production process of seamless steel pipe Sch40 is relatively precise and has high dimensional accuracy. It is suitable for occasions with strict dimensional requirements.
5. High cost: More expensive than
welded pipes and difficult to process.
6. Wide application: Seamless steel pipe Sch40 is widely used in the fields of petroleum, chemical industry, heating, shipbuilding, etc., for conveying various media such as liquids, gases and solids.
Advantages of SCH 40 seamless pipe:
1. Higher safety: no welds, avoiding the risk of cracking, suitable for high pressure and high temperature environment.
2. Better fluid performance: smooth inner wall, reducing fluid resistance, suitable for chemical and petroleum transportation.
3. Longer service life: corrosion resistance, wear resistance, low maintenance cost.
4. Wide applicability: can be processed into mechanical parts, hydraulic cylinders, boiler pipes, etc.
Pipes schedule 40 chart gives dimensions of steel pipes schedule 40. The chart includes sizes in inches and in millimeters.
|
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
|
Typical applications:
Oil & Natural Gas: oil well pipes, oil pipelines, high-pressure gas transportation.
Chemical industry: transportation of corrosive media such as acids, alkalis, solvents, etc.
Electricity & Boilers: high-temperature and high-pressure steam pipelines, heat exchangers.
Mechanical manufacturing: hydraulic cylinders, bearing tubes, precision instrument components.
Automobile & Aviation: high-strength structural parts, transmission shafts.
Conclusion:
Sch 40 seamless pipe is a seamless steel pipe specification with high strength and high pressure resistance. It plays an important role in the petroleum, chemical, shipbuilding, heating and other industries. The use of seamless steel pipe Sch 40 can ensure the stable operation of the pipeline and meet the requirements of various media transportation. Compared with welded pipes, it has better pressure bearing capacity and safety, but the cost is higher. When purchasing, you need to pay attention to the material, standard and applicable environment.
Read more: Schedule 80 Carbon Steel Pipe Thickness
