Types of Welded Steel Pipes

Welded steel pipes come in various types, including standard welded steel pipes, oxygen-blowing steel pipes, casing pipes for wires, galvanized steel pipes, transformer pipes, and electric welded special-shaped pipes. These pipes are commonly used in different industries such as construction, oil and gas, and plumbing due to their durability and cost-effectiveness.

Dimensions and Weights of Low-Pressure Fluid Conveyance Welded Steel Pipes

The following table provides the dimensions and theoretical weights of both standard and thickened welded steel pipes for low-pressure fluid transfer:

Nominal Diameter

OD (mm)

Standard Tube

Thickened Tube

(mm)

(in)

Wall Thickness (mm)

Theoretical Weight (kg/m)

Wall Thickness (mm)

Theoretical Weight (kg/m)

6

1/8

10.00

2.00

0.39

2.50

0.46

8

1/4

13.50

2.25

0.62

2.75

0.73

10

3/8

17.00

2.25

0.82

2.75

0.97

15

1/2

21.25

2.75

1.26

3.25

1.45

20

3/4

26.75

2.75

1.63

3.50

2.01

25

1

33.50

3.25

2.42

4.00

2.91

32

1 1/4

42.25

3.25

3.13

4.00

3.78

40

1 1/2

48.00

3.50

3.84

4.25

4.58

50

2

60.00

3.50

4.88

4.50

6.16

65

2 1/2

75.50

3.75

6.64

4.50

7.88

80

3

88.50

4.00

8.34

4.75

9.81

100

4

114.00

4.00

10.85

5.00

13.44

125

5

140.00

4.00

13.42

5.50

18.24

150

6

165.00

4.50

17.81

5.50

21.63

The theoretical weight of a welded steel pipe can be calculated using the formula: W(kg/m) = 0.02466 × thickness × (outer diameter - wall thickness).

International Standards for Welded Pipes

Welded steel pipes are manufactured according to international standards that ensure quality, consistency, and compatibility across global markets. Common standards include ASTM A53, API 5L, and EN 10217. These standards specify requirements for material composition, dimensional tolerances, pressure ratings, and testing procedures to guarantee safe and reliable performance in various applications.

Whether you're working on a residential project or an industrial system, understanding the specifications and standards of welded steel pipes is essential for selecting the right product for your needs.

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