Types of welded steel pipes and International Welded Pipe Standard

Types of Welded Steel Pipes

Welded steel pipes come in various types, including standard welded steel pipes, oxygen-blown steel pipes, wire conduit pipes, galvanized steel pipes, transformer pipes, and electric welded special-shaped pipes. These pipes are widely used in different industries for fluid transportation, structural support, and electrical applications.

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

Nominal Diameter

OD (mm)

Ordinary 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 weight of a welded steel pipe can be calculated using the formula: W(kg/m) = 0.02466 × thickness × (outer diameter - wall thickness). This formula helps engineers and technicians estimate the mass of the pipe for design and material planning purposes.

International Welded Pipe Standard

Welded steel pipes are manufactured according to international standards such as ASTM, ISO, and EN, ensuring quality, consistency, and compatibility across global markets. These standards define specifications for dimensions, tolerances, material properties, and testing methods, making it easier for manufacturers and users to select the right product for their needs.

Metal Welding

Metal welding is a cornerstone of Sheet Metal Fabrication, enabling the creation of strong, permanent joints in components for industries such as automotive, aerospace, construction, and consumer goods. This category covers a variety of welding techniques tailored to different materials and applications:

  1. Common Welding Methods

    • TIG Welding (GTAW): Ideal for thin sheets and non-ferrous metals (e.g., aluminum, stainless steel), offering high precision and clean finishes.

    • MIG Welding (GMAW): Efficient for thicker materials and high-speed production, widely used in automotive manufacturing.

    • Spot Welding: A resistance welding technique perfect for overlapping sheet metal joints in electronics and appliances.

    • Laser Welding: Delivers ultra-precise, low-heat input seams for critical applications in aerospace and medical devices.

  2. Material Considerations
    Welding parameters vary based on material properties. For example, aluminum requires AC TIG welding to break oxide layers, while steel often uses MIG for versatility.

  3. Quality & Safety
    Emphasizes adherence to standards (e.g., AWS, ISO), joint preparation, and safety protocols (ventilation, PPE) to prevent defects like porosity or warping.

  4. Innovations
    Emerging trends include robotic automation for consistency and hybrid methods (e.g., laser-arc welding) to enhance efficiency in complex projects.

Whether you're crafting structural components or intricate assemblies, understanding metal welding ensures reliable, high-performance results in sheet metal fabrication.

Metal welding, TIG welding, MIG welding, arc welding, laser welding, spot welding, sheet metal joining, welding processes, steel welding, aluminum welding, welding safety, industrial welding, automotive welding, aerospace welding.

Dongguan Shangen Precision Metal Plate Co., Ltd. , https://www.shangenmetal.com

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