Mild carbon steel black welded steel pipe

Mild carbon steel black welded steel pipe is a steel pipe made of mild carbon steel, its surface is black, is the result of the natural iron oxide layer formed during the manufacturing process. This pipe is widely used in many industries due to its low cost, high durability, and suitable for low pressure and non-corrosive environments.

Mild carbon steel black welded steel pipe features

Materials:

The use of ordinary carbon steel (mild carbon steel) manufacturing, carbon content is usually less than 0.25%, with good weldability and plasticity.

Surface characteristics:

The surface is black, which is a prominent feature of the mild carbon steel black pipe, and the dark color of the pipe comes from the iron oxide layer formed during the production process. Non-galvanized steel pipe, no zinc coating.

Manufacturing process:

It is formed by rolling a steel plate or strip into a round shape and welding it along the longitudinal path. Compared with seamless steel pipes, welded steel pipes are usually more productive and produce more quantities per unit time.

Cost:

Mild carbon steel black pipe is one of the cheapest metal pipes on the market and costs less than galvanized steel pipe or seamless steel pipe. Suitable for applications where strength and corrosion resistance are not required.

Application field

Water and gas transport:
A piping system used to transport water, gases and other fluids at low pressure.

Structural use:
Used for structural support in buildings, such as scaffolding and frame supports. Its strength and durability make it a reliable choice for these critical components.

Industrial use:
Widely used in manufacturing, irrigation systems and civil engineering projects, it is valued for its robust construction and cost effectiveness.

Non-corrosive environment:
Suitable for indoor use or environment without contact with corrosive substances.

Technical specification

Material composition:

Carbon (C) : ≤ 0.25%
Manganese (Mn) : ≤ 1.65%
Phosphorus (P) : ≤ 0.05%
Sulfur (S) : ≤ 0.05%

Mechanical properties:

Yield strength: 210-275 MPa (depending on grade and wall thickness)
Tensile strength: 330-430 MPa
Elongation: ≥ 20% (depending on wall thickness and pipe grade)

Implementation standards:

Common production standards include ASTM A53, IS 1239, or EN 10219.

Size range:

Outer diameter: Common range from 1/2" to 36".
Wall thickness: from standard wall thickness (Sch 40) to thick wall (Sch 80).

Advantage

Economical benefits:
Lower production costs make it suitable for projects with limited budgets.

Easy welding:
Ordinary carbon steel is easy to weld without special equipment or tools.

Widely used:
Suitable for a wide range of specifications and applications.

Strong durability:
Performs well in non-corrosive or slightly corrosive environments.

Limitation

Corrosion problem:
Because there is no galvanized protective layer, easy to rust; Additional anti-corrosion treatment is required.

Strength limit:
Not applicable to scenarios with high pressure or high intensity requirements.

Temperature limit:
Performance may deteriorate at extremely high temperatures.

Maintenance and treatment

Coating and spray painting:
The service life can be extended by painting or coating with anti-corrosion coating.

Regular inspection:
Check pipes regularly for signs of rust or wear, especially if they are exposed to moisture or corrosion.

Storage requirements:
Store in a dry environment to avoid moisture and high humidity. Such as extreme temperatures or chemicals.

Mild carbon steel black welded steel pipe is an economical solution in low pressure and structural applications, combined with appropriate maintenance measures, in the right environment can significantly extend the service life.

Read more:  Classification and characteristics of mild steel black pipes