Carbon steel ERW black steel pipe

What is black steel pipe?
Black steel pipe is a type of steel pipe commonly used in commercial and residential plumbing projects. It is made of hot-rolled or cold-rolled steel and is blackened to better resist corrosion and rust. The main advantage of black steel pipe is its superior strength compared to other types of pipes. This makes it highly resistant to bending, cracking or breaking even under extreme pressure or weight.

What is carbon steel ERW black steel pipe?

Carbon Steel ERW Black Steel Pipe is a welded pipe made of carbon steel black pipe as raw material through the resistance welding process. High-frequency resistance welding is a technology used to connect metal pipes and other metal parts. It usually uses high-frequency current to heat both ends of the pipe to the melting temperature and connect them in a molten state. Black steel pipe is a steel pipe that is not galvanized or painted, and is usually used to transport gas and liquid. Therefore, black steel pipe high-frequency resistance welding refers to the process of connecting untreated black steel pipes using high-frequency resistance welding technology.

Welding principle of carbon steel ERW black steel pipe:
High frequency welding uses the principle of electromagnetic induction and the skin effect, proximity effect and eddy current thermal effect of the AC charge in the conductor to locally heat the steel at the edge of the weld to a molten state. After roller extrusion, the butt weld is intercrystalline. Combined to achieve the purpose of welding. High frequency welding is a type of induction welding (or pressure contact welding). No weld filler is required, no welding spatter, narrow welding heat affected zone, beautiful welding shape, and good welding mechanical properties. Therefore, it is favored in steel pipe production. Wide range of applications.

High frequency welding of ERW black steel pipe utilizes the skin effect and proximity effect of alternating current. After the steel (strip) is rolled and formed, a tube blank with a circular cross section is formed, which is located close to the center of the induction coil in the tube blank. Rotate one or a group of resistors (magnetic bars) nearby, and the resistors and the opening of the tube blank form an electromagnetic induction loop. Under the action of skin effect and proximity effect, a strong and concentrated heat effect is generated at the edge of the tube blank opening, so that the weld edge is quickly heated to the temperature required for welding, and is squeezed by the rollers. After the molten metal cools, intergranular bonding is achieved and a strong butt weld is formed.

What are the advantages and disadvantages of using carbon steel ERW black steel pipe?

Advantages of ERW black steel pipe:
The main advantage of ERW black steel pipe is its strength. This makes it very durable and able to withstand higher pressures than other types of pipes. Black steel pipe is also very cost-effective and available in a variety of sizes, so it is easy to find the right pipe for any job. In addition, because the black coating helps reduce rust and corrosion, it is generally considered the best choice for use outdoors or in humid environments.

Disadvantages of ERW black steel pipe:
While ERW black steel pipe has several advantages, there are also some disadvantages to consider before deciding whether to use it. First, the black coating may wear off if it is frequently worn or exposed to other elements. This makes the pipe susceptible to further corrosion or rust. In addition, while the strength of black steel pipe makes it attractive for many applications, it is not very suitable for applications that require flexibility, such as some types of gas pipes. Finally, black steel pipes are not compatible with all types of fittings, so consult a local expert before purchasing.

Applications of carbon steel ERW black steel pipes:

1. Construction Industry
ERW black steel pipes are used for building structures, support poles, and pressure transmission pipelines, such as large roof frames, support structures for high-rise buildings, rainwater, sewage, and gas pipelines in municipal road construction, etc.

2. Petrochemical Industry.
ERW black steel pipes are widely used in oil refining, chemical production, and other fields because of their high corrosion resistance, which can reduce the loss of chemicals and improve industrial production efficiency.

3. Energy Industry.
ERW black steel pipes play an important role in oil and gas transportation, hydropower stations, nuclear power plants, and other fields because they can withstand high pressure, high temperature, and corrosive environments to ensure the safe transportation of oil and gas.

Carbon steel ERW black steel pipes are a popular choice for many different industrial and commercial piping applications. It is very durable, corrosion-resistant and rust-resistant, and provides a long-lasting solution. However, before deciding whether to use black steel pipes in your project, it is important to consider the pros and cons discussed in this article.

What is the difference between seamless mechanical tubing and structural tubing?

Seamless mechanical tubing is produced to tight tolerances and specifications and requires greater precision than structural tubing. Mechanical tubing can be seamless or have welded seams. Seamless mechanical tubing helps avoid weak links in assemblies.

Read more: Carbon steel tube material and use or Carbon steel ERW pipe specification