LSAW steel pipes lubricantion,longitudinal submerged arc welded pipe lubricantion

Why use lubricants when making LSAW steel pipes?

Date:2024-09-10

Lubricants are essential in the production of longitudinal submerged arc welded (LSAW) steel pipes for several important reasons.

 

1. Reduction of Friction:

During the LSAW pipe manufacturing process, steel sheets or plates are bent and welded into a cylindrical shape. Lubricants are applied to reduce friction between the forming tools and the steel material, which helps to maintain smooth operations and prevents wear on the equipment. Lower friction levels result in less resistance during bending and shaping, improving the overall efficiency of the process.

 

2. Protection of Equipment:

Manufacturing LSAW pipes involves high-pressure and high-temperature processes, which can lead to wear and tear on machinery components such as rollers, dies, and welding tools. Lubricants help to create a protective layer between the steel and the equipment, reducing mechanical wear and extending the life of the manufacturing tools.

 

3. Improved Surface Quality:

Lubricants help prevent surface defects like scratches, gouges, or other imperfections that can occur during the bending and welding processes. By minimizing direct metal-to-metal contact, they ensure a smoother surface finish on the pipe, which is critical for applications where the pipe’s surface integrity is crucial.

 

4. Temperature Control:

During the welding and forming process, high heat is generated, particularly in the arc welding stage. Lubricants help dissipate some of this heat, preventing excessive temperature buildup that could distort the steel or affect the weld quality.

 

5. Ease of Forming:

When shaping steel plates into pipes, lubricants facilitate smoother bending and forming, ensuring that the steel maintains its desired shape without deforming or cracking. This is particularly important in LSAW pipes, where the large diameter requires precision in forming to maintain uniformity.

 

6. Preventing Metal Seizure:

During welding, metal surfaces come into contact under intense pressure and heat. Without adequate lubrication, metal surfaces can seize or weld together unintentionally. Lubricants prevent this from happening by creating a barrier between the surfaces, allowing for smoother operations.

 

7. Weld Quality:

Lubricants can indirectly improve weld quality by ensuring that the steel moves consistently through the welding process without deformation or irregularities. Consistent movement helps to produce uniform and defect-free welds, which are critical to the strength and integrity of the LSAW pipe.

 

In summary, lubricants play a key role in reducing friction, protecting equipment, ensuring surface quality, controlling temperature, aiding in the forming process, and preventing metal defects during the production of LSAW steel pipes.

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