Straight seam steel pipe is a common steel pipe in daily life, and it is widely used. The production process of straight seam steel pipes can be divided into two categories, high-frequency straight seam steel pipes and submerged arc welded straight seam steel pipes. These two production processes are different. Next, let’s take a look at the production processes of these two types of straight seam steel pipes.

1. Submerged arc welding

After the steel plate for manufacturing large-diameter submerged arc welded straight seam steel pipes is put into the production line. First, the entire plate is ultrasonically inspected, and then the two edge faces of the steel plate are milled on both sides with a milling machine. Make the two edge surfaces of the steel plate reach the required plate width, edge parallelism and groove shape, and then use the pre-supplier's equipment to perform the pre-supplier's edge operation to make the edge of the plate have the required curvature. Then, using a JCO forming machine, half of the pre-bent steel plate is punched into a J shape multiple times. In addition, the other half of the stepped punching operation is punched into a C shape, which becomes an O shape with the last opening.

Align the formed longitudinally welded steel pipes and use gas shielded arc welding for continuous welding, and longitudinal multi-wire submerged arc welding is used for internal welding of longitudinally welded steel pipes. Longitudinal multi-wire submerged arc welding is used to weld the outside of longitudinal submerged arc welded steel pipes. After the welding is completed, the first ultrasonic inspection, the first X-ray inspection, diameter expansion and hydraulic test are carried out in sequence.

Then, the qualified steel pipe is processed into the required size, followed by the second ultrasonic inspection, the second X-ray inspection, the tube end magnetic particle inspection, anti-corrosion and coating, and the entire processing procedure is completed.

2. High frequency welding

The high-frequency welding technology is based on the principle of electromagnetic induction, which has the eddy current effect, skin effect and proximity effect of the AC charge in the conductor, and heats the welded edge steel to a molten state. In the rolling process, the butt welding particles can be combined together to achieve the purpose of welding. High-frequency welding is induction welding, also known as pressure welding. High-frequency welding does not require welding fillers, and there is no welding spatter during welding. The welding area affected by the welding heat is narrow, the shape after welding is very beautiful, and the mechanical properties of the welding are very good. It is precisely because of these advantages that high-frequency welding is widely used in steel pipe production.

The high-frequency welding of steel pipes uses alternating current power to roll the steel to form a circular tube blank with a divided cross section. Rotate one or a group of resistors near the center of the induction coil in the tube blank, and an electromagnetic induction circuit is formed at the opening of the resistor and the tube blank. A strong concentrated heat effect is generated at the edge of the tube blank opening, and the welding edge is quickly heated to the point of welding. The desired temperature.

The above are the two production processes of straight seam steel pipes. I hope that these contents can help you better understand the use of straight seam steel pipes.

Are you in the market for high-quality steel pipes for your construction projects? Look no further than straight seam steel pipes. With their durability and strength, these pipes are ideal for a variety of applications, from oil and gas pipelines to structural supports. But did you know that there are two different production processes used to create straight seam steel pipes - LSAW and ERW? In this blog post, we'll explore the differences between these methods and help you choose the best supplier for your needs. Let's dive in!

The Differences Between LSAW and ERW Steel Pipes

LSAW and ERW are two of the most commonly used methods for producing straight seam steel pipes. LSAW stands for Longitudinally Submerged Arc Welded, while ERW stands for Electric Resistance Welded. The main difference between these two methods is the welding procedure.

In LSAW, a large diameter pipe is first formed by bending flat steel plates into a U shape. Then, a submerged arc welding process is used to weld the edges of the U-shaped plate together. This creates a single seam along the length of the pipe.

In contrast, ERW pipes are produced by rolling metal sheets through several sets of rollers to form a cylindrical shape. A high-frequency electrical current is then passed through this cylinder to heat and melt the edges together.

While both methods produce straight seam steel pipes, there are some key differences in their application and capabilities. LSAW tends to be used for larger diameter pipes with thicker walls, while ERW is better suited for smaller diameters and thinner walls.

Choosing between LSAW and ERW will depend on your specific project requirements and budget constraints. It's important to work with an experienced supplier who can help you make an informed decision based on your needs.

The Benefits of Investing In Straight Seam Steel Pipes

Straight seam steel pipes have become an essential component in various industries due to their durability, strength, and versatility. These pipes are manufactured using two production processes, namely LSAW and ERW. Both of these methods produce high-quality straight seam steel pipes that offer numerous benefits to the users.

One of the primary advantages of investing in straight seam steel pipes is their ability to withstand a wide range of temperatures and pressures. They can be used for transporting fluids such as water, oil, gas, and chemicals over long distances without experiencing any significant damage or leakage.

Another benefit is that they are cost-effective compared to other types of pipes such as seamless ones. Straight seam steel pipes are available in large diameters making them ideal for use in construction projects where extensive underground piping networks need installation.

Furthermore, straight seam steel pipes have a smooth surface finish which reduces frictional resistance during fluid transportation leading to lower pumping costs. They also require minimal maintenance making them suitable for applications where continuous operation is necessary.

These types of pipes are eco-friendly since they can be recycled multiple times without losing their mechanical properties or structural integrity. This makes them an excellent option for environmentally conscious companies looking for sustainable solutions.

Investing in straight seam steel pipes offers several benefits including durability, affordability, low maintenance requirements , smooth surface finish reducing pumping costs , large diameter availability suitable for construction projects , recyclability making it eco-friendly among others .

How to Choose the Best Straight Seam Steel Pipe Supplier

When it comes to choosing the best straight seam steel pipe supplier, there are several factors to consider. First and foremost, you need to ensure that the supplier has a good reputation in the industry. Look for reviews and testimonials from previous customers to get an idea of their experience with the supplier.

Another important factor is the quality of their products. Make sure that they use high-quality materials and follow strict manufacturing processes to produce durable and reliable steel pipes.

You should also consider their pricing structure. While it's important to look for competitive prices, don't let price be your only determining factor. Sometimes paying a little extra can mean getting better quality products and customer service.

Customer service is another crucial aspect when choosing a straight seam steel pipe supplier. A good supplier should be responsive, helpful, and willing to go above and beyond for their customers.

Make sure that they have a range of product options available so you can choose what best suits your needs. This includes different sizes, grades of steel, coatings or finishes as well as fittings or accessories needed for installation.

By considering these factors when choosing a straight seam steel pipe supplier, you'll be able to find one that meets your specific requirements while providing excellent value for money.

Conclusion

To sum it up, straight seam steel pipes are a popular choice in various industries due to their durability and strength. LSAW and ERW production processes both have advantages depending on the specific needs of your project.

When choosing a straight seam steel pipe supplier, consider factors such as experience, quality control measures, certifications, and customer service. With the right supplier and type of pipe for your project, you can ensure efficient operations and long-lasting infrastructure.

Investing in high-quality straight seam steel pipes is crucial for any business that relies on them for transportation of fluids or gases. It's essential to work with reputable suppliers who offer reliable products backed by quality assurance programs. By doing so, you'll enjoy peace of mind knowing that you're using top-grade materials in your projects.

Remember always to prioritize safety when working with these heavy-duty pipes by following proper procedures during installation and maintenance.

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