Double seam welded pipe is a type of high-quality steel pipe that has gained a lot of popularity in a variety of businesses due to its exceptional strength, durability, and adaptability. This technique for making pipes includes welding within and beyond a crease of a line at the same time or rapidly. A sturdy and dependable product is the end result. Oil and gas transmission, water transportation, development, and a variety of other applications requiring elite execution channeling frameworks typically make use of double-crease welded pipes. In this comprehensive article, we will investigate the intricacies of producing, including the plate formation procedure, welding techniques, and various seam welding techniques utilized in the industry.
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Plate Formation:
The formation of twofold wrinkle welded pipes starts with the wary decision of incredible steel plates or twists. When selecting these raw materials, the particular requirements of the finished product, such as toughness, strength, and corrosion resistance, are taken into consideration. The steel that is used to make pipes is typically high-strength, low-compound steel that has the right balance of mechanical properties and weldability.
While the fitting steel material is picked, it goes through a movement of status steps. Accuracy slicing gear is utilized to initially cut the steel plates or curls to the vital aspects. This step is vital in light of the fact that it ensures that the completed line will be the right length and measurement. From that point forward, the cut edges are painstakingly analyzed and, if fundamental, machined to ensure that they are straight and liberated from blemishes that could impede the welding system.
The next step is to shape the flat steel plate into a cylinder. This connection, known as plate rolling, is regularly done using colossal water driven presses or moving machines. By gradually bending the plate into a U shape and then further forming it into an O shape, the basic cylinder shape of the pipe is created. The last line's roundness and straightness are straightforwardly affected by the accuracy of this framing system.
One of the most crucial steps in the plate formation process is the preparation of the edges that will form the pipe seam. The inside and outside edges of the plate are meticulously machined to form a specific joint configuration when making double seam welded pipes. An Angular notch is the most widely recognized joint groundwork for twofold crease welding.
Welding Process:
The welding process is the heart of double seam welded pipe production, and it is here that the unique characteristics of this manufacturing method become apparent. Double seam welding involves welding both the inside and outside of the pipe seam, either simultaneously or in rapid succession, to create a strong, uniform, and fully penetrated weld.
The most common welding technique used for double seam welded pipes is submerged arc welding (SAW). This process is particularly well-suited for high-productivity welding of thick materials, making it ideal for pipe production. In submerged arc welding, the welding arc is completely covered by a layer of granular flux, which provides several benefits:
1. Protection from atmospheric contamination: The flux melts to form a protective slag over the weld pool, preventing oxidation and nitrogen absorption.
2. Arc stabilization: The flux helps to stabilize the welding arc, allowing for smoother and more consistent welding.
3. Improved weld quality: The flux can contribute alloying elements to the weld metal, enhancing its mechanical properties.
4. Increased productivity: The flux allows for the use of higher welding currents, resulting in higher deposition rates and faster welding speeds.
Types of Welding:
1.Longitudinal Seam Welding: This is done when the weld runs along the length of the pipe. The steel plate is rolled and welded along its length to form a continuous pipe.
2.Circumferential Seam Welding: This type of welding is done around the circumference of the pipe, often used in spiral welded pipes where the plate is rolled at an angle to the pipe's length, creating a spiral seam.
Double seam welded pipes can be produced using two main types of welding configurations: longitudinal seam welding and circumferential seam welding. Each of these methods has its own characteristics and is suited to different applications.
Longitudinal Seam Welding is the most common method used in the production of double seam welded pipes. In this process, the weld runs parallel to the length of the pipe. The production sequence for longitudinal seam welded pipes typically follows these steps:
1. The steel plate or coil is cut to the required width, which corresponds to the circumference of the finished pipe.
2. The plate edges are prepared with the appropriate groove configuration.
3. The plate is then formed into a cylindrical shape using plate rolling machines.
4. The edges of the formed cylinder are brought together to create a straight seam along the length of the pipe.
5. The seam is then welded from both the inside and outside using the double seam welding process.
Longitudinal seam welded pipes offer several advantages:
1. They can be produced in long continuous lengths, reducing the number of circumferential welds required during pipeline construction.
2. The welding process is highly automated, allowing for consistent weld quality along the entire length of the pipe.
3. They are well-suited for pipes with larger diameters and thicker walls.
4. The straight seam allows for easier inspection and testing of the weld.
Circumferential Seam Welding, also known as spiral or helical seam welding, is an alternative method used in pipe production. In this process, the steel strip is formed into a spiral shape, creating a helical seam that wraps around the pipe at an angle to its length. The production process for spiral welded pipes involves the following steps:
1. A continuous steel strip is fed into a spiral forming machine at an angle.
2. The strip is gradually formed into a cylindrical shape, with the edges meeting to form a spiral seam.
3. The seam is welded continuously as the pipe is formed, using the double seam welding process to weld both the inside and outside of the seam.
Spiral welded pipes offer some unique advantages:
1. They can be produced using narrower steel strips, which can be more readily available and potentially more cost-effective.
2. The spiral seam provides additional structural strength to the pipe, potentially allowing for the use of thinner wall thicknesses in some applications.
3. The production process is continuous, allowing for the manufacture of very long pipe sections.
4. The spiral seam can provide better resistance to longitudinal stresses compared to straight seam pipes.
Both longitudinal and spiral seam welded pipes have their place in various applications, and the choice between them often depends on factors such as the specific project requirements, material availability, and cost considerations.
Double Seam Welded Pipe supplier:
When it comes to sourcing high-quality Double Seam Welded pipes, choosing a reliable and experienced supplier is crucial. One such supplier is the Longma Group, which offers a comprehensive range of Double Seam Welded pipes designed to meet the demanding requirements of various industries, including oil and gas, construction, and water transportation.
The Longma Group supplies Double Seam Welded Pipes with a wide range of dimensions to suit various project needs. Their product line includes pipes with outer diameters ranging from 1/2 inch to 72 inches, catering to both small-diameter and large-diameter applications. This versatility allows customers to source pipes for various parts of their pipeline systems, from gathering lines to main transmission pipelines, from a single supplier.
For project managers, engineers, or procurement specialists looking to source Double Seam Welded pipes for their projects, the Longma Group offers expert assistance in selecting the right products. They can be contacted at info@longma-group.com for detailed information about their product range, specifications, and how their pipes might meet specific project requirements.
