Welded pipe types refer to various types of pipes that are created by welding two or more pieces of metal together. Welded pipes are commonly used in a wide range of industries, including oil and gas, construction, and manufacturing. In this article, we will explore the different types of welded pipes, their applications, advantages, and disadvantages.

Introduction

Welded pipes are a crucial component in many industries, and they are used for a wide range of applications. They are made by welding two or more pieces of metal together to create a seamless pipe. Welded pipes can be made from a variety of metals, including stainless steel, carbon steel, and alloy steel. In this article, we will explore the different
welded pipes types and their applications.

Types of Welded Pipes

1. Electric Resistance Welded (ERW) Pipe:
   This type of pipe is created by heating the edges of the metal pieces until they reach a molten state. Then, the edges are pressed together to create a permanent weld. ERW pipes are commonly used in the oil and gas industry and the manufacturing of pressure vessels and heat exchangers.
2. Double Submerged Arc Welded (DSAW) Pipe:
   This type of pipe is created by welding two pieces of metal together using a submerged arc welding process. The weld is made on both the inside and outside of the pipe, creating a stronger weld than other types of welded pipes. DSAW pipes are commonly used in the construction of pipelines for the transportation of oil and gas.
3. Seamless Pipe:
   This type of pipe is created by using a hot extrusion process to create a seamless tube. The tube is then rolled into the desired shape and welded together to create a seamless pipe. Seamless pipes are commonly used in the manufacturing of high-pressure gas cylinders and hydraulic cylinders.

Advantages and Disadvantages of Welded Pipes

Advantages:

• Welded pipes are more cost-effective than seamless pipes.
• They can be made in larger sizes and lengths than seamless pipes.
• They are more readily available than seamless pipes.
• They can be produced in a variety of metals, making them versatile.

Disadvantages:

• Welded pipes are more prone to corrosion than seamless pipes.
• They are not as strong as seamless pipes.
• Welded pipes can be more difficult to repair than seamless pipes.
• They can have a rougher surface finish than seamless pipes.

Conclusion

Welded pipes are an essential component in many industries, and understanding the different types of welded pipes and their applications is crucial. Electric Resistance Welded pipes, Double Submerged Arc Welded pipes, and Seamless pipes are the most common types of welded pipes. Each type has its advantages and disadvantages, and it is important to consider these factors when selecting the appropriate pipe for a specific application.