People who work with pipes have had to keep up with the changes in industrial applications and how they work. There are many ways to make pipes, but the most common debate in the industry is about electric resistance welded (ERW) vs. seamless (SMLS) steel pipe. Both ERW and seamless steel pipe manufacturing methods have been used for a long time. Over time, the methods used to make each have become better. So, which one is better?
Making welded pipe
A skelp is a long, coiled piece of steel that is used to make welded steel pipe in Malaysia. Cut the skelp to the length you want. This leaves you with a flat, rectangular sheet. The outside circumference of the pipe will be the width of the sheet’s shorter ends. This value can be used to figure out the pipe’s outside diameter. It rolls the rectangular sheets and curls the longer sides toward each other, making a tube. When high-frequency electricity is used in the ERW process, it melts and fuses together the edges, making them look like they are joined together. EFW pipe is better because it doesn’t need to be fused together. The weld seam is not visible or felt, so it’s a good thing. That’s not the case with double submerged arc welding (DSAW), which leaves behind a visible weld bead that needs to be removed depending on the use. Welded pipe manufacturing has become better over time. High-frequency electric currents for welding have been one of the most important things that has happened in the last few years. Before the 1970s, low-frequency electricity was used. Weld seams made by low-frequency ERW were more likely to corrode and fail. Most types of welded pipe need to be heated after they are made.
Creating a seamless pipe
A billet is a piece of steel that is solid and cylindrical. It is used to make seamless piping. They are still hot when a mandrel is used to make holes in the middle of them. The next step is to roll and stretch the hollow billet, which is the next thing to do. The billet is rolled and stretched to the exact length, diameter, and wall thickness that the customer wants. Some types of seamless pipes harden as they’re made, so they don’t need to be heated after they’re made. Others need to be heated. The specification of the seamless pipe you’re looking at can tell you if it needs to be heated up before it can be used.
In what ways can straight seam welded steel pipe be put to good use?
This type of steel pipe is made by coil welding hot-rolled or cold-rolled metal plates and strips together. The longitudinally welded pipe is called a “longitudinal” welded pipe. Two types of straight seam welded steel pipe are made with different wall thicknesses. Ordinary steel pipe and thickened steel pipe are the two types. There are two types of steel pipes: those that have threads and those that don’t. The nominal diameter and wall thickness of longitudinal welded steel pipe are used to describe the pipe’s size. It can be broken down into thin-walled straight seam pipe and thick-walled straight seam pipe based on the thickness of the walls. In terms of how it looks, it can be divided into pipes that are round or square, or pipes that have other shapes. Straight seam welded steel pipe is mostly used in water supply engineering, the petrochemical industry, the chemical industry, electric power, agricultural irrigation, and urban construction, but it can also be used for other things.