Steel pipes used in industrial operations fall into two categories: seamless and seamed. Understanding their differences is essential to evaluating which is best for you.
Overview of Seamless Steel Pipes
원활한 파이프 are considered stronger and more reliable than welded pipes due to their uniform structure and absence of welds or joints.
As you might have guessed by the name, seamless steel pipes do not have a welding seam. The primary raw material for making seamless pipes is steel billets. Billets are perforated using a piercing tool, resulting in a jointless steel tube. These pipes are straight and do not have any welded corners or angles. Seamless steel pipes are manufactured by hot rolling, cold rolling, or cold drawing. Seamless steel pipes have excellent bending and torsion strength. For this reason, they are seen in high-pressure applications. They compose oil rig pipes, automobile drive shafts, chemical plants, and construction support structures.
Overview of Seamed Steel Pipes
Seamed steel pipes are also called Welded Steel Pipes. Steel strips or plates are primary raw materials. Because they are generally round and commonly seen in water/oil/gas transportation. They have a longitudinal welding seam along their body. With post-processing, this seam is barely visible. During manufacturing, rollers form steel plates into a cylindrical shape. Welding is performed to attach the ends through the ERW or SAW process. Post-welding treatment ensures the pipe is dimensionally correct and meets the strength requirements. Seamed steel pipes are primarily employed in water, oil, gas, or sewage pipelines. They are mostly seen in the construction industry.
Differences Between Seamless and Seamed Steel Pipes
Production Process
While seamless pipes are made through billet extrusion and rolling, seam pipes are made by joining steel sheets by welding. Due to their different production processes, they have different characteristics. For example, welded steel pipes contain silicon, sulfur, and manganese. These elements increase the weld performance. However, they are absent in seamless steel pipes. Also, due to the laborious production process of seamless pipes, ASTM allows them to have broader wall thickness irregularities than seamed pipes.
Structure and Performance
Due to the penetration of the steel tool during billet perforation, seamless pipes have higher eccentricity. Welded steel pipes are made from drawn and rolled steel sheets, offering higher thickness precision. Seamless steel pipes have more tensile strength than seam pipes, but they are unsuitable for welding purposes. It is easier to produce thick-walled seamless pipes and thin-walled seamed pipes.
Cost and Efficiency
Manufacturing seamless steel pipes is challenging than seam steel pipes. Since they are made to a single length, their assembly has to be a fixed size and operate slowly. Seamless steel pipes have a higher thickness than welded pipes, adding to their production cost and time. Due to these factors, seamless pipes cost twice as much as seamed pipes.
Appearance and Precision
One primary difference between these two pipes is the weld seam. If you examine the inner wall of a seamed pipe, you will find a longitudinal weld seam. It is absent in the case of seamless steel pipe. Seamless pipes are also generally thicker and broader than seamed pipes.
Applicable Environment
Once you know the environment in which to deploy steel pipes, you can figure out the best alloy composition. However, their performance does not differ substantially. Seamless steel pipes generally have greater wall thickness and external diameter. It makes them ideal for oil and gas pipe networks. They act as structural components in industrial machinery. Seamed steel pipes are more suitable for low-pressure applications. They are immensely versatile and appropriate for pipelines with angles and bends. For this reason, they are employed in domestic pipelines, chemical plants, water treatment facilities, etc.
결론
The different properties of seamless and seamed steel pipes largely determine their application scenarios. Before investing in pipes for your project, you must keep their distinct qualities in mind. Planning a domestic water supply? Welded steel pipes will be perfect for you. Laying a gas pipeline across a stretch of land? Consider seamless steel pipes. If you have any questions regarding steel pipes, we encourage you to 문의하기. We would gladly assist you in selecting pipes.