The fluid tube is a hollow, tubeless steel structure designed for the transportation of materials that exhibit fluid-like behavior. It can carry not only liquids such as water, oil, and chemical solutions, but also solid substances like cement, grain, and coal dust under specific conditions. These tubes are versatile in material selection, ranging from carbon steel to non-ferrous metals like copper and titanium, and even non-metallic options such as plastics or composites.
While the most common cross-section is round, fluid tubes can also be manufactured in square, triangular, or other custom shapes depending on the application requirements. Although some specialized equipment may require rectangular or oval tubes, the majority of fluid pipes still use the traditional circular design due to its structural efficiency and ease of manufacturing.
Historically, seamless steel tubes were the standard choice for fluid transport systems. However, with advancements in materials science, forming technologies, and production equipment, welded tubes have become increasingly popular. They offer advantages such as more uniform wall thickness, higher dimensional accuracy, lower energy consumption, and greater production efficiency. This makes them ideal for high-performance applications, especially in critical industries like oil and gas pipelines, where strict standards like API must be met.
In the past, the U.S. relied almost entirely on seamless pipes, but today, the use of welded tubes has grown significantly. In Japan and many European countries, over 95% of pipeline systems now use welded tubes instead of seamless ones, reflecting a shift toward more cost-effective and efficient solutions.
Whether for industrial, agricultural, or construction purposes, fluid tubes continue to evolve, adapting to new demands and technological progress.
Source: 51 Steel Tube Net
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