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Standard specifications of small diameter seamless steel pipes
Small-diameter seamless steel pipes refer to seamless steel tubes with relatively small outer diameters. They can be categorized into seamless small-diameter pipes and straight-seam (welded) small-diameter pipes. In general, pipes with an outer diameter between 4 mm and 89 mm fall into the small-diameter range. Although widely used, many users have limited familiarity with their specifications. These pipes are produced and inspected in accordance with standards such as ASTM A106, ASTM A53, EN 10216, and GB/T 8163, which define their chemical composition, mechanical properties, and dimensional tolerances.
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Square tube size calculation
Square tubes (SHS steel) are widely used in construction, machinery manufacturing, and various structural applications. They are typically produced by forming cold-rolled or hot-rolled steel sheets into a hollow square section. Thanks to their geometry, square tubes offer high strength, good compressive performance, low weight, easy processing, and a broad range of available specifications. To support engineering design, procurement, and fabrication, it is essential to understand how to calculate square tube dimensions, theoretical weight, cross-sectional area, and standard size classifications. The following provides a complete and practical guide.
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Advantages of galvanized square tubes
Galvanized hollow sections are widely used in modern construction, serving applications in building projects, machinery manufacturing, road and bridge construction, shipbuilding, and more. As an economical and practical metal tubing option, they offer strong corrosion resistance, durability, easy processing, high strength, and a long service life.
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Introduction to square tube wall thickness
Square tubes (SHS steel) are widely used in structural engineering, manufacturing, machinery, and architectural applications. Among all their specifications, wall thickness is one of the most critical parameters, directly influencing strength, stability, weight, cost, and long-term performance.
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Square and rectangular tubes thickness selection
Square tubes and rectangular tubes—also known as cold-formed hollow structural sections—are widely used in construction, machinery, and fabrication. Among all parameters, wall thickness (Square & Rectangular Tube Thickness) is one of the most critical indicators that directly determines mechanical performance, service life, and cost.
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What is the equivalent materails of JIS G 3452?
As global engineering projects continue to expand, the need for seamless alignment between different national steel pipe standards has become increasingly important. To support our customers in selecting the right materials, we have compiled the latest comparison of JIS G 3452 (Carbon Steel Pipes for Ordinary Piping) with several widely used international standards. This reference aims to simplify material selection and enhance procurement efficiency for global projects.
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JIS G3452 carbon steel pipe dimension
JIS G3452 is a standard for ordinary-purpose carbon steel tubes manufactured by ERW (electric resistance welding) or BW (butt welding). It is commonly used in water supply and drainage systems for conveying water and other non-corrosive liquids or gases. This article will introduce the specified dimensions of JIS G3452 pipes.
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Top 8 seamless steel pipe manufacturers recommended in 2025
With the rapid growth of high-end manufacturing, new energy, and infrastructure industries, seamless steel pipes, often referred to as the “blood vessels” of modern industry, are witnessing a steady increase in demand for high precision and customized solutions. This article will introduce Top 8 seamless steel pipe manufacturers recommended in 2025.
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API 5L GR.B galvanized seamless steel pipe
API 5L GR.B galvanized seamless steel pipe is an essential material for modern fluid transportation systems, widely used in oil pipelines, natural gas pipelines, and industrial process lines. With its internal and external hot-dip galvanizing process, high zinc coating, and smooth, scratch-free surface, this steel pipe delivers superior corrosion resistance and excellent flow efficiency—ensuring safety, reliability, and durability across complex operating environments.
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Carbon steel galvanized pipe vs carbon steel black pipe
Carbon steel black pipe is made from uncoated carbon steel. Its dark surface results from a thin layer of iron oxide formed during manufacturing. When the steel is heated and forged, a black scale naturally appears, creating the distinctive finish typical of black pipes. Carbon steel galvanized pipe is coated with a protective layer of zinc. During the galvanizing process, the pipe is dipped into molten zinc to form a uniform, corrosion-resistant coating. This zinc barrier extends the pipe’s lifespan and enhances its resistance to rust and wear.
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