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### Definition and Classification of Steel Pipes (Part 1) Steel pipes are hollow long steel bars that are widely used as fluid transmission pipes, such as for oil, natural gas, water, gas, steam, etc. Additionally, due to their similar bending and torsional strength but lighter weight, they are also extensively used in manufacturing mechanical parts and structural components. Steel pipes [...]

How Much Do You Know About the Causes of Cracking in Precision Steel Tubes? Those who frequently work with precision steel tubes likely have their own understanding of the drawbacks of these tubes. One common issue with precision steel tubes is their tendency to crack. Once a precision steel tube cracks, it needs to be repaired, and the process can [...]

Introduction to Hot Treatment Process of Wide and Thick Steel Plates Background Introduction With the continuous development and improvement of China's industrial technology level, the overall demand for wide and thick steel plates has increased in various industries such as shipbuilding, mechanical processing, coal mining equipment, mining machinery, petrochemicals, and bridge construction. Simultaneously, there is a growing demand for high-grade, [...]

The Repeatable Times of Quenching and Tempering Repeated quenching is a common occurrence. If the initial quenching fails or the tempering is excessive, re-quenching or re-tempering becomes necessary. However, repeated quenching can lead to quenching cracks due to the accumulation of quenching stress and coarsening of crystal grains, which increases hardenability. Consequently, the chances of deformation and quenching cracks also [...]

Deburring Methods in Metal Processing Burrs are ubiquitous in metal processing. No matter how advanced and precise the equipment is, burrs will inevitably appear on the finished product. They are primarily caused by plastic deformation of the material, resulting in unwanted excess material along the machined edges. Ductile and malleable materials are particularly susceptible to burr formation. Common types of [...]

**Differences Between Straight Seam Steel Pipe, Spiral Steel Pipe, and Seamless Steel Pipe** **Welding Process** In terms of the welding process, the welding methods for spiral welded pipes and straight seam steel pipes are the same. However, straight seam welded pipes inevitably have many T-shaped welds, which greatly increases the probability of welding defects. Moreover, the residual stress at the [...]