Material and application of seamless steel pipe

? Wuxi Duorunde Steel Pipe Co., Ltd. (my answer); ? Seamless pipe and cold-drawn seamless precision steel and seamless pipe have some differences in the following aspects:

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1. manufacturing process: seamless pipes are usually made by hot rolling or cold drawing, and cold-drawn seamless precision steel pipes are made by cold drawing. Cold drawing process is to reduce the error and improve the accuracy by accurately controlling the shape and size of steel pipe. In contrast, the manufacturing process of seamless pipe is relatively simple, and its accuracy and surface quality are limited by process technology and equipment accuracy. ?

2. Precision and surface quality: The precision and surface quality of cold-drawn seamless precision steel are higher than that of seamless pipe. Cold-drawn seamless precision steel pipe will be accurately finished in the manufacturing process, including deburring, trimming, polishing and other steps to further improve its surface quality and accuracy. In contrast, there may be some defects on the surface of seamless pipe, such as folding, cracking and corrosion.

3. Material: Seamless pipes are usually made of ordinary carbon steel, high-quality carbon steel and alloy steel, while cold-drawn seamless precision steel pipes are usually made of high-strength materials such as high-quality carbon steel, alloy steel and stainless steel. These high-strength materials can make seamless pipes with higher strength, which are suitable for worse environmental conditions.

4. Uses: Seamless steel pipes are widely used in the fields of construction, pipeline and machinery manufacturing. , used to manufacture common fluid conveying pipes, supports, support rods and other structural parts. Cold-drawn seamless precision steel pipes are mainly used to manufacture high-precision mechanical parts, high-precision instruments and fluid conveying pipelines in special environments. These application fields require high precision and surface quality of steel pipes, so the application range of cold-drawn seamless precision steel pipes is wider.

5. Cost and production efficiency: Because the manufacturing process of cold-drawn seamless precision steel pipe is complicated and requires advanced equipment and technology, the manufacturing cost is relatively high and the production efficiency is low. In contrast, the manufacturing cost of seamless pipe is relatively low, and the production efficiency is also high, which is suitable for mass production.

6. Quality inspection and control: The quality inspection and control of cold-drawn seamless precision steel pipes are stricter, and advanced inspection equipment and standards are needed for evaluation. In addition to paying attention to the diameter, wall thickness, length, internal and external surface quality, mechanical properties and chemical composition of steel pipes, it is also necessary to carry out accurate size detection, surface roughness detection and metallographic analysis to ensure the quality and accuracy of the final products meet the requirements. In contrast, the quality inspection and control of seamless steel pipes mainly focus on the diameter, wall thickness, length, internal and external surface quality, mechanical properties and chemical composition of steel pipes, and are evaluated by conventional inspection methods and standards. ? There are some differences between seamless pipe and cold-drawn seamless precision steel and seamless pipe in manufacturing technology, precision and surface quality, materials, uses, cost and production efficiency, quality inspection and control. Seamless pipe is a kind of common steel pipe, with relatively simple manufacturing process and wide application. Cold-drawn seamless precision steel pipe is a kind of steel pipe with high precision and high surface quality. Its manufacturing process is complex and its use is special. When choosing to use, you need to choose according to the specific application scenarios and requirements.