The difference between stainless steel seamless pipe and seamed pipe

Huzhou Nanxun Yintuo Special Material Technology Co., Ltd. specializes in the development and production of high-quality stainless steel seamless tubes and nickel-nickel alloys. Let’s introduce the stainless steel seamless pipe what is the difference with stainless steel seam pipe.

The manufacturing process of the stainless steel seamless pipe is to punch a hole in the stainless steel billet at a temperature of 2200°f. At this high temperature, the tool steel becomes soft and spirally formed from the hole after punching and drawing. In this way, the wall thickness of the pipeline is uneven and the eccentricity is high. The wall thickness difference of seamless pipes is greater than that of seamed pipes. Since the stainless steel seamed pipe is made of precise cold-rolled plates, the wall thickness tolerance of the seamed pipe is very small, and the wall thickness is very uniform throughout the circumference.

There are certain differences in the chemical composition of stainless steel seam pipes and stainless steel seamless pipes. The steel composition for producing seamless pipes is only the basic requirement of astm. The steel used to produce seamed pipes contains chemical components suitable for welding. For example, the mixing of silicon, sulfur, manganese, oxygen, and triangular ferrite in a certain proportion can produce a weld melt that is easy to transfer heat during the welding process, so that the entire weld can be penetrated. Steel pipes lacking the above chemical composition, such as seamless pipes, will produce various unstable factors during the welding process, which are not easy to weld firmly and imperviously.

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