I believe most people will think that the 310S stainless steel seamless pipe is not much different from the slotted pipe. As long as the inner wall of the slotted pipe is smooth enough and the overall quality is good enough, the slotted pipe can be used to replace some seamless pipes. But do you know that the difference between stainless steel seamless pipe and seamless pipe is more than a little visible to the naked eye. The following stainless steel seamless pipe is introduced to you.
There are some differences in chemical composition between stainless steel seamed pipe and stainless steel seamless pipe. The steel composition of seamless pipe production is only to meet the basic requirements of ASTM. The steel used for the production of slotted pipes contains chemicals suitable for welding. Steel pipes that lack the above chemical components, such as seamless pipes, will produce various unstable factors in the welding process, which are not easy to weld firmly and thoroughly.
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 in the welding process, so as to make the whole weld penetration. Seamed stainless steel tubes are made of accurate cold-rolled sheets that have been tested, so any defects are limited to the weld. Seamless pipe is made of stainless steel blank by punch stamping, resulting in many tears in the pipe wall formed by extrusion.
Eddy current test shows that the defective rate of slotted stainless steel pipe is usually lower than that of seamless stainless steel pipe. Using ultrasonic testing, the background noise of seamless stainless steel welded pipe is so great that it is difficult to find its defects. However, the background noise of seamed stainless steel welded pipe is very low, and it is easy to find defects. The manufacturing process of stainless steel seamless pipe is to punch a hole in the stainless steel billet at 2200 ° F. at this high temperature, the tool steel becomes soft and spirally formed from the hole after stamping and drawing.
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