The roughness of seamless steel pipe refers to the unevenness of the surface of the pipe wall. This indicator is crucial to the performance and appearance of the steel pipe. Generally speaking, the inner and outer surface roughness of seamless steel pipes is controlled below Ra 0.8μm. It ensures that the steel pipe has good wear resistance, corrosion resistance, and sealing during use, and it is easier to achieve better sealing performance and thermal conductivity.

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