国产伦精品一区二区三区无广告_欧美日韩在线精品_日本天堂在线播放_91欧美中文字幕_中文一区在线观看_了解最新白虎自慰av_亚洲一级无码毛片_黄少妇三级在线播放_亚洲国产成人乱码_惠民福利宝贝腿开大点我添添公视频免费


The characteristics of stainless steel coils in those years.


Stainless steel seamless steel pipe is a long steel material with a hollow section and no seams around it.
1. Seamless steel pipe manufacturing technology and process:
Smelting>Steel ingot>Rolling>Sawing>Peeling>Perforation>Annealing>Pickling>Ashing>Cold drawing>Head cutting>Pickling>Storage
2. Features of seamless steel pipe:
From the above process flow, we can easily see that: first, the thicker the wall thickness of the product, the more economical and practical it is; the thinner the wall thickness, its processing cost will increase significantly; secondly, the product The process of the product determines its limitations. Generally, seamless steel pipes have low precision: uneven wall thickness, low brightness of the inner and outer surfaces of the pipe, high cost of sizing, and pitting and black spots on the inner and outer surfaces that are difficult to remove; thirdly, its Detection and shaping must be processed offline. Therefore, it reflects its superiority in terms of high pressure, high strength, and mechanical structural materials.

More News