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best seamless welded pipe

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  • [Industry News] How to control the defects of the inner surface of seamless steel pipes

    The shortcoming of the internal scab of the hot continuous-rolled seamless steel pipe is that there are dents similar to the size of soybean grains on the inner surface of the seamless steel pipe, and most of the scabs contain dark red or dark gray dirt. The influencing factors of internal scab are: metal oxide removal agent, gasifier processing technology, mandrel lubrication and other factors. Below is a look at how to manipulate the inner and surface defects of seamless steel pipes:

  • [Industry News] Seamless steel pipe thread connection process

    Seamless steel pipe thread connection process1. The production process of seamless steel pipes can be divided into two types: cold-drawn and hot-rolled. The production process of cold-rolled seamless steel pipes is generally more complicated than that of hot-rolled. The tube billet must first underg

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