The use of seamless steel pipe is very wide, especially thick-walled seamless steel pipe. People on the quality of thick-walled seamless steel pipe is a demand, then distinguish the quality of thick-walled seamless steel pipe is what?

The first good quality thick-walled seamless steel pipe is uniform in the composition, in the cut head looks very structured, feeling is a kind of smooth feeling, rather than the feeling of burr stab. So if it is incomplete information, then cut in the head is rugged, and all the steel pipe looks dull. If it is shoddy thick-walled seamless steel pipe, then there will be particularly significant in the color, is showing a light red color, there are residual thick-walled seamless steel pipe in the temperature is not up to standard. The same time as the above-

And that is shoddy thick-walled seamless steel pipe is not a circular cross-section, may be oval may be other shapes, which is because manufacturers save data, cut corners of the results, so it is not fit the size The specification. There is the appearance of the scar is the appearance of this point in the high-quality thick-walled seamless steel pipe is not allowed to show, but in the residual thick-walled seamless steel pipe is very easy to see this appearance.