Appearance Quality Of Seamless Steel Pipe
2024-10-24
Special-shaped seamless steel pipes play a vital role in urban construction. Their quality directly affects the solidity and quality of living buildings. If you want to choose a high-quality square pipe in the square pipe market, first of all It is necessary to learn to identify low-quality square pipes. Special-shaped seamless steel pipes are all inspected by experts of special-shaped seamless steel pipes. Of course, he has his own unique view. Inferior special-shaped seamless steel pipes have the following characteristics:
The surface is not smooth
Inferior special-shaped seamless steel pipes may have surface folding, pitting, scarring, cracking, easy scratching, etc. due to the raw materials, simple rolling equipment, unprofessional technical methods and low cost. Generally, this situation can be passed. Observed by the naked eye, it is recommended that when the majority of consumers encounter the above situations, they must be treated rationally. Do not buy low-quality square pipes for the sake of cheapness. The strength and hardness of these special-shaped seamless steel pipes are not up to the standard, which will affect future use. of.
No metallic luster on the surface
Some low-quality special-shaped seamless steel pipes are made of adobe, and the temperature is not standard. The steel temperature is grasped by visual inspection, so that the rolled steel will appear light red or the color of pig iron, without the metallic luster and performance of genuine special-shaped seamless steel pipes. Not to mention the above.
The cross section and the cutting head are not flat
In order to save raw materials, inferior special-shaped seamless steel pipes have a large reduction in the second pass before the finished roll, resulting in an elliptical cross-section. The cut section of the inferior square pipe often has meat loss, that is, unevenness. Therefore, once you find that the cross section of the square tube is elliptical and the cut end is uneven, everyone should be wary of it. This is a low-quality square tube.
unqualified size and weight
Generally, the size of inferior special-shaped seamless steel pipes fluctuates greatly, and in order to save raw materials, most of them are not heavy enough, so when you buy square pipes, you can check the national standards and sizes in advance, and you can ask for accurate when you check the samples. Square tube size and weight. This way you can avoid being fooled.
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