Many users buy spiral steel pipe, due to the lack of professional testing equipment, this time only from the appearance of the quality of spiral steel pipe detection, the following are several common methods of determination.
1, from the surface of the spiral steel pipe to see whether the manufacturing process of spiral pipe is exquisite, generally speaking good spiral steel pipe? Company in the production ** will be careful and careful, there will not be some friction flaws, etc. appear. Fake spiral steel pipe cross-section is oval, the reason is that manufacturers in order to save materials, finished rolls before the second press down the amount of large, the strength of this rebar greatly reduced, but also does not meet the standards of the rebar shape size. The composition of high quality steel is uniform, the tonnage of cold shear is high, and the end face of the cutting head is smooth and neat, while the material of shoddy material is poor, and the end face of the cutting head often has the phenomenon of falling meat, i.e., unevenness, and no metallic luster. And because of the shoddy material manufacturers products cut head less, the head and tail will appear large ears.
The appearance of how to detect the quality of spiral steel pipe?
2, to knock on the metal steel pipe, if the sound is crisp and echo is not very foul words that the name spiral steel pipe is the choice of * new, rather than waste spiral pipe recycling.
3, the appearance of the welded joint inspection is a simple and widely used inspection method, is an important part of the finished product inspection, mainly to find defects in the surface of the weld and deviations in size. Generally observed by the naked eye, with the help of standard samples, gauges and magnifying glasses and other tools for inspection. If defects appear on the surface of the weld, there is the possibility of defects inside the weld.