How To Judge The Quality Of Square Rectangular Tube When Purchasing?

The rectangular pipe is a commonly used material in the industry. How to judge its quality when purchasing? 

First, look at its folding. Inferior square rectangular tubes are prone to folds, and we can see some folded lines on the outside of the tubes, which fully demonstrate that the product is easy to fold. Experts said that the reason why these inferior products have many broken lines is generally that the manufacturers pursue high output and high efficiency when producing products, which leads to a large number of processed products. fold marks. If these square tubes are purchased, these broken lines are prone to breakage. Therefore special attention must be paid.

Secondly, it depends on the surface appearance of the product. The surface of inferior products will have unevenness, and it will feel numb to the touch, while high-quality steel will not have such a bad feeling. The Tianjin galvanized pipe manufacturer stated that the reason for the appearance of the product is that the manufacturer's rolling exceeds the standard, which is often caused by the irresponsibility of the manufacturer who is one-sidedly pursuing production profits. In addition, the appearance of poor-quality pipes is prone to some cracks, usually because the production process is not strictly controlled, and there are problems in the procedure.

Finally, when purchasing, you can also judge its quality by its gloss. Inferior products lack the luster of metal and tend to appear reddish. There are two main reasons for this. First, the temperature set by the industrial workshop is not up to the standard during rolling. Secondly, the steel temperature is not measured accurately, often by visual inspection, so the rigidity of the steel naturally cannot meet the standard.