The square tube is the main material in the building. The most important thing for us is the quality. Most construction companies need to purchase more square tubes at one time, so we must do a good job in the quality measurement, so that the selection of suitable profiles can be guaranteed, and also can avoid the impact of later construction. However, now there are many manufacturers that supply such profiles, and the product quality and quotation of each manufacturer are different, so how to measure its quality? How to buy high-quality products?
1. Regular manufacturers are the first choice
After all, the wholesale purchasing manager should pay attention to the price situation. If he can cooperate with regular manufacturers, he can enjoy both the wholesale price of the manufacturer's direct sales and the after-sales service of the manufacturer. In addition, if you want to customize and process different types of profiles and have additional requirements for size, you should also communicate with the manufacturer in advance, so that the profiles purchased later can truly meet our needs. Some small manufacturers, in order to better reduce their product costs, will reduce their raw materials to a certain extent. Therefore, although the price of such products is cheap, But you'd better not buy.
2. You should know some performance parameters of square tube.
First of all, we can see that if a square tube has good performance, the first thing is to grasp the plasticity of the square tube. Generally speaking, the plasticity of square tubes refers to the ability of square tubes to deform without being destroyed under pressure. It plays an important role. Secondly, when selecting, it is necessary to make reasonable planning and arrangement for hardness. If the hardness is relatively weak, even if the elasticity is good, there will be many disadvantages when dealing with some strong pressure. When selecting rectangular tubes, we should pay attention to selecting some products with good fatigue performance. When we use it, we will find that due to the performance problems of the product itself, it will lead to the deficiency of our metal parts to a certain extent. We need to pay special attention to and deal with these problems. Some good products can avoid problems to a large extent, but also make our use more convenient and reasonable.
3. We need to master his qualification certificate and other production and processing technologies, as well as his regulations on the production of finished products. The product inspection certificate, quality control certificate, honors and engineering cases owned by the enterprise. These reflect the factory's product quality and after-sales guarantee from the side. This is also more reassuring.
4. Look at the actual product
First, look at the material. The square tubes are made of many kinds of materials, and the performance of square tubes made of different materials is not the same. Therefore, the square tubes made of corresponding materials must be selected according to the specific requirements of the house project, so as to ensure its applicability.
Secondly, check whether the welds on the surface of square tubes are tightly welded. Not all square tubes are seamless square tubes. Some square tubes are processed by welding. So when purchasing, check whether the welds are tight. The square tubes that are not tightly welded are not easy to use.
Again, check whether the large surface of the square tube is rusty. Some square tubes will rust due to improper storage. The seriously rusted square tube will greatly affect the quality of the square tube, so once it is found that there is serious rust on the surface, it should not be used again. Of course, only a slight rust treatment on the surface will not affect the quality.
5.Look at the package
Most of the square square tubes are packaged in large bundles when they are delivered from the factory, and the steel bundles are hung with metal labels corresponding to the real objects, indicating the manufacturer, steel grade, batch number, specification and inspection code; Small bundles (about ten bundles) or square tubes in bulk will also be sprayed with labels.
Tianjin Yuantai Derun steel pipe manufacturing group It is the largest square tube manufacturer in China, with its own product laboratory. Its products have passed CE certification in Europe, ABS certification in the United States, AS1163 certification in Australia, LEED certification, and passed ISO9001 certification, ISO14001 certification, ISO45001 certification. Its products have more than 80 patent certificates. We are willing to work with colleagues from all walks of life to build stronger buildings. E-mail: sales@ytdrgg.com
Post time: Feb-10-2023
