How to select high-quality square rectangular steel tube?
How to select high-quality square rectangular steel tube?
Square rectangular steel pipe is the main data in construction. The most important thing for us is quality. Most construction enterprises need to purchase more square tubes at one time, so quality measurement must be done to ensure the selection of appropriate profiles and avoid the impact of later construction. However, now there are many manufacturers that supply this kind of profile, and the product quality and quotation of each manufacturer are different, so how to measure its quality? How to buy high-quality products?
1. Preferred manufacturer of regular square tube
After all, wholesale purchasing managers should pay attention to the price situation. If you can cooperate with regular manufacturers, you can enjoy both the wholesale price of direct sales of manufacturers and the after-sales service of manufacturers. 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 will reduce raw materials to a certain extent in order to better reduce product costs. Alas, although such products are cheap, it is better not to buy them.
2. You should know some performance parameters of square rectangular steel pipes.
First of all, we can see that in order to have good efficiency, we must first grasp the plasticity of square tubes. 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, the hardness should be reasonably planned and arranged when selecting. If the hardness is weak, even if the elasticity is good, there will be many disadvantages when dealing with some strong pressure. When selecting square tube, pay attention to select some products with good fatigue performance. When we use it, we will find that due to the efficiency of the product itself, to some extent, our metal parts are insufficient. These problems need our special attention and treatment. Some good products can largely avoid problems, and also make our use more convenient and reasonable.
3. It is necessary 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 certificates, quality control certificates, honors and engineering cases owned by the enterprise. This reflects the factory's product quality and after-sales guarantee from the side. It's also quite reassuring.
4. Look at the physical objects of rectangular tube products
First, look at the material. There are many kinds of square tube materials, and the efficiency of square tube with different materials is also different. Therefore, the square tube of corresponding material must be selected according to the specific requirements of the housing project to ensure its applicability.
Secondly, check whether the weld on the surface of square tube is welded tightly. Not all square tubes are seamless square tubes. Some square tubes are processed by welding. So check whether the weld is tight when purchasing. The square tube that is not tightly welded should not be used.
Check again whether the large surface of the square tube is rusted. Some square and rectangular steel pipes will rust due to improper storage. The square tube with serious rust 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 slight rust treatment on the surface will not affect the quality.
5. Look at the package
Most square tubes are packed in large bundles when leaving the factory. The steel bundles are hung with metal labels corresponding to the real objects, indicating the manufacturer, steel type, 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 is the largest square tube manufacturer in China, with its own product laboratory. Its products have passed European CE certification, American ABS certification, Australian AS1163 certification, 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. Email: sales@ytdrgg.com
