The maximum diameter of hollow steel tubes available can vary depending on the specific manufacturer and supplier. However, in general, hollow steel tubes can range in diameter from a few millimeters to several meters, depending on the intended application and industry requirements.

Yes, hollow steel tubes can be used in the automotive industry. They are commonly used in various applications such as chassis, roll cages, exhaust systems, and structural components due to their strength, durability, and lightweight nature.

Yes, hollow steel tubes can be used for display stands. They are strong and durable, making them ideal for supporting various items for display purposes. Additionally, the hollow design allows for easy customization and adjustment of the stand's height and structure.

When welding hollow steel tubes, there are several important considerations to keep in mind. Firstly, it is crucial to ensure that the tubes are properly aligned and clamped together to maintain their shape and prevent distortion during the welding process. This can be achieved using specialized fixtures or jigs. Secondly, the choice of welding technique and equipment is essential. Depending on the specific requirements of the application, various welding methods such as TIG (Tungsten Inert Gas), MIG (Metal Inert Gas), or even laser welding can be used. The selection should be based on factors such as the tube thickness, material properties, and desired weld quality. Additionally, the welder must be proficient in controlling heat input to avoid overheating or burning through the thin walls of the hollow tubes. Adequate preheating and post-welding cooling procedures might also be necessary to minimize potential distortion or residual stresses. Furthermore, it is important to consider the type of filler metal to be used. The compatibility of the filler metal with the base material should be ensured to achieve optimal weld strength and corrosion resistance. Lastly, proper ventilation and safety precautions are essential when welding hollow steel tubes. The process may produce fumes and gases, so adequate ventilation and personal protective equipment (PPE) should be used to protect the welder's health. Overall, the considerations for welding hollow steel tubes involve proper alignment, choice of welding technique and equipment, control of heat input, selection of filler metal, ventilation, and safety measures. These factors play a crucial role in achieving high-quality welds and ensuring the structural integrity of the final product.