21. What is the difference between high-frequency welded square pipe and round pipe?

21.1. Distinction of production processes
Production process of square rectangular welded pipe: raw material preparation, feeding and uncoiling, shearing butt welding, material storage, leveling, forming, sizing, deburring inside and outside, cooling, sizing, sawing, inspection, packing and stacking.
21.2. Differentiation of performance characteristics
Square rectangular welded pipe: It has high structural stability and load-bearing capacity, and is suitable for use in situations where it is subjected to large pressures and loads. At the same time, its beautiful and elegant appearance also makes it widely used in architecture, decoration and other fields.
High-frequency welded round tubes: Due to the use of high-frequency welding process, their welding quality is high, the weld strength is close to that of the base metal, and there is no need to add filler metal during the welding process, reducing production costs. In addition, high-frequency welded round pipes also have excellent corrosion resistance and fatigue resistance.
21.3. Differentiation of application fields
Square rectangular welded pipe: widely used in construction, machinery manufacturing, bridge construction and other fields. In the field of construction, square rectangular welded pipes are often used to make beams, columns, support structures, etc. In the field of machinery manufacturing, it is used to make frames, brackets and other parts of various mechanical equipment.
High-frequency welded round tubes: mainly used in fluid transportation, structural support and other fields. For example, in the pipeline system of water supply, drainage, gas supply, heating and other pipelines, high-frequency welded round pipes are used as the main transmission pipelines; In petroleum, chemical and other industries, it is also commonly used to make various process pipelines and equipment.