In the construction process of steel structures, the quality of welds directly affects the stability and safety of the building. Different weld grades represent different strengths and load-bearing capacities, and choosing the appropriate weld grade is a crucial step in ensuring the quality of the project. According to the national standards of China, the quality grades of steel structure welds are divided into three levels: Level 1, Level 2, and Level 3.
Level 1 welds are the most stringent in terms of quality requirements. They require the weld connection to be secure, without defects such as cracks, porosity, slag inclusion, or weld misalignment, and the welding quality should meet the highest standards. Level 1 welds are commonly used in structures subjected to critical loads, such as steel large span bridges, prefab high rise buildings.
（Hengon Welding Technique）
The quality requirements for Level 2 welds are lower than those for primary welds, but the integrity of the welded connections must still be ensured. A small amount of defects such as cracks, bubbles, or slag inclusions are permitted, as long as these do not affect the overall strength and stability of the steel structure. Level 2 welds are primarily used in general steel structure projects, such as prefabricated steel structure warehouses, customized industrial factory, steel frame sports arenas, and so on.Hengon's welding standards are strictly guaranteed to weld Level 2 and above.
（Hengon Welding Technique）
The quality standards for Level 3 welds are relatively lenient. While the welded connections must remain secure, a certain number of defects are permissible, provided they do not affect the strength and stability of the steel structure. Level 3 welds are typically used for temporary buildings or enclosures.
（Welding technology in other companies）
To ensure that each project operates stably in high-intensity environments,Hengon as a direct supplier of prefabricated steel structure buildings, Our steel structure products always meet the highest weld grade standards both domestically and internationally. This is not only a commitment to safety but also a comprehensive guarantee of the trust our customers place in us.
