Welding technology regulations for steel structure of building 2002 (Part 3)
The steel structure welding process is the most critical aspect in the entire building completion process, and welding quality puts a direct impact on the durability, reliability and strength of the building. Therefore, there are strict technical regulations for the welding process that must be adhered to in order to reach the desired result.
Welding methods and processes used in the steel structure of building must be conformed to JGJ81-2002 standards. The steel parts must be welded together by an electric arc welding machine and the welding seam shall be fusion welded and continuous seam welded. The welding size and spatter of the connection must also meet all the required standards.
When welding the steel structure of building, fillets must be made with clean and dry welding wire. The welding arc shall be as close as possible to the root and it shall not be too rough, long or short. The welding position shall be suitable according to the shape of the welded parts. The welding materials can be selected according to the welding condition and the base metal.
During the steel structure welding, the orientation of the welding seam must meet the technical requirement of the drawing and the welders must adopt suitable welding current, voltage and welding frequency. During welding, the arc shall be suspended at regular intervals to prevent welding spatter and slag. The welding accessories and tools must be managed according to the technical requirements to ensure the quality of the welded steel structure.
The quality of th weld and welded joints shall be inspected strictly before it is installed in the building. The surfaces of the weld and welded joints must meet the requirements for smoothness and evenness. The imperfect welds must be removed. Furthermore, welding seam, heat affected zone and flat area of the welded joint must meet the necessary requirements.
In summary, the welding process of the steel structure of building must strictly follow the requirements of JGJ81-2002 standards. The welding methods and processes should be carried out in an orderly and precise manner to ensure the quality of the building. The welds must be inspected before installation and any imperfect welds must be removed. With the requirements of JGJ81-2002 standards in mind, the steel structure welding process for building can be done in an efficient and quality manner.
