解析
Introduction
JGJ81-2002 is a set of national standard, which regulates the welding technology process of Building Steel Structure. It also outlines the basic requirements for welding procedures and the specific welding requirements for steel structure construction buildings.
Welding Process
The welding process described in this standard mainly includes the pre-welding inspection, the processing of welding materials, and the welding requirements. For example, the pre-welding inspection should be conducted to ensure that the welding process is implemented in a safe and satisfactory manner. In the processing of welding materials, the cover passes need to be checked, the material needs to be compatible, and the welding material needs to meet the requirements of the relevant national standard. In addition, the welding process should meet the requirements of the basic standards for welding steel structures, such as the use of qualified welding consumables and welding equipment, conform to the requirements of welding technical specifications and welding operation procedures, do heat treatment when necessary, and take measures to prevent the welding drop.
Inspection Requirements
The inspections mentioned in this standard focus on the welding, heat treatment, and assembly inspections. For welding inspections, the welding quality should meet the design requirements. If a weld crack appears, the weld should be repaired or replaced. For heat treatment inspections, the welding zone should be subjected to temper brittleness test, hardness test etc.
In addition, after the assembly of the building steel structure is completed, the welding quality should be checked. If there is a large gap or the weld is concentrated, it should be corrected. If there is a weld defect, the influence of the weld defect on the structure should be considered and rework should be carried out in a timely manner.
Conclusion
In conclusion, JGJ81-2002 regulation on the technology process of Building Steel Structure is a set of national standard. It outlines the requirements on pre-welding inspections, welding materials processing and welding requirements; and specifies the inspection requirements on welding, heat treatment, and assembly. It provides a comprehensive answer to the technical requirements related to welding of building steel structure.
