National Technical Specifications for Steel Building Co welding of JGJ81-2002
In 2002, the National Technical Specifications for Steel Building Co welding (JGJ81-2002) was introduced for the construction industry. This document embodies a set of rules and norms that are intended to standardize and regulate the steel building welding industry in China. The standard is applicable for the design and fabrication of steel building structures in civil engineering, industry, and housing projects. This article will provide a detailed overview of the main features and requirements of the standard.
The JGJ81-2002 standard provides a wide range of guidance and regulations in regards to the welding of steel building structures. It specifies the primary requirements to be followed during the construction of these structures. These requirements include the selection of materials and welding processes, selection of welding filler materials, welding of fit-up components, and welding of plates, profiles, and connections.
In addition to the requirements mentioned above, the JGJ81-2002 standard also provides guidance on the welding sequence, welding preheating, and post-welding treatments. The preheating requirements provided in the document emphasize the importance of considering the cooling rate when heating the base material. Post-welding treatments such as stress relieving and grinding are also specified in the document.
Of particular importance are the requirements for auditing and quality control of steel building welding. The standard specifies the requirements for the qualification of welding personnel and the inspection of welds. It also provides specifications for non-destructive examinations such as X-ray, radiography, ultrasonic testing, and magnetic particle testing. The document also provides details about the requirements for equipment repair and maintenance.
Finally, the JGJ81-2002 standard includes a section concerning the production of steel building structures. It defines the requirements for the design, fabrication, installation, and operation of the structures. It specifies the requirements for the selection of weld materials and connection types, and provides guidance on the correct installation and welding of steel building structures.
In sum, the JGJ81-2002 standard provides guidance and regulations pertaining to the welding of steel building structures. It ensures that the quality and safety of all steel building structures are maintained because of its detailed requirements, which have been developed over many decades of research and experience in the field. It is an essential document for all those involved in the Chinese steel building industry as it increases the efficiency and safety of steel building welds and products.
