Welding Techniques in Steel Structures According to JGJ81-2002 Standard
As one of the most widely used materials in structural engineering and construction, steel has become an integral part of the modern building and civil engineering industry, due to its properties such as strength and durability. As a result, welding has become an unavoidable part of steel construction, both for the joining of two different pieces of steel and for reinforcement. Welding of steel requires welding techniques that are in accordance with JGJ81-2002 standards.
The JGJ81-2002 specification sets out requirements for welders and the quality of welding techniques of steel structures. The aim of these requirements is to ensure that the welding techniques used in steel structures are safe, reliable and efficient. As such, the standards require welders to adhere to certain minimum safety and quality levels when welding. In addition to safety requirements, the standards also set out technical requirements related to the welding of steel structures.
These technical requirements cover a wide variety of topics ranging from the selection of welding materials, to the preparation of the material and the types of welding techniques that should be used for different materials. For example, for the welding of aluminium and high strength steel, the standards require the use of the submerged-arc welding technique which provides a high level of strength and consistency. Similarly, for the welding of structural steel and other structural members, the standards require arc welding to be used in conjunction with back-gouging or scarfing.
The welding of steel structures according to JGJ81-2002 requires welders to be familiar with the differences between manual and automatic welding, as well as the properties of different types of welding materials. Welders should also be aware of the safety precautions involved in working with welding materials, such as proper clothing, safety glasses, and welding masks. Furthermore, welders should be aware of the different types of welding machines and the proper maintenance of such pieces of equipment.
Finally, the standards require that welders have adequate access to testing equipment and other related products, in order to ensure that welders are able to undertake tests related to the quality and quantity of the welds. This testing equipment may include thermometers and hardness testers, which can be used to evaluate the quality of the welds, as well as other related equipment.
Overall, the JGJ81-2002 standards are an important requirement for steel structures, as they provide welders with the guidance and requirements necessary to produce high quality and safe welds. Following these standards allows welders to produce welds that are of the highest standards and will help ensure the longevity and durability of the steel structure.
