The national standard for Q345 seamless steel pipe is GB T1591-2008 "Low Alloy High Strength Structural Steel". The standard stipulates the grade, classification, code, size, shape, weight, technical requirements, test methods, inspection rules, packaging, marks and quality certificates of Q345 seamless steel pipes.
Q345 seamless steel pipe is made of high-quality carbon structural steel or low-alloy structural steel hot-rolled or cold-rolled, with high strength, high toughness, fatigue resistance, low temperature resistance and other characteristics, and is widely used in petroleum, chemical, electric power, shipbuilding, machinery manufacturing and other fields. In the construction field, Q345 seamless steel pipes are also often used as supporting structures and load-bearing structures for high-rise buildings.
In order to ensure the quality and reliability of Q345 seamless steel pipes, the state has formulated relevant quality standards and inspection rules. In the production process, production enterprises need to carry out production and inspection in accordance with national standards to ensure that the quality and performance of products meet the requirements. At the same time, in the process of procurement and construction, it is also necessary to pay attention to the selection of products that meet national standards, and install and use them in accordance with the specifications to ensure safety and reliability.
In short, the national standard for Q345 seamless steel pipe is GB T1591-2008 "Low Alloy High Strength Structural Steel", which stipulates the technical requirements and inspection rules of the product, which is of great significance for ensuring the quality and reliability of the product. In the process of production, procurement and construction, it is necessary to follow national standards to ensure that the quality and safety performance of products meet the requirements.