Cleaning and Maintenance of Steel - Selection and Purchase Skills of Steel

Standards of Steel

are unified regulations on repetitive things and concepts. It is based on the comprehensive achievements of scientific, technical and practical experience, approved by the competent authority, and published in a specific form as a guideline and basis for common compliance. The standards implemented by my country's steel products include national standards (GB, GB/T), industry standards (YB), local standards and enterprise standards. Technical conditions The performance indicators and quality requirements that the product should meet in the standard are called technical conditions, such as chemical composition, appearance dimensions, surface quality, physical properties, mechanical properties, process properties, internal organization, delivery status, etc.

Guarantee conditions

According to the technical conditions of metal materials, the manufacturer should conduct inspections and ensure that the inspection results meet the specified requirements of performance, chemical composition, internal organization and other quality indicators, which are called guarantee conditions.

Quality Certificate

The production of metal materials is carried out in accordance with unified standards, and the product factory inspection system is implemented. Unqualified metal materials are not allowed to be delivered. For metal materials delivered, the manufacturer provides a certificate of quality to ensure its quality. The quality certificate of metal materials not only states the name, specifications, number of deliveries, weight, etc. of the material, but also provides all inspection results for the specified guarantee items. Cleaning and Maintenance of Steel

1, Fireproof Treatment

The temperature resistance of steel is poor, and many of its properties change with the increase and decrease of temperature. When the temperature reaches between 430-540℃, the yield point, tensile strength and elastic modulus of steel will drop sharply and lose its load-bearing capacity. Refractory materials must be used to perform necessary maintenance on the steel structure. Fire-retardant paint or fire-retardant paint has not been used before. The fire resistance of a building depends on the fire resistance of the building components. When a fire occurs, its load-bearing capacity should last for a certain period of time, so that people can safely evacuate, rescue materials and extinguish fires. The fire protection measures are: Therefore, the exposed steel components are brushed with fireproof coating. The specific requirements are: the fire resistance time of the steel beam is 1.5h and the fire resistance time of the steel column is 2.5h, so that it meets the requirements of the building code.

2. Anti-corrosion treatment

In the past, only two anti-rust paint were sprayed (brushed) for exposed steel, and regular maintenance measures were lacking when used, so this practice was not effective. The floor bearing plate is galvanized, and the effect is not ideal. In view of this specific situation, specific maintenance measures have been formulated: steel structures such as steel beams, steel columns and purlins: sandblasting combined with electric steel brush rust removal technology is used to completely remove the previous rust and rust and perform anti-corrosion treatment.

3. After maintenance, the corrosion resistance of the steel structure is significantly improved. After one year of use, the anti-corrosion layer of the steel structure is intact, without any peeling or falling off, and the anti-corrosion effect is better. After applying fire-resistant coating, the overall fire resistance time of the steel structure is improved, ensuring the overall safety of the steel structure.