The quality of steel structure projects is directly linked to the safety and service life of the building, serving as a core reflection of an enterprise's competitiveness.
Quality control begins at the source, with raw material procurement being the top priority. The company strictly adheres to the GB/T 1591-2018 standard, selecting premium carbon structural steels and low-alloy high-strength steels such as Q355B and Q235B. Before entering the facility, all raw materials must be accompanied by original mill test certificates. Furthermore, third-party testing agencies conduct sampling inspections for mechanical properties and chemical composition, verifying core indicators like yield strength and tensile strength. This rigorous process prevents substandard materials from entering production, laying a solid foundation for project quality from the very beginning.
During the production phase, leveraging a 60-mu scaled production base and a mature production line with an annual capacity of 30,000 tons, the company introduces advanced equipment such as CNC plasma cutters, H-beam assembly machines, and submerged arc automatic welding machines. Full-process standardized and refined control is implemented. Each procedure follows clear work instructions: cutting errors are controlled within ±1mm; welding utilizes processes like submerged arc welding and gas shielded welding, with welds undergoing non-destructive testing (UT and MT - Magnetic Particle Testing) to ensure 100% compliance; and component derusting employs sandblasting techniques to achieve a grade of Sa2.5 or higher, laying the groundwork for subsequent anti-corrosion treatment and enhancing the steel structure's corrosion resistance.
In the on-site installation stage, the company assembles construction teams with professional qualifications to operate in strict accordance with GB 50205-2020 ("Standard for Acceptance of Construction Quality of Steel Structures"). Key links such as component positioning, node connection, and bolt tightening are tightly controlled. Total stations are used for precise positioning, and bolt tightening torques are verified with professional tools to ensure they meet design requirements. Simultaneously, attention is paid to detailed construction control, implementing measures for high-altitude operation protection and component lifting reinforcement. This approach not only guarantees construction safety but also ensures installation quality meets standards.
Quality assurance extends beyond completion. The company maintains a comprehensive after-sales service system, adhering to the service standard of "regular inspections, timely response, and rapid resolution." After project completion, technical personnel conduct inspections every six months to check the steel structure's anti-corrosion layer, node connections, and bolt tightness, establishing detailed inspection archives. For any issues encountered by clients during use, the company responds within 24 hours and dispatches personnel to the site for resolution within 48 hours, safeguarding client rights.
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