How to prevent corrosion during DX52D construction?
A: ① Stacking: Elevated + moisture-proof, avoid ground contact; ② Transportation: Cover with tarpaulin to prevent rain and rust; ③ Installation: Seal joints promptly, and apply zinc-rich paint to exposed cuts/welds within 24 hours.
What are the installation spacing requirements for DX52D profiled sheets?
A: Roof panels: Purlin spacing ≤ 1.5m (0.6mm sheet), ≤ 2.0m (0.8mm sheet); Wall panels: Keel spacing ≤ 1.2m; Verify according to design to prevent excessive deflection.
What are the sealing requirements for DX52D ducts?
A: According to GB 50243, air leakage for medium and low pressure systems ≤ 2.0m³/(h·m²), for high pressure systems ≤ 0.5m³/(h·m²); Use sealant/sealing strips at joints, and add gaskets for flange connections.
What are the key points for accepting DX52D components? A: ① Appearance: Uniform zinc plating, no missed plating/peeling/scratches; ② Thickness: Spot check with a thickness gauge, deviation ±0.02mm; ③ Zinc plating: Weighing method/magnetic thickness measurement according to EN 10346; ④ Forming: No cracks when bent, dimensional deviations meet specifications.
Repair and refurbishment methods for DX52D?
A: ① Small area corrosion: Grinding to remove rust → Applying zinc-rich primer → Topcoat; ② Large area/perforation: Replace components; ③ Regularly clean dust/corrosive media; check zinc plating thickness every 2-3 years in coastal areas.