Square Rectangular Hot-DIP Galvanized (HDG) Steel Water Tank for Fire or Domestic. 70+ Year Service Life: Seamless press-molded design eliminates weld seams, preventing corrosion and extending lifespan over 70 years. Seismic Resistance: Certified to meet seismic intensity levels 6 through 9 degrees by Southeast University and China Southwest Institute. Hygienic Water Quality: Water contact surfaces use sanitary-grade SUS30408 stainless steel ensuring compliance with hygiene standards. 50% Faster Installation: Bolted assembly reduces construction time by approximately 50% compared to traditional welded tanks. 99% Energy Saving: No welding required during assembly, reducing power consumption by over 99% compared to welded tank construction. High Strength Rigidity: X-shaped structural ribs provide over three times the stiffness of simple convex surfaces using Q235 steel. Customizable Dimensions: Panel sizes and tank height can be customized to meet specific project requirements. Easy Maintenance: No internal tie rods allow safe personnel access for cleaning and inspection.