Pressed Steel HDG Sectional Tanks

Overview

Pressed steel HDG (hot dipped galvalnised) sectional tanks are engineered for robustness, longevity, and versatility, making them ideal for storing potable and non-potable water. Their design and construction are focused on providing high structural integrity, excellent corrosion resistance, and ease of assembly and maintenance.

Technical and Engineering Details

1. Material Specifications

   • Steel Grade: The panels are typically made from S235JR steel or equivalent, known for its excellent weldability and good machinability.
   • Galvanization: The steel panels undergo a hot-dip galvanizing process, where they are immersed in molten zinc at approximately 450°C (842°F), forming a zinc-iron alloy layer on the surface. This results in a zinc coating thickness of about 85 microns, providing long-lasting corrosion protection.

2. Panel Design and Manufacturing

   • Panel Thickness: Standard panel thickness ranges from 3mm to 6mm, with options available depending on the required tank size and application.
   • Pressed Profile: The panels feature a pressed profile design, enhancing their structural strength and rigidity. This profile is achieved through precision pressing techniques, ensuring uniformity and consistency across all panels.
   • Modular Construction: The modular design allows for customization in size and capacity, facilitating easy transportation and on-site assembly.

3. Structural Components

   • Support Framework: The tank structure is supported by a combination of vertical and horizontal steel reinforcement. The support framework includes angle sections and channels, typically galvanized to the same standards as the panels.
   • Base Structure: A reinforced concrete foundation or steel base is prepared to support the tank, ensuring it can bear the weight of the tank when filled.

4. Jointing System

   • Bolted Assembly: The panels are connected using hot-dip galvanized bolts, nuts, and washers. The bolt holes are precision-drilled to ensure accurate alignment and tightness.
   • Gasket Sealing: Neoprene rubber gaskets are used at the joints to ensure watertight seals. These gaskets are resistant to weathering, ozone, and a wide range of chemicals, ensuring long-term durability and leak prevention.

5. Internal and External Coatings

   • Internal Coating: For potable water storage, an optional food-grade epoxy or bitumen coating can be applied to the interior surfaces to prevent any contamination.
   • External Coating: Additional protective coatings, such as epoxy or polyurethane, can be applied externally for enhanced corrosion resistance in harsh environments.

6. Hydrostatic Testing

   • Leak Testing: After assembly, the tank undergoes rigorous hydrostatic testing to check for leaks and ensure structural integrity. The tank is filled with water and monitored over a specified period to confirm that there are no leaks or pressure drops.

7. Design Standards and Compliance

   • BS 1564: The tanks are designed and manufactured in accordance with British Standard BS 1564, ensuring high-quality construction and performance.
   • ISO 9001: Manufacturing processes adhere to ISO 9001 quality management standards, guaranteeing consistent quality and reliability.
   • AWWA D103: For potable water storage, the design can also comply with the American Water Works Association (AWWA) D103 standards.

8. Optional Features and Accessories

   • Manholes: Access manholes with lockable covers for inspection and maintenance.
   • Ladders: Internal and external ladders made from galvanized steel or stainless steel for safe access.
   • Roof Structures: Flat or pitched roof options with galvanized steel or aluminum sheets, including venting provisions to prevent vacuum formation.
   • Overflow and Drainage: Overflow and drainage pipes with anti-vortex plates and strainers to manage water levels and facilitate cleaning.
   • Insulation: Thermal insulation for applications where temperature control is necessary, such as in cold climates or for specific industrial processes.

Installation Process

1. Site Preparation:

   • Foundation: Prepare a stable, level concrete base or steel frame foundation, designed to support the full load of the tank when filled. The foundation design should consider soil bearing capacity, seismic activity, and other site-specific conditions.

2. Panel Assembly:

   • Base Panels: Start with the base panels, aligning them accurately and securing them to the foundation.
   • Side Panels: Sequentially bolt the side panels, ensuring the neoprene gaskets are correctly positioned to form watertight seals.
   • Vertical and Horizontal Bracing: Install the internal and external bracing to provide additional structural support and stability.

3. Roof and Accessories:

   • Roof Panels: Assemble the roof panels, if applicable, ensuring they are securely fixed and watertight.
   • Ladders and Manholes: Install access ladders and manholes for inspection and maintenance purposes.

4. Inspection and Testing:

   • Visual Inspection: Conduct a thorough visual inspection of all joints, gaskets, and structural components.
   • Hydrostatic Testing: Fill the tank with water and monitor for leaks or pressure drops over a specified period, ensuring compliance with design specifications.

Maintenance and Longevity

• Regular Inspections: Conduct periodic inspections to check for signs of corrosion, gasket wear, and structural integrity.
• Cleaning: Schedule routine cleaning to prevent sediment buildup and ensure water quality, especially for potable water storage.
• Panel Replacement: If any panels or components show signs of damage or significant wear, they can be individually replaced without the need to dismantle the entire tank.

Conclusion

Pressed steel HDG sectional tanks from Global Tankcom Sdn Bhd offer a reliable, durable, and customizable solution for a wide range of water storage needs. Their robust construction, corrosion resistance, and ease of installation and maintenance make them an ideal choice for industrial, commercial, and municipal applications. Trust Global Tankcom Sdn Bhd to provide high-quality tanks engineered to meet your specific requirements, ensuring long-term performance and reliability.