Products

GRP Tanks: Lightweight Strength and Superior Corrosion Resistance

Steel Sectional Tanks: Scalability, Robustness, and Field Assembly

Construction and Materials
Our GRP Tanks are fabricated using advanced filament-winding and hand-layup techniques, combining glass fiber reinforcement with high-quality polyester or vinyl ester resin. The composite laminate structure consists of multiple precisely controlled layers:

• Primary Laminate (Structural Core): Multiple plies of E-glass fiber oriented in cross-woven and chopped strand mat formations for exceptional tensile strength.

• Barrier Coat: A corrosion-resistant resin layer vanquishes chemical attack from aggressive fluids (e.g., wastewater, chemicals, brine), ensuring long-term service life.

• Gelcoat Finish: An outer UV-stabilized gelcoat provides a smooth, impermeable surface that resists weathering, microbial growth, and abrasion.

Key Features & Benefits

1. Lightweight Yet Robust: GRP Tanks weigh up to 70% less than steel alternatives of equal capacity, facilitating easier handling, transportation, and installation—especially in rooftop or remote locations where heavy lifting equipment is limited.

2. Corrosion-Proof Design: Unlike metal tanks that rust, pit, or require internal coatings, GRP’s chemically inert nature ensures zero corrosion, even when storing chlorinated water, acids, or industrial effluents. The barrier coat guarantees leak-free performance over decades.

3. Seamless, Monolithic Construction: Each GRP Tank is manufactured as a single-piece shell (or with a minimal number of bonded joints), eliminating weld seams that could develop stress cracks or corrosion over time. This seamless integrity translates to 100% leak resistance.

4. Standards Compliance: Petratanks’ GRP Tanks adhere to international standards—including BS EN 13121, BS 4994, and ISO 9001 quality management—validating rigorous testing for hydrostatic pressure, impact resistance, and dimensional accuracy.

5. Thermal Insulation & Noise Dampening: The composite laminate exhibits a low thermal conductivity, reducing heat exchange with the environment and minimizing condensation. Additionally, GRP’s dampening properties reduce noise from fluid turbulence, making it ideal for indoor or rooftop installations.

6. Customization & Versatility: Available capacities range from 1,000 liters to over 50,000 liters. Standard shapes include cylindrical vertical, cylindrical horizontal, and rectangular configurations. Optional accessories include manways, ventilation vents, inlet/outlet flanges, level indicators, and anti-vortex devices.

Applications

• Potable Water Storage: Food-grade resin and FDA-approved gelcoats ensure hygienic storage for drinking water.

• Rainwater Harvesting: Durable, UV-resistant GRP Tanks capture and store rainwater for landscape irrigation, toilet flushing, or boiler feedwater.

• Wastewater & Septic Tanks: Corrosion-resistant chemistry and custom compartmentalization make GRP ideal for primary treatment tanks, lift stations, and septic systems.

• Chemical & Industrial Containment: For storage of acids, alkalis, solvents, and process water—our GRP Tanks maintain chemical integrity without interior liners or coatings.

Construction and Design
Steel Sectional Tanks from Petratanks are manufactured in precision-engineered, modular panels of high-strength, hot-dip galvanized steel (minimum Z275 galvanization). Each panel is cut, rolled, and factory-laminated to ensure perfect dimensional tolerances. Once on-site, panels are bolted together using stainless-steel fasteners and sealed with FDA-approved butyl rubber gaskets, creating a fully welded-like, leak-proof joint without the need for field welding.

Key Features & Benefits

1. Modular Scalability: Panels can be arranged in various configurations—rectangular, square, or custom geometries—allowing architects and engineers to optimize footprint and capacity. Expansion is as simple as adding extra panels to existing walls.

2. Rapid On-Site Assembly: Without heavy welding equipment, a trained crew can assemble a 100,000-liter sectional tank in just a few days. Bolted connections and gasket seals ensure quick, accurate installation even in constrained spaces.

3. Exceptional Structural Strength: The galvanized steel panels boast high compressive strength, resisting soil pressure when partially or fully buried. External stiffeners and internal bracing kits (gussets, struts) are available to withstand seismic loads or high hydrostatic head.

4. Longevity and Maintenance: Galvanization provides a protective zinc layer that prevents corrosion for up to 50 years, depending on environmental conditions. Panels can be easily replaced if damage occurs, avoiding the need to decommission the entire tank.

5. Wide Range of Capacities and Configurations: Capacities range from 5,000 liters to over 1,000,000 liters. Tanks can be roofed with a variety of materials—aluminum, GRP, or steel—to protect contents from contamination, UV exposure, or temperature fluctuations.

6. Cost-Effective Lifecycle: Initial capital cost is competitive compared to welded steel reservoirs. Over the tank’s life, minimal maintenance (occasional gasket replacement, external painting if desired) and repairable modular panels reduce total cost of ownership.

Applications

• Fire Water Storage: Local fire code requirements often demand large volumes of water be stored for emergency use. Sectional tanks provide reliable firewater reserves, complete with NFPA-compliant roof options and hydrant fittings.

• Industrial Process Water: Precision-manufactured panels ensure a smooth interior finish that resists biofilm growth, making them suitable for process water or cooling tower basins.

• Municipal Water Treatment: Sectional tanks can be configured as clarifiers, equalization basins, or clear wells in water treatment plants. Internally coated surfaces (epoxy or vinyl ester) allow for potable water applications.

• Agricultural & Livestock Use: Feedlot water storage, dairy washdown basins, and nutrient solution tanks for hydroponics benefit from the corrosion-resistant galvanized finish and easy cleanability.