Assentech specialises in providing advanced Internal Floating Roofs (IFRs) designed to enhance the safety, efficiency, and environmental compliance of storage tanks. Our IFRs are engineered to minimise vapor losses, reduce emissions, and ensure long-term operational reliability.

What is Internal Floating Roof (IFR)

An Internal Floating Roof is a secondary roof installed inside a storage tank, floating directly on the surface of the stored liquid. This design significantly reduces the vapor space between the liquid and the fixed roof, thereby minimizing evaporation losses and emissions. IFRs are particularly effective in storing volatile organic compounds (VOCs) and other hazardous liquids, aligning with environmental regulations and safety standards.

1. Heavy Duty Aluminum Skin and Pontoon IFR

This robust design features a central frame supporting an aluminum deck and pontoons, providing exceptional structural integrity.

Key benefits include:

• Durability: Engineered to withstand high sloshing and turbulence, suitable for seismic zones.

• Maintenance-Friendly: Components like pontoons and seals can be replaced without dismantling the entire structure.

• Enhanced Safety: Equipped with heavy-duty shoe seals and anti-static features to prevent ignition risks.

2. Full Contact Honeycomb Panel IFR

This design ensures the roof remains in full contact with the liquid surface, eliminating vapor space beneath the roof.

Advantages include: 

• Emission Reduction: Minimizes vapor losses by eliminating the vapor space.

• Structural Strength: Honeycomb panels provide high load-bearing capacity.

• Ease of Installation: Modular panels allow for quick assembly and disassembly.

Rim Seals: Ensuring Optimal Sealing

Rim seals are critical components that seal the gap between the IFR and the tank wall, preventing vapor emissions.

Assentech offers:

• Shoe Seals: Liquid-mounted seals that provide superior sealing, especially in tanks with out-of-round conditions.

• Wiper Seals: Vapor-mounted seals that are easier to install but may have shorter service life.

Innovative Accessories

• Leg Boots: Designed to seal the space between the IFR’s support legs and sleeves, preventing emissions and corrosion.

Inspection and Maintenance Services

Assentech provides comprehensive inspection and maintenance services in accordance with EEMUA 159 and API 653 standards, ensuring your IFRs remain in optimal condition throughout their service life.