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Internal Floating Roofs (IFR)

Effective reduction of product vapor emissions in fixed-roof tanks.

Emission Reduction and Product Protection

Internal Floating Roofs (IFR) are specialized structures installed inside fixed-roof storage tanks. Their main purpose is to significantly reduce product losses from evaporation and to cut Volatile Organic Compound (VOC) emissions to the atmosphere, often by more than 95%.

An IFR floats on the surface of the stored liquid, creating a barrier that separates the product surface from the gas space under the fixed roof. This minimizes the evaporation surface and prevents the formation of flammable vapor-air mixtures.

Techcom Serwis supplies IFRs made of steel or aluminum, designed and manufactured in accordance with API 650 Appendix H and EN 14015 Appendix C standards. We guarantee the highest quality of workmanship and compliance with safety requirements.

Internal floating roof in a tank

Main Benefits of Using IFRs:

  • Drastic Reduction of VOC Emissions: Reduction of product vapor emissions by over 95%, which allows meeting strict environmental standards (e.g., BAT).
  • Minimization of Product Losses: Limiting the loss of valuable product through evaporation.
  • Increased Safety: Elimination of the vapor-saturated gas space above the liquid surface, which reduces the risk of fire or explosion.
  • Protection of Product Quality: Preventing contact of the product with air and moisture under the fixed roof.
  • Relatively Low Modernization Cost: An effective way to significantly reduce emissions in existing fixed-roof tanks.

Types of Internal Floating Roofs

We offer different types of IFR structures, selected depending on the tank diameter, product type, and specific Client requirements:

Pontoon Type IFR

A structure consisting of a central membrane (deck) and peripheral pontoons that provide buoyancy. These are popular and proven solutions, available in steel and aluminum versions. They can be non-contact (with a gas space under the deck) or contact (adhering to the liquid surface).

Full Contact IFR

Usually made of aluminum in a honeycomb or sandwich panel structure. This type of roof completely adheres to the liquid surface, eliminating the vapor space under the roof and ensuring the highest emission reduction efficiency. They are characterized by a low profile and high strength.

Construction Materials:

  • Aluminum: Lightweight, corrosion-resistant, easy to install, ideal for many petroleum products and chemicals.
  • Stainless / Carbon Steel: Used in cases requiring greater chemical resistance or in specific process conditions.

All our IFRs are equipped with appropriate rim seal systems (see Tank Seals.

Technical Specifications and Standards

  • Main Design Standards: API Standard 650 Appendix H, EN 14015 Appendix C.
  • Construction Materials: Aluminum alloys, stainless steel (304, 316), carbon steel.
  • Construction Types: Pontoon (non-contact, contact), Full Contact (honeycomb, sandwich panels).
  • Rim Seals: Wiper, foam, rubber/plastic (see Seals page). Materials selected for the product, ensuring anti-static properties.
  • Supports: Adjustable supports allowing the roof to be set at the required working and maintenance height.
  • Fittings: Vents, manholes, grounding connections, guides, anti-rotation systems.
  • ATEX Compliance: The design and materials ensure safety in hazardous areas.

FAQ - Internal Floating Roofs

Internal floating roofs are used in storage tanks with a fixed roof (cone or dome) that are used to store volatile products such as gasoline, solvents, alcohols, or some chemicals. They are not used in tanks with an external floating roof (EFR).

Both types have their advantages. Full contact roofs typically offer the highest emission reduction efficiency by completely eliminating the vapor space under the roof. However, they are often more expensive. Pontoon roofs are a proven and more economical solution that also provides very high emission reduction. The choice depends on the product specifics, emission requirements, and budget.

The installation of an IFR takes place inside an emptied and prepared tank. The roof components are usually delivered in parts and assembled on site by specialized teams. Thanks to the lightweight construction (especially in the case of aluminum), the installation is relatively quick. However, it requires special safety measures (work in a confined space).

Reduce Emissions and Product Losses with IFR from Techcom Serwis

Contact us to discuss the use of an internal floating roof in your tanks and receive an offer.

Request a Quote for an IFR