Ultimate fire protection: Fire retardant pipe jacket solution to bring lightweight, corrosion-free thermoplastic piping systems in essential applications onboard.

The demand for thermoplastic piping systems has grown considerably over the last few years. The lightweight, corrosion-free, and long-lasting alternative to traditional steel and metal piping systems is the ideal solution to increase the efficiency of cruise ships, merchant fleets, offshore platforms, and floating wind farms. Thanks to the newly developed Fire Retardant Pipe Jacket System HEAT-FIT, thermoplastic piping systems can be used for essential applications (L3) onboard.

HEAT-FIT Jacket System
Ultimate protection

HEAT-FIT is protecting thermoplastic piping systems from fire up to 1,000°C for 30 minutes under pressure (3 bar). Based on intumescent technology, the pipe jackets are designed to cope with the harshest marine environmental conditions. 

Ultimate compatibility

Compatible with the PE100 piping system ecoFIT and is designed for fast and straightforward new build and retrofit installations. No specilized skills required for jointing of inner pipe with electrofusion or butt fusion and manual installation of fire retardant jackets.

Ultimate safety

The HEAT-FIT Jacket material is water-based and is environmentally safe, even in the case of fire. Does not contain halogens, asbestos, or any other hazardous material and complies with the Green Ship Passport regulations (Hong Kong Convention).

Ultimate approval

HEAT-FIT meets the requirements of the International Maritime Organization (IMO) and is approved with ecoFIT/ELGEF for essential and non-essential applications. The Jacket System complies with IMO Resolutions A753 for fire endurance L3, MSC 399, and FTP code parts 5 and 2 related to surface flammability, smoke, and toxicity. Also, it is approved by ABS, BV, DNV, LR, and RINA.

The unique Pipe Jacket System HEAT-FIT copes with the strict fire resistance regulations of the International Maritime Organization (IMO) and makes thermoplastic piping systems resistant to temperatures around 1,000°C for at least 30 minutes under pressure. The Pipe Jackets are made of durable and flexible materials and can sustain highly demanding marine industry conditions.

Ultimate fire protection

Impact of plastic piping systems on industry challenges

Watch this video and learn why shipbuilders, shipowners, and operators should consider lightweight plastic piping systems for essential and non-essential applications onboard cruise ships, merchant vessels, and offshore work.

How the fire retardant pipe jacket system was developed

The HEAT-FIT Jacket solution provides ultimate fire protection for plastic piping systems onboard essential applications (L3). The road to the final product has taken more than six years of research, development, and testing.

Working principle of HEAT-FIT Jacket System

The HEAT-FIT material consists of three components. Watch this video to learn more about the different materials and technologies used to provide ultimate fire protection for your plastic piping systems in essential applications onboard.

L3 application possibilities for lightweight plastic piping systems

Corrosion-free plastic piping systems can finally be applied in essential applications (L3) like ballast water, ballast water treatment, fresh- and seawater cooling, or exhaust gas scrubbers. Watch the video to learn more about HEAT-FITs application possibilities and approvals.


HEAT-FIT Jacket Material

The HEAT-FIT Jacket system is highly insulating and strong, protecting the medium carrying inner pipe from fire by expanding when in contact with fire. 

  • Intumescent Coating protects the medium carrying PE piping system ecoFIT from fire by expanding and when in contact with fire.
  • Thermoplastic polyurethane (TPU) protects the high-temperature fiberglass fabric and the intumescent coating from the harsh environment at sea. 
  • High-temperature fiberglass is the carrier material of the highly resistant marine-proof system.
  • Speak to one of our experts to learn more about the HEAT-FIT material

Jointing Technologies

Combined with GF’s ecoFIT piping solution, the lightweight system is installed within minutes for years of operation. While the inner PE piping system is jointed with butt fusion or electrofusion, the HEAT-FIT jacket system is installed manually. For the installation of the total system, no specialized skills nor hot work are necessary. The long-established jointing technologies allow the highest reproducibility, reliable joints, and low thermal and mechanical stress during the installation process. In addition, the welds are trackable and recordable.



GF Piping Systems has been the global marine industry partner for over 30 years and supplies non-corrosive and lightweight thermoplastic piping systems. Thanks to the innovative fire retardant pipe jacket system HEAT-FIT, the range of applications of thermoplastic piping systems has been extended from non-essential to essential applications.

Application possibilities are in machinery spaces, pump rooms, cargo pump-rooms, RO/RO cargo holds accommodation services, and control spaces as well as open decks under the categories A, B, C, D, J, and K of the fire endurance matrix according to IMO A. 753 (18) regulations.

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Ballast System

Ballast water systems ensure safe operating conditions during voyages, help ships reduce stresses on the vessel's hull, and provide transverse stability. GF Piping Systems' maintenance-free solutions help to efficiently load, distribute, and unload ballast water from 0°C to 40°C, ensuring the ship can efficiently maneuver.

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Ballast Water Treatment

With the proper treatment of ballast water, the spread of invasive species via ballast water can be prevented. GF Piping Systems' lightweight plastic piping system ecoFIT can be used for efficient and maintenance-free ballast water treatment thanks to the fire retardant pipe jacket system HEAT-FIT. The system shows a unique chemical and temperature resistance and remains corrosion- and maintenance-free for 25 years. In combination with HEAT-FIT, the system can be installed to treat seawater ballast in machinery spaces, pump rooms, cargo pump-rooms, and cargo holds of the fire endurance matrix category A, B, C, and D.

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Freshwater and seawater cooling

The particular feature of an engine cooling system is continuous fluid flow, which requires the careful selection of piping materials: Corrosion- and erosion-free plastic piping systems help avoid corrosion, ensuring hassle-free operations of freshwater and seawater cooling in essential applications. Thanks to HEAT-FIT, cooling in essential service areas such as machinery spaces and pump rooms of the category A and B and accommodation service and control spaces and open decks of classes J and K according to the fire endurance matrix is now possible.

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Exhaust gas scrubber

For seawater scrubbing, an open-loop design using seawater is used. The exhaust gases are brought into contact with seawater to dissolve sulfur dioxides (SO2) in the exhaust gas. A very low pH is achieved during this process, and piping systems of the effluent lines are exposed to highly aggressive fluids. Therefore, the ultimate resistance of the piping system is of utmost importance to ensure a long system life without any downtimes. The PE100 piping system ecoFIT combined with HEAT-FIT can help you reduce the weight of your exhaust gas scrubber installation and reduce downtimes. 


Georg Fischer Piping Systems Ltd

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8201 Schaffhausen


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