HEAT-FIT, fireproof piping system approved by DNV, BV, ABS and LR

HEAT-FIT fire test

Posted on August 5, 2022 at 9:10 a.m. by

The Maritime Executive

HEAT-FIT is designed to bring lightweight, corrosion-free, and efficient thermoplastic piping systems to critical shipboard applications. Today, the flame retardant pipe jacket system has been approved by no less than four of the marine industry’s leading certification companies, DNV, Bureau Veritas, ABS and Lloyds Register. As a result, GF Piping Systems offers complete solutions that can be implemented throughout the vessel and make the maritime industry more sustainable.


The greenhouse gas (GHG) strategy of the International Maritime Organization (IMO) is very clear: compared to 2008, the carbon intensity of international maritime transport must be reduced by 40% by 2030 and by 50% by 2050. To meet these targets, shipbuilders and shipowners are increasingly turning to thermoplastic piping systems as a solution – their low weight and corrosion resistance make them a durable and more cost effective than metal piping systems. However, particularly high safety standards in L3 applications on board, including engine cooling, ballast or ballast water treatment, meant that thermoplastics could not be implemented throughout the vessel. . With DNV, BV, ABS and LR approvals, HEAT-FIT is now introducing thermoplastic piping systems into L3 applications on cruise ships, merchant ships and offshore energy platforms.


An innovative flame retardant pipe jacket system


HEAT-FIT from GF Piping Systems is compatible with the ecoFIT range of polyethylene pipes and fittings designed for fresh and marine water applications, as well as water and waste water treatment. The new hose jacket system is comprised of two layers of TPU with a scratch and stain resistant exterior finish. Between these layers of TPU, HEAT-FIT encloses a high temperature fiberglass fabric as well as an intumescent coating. Together, these proven materials protect ecoFIT pipes and fittings against fire up to a temperature of 1000°C for 30 minutes at a pressure of 3 bar. At the same time, HEAT-FIT is only 3.5 millimeters thick and can therefore be quickly and easily installed in new builds or retrofitted to existing vessels without having to modify the piping system.


During its development phase, HEAT-FIT was subjected to a wide range of tests to ensure safe and reliable operation. These included the fire resistance of pipe sleeves and accessories such as pipe supports and flanges in accordance with IMO Res. A753 Fire resistance Code L3. HEAT-FIT has also been tested for surface flammability, smoke and toxicity in accordance with IMO A653 2010 FTP Code Parts 5 and 2. In addition, components have been tested for seawater tightness, water contaminated with diesel fuel and salt water.


“We are very pleased to have received confirmation from DNV, Bureau Veritas, ABS and Lloyds Register that HEAT-FIT has been cleared for marine applications,” comments Roberto Chiesa, Business Development Manager at GF Piping Systems. “By introducing a flame retardant pipe jacket system, we have opened the door to the use of thermoplastics in additional applications on ships and offshore energy platforms. Our complete solutions simplify the planning and installation process. Currently, the company is awaiting further approvals by RINA.


Towards a more sustainable maritime industry


Traditionally, many pipes on ships were made of steel or metal. The disadvantages of these materials are their high weight and their susceptibility to corrosion. “Plastic pipes, on the other hand, are a win-win solution for the maritime industry”, explains Roberto Chiesa. “Due to their material properties, they are not only cheaper to install and maintain, but they also make ships more energy efficient.” To prove these claims, GF Piping Systems conducted a study in 2021 that compared the use of pre-insulated polyethylene pipes with a post-insulated steel system on a simulated 150,000 GT cruise ship. As part of an air conditioning cooled water system, COOL-FIT, the company’s plastic alternative, has improved fuel mileage, reduced emissions and lowered costs. “After 30 years in the maritime industry, we are very aware that we must protect our oceans and our climate in order to move forward. I believe that plastic piping systems as part of a holistic strategy can play an important role in achieving these goals,” adds Chiesa.

The products and services described in this press release are not endorsed by The Maritime Executive.