In September last year, USNS William McLean was the twelfth of fourteen new cargo ships to be delivered to the US Navy. The ships are in effect ‘floating superstores’ which transport everything from ice cream to ammunition.
Complex challenges for the technical insulation
The onboard mechanical systems are as diverse as the cargo itself. Apart from the HVAC systems for the crew, the ships also have large refrigeration and freezer units for storing the foodstuffs. When selecting the insulation materials, not only the diverse operating temperatures had to be taken into account, but also the regulatory requirements of the US Navy, which stipulate that the construction materials used must have low flame spread and low smoke gas and toxic emissions.
Halogen-free insulation with NH/Armaflex
The insulation specialists Performance Contracting Inc. (PCI) of San Diego (California) were commissioned to specify and install the technical insulation materials. PCI specified mainly NH/Armaflex, the proven elastomeric insulation material for particularly high safety requirements. The product does not contain chlorides, bromides or PVC. It has low smoke gas emissions and displays good practical fire behaviour. NH/Armaflex is FM- and ULapproved, IMO-certified and fulfils the strict requirements of the US Navy’s EB 4013 specification.
Quick and easy to install
Apart from their good technical properties, Armaflex insulation materials are characterized by their unrivalled ease of installation, which is an enormous benefit particularly in tight spots. Installation is even faster with self-adhesive materials. Using the self-adhesive NH/Armaflex sheets enables PCI to stay within the narrow timeslot for insulation work in the building schedule. PCI now uses mainly NH/Armaflex for mechanical installations in many projects as a system with the Armafix NH pipe hanger.