Bilfinger Industrier Norge AS

Lambda F Box Polymer - Favuseal

Lambda F Box Polymer

Lambda F Box Polymer is an insulation system that provides fire protection for valves, flanges, actuators and other equipment.

The Lambda F Box Polymer is fully tested to meet the strictest on- and offshore specifications for oil and gas installations. This system is built up by insulation material and enclosed by stainless steel (AISI 316). The pieces are fastened with toggle clips in the same material and locked with security pins. The Lambda F Box Polymer can be equipped with a drain plug as required for top side installations per NORSOK standard and inspection hatch for easy access to the protected object.

The system has been tested successfully for blast overpressure up to 0,9 bar and jet fire with a heat load up to 350kW/m² (1350°C).

Polymer Based Jetfire Protection

Favuseal is a Polymer based passive fire protection material, which is halogen-free and does not generate corrosive gases, or toxic gases in a fire, thus protecting firefighting personnel and the surrounding environment. The Polymer material is combined with Favuseal X3M Aeorogel technology to achieve superior performance. 

The Bilfinger Lamba F Box Polymer with Favuseal has been extensively tested  and certified in jet- and hydrocarbon as well as explosion tests to IMO 2010 FTP Code Part 3, ISO 22899-Part 1 and OTI 95634.

Design and Test results

Lambda F Box Polymer with Favuseal are easily installed and are removable to allow for inspection and maintenance. The toggle clips allow for quick and easy installation without the use of tools. The stainless steel surface is maintenance free, and the inside is lined with Favuseal NKX-6174. In case of a fire, the Favuseal material reacts endothermically, releasing trapped vapour in the polymer, consuming energy to protect the object. In a second reaction at around 700°C the material forms a ceramic compound providing a fire and thermal barrier. The Favuseal material is Hydrophobic, thus providing protection against corrosion under insulation.

The Bilfinger Lambda F Box Polymer with Favuseal is tested with drain plug and inspection hatch meeting industry best practice design. The Lambda F Box Polymer has been tested and certified with a range of masses and dimensions, allowing interpolation to ensure optimal protection for each object.


ResultsTest standardTest Institute Certification
Up to 150 minutesIMO 2010 FTP Code Part 3SP Fire Research AS (Sintef)DNV GL
Over 60 minutesISO 22899-Part 1SP Fire Research AS (Sintef)DNV GL
Up to 47 minutesExtended OTI
95 634
SP Fire Research AS (Sintef)DNV GL
Up to 0.9 barExplosion TestsGexconDNV GL

15 Years actual