Test set-up

The Jet-Fire Resistance Test Method describes the dimensions and geometry of the test specimen, jet nozzle and gas delivery system, and the distances and measures of the complete test set-up.

The tubular specimens are fixed in front of a 1500x1500mm and 500mm deep steel box (front open, steel rear wall) called the "front box". The plate thickness of the box is 10 mm overall. The "front box" is bolted to a 1500x1500mm and 1000mm deep steel box (both ends are open) called the "rear box" for stability purposes only. The "rear box" and "front box" are placed on a base of aerated concrete blocks 1000mm above the floor. The external sides and roof of the "front box" is covered with aerated concrete blocks.

The rear steel wall of the steel front box is insulated with 2x25mm ceramic fiber blankets on the unexposed side.

The fire source is an impinging propane jet. The gas delivery system and jet-fire rig consist of a storage tank containing approximately 24500 kg of liquid propane, evaporator with a capacity of 4000 kg/h at 15 bar, flexible tubes, steel piping, valves and the jet nozzle.

The fuel is commercial propane, delivered as vapour, without a liquid fraction at a steady rate of 0.30 +-0.05 kg/s.

Please mail or call SINTEF NBL for more info.