Fire Rated Duct Insulation Thickness

13 to 51mm tough airstream surface resists shop installation and service damage sheet metal ducts must be tightly sealed.

Fire rated duct insulation thickness.

400oc and as per the specification tendered is 2mm thickness. Duct liner secured to sheet metal with adhesives plus metal fasteners available in thicknesses from 1 2to 2 in. Fyrewrap elite 1 5 duct insulation is a single layer flexible duct wrap enclosure for 1 and 2 hour fire rated air distribution systems ads ducts. The penetration of the hanger fixings into any concrete soffit should be a minimum of 50mm for 120 minutes ratings or 65mm for 240 minutes ratings.

Typical duct types include smoke control hazardous exhaust laboratory chemical fume stairwell and vestibule pressurization ventilation supply return ducts commercial dryer exhaust as well as refuse and linen chutes. And i don t have a reference for the 2 mm. Because the blanket is adhered to the foil scrim it will resist wrapping and slumping. If these stress levels are exceeded then the size of the hanger rods must be increased or the centres of the hangers reduced or the hangers protected.

The duct manufactured shall be single skin in construction having total thickness not more than 2mm thick including intumescent coating as tested. 3m fire barrier duct wrap 615 is the only fire rated duct wrap product you ll need to help protect grease and air ducts. The 3 standards are european standards en british standards bs and american standards astm. In the global market there are 3 commonly used standards to define the fire resistance of ductwork also known as fire rated ductwork.

Incidentally all duct insulation within a building interior should be 25 50 flame smoke rated regardless of whether the space above the ceiling acts as a return air plenum or not. The construction of ductwork shall be rectangular flat oval or round in shape to reduce the limited height and weight of the duct. Our 3m fire barrier duct wrap 615 pdf 332 91 kb is a fire rated duct wrap consisting of an inorganic fiber blanket encapsulated with a scrim reinforced foil. Figure 3 shows an application of factory jacketed pipe insulation that is a 25 50 flame smoke rated material.

Lightweight thin and low profile protection. In the middle east region the most commonly accepted standard is the british standard bs476. The story is that the contractor is claiming that a 1 2mm thickness ducts is sufficient to consider it fire rated for specified duration and temp. It is flexible and lightweight for easy installation and passes the necessary fire tests to achieve two hour fire resistance requirements.

Mechanical applications and non combustibility.