Fire Rated Duct Insulation Thickness

Because the blanket is adhered to the foil scrim it will resist wrapping and slumping.

Fire rated duct insulation thickness.

In the global market there are 3 commonly used standards to define the fire resistance of ductwork also known as fire rated ductwork. In the middle east region the most commonly accepted standard is the british standard bs476. The company s primary principle is based on offering its customers certified and high quality products delivering them within stipulated time and adhering to the best quality standards. 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.

Mechanical applications and non combustibility. Lightweight thin and low profile protection. The construction of ductwork shall be rectangular flat oval or round in shape to reduce the limited height and weight of the duct. 13 to 51mm tough airstream surface resists shop installation and service damage sheet metal ducts must be tightly sealed.

Duct liner secured to sheet metal with adhesives plus metal fasteners available in thicknesses from 1 2to 2 in. It is flexible and lightweight for easy installation and passes the necessary fire tests to achieve two hour fire resistance requirements. 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. The duct manufactured shall be single skin in construction having total thickness not more than 2mm thick including intumescent coating as tested.

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 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. 3m fire barrier duct wrap 615 is manufactured with a man made vitreous spun. Figure 3 shows an application of factory jacketed pipe insulation that is a 25 50 flame smoke rated material.

The 3 standards are european standards en british standards bs and american standards astm. 3m fire barrier duct wrap 615 is the only fire rated duct wrap product you ll need to help protect grease and air ducts. 400oc and as per the specification tendered is 2mm thickness. 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.

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.