Fire Rated Duct Insulation Thickness

Delta duct air conditioning is one of the prominent fire rated ac duct coating and duct accessories manufacturers in the uae.

Fire rated duct insulation thickness.

The construction of ductwork shall be rectangular flat oval or round in shape to reduce the limited height and weight of the duct. The 3 standards are european standards en british standards bs and american standards astm. Mechanical applications and non combustibility. Duct liner secured to sheet metal with adhesives plus metal fasteners available in thicknesses from 1 2to 2 in.

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. 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. 400oc and as per the specification tendered is 2mm thickness. Figure 3 shows an application of factory jacketed pipe insulation that is a 25 50 flame smoke rated material.

13 to 51mm tough airstream surface resists shop installation and service damage sheet metal ducts must be tightly sealed. In the global market there are 3 commonly used standards to define the fire resistance of ductwork also known as fire rated ductwork. 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. 3m fire barrier duct wrap 615 is the only fire rated duct wrap product you ll need to help protect grease and air ducts.

3m fire barrier duct wrap 615 is manufactured with a man made vitreous spun. Lightweight thin and low profile protection. The duct manufactured shall be single skin in construction having total thickness not more than 2mm thick including intumescent coating as tested. 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 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. Because the blanket is adhered to the foil scrim it will resist wrapping and slumping. In the middle east region the most commonly accepted standard is the british standard bs476. And i don t have a reference for the 2 mm.

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.