Fire door fire resistance rating test method and five points of the fire door
At present domestic fire door according to the requirements and specifications are divided into: single fan and double fan, fan with glass, double glass, single with bright window, double with bright window, single with glass with bright window, double take glass with bright window of eight varieties. Among them, the most representative is take glass or take bright fire door window, its basic structure is: door frame made of steel (cold rolled or galvanized, etc.), door leaf sides panel for steel (cold rolled or galvanized, etc.), part of the fire door two panels inside is lined with inorganic non-combustible fire prevention board, to strengthen the doors of cold-rolled steel plate, stiffener and connection with spot welding panel, door leaf filled inside insulation (different density of aluminum silicate fiber cotton, rock wool, etc.). Doors with glass and bright Windows are made with refractory performance level of the same fire glass door, door frame slot and the door leaf raphe installs sealing materials (fire expansion sealing strip, aluminum silicate fiber blanket, etc.).
Also install different fire lock, hinge, door closers, order, release, pin, etc. All the hardware products with must be through the national fixed fire extinguishing test center testing qualified products.
The most important factor in choosing fire door is the fire resistance of fire doors. Fire endurance test method has two kinds: one is the fire shutter, in accordance with the existing national standard GB7633 fire test method of the doors and rolling fire-proof experiment was carried out, including back fire surface temperature rise, the decision condition decision; Two is also carried out in accordance with the GB7633 fire test, according to the standard of no thermal insulation layer of iron shutter free back fire surface temperature rise measurement rules and product standard of the steel fire shutter general technical conditions "(GB14102-93), only to face a certain distance from the back fire of radiant heat intensity and shade to determine whether to wear fire shutter shade of refractory limit. According to not include back fire surface temperature rise as refractory limit determination conditions of heat insulation fire shutter, the fireproof limit data, including than back fire surface temperature rise as refractory limit determination conditions the fire resistance of insulation type fire shutter is much longer.
Fire door quality about our personal and property safety, so how to choose and buy to the formal quality reliable fire door?
1, check the appearance, high quality steel fire door welding firmly, solder joint distribution uniformity; The surface coating level off is smooth. High quality of the surface of the wood fire door should be bare or sanding; No plane marks, burr and hammer marks; Cutting Angle, flat-fell seam should be sealed is flat and level. Qualified steel door and wooden door in the specified location should have product marks, quality inspection and quality certification (recognition) qualified marks.
2, the number, dimension of qualified products shall be the sample description of appearance size, the thickness of the door leaf samples should be described in the door leaf thickness, doorframe wall width should be described in the sample frame wall width, flameproof glass shape sample size should be described in the flameproof glass appearance size, fire glass thickness should be flameproof glass thickness of sample description.
3, estimated weight, the quality qualified fire door generally heavier, and the very light of the fire door is definitely and inferior quality products.
4, check the certificate, fire door is included in the product type approval system, products need to be before sales pattern examination, general type test reports are described in detail in the sample of the specifications of the size, composition, material and product photos, etc., in the actual purchase, to the factory for type test report.
5, pay attention to the fire door filling materials, according to the regulation of GB12955-2008, qualified fire door brand products, the filler material shall be the non-toxic harmless to the human body fire insulation materials, and approved by the national testing agencies authorized by the inspection to the combustion performance GB8624-2005 A1 level requirements and GB/produce smoke toxicity T20285-2006 dangerous class ZA2 requirements. Fire door filler material in fire door play a major role in refractory and heat insulation performance, so the filling material is the key of the fire door engineering inspection and acceptance of the project.
