I do not know if you have found that when the installation of the smoke exhaust duct is completed, a layer of material will be wrapped around the smoke exhaust duct, so what is this layer of material? What does it do?

First of all, we must understand the main role of the fire exhaust duct. In the event of a fire, the smoke exhaust duct can quickly exhaust the smoke and harmful gases from the building to ensure the safe evacuation of personnel. However, if the fire exhaust duct itself is not fire-resistant, it is easy to become a medium for fire spread, posing a threat to the safety of the building structure and personnel. Therefore, it is particularly important to carry out fire protection treatment on fire exhaust duct.

In fact, this layer of wrapping material is fireproof material. Specifically, this layer of packaging can play a role in heat insulation, fire prevention, and effectively prevent the spread of fire. When choosing fireproof materials, we usually consider their fire resistance, heat insulation, environmental performance and installation and maintenance convenience and other aspects.

Because the fire smoke exhaust duct usually uses galvanized steel plate air duct as the main material, and this kind of air duct is not up to the relevant standards of the "Technical Standard for Building Smoke Control Smoke exhaust System", it will use fireproof materials for packaging treatment, so that it can meet the corresponding fire resistance requirements.

At present, there are mainly the following types of fire-proof packaging materials for fire exhaust ducts on the market:

1, fireproof glass wool: fireproof glass wool is a kind of inorganic fiber material, with good thermal insulation, heat insulation, fire performance. At the same time, the fireproof glass wool also has the advantages of antibacterial, mildew, sound-absorbing and sound insulation, etc., which is suitable for the fire prevention treatment of all kinds of fire exhaust ducts.

2, rock wool: rock wool and glass wool, the same as inorganic fiber material, has a high fire resistance and good thermal insulation, thermal insulation performance. In addition, rock wool also has the advantages of high compressive strength and tear resistance, and is also an ideal choice for fire protection treatment of fire exhaust duct.

3, fireproof board: fireproof board has a high fire resistance and good heat insulation performance, can effectively prevent the spread of fire. At the same time, the fire-proof board also has the advantages of anti-bacterial and anti-mold, high compressive strength, and is the preferred material for fire protection treatment of fire exhaust duct.

In addition to the above common fireproof materials, there are some new fireproof materials such as nano aerogel and finished fire-resistant composite duct, etc., which are gradually applied to the fire prevention treatment of fire exhaust duct, providing more options for the fire prevention treatment of fire exhaust duct.

The fire exhaust duct is wrapped with fire insulation material, the main purpose of which is to improve the fire resistance of the duct, make the smoke exhaust duct meet the requirements of the relevant regulations, and protect the normal operation of the fire protection system.