According to the relevant standards of the "Technical Standards for Building Smoke Prevention and Exhaust System", the fire duct should meet the requirements of different fire resistance limits such as 0.5, 1, 2 hours. At present, most of the fire ducts use metal air ducts, which can not meet the relevant standards, so the fire protection package practice came into being. Below, Xiaobian will explain to you the fire resistance time of the air duct for 1 hour.

1. Preliminary preparation

Before fireproof wrapping, a thorough inspection and cleaning of the air duct is required. Ensure that the surface of the air duct is free of impurities such as oil and dust to ensure the adhesion effect of fireproof materials. At the same time, prepare the required fireproof materials and tools, such as 60-unit weight 50mm thick glass wool board, aluminum foil tape, cutting tools, insulation nails, etc.

Second, fireproof package steps

1, measurement and cutting: according to the size of the air duct, measure and cut out the appropriate size of the glass wool board. Ensure that the fire protection board can completely cover the surface of the air duct, and reserve a certain length of lap.

2. Wrap the fireproof board: the cut glass wool board is tightly fitted on the surface of the air duct to ensure that the glass wool board is smooth and without bubbles. At the joint, the fireproof board should be overlapped to a certain length to enhance the overall fire resistance.

3, fixing and sealing: use a special fixture or insulation nail to fix the glass wool board on the air duct to ensure that the glass wool board will not fall off. At the same time, apply fireproof sealant to the joints of the fireproof board to ensure the tightness of the joints.

Third, post-inspection and maintenance

After completing the fireproof package, a comprehensive inspection should be carried out to ensure that the fireproof material is fixed firmly and without omission. At the same time, regular maintenance of fireproof packages, check the integrity and sealing of fireproof materials, and timely detection and treatment of potential safety hazards.

4. Precautions

1, in the fire protection package, should be strictly in accordance with the relevant standards and specifications to ensure that each step meets the fire protection requirements.

2, the selection of fireproof materials and tools should have qualification certificates and quality assurance to ensure the reliability of the fire protection effect.

3, for some special parts or complex structure of the air duct, special fire treatment may be required. In actual operation, the corresponding solution should be developed according to the specific situation.

The fire-proof wrapping of the air duct with a fire-resistant time of 1 hour involves many links and details. During the construction process, we need to operate in strict accordance with the specifications, select the appropriate materials, and ensure the integrity and effectiveness of the fireproof package.