Abstract: V. The fireproof requirements of metal sandwich composite panels are metal sandwich composite insulation panels. The insulation core materials should be made of inorganic materials such as rock wool, mineral wool, glass wool or other non-combustible materials. 6. Construction requirements for building external thermal insulation 1. After the thermal insulation plates enter the site, they should not be stored in the open air and should be kept away from fire sources; when stored in the open air, the thermal insulation plates should adopt reliable protective measures.
Article source: The building in the general construction of the thermal insulation engineering network burned, and most of them were caused by electric welding to cause scaffolding to burn. If the floor is being insulated, it is not known that the insulation material has not played a role in fueling it. In the past, when CCTV caught fire, it was noticed that the insulation material was flammable. I don't know which kind of insulation material was at that time, but that one is definitely flammable and even flammable. . . Under the online query, the result found the following thing, it seems quite comprehensive, but it seems to be a revised version. The predecessors who are expected to participate in the actual project can come out and give pointers to see how the fire protection of insulation materials is generally treated in actual projects.
In addition, it is interesting to note: are such incidents usually occurring during construction, in the case of inadequate fire protection conditions, and if it is an activated building, when the exterior insulation material is unfortunately on fire, the fire Will it be so fierce? I wonder if there are any specific cases?
Here are the materials found -
Fire prevention measures for building exterior insulation materials (draft for comments)
Ministry of Public Security Fire Bureau Standards and Regulations Division China xxxxxxxx network
First, the external wall insulation material burning performance requirements
1. For public buildings with a building volume greater than 100,000 cubic meters or a building height greater than 32 meters and residential buildings with a building height greater than 100 meters, insulation materials made of inorganic materials such as rock wool, mineral wool and glass wool shall be used;
2. Except for public buildings with a building volume greater than 100,000 cubic meters or a building height greater than 32 meters and residential buildings with a building height greater than 100 meters, other buildings may use flammable materials for external wall insulation, but corresponding fireproof structures shall be adopted;
3. Non-combustible materials should be used for exterior decoration materials.
Second, the external wall uses the fireproof construction requirements of combustible materials
1. The insulation layer shall be horizontally and vertically separated by non-combustible materials, and its width shall not be less than 1 m. The area of ​​combustible insulation layer in each isolation zone of public buildings shall not exceed 30 m2, in each isolation zone of residential buildings. The area of ​​combustible insulation should not exceed 50 square meters;
2. The sides of the corners of the building shall be separated from the openings such as door openings and windows by non-combustible materials with a width of not less than 0.5 m;
3. The outer surface of the building shall be completely covered with non-combustible materials. When applied with cement mortar, its thickness shall not be less than 5 mm.
Third, the basic wall fire resistance and fire separation requirements
1. Regardless of the construction method adopted by the external wall of the building, the base wall of the inner side of the building shall be made of non-combustible body, and the fire resistance limit shall comply with the current regulations for fire protection of building design;
2. When the exterior wall of the building adopts the curtain wall, the gap between the curtain wall and each floor and partition wall shall be sealed with fireproof materials;
3. When the exterior wall of the building adopts a curtain wall with a vertical form in the form of a cavity, every two layers in the cavity shall be horizontally separated by a non-combustible body with a fire resistance limit of the floor.
Fourth, the roof insulation material combustion performance and fireproof construction requirements
1. When the building roof base adopts a non-combustible body with a fire resistance limit of not less than 1.00 hours, the roof may be made of combustible material as the insulation layer, and the rest shall be made of inorganic materials such as rock wool, mineral wool, glass wool or other non-combustible materials. Floor;
2. When the roof is made of combustible material for insulation layer, the insulation layer should be separated horizontally and vertically by non-combustible materials with a width of not less than 1 m. The area of ​​combustible insulation layer in each isolation zone should not exceed 100 m2; roof edge The insulation around the perimeter and the opening of the roof shall be separated by non-combustible materials with a width of not less than 0.5 m;
3. The outer surface of the roof should be completely covered with non-combustible materials.
5. Fire protection requirements for metal sandwich composite panels
The metal sandwich composite thermal insulation board shall be made of inorganic materials such as rock wool, mineral wool and glass wool or other non-combustible materials to keep the core material.
Sixth, construction requirements for building thermal insulation
1. After the insulation board enters the site, it should not be stored in the open air, and should be kept away from the fire source; when it is stored in the open air, the insulation board should take reliable protective measures.
2. The insulation board should be laid after the end of the welding process. It is necessary to carry out the welding and other processes after the insulation board is laid. Fireproof blankets should be used for fire protection around the welded parts, or non-combustible protective layers such as cement mortar should be applied to the combustible insulation materials for protection.
3. The hot melt and thermal bonding method of waterproof materials shall not be directly applied to the thermal insulation board.
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(Finish)(DCM, or Methylene Chloride) is an organic compound with the formula CH2Cl2. This colorless, volatile liquid with a moderately sweet aroma is widely used as a solvent. Although it is not miscible with water, it is miscible with many organic solvents. One of the most well-known applications of Dichloromethane is in the drinking bird heat engine.
DCM's volatility and ability to dissolve a wide range of organic compounds makes it a useful solvent for many chemical processes.
It is widely used as a paint stripper and a degreaser. In the food industry, it has been used to decaffeinate coffee and tea as well as to prepare extracts of hops and other flavorings. Its volatility has led to its use as an aerosol spray propellant and as a blowing agent for polyurethane foams.
Dichloromethane
Methylene Chloride,Methylene Dichloride,Dichloromethane Solvent,Methylene Chloride Solvent
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