Fire protection of seamless pipe

Keywords:seamless pipe
Seamless pipe usually lose their carrying capacity at a temperature of 450-650 °C and undergo great deformation, resulting in bending of the steel columns and steel beams. As a result, they can not continue to be used because of excessive deformation. Generally, the fire resistance of unprotected seamless pipe is about 15 minutes. The length of time is also related to the rate of heat absorption by the components. The following describes several different seamless pipe fire protection measures.

1, The outer layer. It is to add the appearance of seamless pipe cladding, you can pour molding, spray method can also be used. Cast-in-place solid concrete overlays are usually reinforced with steel mesh or steel reinforcement to limit shrinkage cracks and ensure the strength of the enclosure. Spraying can be applied to the surface of the seamless pipe in the construction site to apply sand pump to form a protective layer, the sand pump can be lime cement or gypsum mortar, can also be mixed with perlite or asbestos. At the same time the outer layer can also be made of perlite, asbestos, gypsum or asbestos cement, light concrete made of prefabricated panels, the use of adhesives, nails, bolts fixed on the seamless pipe.

2, Water. Hollow seamless pipe filled with water is to resist the most effective fire protection measures. This method can make seamless pipe to maintain a low temperature in the fire, water circulation in the seamless pipe to absorb the heat of the material itself. The heated water can be recirculated after it is cooled, or cold water can be introduced into the pipe to replace the heated water.

3, Shielding. Seamless pipe set in the refractory walls or ceilings, or components in the two walls hidden in the gap, as long as the addition of a little refractories or not to achieve the purpose of fire. This is one of the most economical methods of fire prevention.

4, Expansion of materials. The use of seamless pipe fire protection coating components, this method has good fire and heat insulation, construction from the geometric constraints of seamless pipe, etc., generally do not need to add auxiliary facilities, and the coating of light weight, there are some beautiful decoration. The role of modern advanced fire safety technology and measures.

At present, the high-rise seamless pipe construction is increasing, especially in some super tall buildings, the use of seamless pipe material is more extensive. In the event of a fire accident in a high-rise building, the fire can not be extinguished in a short period of time. This requires us to increase the fire protection of building materials in the design of buildings in order to increase their fire resistance limits and to formulate the necessary emergency Programs to reduce casualties and property losses.

seamless pipe

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