What is the principle of frost cracking of water pipes?

Best answer: The density of ice is less than that of water. When water becomes ice, its volume expands and will increase by 10%. After the water pipe is frozen, it becomes an airtight container. After the water freezes, the volume expands, and the pressure generated cannot be transferred through the pipeline. It is necessary to break through the weakest part of the water pipe to release the pressure, which leads to the burst of the water pipe.

Principle of frost cracking of water pipes: The density of ice is less than that of water. When water freezes, its volume expands and increases by 10%. After the water pipe is frozen, it becomes an airtight container. After the water freezes, the volume expands, and the pressure generated cannot be transferred through the pipeline. It is necessary to break through the weakest part of the water pipe to release the pressure, which leads to the burst of the water pipe.

water pipe:

Water pipes are water supply pipes. Water pipes in modern decoration are all built with buried walls. There are three types of water pipes. The first type is metal pipes, such as hot-dip cast iron pipes lined with plastic, copper pipes and stainless steel pipes. The second category is plastic-clad metal pipes, such as steel-plastic composite pipes and aluminum-plastic composite pipes. The third category is plastic pipe, such as lead pipe and polypropylene fiber pipe.

In the past, the pipes used for water supply were mainly cast iron pipes. Sand mold cast iron pipes are mainly used outdoors, and galvanized cast iron pipes are used indoors. However, after several years of use, it is easy to produce a large amount of rust and scale, which will breed bacteria and seriously endanger human health. The state has stipulated that sand casting process pipe fittings and cold galvanized cast iron pipes should be eliminated from June 1, 2000, the use of hot galvanized cast iron pipes should be gradually restricted, and aluminum-plastic composite pipes and new plastic pipes should be popularized.

The state also stipulates that all kinds of pipes and fittings related to drinking water pipelines must be approved by the health department before they can be sold.

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