When choosing pipes, the following factors should be taken into account:
– a method of laying pipes (external or internal);
– the temperature of the coolant and its pressure in the heating system;
– type of installation of pipes (complex or simple styling);
– The possibility and availability of repair work.
When comparing the properties of the materials from which the pipes are made, one can judge the durability of the pipes, resistance to chemical or mechanical influences, the complexity of the installation.
Steel pipes have a high melting point (1500 ° C). But a sufficiently large thermal conductivity coefficient is the cause of high heat loss heat loss. Steel pipes do not require additional mounts. They should not be used in hidden heating systems, since they are predisposed to corrosion.
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Metal -plastic pipes have high operational characteristics. The working temperature of the pipes is 95 ° C, short -term – 130 ° C. These pipes are attractive to the ease of installation.
Polyethylene pipes are made of heat -resistant and high -strength material. The maximum permissible operating temperature reaches 90 ° C, which meets the requirements of heating systems used in everyday life. Polyethylene pipes have a service life reaching fifty years.
Polyvinyl chloride pipes (PVC) are not often used in heating systems, since small operating temperatures equal to 70 ° C. However, polyvinyl chloride pipes are used in cold water supply.
Pipes of different materials have their own certain method of installation. Copper pipes are soldered with silver solder, polypropylene pipes are mounted with diffuser welding, the connection of metal-plastic pipes is carried out using press fitting.
Each type of pipes involves certain equipment for their installation.