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Some Knowledge of Radiator

Radiator is a heating device, at the same time it is also a water container with hot water flow inside the pipe. When choosing the radiator, we always hear some proper nouns about the radiator pressure, such as working pressure, test pressure, system pressure, etc. The pressures will have their own corresponding parameters. For people who lack of HVAC knowledge, these related pressure parameters are like hieroglyphics, people never understand. Here let’s learn together to understand the knowledge.

Working pressure refers to the maximum allowable operating pressure of the radiator. Unit of measurement is MPA. Under normal circumstances, steel radiator working pressure is 0.8mpa, copper and aluminum composite radiator working pressure 1.0mpa.

Test pressure is the necessary technical requirement to test the radiator air tightness and strength, normally 1.2-1.5 times of the working pressure, for example in China, radiator tightness test value is 1.8mpa for manufacturers during production process, after the pressure reaches a stable value for one minute without welding deformation and no leakage then it is qualified.

Heating system pressure is generally in 0.4mpa, radiator installation tightness test should be carried out after the completion, pressure drop should not exceed 0.05mpa in 10 minutes, indoor heating systems stop pressing time is 5 minutes, pressure drop should not more than 0.02mpa. The inspection should be focused on pipes connecting, radiator connecting and also valve connecting.

From the above analysis, we can see clearly that radiator test pressure is larger than the working pressure, and working pressure is larger than the system pressure. So, if the radiator manufacturer can follow this way to choose materials, be strict to production processes, radiator compressive property will be guaranteed and have very small chance of bursting during daily use.