The classification of heat-supply pipelines
According to the different flow media in
the pipe, it can be divided into steam pipes and hot water pipes.
According to the different working pressure,
the heat-supply pipeline can be divided into three types: low pressure, medium pressure and high pressure pipelines.
According to the different pipe-laying positions, it can be divided into indoor and outdoor
heat-supply pipes.
The features of heat-supply pipelines
The most prominent feature of hot water pipes and steam pipes is the thermal expansion and contraction of pipes caused by temperature changes.
During installation, the pipeline is at normal temperature. When it is first operated (transmission of the heat medium), the pipeline will stretch sharply due to the sudden increase of temperature. When the operation is stopped, the pipeline will contract gradually with the decrease of temperature.
The thermal expansion and contraction of the pipeline will produce a great stress on the fixed points at both ends of the pipe, which will cause the pipeline to deform and even damage the support. Therefore, measures should be taken when
the heat-supply pipeline is installed. Set a compensator to eliminate the stress caused by changes in temperature.
For the steam pipeline, in addition to thermal expansion and contraction, it has another feature: condensed water will be produced due to heat dissipation and other reasons during steam transportation.
The condensed water in the steam pipeline is extremely unfavorable to the normal operation of the system. It not only deteriorates the quality of steam, but also hinders the normal flow of steam, resulting in water hammer, noise, etc. Therefore, during the steam pipe installation, set up drainage and condensate removal devices to discharge the generated condensate in time.
