3.5 Relationship between temperature and internal pressure of medium-pressure steam for pipe warming

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This post was last edited by Yu Qin on 2019-10-7 at 12:09. For steam pipe heating, if the process is relatively long, it should be carried out in stages to prevent severe water hammer. Before introducing air, first drain the condensate from the back route; then open the valve slowly to introduce air. If water hammer occurs, increase the drainage rate while closing the air supply valve. Once full vaporization has occurred, the drains along the pipeline are closed, with only the drain at the end remaining, in order to allow the steam to exchange heat within the pipes for as long as possible. After allowing some time for the gas supply valve to operate, if the temperature of the pipeline no longer rises, it is necessary to increase the pressure in the pipeline by reducing the discharge valve or by opening the gas supply valve wider, thereby raising the pressure inside the pipeline and causing the temperature to increase as well.