Interpretation of the layout specifications for steam pipeline branches

This requirement applies to pipes used for high-pressure, high-temperature, and high-quality steam, such as main steam pipes, high-pressure reheat steam pipes, high-pressure condensate pipes, etc. The steam requirements for these pipelines are quite strict; stability and purity must be maintained. If branch pipes are connected to these pipelines, it may affect the quality of the steam inside them. The specific specifications should contain detailed explanations; you can refer to the relevant specification manuals. Whether a branch can be connected to the steam inlet pipe of the turbine for heating the bottom head of the tower depends on the specific circumstances. Generally, the steam quality in the steam inlet pipeline is relatively high; connecting a branch directly to it may affect the normal operation of the turbine. Therefore, careful evaluation and design are required before connecting the branch to ensure that it does not have an adverse effect on the steam inlet pipe. At the same time, corresponding measures also need to be taken during the connection process, such as adding isolation valves and control valves. It is recommended to carry out the design and construction under the guidance of professionals. .

Thank you for your reply. Our steam pressure is 3.5 MPAG; since the heating for the bottom head of the tower is also at 3.5 MPAG, we decided to use the same pipeline to simplify things, but it doesn’t seem quite right to do that. I haven’t found any detailed explanations for this point in the specifications or manuals I’ve seen. Do you have any such specification manuals?

We generally consider turbines, steam for fire suppression, and steam for heating to be pipelines with strict gas usage requirements; usually, steam lines for other purposes are not connected directly to these pipelines

Thank you for your reply. May I ask whether using steam or purge steam lines in a heat tracing station is considered strict gas usage?