Orifice plate flowmeter for measuring steam

It’s possible that after one circuit was shut down, the air consumption of the other circuits increased, so the flow rate remained roughly the same.

In this case, it is necessary to check whether there is any change in pressure after shutting off the steam supply for a certain process It is also necessary to see what the ratio is between the amount of steam used along the closed path and the total amount of steam

This depends on the ratio between the master table and the subordinate tables; after one of them is disabled, the ratio between the master and subordinate tables changes, and it’s necessary to wait at least a few hours before obtaining accurate statistics.

It is possible that the total gas consumption remains largely unchanged after closing the back route; it is best to determine the gas consumption of each individual branch.

Does it have temperature and pressure compensation? It should be compared under standard conditions

The orifice plate limits the flow rate; if one more pipe is used for gas supply, the flow rate exceeds the measurement capacity of that orifice plate. In other words, just using one additional pipe for gas supply is enough to cause this issue

If you close one gas branch, and if the valve isn’t used to regulate flow, the amount of gas used by the other branches will increase

Looking for other reasons is putting the cart before the horse. When the branch line with the highest gas consumption is turned off, if the total reading doesn’t change, the most likely explanation is that the main meter is inaccurate; any other reasons are merely speculative. It is recommended that the original poster check the instantaneous flow rates of both the main meter and the individual branch meters at the time when the branch valves are closed

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