Flare timer

When a flare is attached to a tank containing a flammable gas, it burns until the tank is empty, regardless of how full or empty you want it to be. Please add flare timers or stop flaring when a tank reaches a desired level of fullness or restart when the tank reaches a desired fullness level.

I think I get your problem and I have a work around. Place one tank where the gas can be input by pipe or trucks. Behind that you place a balancer. To that balancer you connect a new tank that will always be filled and set that to priority output. Then you connect a pipe to the balancer going to the flare. Now if your tank it full the overflow will be send to your flare.

I appreciate your workaround and hope the developers implement my suggestion.