Issues regarding the placement of the feed inlet and return inlet in flammable storage tanks.

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Please refer to the diagram: There is a storage tank containing Class A/B liquids, which are volatile; therefore, a condenser has been installed. The liquid after condensation flows back to the storage tank through a return pipe. The material inlet is located on the left side of the diagram, at the top of the tank. My question is: 1. What should be the distance between the outlet of the feed pipe inside the tank and the bottom of the tank? Is it supposed to be less than or equal to 200? There are regulations regarding this due to static electricity issues, but I’m not sure exactly which regulations apply. I need these regulations so that I can explain them to the experts. 2. Does the return pipe, as shown in the diagram, need to extend inside the tank? Is it still not necessary to extend inward? If necessary, how much does it need to be extended? What is the distance from the bottom of the tank? I found that many of these jars lack an inward-extending return tube. Or extend obliquely toward the tank wall. Some experts say that when the liquid returns to the tank, it may generate static electricity due to disturbances caused by the flow from a higher height, which is similar to the first reason? Which standards require this? Thank you all. There are generous rewards for providing standards.